first commit

.venv/Lib/site-packages/notebook/tests/selenium/conftest.py

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+import json
+import nbformat
+from nbformat.v4 import new_notebook, new_code_cell
+import os
+import pytest
+import requests
+from subprocess import Popen
+import sys
+from tempfile import mkstemp
+from testpath.tempdir import TemporaryDirectory
+import time
+from urllib.parse import urljoin
+
+from selenium.webdriver import Firefox, Remote, Chrome
+from .utils import Notebook
+
+pjoin = os.path.join
+
+
+def _wait_for_server(proc, info_file_path):
+    """Wait 30 seconds for the notebook server to start"""
+    for i in range(300):
+        if proc.poll() is not None:
+            raise RuntimeError("Notebook server failed to start")
+        if os.path.exists(info_file_path):
+            try:
+                with open(info_file_path) as f:
+                    return json.load(f)
+            except ValueError:
+                # If the server is halfway through writing the file, we may
+                # get invalid JSON; it should be ready next iteration.
+                pass
+        time.sleep(0.1)
+    raise RuntimeError("Didn't find %s in 30 seconds", info_file_path)
+
+
+@pytest.fixture(scope='session')
+def notebook_server():
+    info = {}
+    with TemporaryDirectory() as td:
+        nbdir = info['nbdir'] = pjoin(td, 'notebooks')
+        os.makedirs(pjoin(nbdir, 'sub ∂ir1', 'sub ∂ir 1a'))
+        os.makedirs(pjoin(nbdir, 'sub ∂ir2', 'sub ∂ir 1b'))
+
+        info['extra_env'] = {
+            'JUPYTER_CONFIG_DIR': pjoin(td, 'jupyter_config'),
+            'JUPYTER_RUNTIME_DIR': pjoin(td, 'jupyter_runtime'),
+            'IPYTHONDIR': pjoin(td, 'ipython'),
+        }
+        env = os.environ.copy()
+        env.update(info['extra_env'])
+
+        command = [sys.executable, '-m', 'notebook',
+                   '--no-browser',
+                   '--notebook-dir', nbdir,
+                   # run with a base URL that would be escaped,
+                   # to test that we don't double-escape URLs
+                   '--NotebookApp.base_url=/a@b/',
+                   ]
+        print("command=", command)
+        proc = info['popen'] = Popen(command, cwd=nbdir, env=env)
+        info_file_path = pjoin(td, 'jupyter_runtime',
+                               f'nbserver-{proc.pid:d}.json')
+        info.update(_wait_for_server(proc, info_file_path))
+
+        print("Notebook server info:", info)
+        yield info
+
+    # Shut the server down
+    requests.post(urljoin(info['url'], 'api/shutdown'),
+                  headers={'Authorization': 'token '+info['token']})
+
+
+def make_sauce_driver():
+    """This function helps travis create a driver on Sauce Labs.
+
+    This function will err if used without specifying the variables expected
+    in that context.
+    """
+
+    username = os.environ["SAUCE_USERNAME"]
+    access_key = os.environ["SAUCE_ACCESS_KEY"]
+    capabilities = {
+        "tunnel-identifier": os.environ["TRAVIS_JOB_NUMBER"],
+        "build": os.environ["TRAVIS_BUILD_NUMBER"],
+        "tags": [os.environ['TRAVIS_PYTHON_VERSION'], 'CI'],
+        "platform": "Windows 10",
+        "browserName": os.environ['JUPYTER_TEST_BROWSER'],
+        "version": "latest",
+    }
+    if capabilities['browserName'] == 'firefox':
+        # Attempt to work around issue where browser loses authentication
+        capabilities['version'] = '57.0'
+    hub_url = f"{username}:{access_key}@localhost:4445"
+    print("Connecting remote driver on Sauce Labs")
+    driver = Remote(desired_capabilities=capabilities,
+                    command_executor=f"http://{hub_url}/wd/hub")
+    return driver
+
+
+@pytest.fixture(scope='session')
+def selenium_driver():
+    if os.environ.get('SAUCE_USERNAME'):
+        driver = make_sauce_driver()
+    elif os.environ.get('JUPYTER_TEST_BROWSER') == 'chrome':
+        driver = Chrome()
+    else:
+        driver = Firefox()
+
+    yield driver
+
+    # Teardown
+    driver.quit()
+
+
+@pytest.fixture(scope='module')
+def authenticated_browser(selenium_driver, notebook_server):
+    selenium_driver.jupyter_server_info = notebook_server
+    selenium_driver.get("{url}?token={token}".format(**notebook_server))
+    return selenium_driver
+
+@pytest.fixture
+def notebook(authenticated_browser):
+    tree_wh = authenticated_browser.current_window_handle
+    yield Notebook.new_notebook(authenticated_browser)
+    authenticated_browser.switch_to.window(tree_wh)
+
+@pytest.fixture
+def prefill_notebook(selenium_driver, notebook_server):
+    def inner(cells):
+        cells = [new_code_cell(c) if isinstance(c, str) else c
+                 for c in cells]
+        nb = new_notebook(cells=cells)
+        fd, path = mkstemp(dir=notebook_server['nbdir'], suffix='.ipynb')
+        with open(fd, 'w', encoding='utf-8') as f:
+            nbformat.write(nb, f)
+        fname = os.path.basename(path)
+        selenium_driver.get(
+            "{url}notebooks/{}?token={token}".format(fname, **notebook_server)
+        )
+        return Notebook(selenium_driver)
+
+    return inner

.venv/Lib/site-packages/notebook/tests/selenium/quick_selenium.py

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+"""Utilities for driving Selenium interactively to develop tests.
+
+These are not used in the tests themselves - rather, the developer writing tests
+can use them to experiment with Selenium.
+"""
+from selenium.webdriver import Firefox
+
+from notebook.tests.selenium.utils import Notebook
+from notebook.notebookapp import list_running_servers
+
+class NoServerError(Exception):
+
+    def __init__(self, message):
+        self.message = message
+
+def quick_driver(lab=False):
+    """Quickly create a selenium driver pointing at an active noteboook server.
+
+    Usage example:
+    
+        from notebook.tests.selenium.quick_selenium import quick_driver
+        driver = quick_driver
+        
+    Note: you need to manually close the driver that opens with driver.quit()
+    """
+    try:
+        server = list(list_running_servers())[0]
+    except IndexError as e:
+        raise NoServerError('You need a server running before you can run '
+                            'this command') from e
+    driver = Firefox()
+    auth_url = '{url}?token={token}'.format(**server)
+    driver.get(auth_url)
+
+    # If this redirects us to a lab page and we don't want that;
+    # then we need to redirect ourselves to the classic notebook view
+    if driver.current_url.endswith('/lab') and not lab:
+        driver.get(driver.current_url.rstrip('lab')+'tree')
+    return driver
+
+
+def quick_notebook():
+    """Quickly create a new classic notebook in a selenium driver
+
+
+    Usage example:
+    
+        from notebook.tests.selenium.quick_selenium import quick_notebook
+        nb = quick_notebook()
+
+    Note: you need to manually close the driver that opens with nb.browser.quit()
+    """
+    return Notebook.new_notebook(quick_driver())

.venv/Lib/site-packages/notebook/tests/selenium/test_buffering.py

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+"""Tests buffering of execution requests."""
+
+from .utils import wait_for_selector
+
+
+def wait_for_cell_text_output(notebook, index):
+    cell = notebook.cells[index]
+    output = wait_for_selector(cell, ".output_text", single=True)
+    return output.text
+
+
+def wait_for_kernel_ready(notebook):
+    wait_for_selector(notebook.browser, ".kernel_idle_icon")
+
+
+def test_kernels_buffer_without_conn(prefill_notebook):
+    """Test that execution request made while disconnected is buffered."""
+    notebook = prefill_notebook(["print(1 + 2)"])
+
+    wait_for_kernel_ready(notebook)
+    notebook.browser.execute_script("IPython.notebook.kernel.stop_channels();")
+    notebook.execute_cell(0)
+    notebook.browser.execute_script("IPython.notebook.kernel.reconnect();")
+    wait_for_kernel_ready(notebook)
+
+    assert wait_for_cell_text_output(notebook, 0) == "3"
+
+
+def test_buffered_cells_execute_in_order(prefill_notebook):
+    """Test that buffered requests execute in order."""
+    notebook = prefill_notebook(['', 'k=1', 'k+=1', 'k*=3', 'print(k)'])
+
+    # Repeated execution of cell queued up in the kernel executes
+    # each execution request in order.
+    wait_for_kernel_ready(notebook)
+    notebook.browser.execute_script("IPython.notebook.kernel.stop_channels();")
+    # k == 1
+    notebook.execute_cell(1)
+    # k == 2
+    notebook.execute_cell(2)
+    # k == 6
+    notebook.execute_cell(3)
+    # k == 7
+    notebook.execute_cell(2)
+    notebook.execute_cell(4)
+    notebook.browser.execute_script("IPython.notebook.kernel.reconnect();")
+    wait_for_kernel_ready(notebook)
+
+    # Check that current value of k is 7
+    assert wait_for_cell_text_output(notebook, 4) == "7"

.venv/Lib/site-packages/notebook/tests/selenium/test_clipboard_multiselect.py

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+"""Tests clipboard by copying, cutting and pasting multiple cells"""
+from selenium.webdriver.common.keys import Keys
+from .utils import wait_for_selector, wait_for_xpath
+
+def test_clipboard_multiselect(prefill_notebook):
+    notebook = prefill_notebook(['', '1', '2', '3', '4', '5a', '6b', '7c', '8d'])
+
+    assert notebook.get_cells_contents() == ['', '1', '2', '3', '4', '5a', '6b', '7c', '8d']
+    
+    # Select the first 3 cells with value and replace the last 3
+    [notebook.body.send_keys(Keys.UP) for i in range(8)]
+    notebook.select_cell_range(1, 3)
+    notebook.body.send_keys("c")
+    notebook.select_cell_range(6, 8)
+    wait_for_xpath(notebook.browser, '//a[text()="Edit"]', single=True).click()
+    wait_for_selector(notebook.browser, '#paste_cell_replace', single=True).click()
+
+    assert notebook.get_cells_contents() == ['', '1', '2', '3', '4', '5a', '1', '2', '3']
+    
+    # Select the last four cells, cut them and paste them below the first cell
+    notebook.select_cell_range(5, 8)
+    wait_for_selector(notebook.browser, '.fa-cut.fa', single=True).click()
+    for i in range(8):
+        notebook.body.send_keys(Keys.UP)
+    notebook.body.send_keys("v")
+
+    assert notebook.get_cells_contents() == ['', '5a', '1', '2', '3', '1', '2', '3', '4']

.venv/Lib/site-packages/notebook/tests/selenium/test_dashboard_nav.py

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+import os
+
+from notebook.utils import url_path_join
+from notebook.tests.selenium.utils import wait_for_selector
+pjoin = os.path.join
+
+
+class PageError(Exception):
+    """Error for an action being incompatible with the current jupyter web page."""
+    def __init__(self, message):
+        self.message = message
+
+
+def url_in_tree(browser, url=None):
+    if url is None:
+        url = browser.current_url
+    tree_url = url_path_join(browser.jupyter_server_info['url'], 'tree')
+    return url.startswith(tree_url)
+
+
+def get_list_items(browser):
+    """Gets list items from a directory listing page
+
+    Raises PageError if not in directory listing page (url has tree in it)
+    """
+    if not url_in_tree(browser):
+        raise PageError("You are not in the notebook's file tree view."
+                        "This function can only be used the file tree context.")
+    # we need to make sure that at least one item link loads
+    wait_for_selector(browser, '.item_link')
+
+    return [{
+        'link': a.get_attribute('href'),
+        'label': a.find_element_by_class_name('item_name').text,
+        'element': a,
+    } for a in browser.find_elements_by_class_name('item_link')]
+
+def only_dir_links(browser):
+    """Return only links that point at other directories in the tree"""
+    items = get_list_items(browser)
+    return [i for i in items 
+            if url_in_tree(browser, i['link']) and i['label'] != '..']
+
+def test_items(authenticated_browser):
+    visited_dict = {}
+    # Going down the tree to collect links
+    while True:
+        wait_for_selector(authenticated_browser, '.item_link')
+        current_url = authenticated_browser.current_url
+        items = visited_dict[current_url] = only_dir_links(authenticated_browser)
+        try: 
+            item = items[0]
+            item["element"].click()
+            assert authenticated_browser.current_url == item['link']
+        except IndexError:
+            break
+    # Going back up the tree while we still have unvisited links
+    while visited_dict:
+        current_items = only_dir_links(authenticated_browser)
+        current_items_links = [item["link"] for item in current_items]
+        stored_items = visited_dict.pop(authenticated_browser.current_url)
+        stored_items_links = [item["link"] for item in stored_items]
+        assert stored_items_links == current_items_links
+        authenticated_browser.back()
+

.venv/Lib/site-packages/notebook/tests/selenium/test_deletecell.py

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+def cell_is_deletable(nb, index):
+    JS = f'return Jupyter.notebook.get_cell({index}).is_deletable();'
+    return nb.browser.execute_script(JS)
+
+def remove_all_cells(notebook):
+    for i in range(len(notebook.cells)):
+        notebook.delete_cell(0)
+
+INITIAL_CELLS = ['print("a")', 'print("b")', 'print("c")']
+
+def test_delete_cells(prefill_notebook):
+    a, b, c = INITIAL_CELLS
+    notebook = prefill_notebook(INITIAL_CELLS)
+
+    # Validate initial state
+    assert notebook.get_cells_contents() == [a, b, c]
+    for cell in range(0, 3):
+        assert cell_is_deletable(notebook, cell)
+
+    notebook.set_cell_metadata(0, 'deletable', 'false')
+    notebook.set_cell_metadata(1, 'deletable', 0
+    )
+    assert not cell_is_deletable(notebook, 0)
+    assert cell_is_deletable(notebook, 1)
+    assert cell_is_deletable(notebook, 2)
+
+    # Try to delete cell a (should not be deleted)
+    notebook.delete_cell(0)
+    assert notebook.get_cells_contents() == [a, b, c]
+
+    # Try to delete cell b (should succeed)
+    notebook.delete_cell(1)
+    assert notebook.get_cells_contents() == [a, c]
+
+    # Try to delete cell c (should succeed)
+    notebook.delete_cell(1)
+    assert notebook.get_cells_contents() == [a]
+
+    # Change the deletable state of cell a
+    notebook.set_cell_metadata(0, 'deletable', 'true')
+
+    # Try to delete cell a (should succeed)
+    notebook.delete_cell(0)
+    assert len(notebook.cells) == 1 # it contains an empty cell
+
+    # Make sure copied cells are deletable
+    notebook.edit_cell(index=0, content=a)
+    notebook.set_cell_metadata(0, 'deletable', 'false')
+    assert not cell_is_deletable(notebook, 0)
+    notebook.to_command_mode()
+    notebook.current_cell.send_keys('cv')
+    assert len(notebook.cells) == 2
+    assert cell_is_deletable(notebook, 1)
+
+    notebook.set_cell_metadata(0, 'deletable', 'true')  # to perform below test, remove all the cells
+    remove_all_cells(notebook)
+    assert len(notebook.cells) == 1    # notebook should create one automatically on empty notebook

.venv/Lib/site-packages/notebook/tests/selenium/test_display_image.py

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+"""Test display of images
+
+The effect of shape metadata is validated, using Image(retina=True)
+"""
+
+from .utils import wait_for_tag
+
+
+# 2x2 black square in b64 jpeg and png
+b64_image_data = {
+    "image/png" : b'iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAAD91JpzAAAAC0lEQVR4nGNgQAYAAA4AAamRc7EA\\nAAAASUVORK5CYII',
+    "image/jpeg" : b'/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0a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\noAoo2Qoo'
+}
+
+
+def imports(notebook):
+    commands = [
+        'import base64',
+        'from IPython.display import display, Image',
+    ]
+    notebook.edit_cell(index=0, content="\n".join(commands))
+    notebook.execute_cell(0)
+
+
+def validate_img(notebook, cell_index, image_fmt, retina):
+    """Validate that image renders as expected."""
+
+    b64data = b64_image_data[image_fmt]
+    commands = [
+        f'b64data = {b64data}',
+        'data = base64.decodebytes(b64data)',
+        f'display(Image(data, retina={retina}))'
+    ]
+    notebook.append("\n".join(commands))
+    notebook.execute_cell(cell_index)
+
+    # Find the image element that was just displayed
+    wait_for_tag(notebook.cells[cell_index], "img", single=True)
+    img_element = notebook.cells[cell_index].find_element_by_tag_name("img")
+
+    src = img_element.get_attribute("src")
+    prefix = src.split(',')[0]
+    expected_prefix = f"data:{image_fmt};base64"
+    assert prefix == expected_prefix
+
+    expected_size = 1 if retina else 2
+    assert img_element.size["width"] == expected_size
+    assert img_element.size["height"] == expected_size
+    assert img_element.get_attribute("width") == str(expected_size)
+    assert img_element.get_attribute("height") == str(expected_size)
+
+
+def test_display_image(notebook):
+    imports(notebook)
+    # PNG, non-retina
+    validate_img(notebook, 1, "image/png", False)
+
+    # PNG, retina display
+    validate_img(notebook, 2, "image/png", True)
+
+    # JPEG, non-retina
+    validate_img(notebook, 3, "image/jpeg", False)
+
+    # JPEG, retina display
+    validate_img(notebook, 4, "image/jpeg", True)

.venv/Lib/site-packages/notebook/tests/selenium/test_display_isolation.py

@@ -0,0 +1,94 @@
+"""Test display isolation.
+
+An object whose metadata contains an "isolated" tag must be isolated
+from the rest of the document.
+"""
+from .utils import wait_for_tag
+
+
+def test_display_isolation(notebook):
+    import_ln = "from IPython.core.display import HTML, SVG, display, display_svg"
+    notebook.edit_cell(index=0, content=import_ln)
+    notebook.execute_cell(notebook.current_cell)
+    try:
+        isolated_html(notebook)
+        isolated_svg(notebook)
+    finally:
+        # Ensure we switch from iframe back to default content even if test fails
+        notebook.browser.switch_to.default_content()
+
+
+def isolated_html(notebook):
+    """Test HTML display isolation.
+
+    HTML styling rendered without isolation will affect the whole
+    document, whereas styling applied with isolation will affect only
+    the local display object.
+    """
+    red = 'rgb(255, 0, 0)'
+    blue = 'rgb(0, 0, 255)'
+    test_str = "<div id='test'>Should turn red from non-isolation</div>"
+    notebook.add_and_execute_cell(content=f"display(HTML({test_str!r}))")
+    non_isolated = (
+        f"<style>div{{color:{red};}}</style>"
+        f"<div id='non-isolated'>Should be red</div>")
+    display_ni = f"display(HTML({non_isolated!r}), metadata={{'isolated':False}})"
+    notebook.add_and_execute_cell(content=display_ni)
+    isolated = (
+        f"<style>div{{color:{blue};}}</style>"
+        f"<div id='isolated'>Should be blue</div>")
+    display_i = f"display(HTML({isolated!r}), metadata={{'isolated':True}})"
+    notebook.add_and_execute_cell(content=display_i)
+
+    iframe = wait_for_tag(notebook.browser, "iframe", single=True)
+
+    # The non-isolated div will be in the body
+    non_isolated_div = notebook.body.find_element_by_id("non-isolated")
+    assert non_isolated_div.value_of_css_property("color") == red
+
+    # The non-isolated styling will have affected the output of other cells
+    test_div = notebook.body.find_element_by_id("test")
+    assert test_div.value_of_css_property("color") == red
+
+    # The isolated div will be in an iframe, only that element will be blue
+    notebook.browser.switch_to.frame(iframe)
+    isolated_div = notebook.browser.find_element_by_id("isolated")
+    assert isolated_div.value_of_css_property("color") == blue
+    notebook.browser.switch_to.default_content()
+    # Clean up the html test cells
+    for i in range(1, len(notebook.cells)):
+        notebook.delete_cell(1)
+
+
+def isolated_svg(notebook):
+    """Test that multiple isolated SVGs have different scopes.
+
+    Asserts that there no CSS leaks between two isolated SVGs.
+    """
+    yellow = "rgb(255, 255, 0)"
+    black = "rgb(0, 0, 0)"
+    svg_1_str = f"""s1 = '''<svg width="1cm" height="1cm" viewBox="0 0 1000 500"><defs><style>rect {{fill:{yellow};}}; </style></defs><rect id="r1" x="200" y="100" width="600" height="300" /></svg>'''"""
+    svg_2_str = """s2 = '''<svg width="1cm" height="1cm" viewBox="0 0 1000 500"><rect id="r2" x="200" y="100" width="600" height="300" /></svg>'''"""
+
+    notebook.add_and_execute_cell(content=svg_1_str)
+    notebook.add_and_execute_cell(content=svg_2_str)
+    notebook.add_and_execute_cell(
+        content="display_svg(SVG(s1), metadata=dict(isolated=True))")
+    notebook.add_and_execute_cell(
+        content="display_svg(SVG(s2), metadata=dict(isolated=True))")
+    iframes = wait_for_tag(notebook.browser, "iframe", wait_for_n=2)
+
+    # The first rectangle will be red
+    notebook.browser.switch_to.frame(iframes[0])
+    isolated_svg_1 = notebook.browser.find_element_by_id('r1')
+    assert isolated_svg_1.value_of_css_property("fill") == yellow
+    notebook.browser.switch_to.default_content()
+
+    # The second rectangle will be black
+    notebook.browser.switch_to.frame(iframes[1])
+    isolated_svg_2 = notebook.browser.find_element_by_id('r2')
+    assert isolated_svg_2.value_of_css_property("fill") == black
+
+    # Clean up the svg test cells
+    for i in range(1, len(notebook.cells)):
+        notebook.delete_cell(1)

.venv/Lib/site-packages/notebook/tests/selenium/test_dualmode_arrows.py

@@ -0,0 +1,103 @@
+"""Tests arrow keys on both command and edit mode"""
+from selenium.webdriver.common.keys import Keys
+
+def test_dualmode_arrows(notebook):
+
+    # Tests in command mode.
+    # Setting up the cells to test the keys to move up.
+    notebook.to_command_mode()
+    [notebook.body.send_keys("b") for i in range(3)]
+
+    # Use both "k" and up arrow keys to moving up and enter a value.
+    # Once located on the top cell, use the up arrow keys to prove the top cell is still selected.
+    notebook.body.send_keys("k")
+    notebook.body.send_keys(Keys.ENTER)
+    notebook.body.send_keys("2")
+    notebook.to_command_mode()
+    notebook.body.send_keys(Keys.UP)
+    notebook.body.send_keys(Keys.ENTER)
+    notebook.body.send_keys("1")
+    notebook.to_command_mode()
+    notebook.body.send_keys("k")
+    notebook.body.send_keys(Keys.UP)
+    notebook.body.send_keys(Keys.ENTER)
+    notebook.body.send_keys("0")
+    notebook.to_command_mode()
+    assert notebook.get_cells_contents() == ["0", "1", "2", ""]
+
+    # Use the "k" key on the top cell as well
+    notebook.body.send_keys("k")
+    notebook.body.send_keys(Keys.ENTER)
+    notebook.body.send_keys(" edit #1")
+    notebook.to_command_mode()
+    assert notebook.get_cells_contents() == ["0 edit #1", "1", "2", ""]
+
+    # Setting up the cells to test the keys to move down
+    [notebook.body.send_keys("j") for i in range(3)]
+    [notebook.body.send_keys("a") for i in range(2)]
+    notebook.body.send_keys("k")
+
+    # Use both "j" key and down arrow keys to moving down and enter a value.
+    # Once located on the bottom cell, use the down arrow key to prove the bottom cell is still selected.
+    notebook.body.send_keys(Keys.DOWN)
+    notebook.body.send_keys(Keys.ENTER)
+    notebook.body.send_keys("3")
+    notebook.to_command_mode()
+    notebook.body.send_keys("j")
+    notebook.body.send_keys(Keys.ENTER)
+    notebook.body.send_keys("4")
+    notebook.to_command_mode()
+    notebook.body.send_keys("j")
+    notebook.body.send_keys(Keys.DOWN)
+    notebook.body.send_keys(Keys.ENTER)
+    notebook.body.send_keys("5")
+    notebook.to_command_mode()
+    assert notebook.get_cells_contents() == ["0 edit #1", "1", "2", "3", "4", "5"]
+
+    # Use the "j" key on the top cell as well
+    notebook.body.send_keys("j")
+    notebook.body.send_keys(Keys.ENTER)
+    notebook.body.send_keys(" edit #1")
+    notebook.to_command_mode()
+    assert notebook.get_cells_contents() == ["0 edit #1", "1", "2", "3", "4", "5 edit #1"]
+
+    # On the bottom cell, use both left and right arrow keys to prove the bottom cell is still selected.
+    notebook.body.send_keys(Keys.LEFT)
+    notebook.body.send_keys(Keys.ENTER)
+    notebook.body.send_keys(", #2")
+    notebook.to_command_mode()
+    assert notebook.get_cells_contents() == ["0 edit #1", "1", "2", "3", "4", "5 edit #1, #2"]
+    notebook.body.send_keys(Keys.RIGHT)
+    notebook.body.send_keys(Keys.ENTER)
+    notebook.body.send_keys(" and #3")
+    notebook.to_command_mode()
+    assert notebook.get_cells_contents() == ["0 edit #1", "1", "2", "3", "4", "5 edit #1, #2 and #3"]
+
+
+    # Tests in edit mode.
+    # First, erase the previous content and then setup the cells to test the keys to move up.
+    [notebook.browser.find_element_by_class_name("fa-cut.fa").click() for i in range(6)]
+    [notebook.body.send_keys("b") for i in range(2)]
+    notebook.body.send_keys("a")
+    notebook.body.send_keys(Keys.ENTER)
+
+    # Use the up arrow key to move down and enter a value.
+    # We will use the left arrow key to move one char to the left since moving up on last character only moves selector to the first one.
+    # Once located on the top cell, use the up arrow key to prove the top cell is still selected.
+    notebook.body.send_keys(Keys.UP)
+    notebook.body.send_keys("1")
+    notebook.body.send_keys(Keys.LEFT)
+    [notebook.body.send_keys(Keys.UP) for i in range(2)]
+    notebook.body.send_keys("0")
+
+    # Use the down arrow key to move down and enter a value.
+    # We will use the right arrow key to move one char to the right since moving down puts selector to the last character.
+    # Once located on the bottom cell, use the down arrow key to prove the bottom cell is still selected. 
+    notebook.body.send_keys(Keys.DOWN)
+    notebook.body.send_keys(Keys.RIGHT)
+    notebook.body.send_keys(Keys.DOWN)
+    notebook.body.send_keys("2")
+    [notebook.body.send_keys(Keys.DOWN) for i in range(2)]
+    notebook.body.send_keys("3")
+    notebook.to_command_mode()
+    assert notebook.get_cells_contents() == ["0", "1", "2", "3"]

.venv/Lib/site-packages/notebook/tests/selenium/test_dualmode_cellmode.py

@@ -0,0 +1,58 @@
+"""Test keyboard shortcuts that change the cell's mode."""
+
+def test_dualmode_cellmode(notebook):
+    def get_cell_cm_mode(index):
+        code_mirror_mode = notebook.browser.execute_script(
+            "return Jupyter.notebook.get_cell(%s).code_mirror.getMode().name;"%index)
+        return code_mirror_mode
+    
+    
+    index = 0
+    a = 'hello\nmulti\nline'
+    
+    notebook.edit_cell(index=index, content=a)
+
+    """check for the default cell type"""
+    notebook.to_command_mode()
+    notebook.body.send_keys("r")
+    assert notebook.get_cell_type(index) == 'raw'
+    assert get_cell_cm_mode(index) == 'null'
+
+    """check cell type after changing to markdown"""
+    notebook.body.send_keys("1")
+    assert notebook.get_cell_type(index) == 'markdown'
+    assert notebook.get_cell_contents(index) == '# ' + a
+    assert get_cell_cm_mode(index) == 'ipythongfm'
+
+    notebook.body.send_keys("2")
+    assert notebook.get_cell_type(index) == 'markdown'
+    assert notebook.get_cell_contents(index) == '## ' + a
+    
+    notebook.body.send_keys("3")
+    assert notebook.get_cell_type(index) == 'markdown'
+    assert notebook.get_cell_contents(index) == '### ' + a
+
+    notebook.body.send_keys("4")
+    assert notebook.get_cell_type(index) == 'markdown'
+    assert notebook.get_cell_contents(index) == '#### ' + a
+
+    notebook.body.send_keys("5")
+    assert notebook.get_cell_type(index) == 'markdown'
+    assert notebook.get_cell_contents(index) == '##### ' + a
+
+    notebook.body.send_keys("6")
+    assert notebook.get_cell_type(index) == 'markdown'
+    assert notebook.get_cell_contents(index) == '###### ' + a
+
+    notebook.body.send_keys("m")
+    assert notebook.get_cell_type(index) == 'markdown'
+    assert notebook.get_cell_contents(index) == '###### ' + a
+
+    notebook.body.send_keys("y")
+    assert notebook.get_cell_type(index) == 'code'
+    assert notebook.get_cell_contents(index) == '###### ' + a
+    assert get_cell_cm_mode(index) == 'ipython'
+
+    notebook.body.send_keys("1")
+    assert notebook.get_cell_type(index) == 'markdown'
+    assert notebook.get_cell_contents(index) == '# ' + a

.venv/Lib/site-packages/notebook/tests/selenium/test_dualmode_clipboard.py

@@ -0,0 +1,54 @@
+"""Test"""
+from .utils import shift, validate_dualmode_state
+
+INITIAL_CELLS = ['', 'print("a")', 'print("b")', 'print("c")']
+
+def test_dualmode_clipboard(prefill_notebook):
+    notebook = prefill_notebook(INITIAL_CELLS)
+    _, a, b, c = INITIAL_CELLS
+    for i in range(1, 4):
+        notebook.execute_cell(i)
+
+    #Copy/past/cut
+    num_cells = len(notebook.cells)
+    assert notebook.get_cell_contents(1) == a #Cell 1 is a
+
+    notebook.focus_cell(1)
+    notebook.body.send_keys("x") #Cut
+    validate_dualmode_state(notebook, 'command', 1)
+    assert notebook.get_cell_contents(1) == b #Cell 2 is now where cell 1 was
+    assert len(notebook.cells) == num_cells-1 #A cell was removed
+
+    notebook.focus_cell(2)
+    notebook.body.send_keys("v") #Paste
+    validate_dualmode_state(notebook, 'command', 3)
+    assert notebook.get_cell_contents(3) == a #Cell 3 has the cut contents
+    assert len(notebook.cells) == num_cells   #A cell was added
+
+    notebook.body.send_keys("v") #Paste
+    validate_dualmode_state(notebook, 'command', 4)
+    assert notebook.get_cell_contents(4) == a #Cell a has the cut contents
+    assert len(notebook.cells) == num_cells+1 #A cell was added
+
+    notebook.focus_cell(1)
+    notebook.body.send_keys("c") #Copy
+    validate_dualmode_state(notebook, 'command', 1)
+    assert notebook.get_cell_contents(1) == b #Cell 1 is b
+
+    notebook.focus_cell(2)
+    notebook.body.send_keys("c") #Copy
+    validate_dualmode_state(notebook, 'command', 2)
+    assert notebook.get_cell_contents(2) == c #Cell 2 is c
+
+    notebook.focus_cell(4)
+    notebook.body.send_keys("v") #Paste
+    validate_dualmode_state(notebook, 'command', 5)
+    assert notebook.get_cell_contents(2) == c #Cell 2 has the copied contents
+    assert notebook.get_cell_contents(5) == c #Cell 5 has the copied contents
+    assert len(notebook.cells) == num_cells+2 #A cell was added
+
+    notebook.focus_cell(0)
+    shift(notebook.browser, 'v') #Paste
+    validate_dualmode_state(notebook, 'command', 0)
+    assert notebook.get_cell_contents(0) == c #Cell 0 has the copied contents
+    assert len(notebook.cells) == num_cells+3 #A cell was added

.venv/Lib/site-packages/notebook/tests/selenium/test_dualmode_execute.py

@@ -0,0 +1,74 @@
+''' Test keyboard invoked execution '''
+
+from selenium.webdriver.common.keys import Keys
+
+from .utils import shift, cmdtrl, alt, validate_dualmode_state
+
+INITIAL_CELLS = ['', 'print("a")', 'print("b")', 'print("c")']
+
+def test_dualmode_execute(prefill_notebook):
+    notebook = prefill_notebook(INITIAL_CELLS)
+    for i in range(1, 4):
+        notebook.execute_cell(i)
+
+    #shift-enter
+    #last cell in notebook
+    base_index = 3
+    notebook.focus_cell(base_index)
+    shift(notebook.browser, Keys.ENTER) #creates one cell
+    validate_dualmode_state(notebook, 'edit', base_index + 1)
+
+    #Not last cell in notebook & starts in edit mode
+    notebook.focus_cell(base_index)
+    notebook.body.send_keys(Keys.ENTER) #Enter edit mode
+    validate_dualmode_state(notebook, 'edit', base_index)
+    shift(notebook.browser, Keys.ENTER) #creates one cell
+    validate_dualmode_state(notebook, 'command', base_index + 1)
+
+    #Starts in command mode
+    notebook.body.send_keys('k')
+    validate_dualmode_state(notebook, 'command', base_index)
+    shift(notebook.browser, Keys.ENTER) #creates one cell
+    validate_dualmode_state(notebook, 'command', base_index + 1)
+
+
+    #Ctrl-enter
+    #Last cell in notebook
+    base_index += 1
+    cmdtrl(notebook.browser, Keys.ENTER)
+    validate_dualmode_state(notebook, 'command', base_index)
+
+    #Not last cell in notebook & stats in edit mode
+    notebook.focus_cell(base_index - 1)
+    notebook.body.send_keys(Keys.ENTER) #Enter edit mode
+    validate_dualmode_state(notebook, 'edit', base_index - 1)
+    cmdtrl(notebook.browser, Keys.ENTER)
+
+    #Starts in command mode
+    notebook.body.send_keys('j')
+    validate_dualmode_state(notebook, 'command', base_index)
+    cmdtrl(notebook.browser, Keys.ENTER)
+    validate_dualmode_state(notebook, 'command', base_index)
+
+
+    #Alt-enter
+    #Last cell in notebook
+    alt(notebook.browser, Keys.ENTER)
+    validate_dualmode_state(notebook, 'edit', base_index + 1)
+    #Not last cell in notebook &starts in edit mode
+    notebook.focus_cell(base_index)
+    notebook.body.send_keys(Keys.ENTER) #Enter edit mode
+    validate_dualmode_state(notebook, 'edit', base_index)
+    alt(notebook.browser, Keys.ENTER)
+    validate_dualmode_state(notebook, 'edit', base_index + 1)
+    #starts in command mode
+    notebook.body.send_keys(Keys.ESCAPE, 'k')
+    validate_dualmode_state(notebook, 'command', base_index)
+    alt(notebook.browser, Keys.ENTER)
+    validate_dualmode_state(notebook, 'edit', base_index + 1)
+
+
+    #Notebook will now have 8 cells, the index of the last cell will be 7
+    assert len(notebook) == 8 #Cells where added
+    notebook.focus_cell(7)
+    validate_dualmode_state(notebook, 'command', 7)

.venv/Lib/site-packages/notebook/tests/selenium/test_dualmode_insertcell.py

@@ -0,0 +1,51 @@
+from selenium.webdriver.common.keys import Keys
+from .utils import shift
+
+INITIAL_CELLS = ['print("a")', 'print("b")', 'print("c")']
+
+def test_insert_cell(prefill_notebook):
+    notebook = prefill_notebook(INITIAL_CELLS)
+
+    notebook.to_command_mode()
+    notebook.focus_cell(2)
+    notebook.convert_cell_type(2, "markdown")
+    
+    # insert code cell above
+    notebook.current_cell.send_keys("a")
+    assert notebook.get_cell_contents(2) == ""
+    assert notebook.get_cell_type(2) == "code"
+    assert len(notebook.cells) == 4
+    
+    # insert code cell below
+    notebook.current_cell.send_keys("b")
+    assert notebook.get_cell_contents(2) == ""
+    assert notebook.get_cell_contents(3) == ""
+    assert notebook.get_cell_type(3) == "code"
+    assert len(notebook.cells) == 5
+
+    notebook.edit_cell(index=1, content="cell1")
+    notebook.focus_cell(1)
+    notebook.current_cell.send_keys("a")
+    assert notebook.get_cell_contents(1) == ""
+    assert notebook.get_cell_contents(2) == "cell1"
+
+    notebook.edit_cell(index=1, content='cell1')
+    notebook.edit_cell(index=2, content='cell2')
+    notebook.edit_cell(index=3, content='cell3')
+    notebook.focus_cell(2)
+    notebook.current_cell.send_keys("b")
+    assert notebook.get_cell_contents(1) == "cell1"
+    assert notebook.get_cell_contents(2) == "cell2"
+    assert notebook.get_cell_contents(3) == ""
+    assert notebook.get_cell_contents(4) == "cell3"
+
+    # insert above multiple selected cells
+    notebook.focus_cell(1)
+    shift(notebook.browser, Keys.DOWN)
+    notebook.current_cell.send_keys('a')
+    
+    # insert below multiple selected cells
+    notebook.focus_cell(2)
+    shift(notebook.browser, Keys.DOWN)
+    notebook.current_cell.send_keys('b')
+    assert notebook.get_cells_contents()[1:5] == ["", "cell1", "cell2", ""]

.venv/Lib/site-packages/notebook/tests/selenium/test_dualmode_markdown.py

@@ -0,0 +1,53 @@
+'''Test'''
+
+from selenium.webdriver.common.keys import Keys
+
+from .utils import cmdtrl, shift, validate_dualmode_state
+
+def test_dualmode_markdown(notebook):
+    def is_cell_rendered(index):
+        JS = 'return !!IPython.notebook.get_cell(%s).rendered;'%index
+        return notebook.browser.execute_script(JS)
+
+
+    a = 'print("a")'
+    index = 1
+    notebook.append(a)
+
+    #Markdown rendering / unrendering
+    notebook.focus_cell(index)
+    validate_dualmode_state(notebook, 'command', index)
+    notebook.body.send_keys("m")
+    assert notebook.get_cell_type(index) == 'markdown'
+    assert not is_cell_rendered(index) #cell is not rendered
+    
+    notebook.body.send_keys(Keys.ENTER)#cell is unrendered
+    assert not is_cell_rendered(index) #cell is not rendered
+    validate_dualmode_state(notebook, 'edit', index)
+
+    cmdtrl(notebook.browser, Keys.ENTER)
+    assert is_cell_rendered(index) #cell is rendered with crtl+enter
+    validate_dualmode_state(notebook, 'command', index)
+
+    notebook.body.send_keys(Keys.ENTER)#cell is unrendered
+    assert not is_cell_rendered(index) #cell is not rendered
+
+    notebook.focus_cell(index - 1)
+    assert not is_cell_rendered(index) #Select index-1; cell index is still not rendered
+    validate_dualmode_state(notebook, 'command', index - 1)
+
+    notebook.focus_cell(index)
+    validate_dualmode_state(notebook, 'command', index)
+    cmdtrl(notebook.browser, Keys.ENTER)
+    assert is_cell_rendered(index)#Cell is rendered
+
+    notebook.focus_cell(index - 1)
+    validate_dualmode_state(notebook, 'command', index - 1)
+
+    shift(notebook.browser, Keys.ENTER)
+    validate_dualmode_state(notebook, 'command', index)
+    assert is_cell_rendered(index)#Cell is rendered
+
+    shift(notebook.browser, Keys.ENTER)
+    validate_dualmode_state(notebook, 'edit', index + 1)
+    assert is_cell_rendered(index)#Cell is rendered

.venv/Lib/site-packages/notebook/tests/selenium/test_execute_code.py

@@ -0,0 +1,66 @@
+from selenium.webdriver.common.keys import Keys
+from .utils import shift, cmdtrl
+
+
+def test_execute_code(notebook):
+    browser = notebook.browser
+    
+    def clear_outputs():
+        return notebook.browser.execute_script(
+            "Jupyter.notebook.clear_all_output();")
+
+    # Execute cell with Javascript API
+    notebook.edit_cell(index=0, content='a=10; print(a)')
+    browser.execute_script("Jupyter.notebook.get_cell(0).execute();")
+    outputs = notebook.wait_for_cell_output(0)
+    assert outputs[0].text == '10'
+
+    # Execute cell with Shift-Enter
+    notebook.edit_cell(index=0, content='a=11; print(a)')
+    clear_outputs()
+    shift(notebook.browser, Keys.ENTER)
+    outputs = notebook.wait_for_cell_output(0)
+    assert outputs[0].text == '11'
+    notebook.delete_cell(index=1)
+
+    # Execute cell with Ctrl-Enter
+    notebook.edit_cell(index=0, content='a=12; print(a)')
+    clear_outputs()
+    cmdtrl(notebook.browser, Keys.ENTER)
+    outputs = notebook.wait_for_cell_output(0)
+    assert outputs[0].text == '12'
+
+    # Execute cell with toolbar button
+    notebook.edit_cell(index=0, content='a=13; print(a)')
+    clear_outputs()
+    notebook.browser.find_element_by_css_selector(
+        "button[data-jupyter-action='jupyter-notebook:run-cell-and-select-next']").click()
+    outputs = notebook.wait_for_cell_output(0)
+    assert outputs[0].text == '13'
+
+    # Set up two cells to test stopping on error
+    notebook.edit_cell(index=0, content='raise IOError')
+    notebook.edit_cell(index=1, content='a=14; print(a)')
+
+    # Default behaviour: stop on error
+    clear_outputs()
+    browser.execute_script("""
+        var cell0 = Jupyter.notebook.get_cell(0);
+        var cell1 = Jupyter.notebook.get_cell(1);
+        cell0.execute();
+        cell1.execute();
+    """)
+    outputs = notebook.wait_for_cell_output(0)
+    assert notebook.get_cell_output(1) == []
+
+    # Execute a cell with stop_on_error=false
+    clear_outputs()
+    browser.execute_script("""
+            var cell0 = Jupyter.notebook.get_cell(0);
+            var cell1 = Jupyter.notebook.get_cell(1);
+            cell0.execute(false);
+            cell1.execute();
+        """)
+    outputs = notebook.wait_for_cell_output(1)
+    assert outputs[0].text == '14'
+

.venv/Lib/site-packages/notebook/tests/selenium/test_find_and_replace.py

@@ -0,0 +1,16 @@
+INITIAL_CELLS = ["hello", "hellohello", "abc", "ello"]
+
+def test_find_and_replace(prefill_notebook):
+    """ test find and replace on all the cells """
+    notebook = prefill_notebook(INITIAL_CELLS)
+
+    find_str = "ello"
+    replace_str = "foo"
+
+    # replace the strings
+    notebook.find_and_replace(index=0, find_txt=find_str, replace_txt=replace_str)
+
+    # check content of the cells
+    assert notebook.get_cells_contents() == [
+        s.replace(find_str, replace_str) for s in INITIAL_CELLS
+    ]

.venv/Lib/site-packages/notebook/tests/selenium/test_interrupt.py

@@ -0,0 +1,36 @@
+from .utils import wait_for_selector
+
+def interrupt_from_menu(notebook):
+    # Click interrupt button in kernel menu
+    notebook.browser.find_element_by_id('kernellink').click()
+    wait_for_selector(notebook.browser, '#int_kernel', single=True).click()
+
+def interrupt_from_keyboard(notebook):
+    notebook.body.send_keys("ii")
+
+
+def test_interrupt(notebook):
+    """ Test the interrupt function using both the button in the Kernel menu and the keyboard shortcut "ii"
+
+        Having trouble accessing the Interrupt message when execution is halted. I am assuming that the
+        message does not lie in the "outputs" field of the cell's JSON object. Using a timeout work-around for
+        test with an infinite loop. We know the interrupt function is working if this test passes.
+        Hope this is a good start.
+    """
+
+    text = ('import time\n'
+            'for x in range(3):\n'
+            '   time.sleep(1)')
+
+    notebook.edit_cell(index=0, content=text)
+
+    for interrupt_method in (interrupt_from_menu, interrupt_from_keyboard):
+        notebook.clear_cell_output(0)
+        notebook.to_command_mode()
+        notebook.execute_cell(0)
+
+        interrupt_method(notebook)
+
+        # Wait for an output to appear
+        output = wait_for_selector(notebook.browser, '.output_subarea', single=True)
+        assert 'KeyboardInterrupt' in output.text

.venv/Lib/site-packages/notebook/tests/selenium/test_kernel_menu.py

@@ -0,0 +1,59 @@
+from selenium.webdriver.common.by import By
+from selenium.webdriver.support import expected_conditions as EC
+from selenium.webdriver.support.ui import WebDriverWait
+from notebook.tests.selenium.utils import wait_for_selector
+
+restart_selectors = [
+    '#restart_kernel', '#restart_clear_output', '#restart_run_all'
+]
+notify_interaction = '#notification_kernel > span'
+
+shutdown_selector = '#shutdown_kernel'
+confirm_selector = '.btn-danger'
+cancel_selector = ".modal-footer button:first-of-type"
+
+
+def test_cancel_restart_or_shutdown(notebook):
+    """Click each of the restart options, then cancel the confirmation dialog"""
+    browser = notebook.browser
+    kernel_menu = browser.find_element_by_id('kernellink')
+
+    for menu_item in restart_selectors + [shutdown_selector]:
+        kernel_menu.click()
+        wait_for_selector(browser, menu_item, visible=True, single=True).click()
+        wait_for_selector(browser, cancel_selector, visible=True, single=True).click()
+        WebDriverWait(browser, 3).until(
+            EC.invisibility_of_element((By.CSS_SELECTOR, '.modal-backdrop'))
+        )
+        assert notebook.is_kernel_running()
+
+
+def test_menu_items(notebook):
+    browser = notebook.browser
+    kernel_menu = browser.find_element_by_id('kernellink')
+
+    for menu_item in restart_selectors:
+        # Shutdown
+        kernel_menu.click()
+        wait_for_selector(browser, shutdown_selector, visible=True, single=True).click()
+
+        # Confirm shutdown
+        wait_for_selector(browser, confirm_selector, visible=True, single=True).click()
+
+        WebDriverWait(browser, 3).until(
+            lambda b: not notebook.is_kernel_running(),
+            message="Kernel did not shut down as expected"
+        )
+
+        # Restart
+        # Selenium can't click the menu while a modal dialog is fading out
+        WebDriverWait(browser, 3).until(
+            EC.invisibility_of_element((By.CSS_SELECTOR, '.modal-backdrop'))
+        )
+        kernel_menu.click()
+
+        wait_for_selector(browser, menu_item, visible=True, single=True).click()
+        WebDriverWait(browser, 10).until(
+            lambda b: notebook.is_kernel_running(),
+            message=f"Restart ({menu_item!r}) after shutdown did not start kernel"
+        )

.venv/Lib/site-packages/notebook/tests/selenium/test_markdown.py

@@ -0,0 +1,41 @@
+from nbformat.v4 import new_markdown_cell
+
+def get_rendered_contents(nb):
+    cl = ["text_cell", "render"]
+    rendered_cells = [cell.find_element_by_class_name("text_cell_render") 
+                      for cell in nb.cells 
+                      if all([c in cell.get_attribute("class") for c in cl])]
+    return [x.get_attribute('innerHTML').strip()
+            for x in rendered_cells 
+            if x is not None]
+
+            
+def test_markdown_cell(prefill_notebook):
+    nb = prefill_notebook([new_markdown_cell(md) for md in [
+        '# Foo', '**Bar**', '*Baz*', '```\nx = 1\n```', '```aaaa\nx = 1\n```',
+        '```python\ns = "$"\nt = "$"\n```'
+    ]])
+
+    assert get_rendered_contents(nb) == [
+        '<h1 id="Foo">Foo<a class="anchor-link" href="#Foo">¶</a></h1>',
+        '<p><strong>Bar</strong></p>',
+        '<p><em>Baz</em></p>',
+        '<pre><code>x = 1</code></pre>',
+        '<pre><code class="cm-s-ipython language-aaaa">x = 1</code></pre>',
+        '<pre><code class="cm-s-ipython language-python">' + 
+        '<span class="cm-variable">s</span> <span class="cm-operator">=</span> <span class="cm-string">"$"</span>\n' +
+        '<span class="cm-variable">t</span> <span class="cm-operator">=</span> <span class="cm-string">"$"</span></code></pre>'
+    ]
+
+def test_markdown_headings(notebook):
+    lst = list([1, 2, 3, 4, 5, 6, 2, 1])
+    for i in lst:
+        notebook.add_markdown_cell()
+        cell_text = notebook.browser.execute_script(f"""
+            var cell = IPython.notebook.get_cell(1);
+            cell.set_heading_level({i});
+            cell.get_text();
+        """)
+        assert notebook.get_cell_contents(1) == "#" * i + " "
+        notebook.delete_cell(1)
+

.venv/Lib/site-packages/notebook/tests/selenium/test_merge_cells.py

@@ -0,0 +1,36 @@
+"""Tests the merge cell api."""
+
+INITIAL_CELLS = [
+    "foo = 5",
+    "bar = 10",
+    "baz = 15",
+    "print(foo)",
+    "print(bar)",
+    "print(baz)",
+]
+
+def test_merge_cells(prefill_notebook):
+    notebook = prefill_notebook(INITIAL_CELLS)
+    a, b, c, d, e, f = INITIAL_CELLS
+
+    # Before merging, there are 6 separate cells
+    assert notebook.get_cells_contents() == [a, b, c, d, e, f]
+
+    # Focus on the second cell and merge it with the cell above
+    notebook.focus_cell(1)
+    notebook.browser.execute_script("Jupyter.notebook.merge_cell_above();")
+    merged_a_b = f"{a}\n\n{b}"
+    assert notebook.get_cells_contents() == [merged_a_b, c, d, e, f]
+
+    # Focus on the second cell and merge it with the cell below
+    notebook.focus_cell(1)
+    notebook.browser.execute_script("Jupyter.notebook.merge_cell_below();")
+    merged_c_d = f"{c}\n\n{d}"
+    assert notebook.get_cells_contents() == [merged_a_b, merged_c_d, e, f]
+
+    # Merge everything down to a single cell with selected cells
+    notebook.select_cell_range(0,3)
+    notebook.browser.execute_script("Jupyter.notebook.merge_selected_cells();")
+    merged_all = f"{merged_a_b}\n\n{merged_c_d}\n\n{e}\n\n{f}"
+    assert notebook.get_cells_contents() == [merged_all]
+

.venv/Lib/site-packages/notebook/tests/selenium/test_move_multiselection.py

@@ -0,0 +1,47 @@
+INITIAL_CELLS = ['1', '2', '3', '4', '5', '6']
+def test_move_multiselection(prefill_notebook):
+    notebook = prefill_notebook(INITIAL_CELLS)
+    def assert_oder(pre_message, expected_state):
+        for i in range(len(expected_state)):
+            assert expected_state[i] == notebook.get_cell_contents(i), f"{pre_message}: Verify that cell {i} has for content: {expected_state[i]} found: {notebook.get_cell_contents(i)}"
+    
+    # Select 3 first cells
+    notebook.select_cell_range(0, 2)
+    notebook.browser.execute_script(
+        "Jupyter.notebook.move_selection_up();"   
+    )
+    # Should not move up at top
+    assert_oder('move up at top', ['1', '2', '3', '4', '5','6'])
+
+    # We do not need to reselect, move/up down should keep the selection.
+    notebook.browser.execute_script(
+        "Jupyter.notebook.move_selection_down();"
+    )
+    notebook.browser.execute_script(
+        "Jupyter.notebook.move_selection_down();"
+    )
+    notebook.browser.execute_script(
+        "Jupyter.notebook.move_selection_down();"
+    )
+    
+    # 3 times down should move the 3 selected cells to the bottom
+    assert_oder("move down to bottom", ['4', '5', '6', '1', '2', '3'])
+    notebook.browser.execute_script(
+        "Jupyter.notebook.move_selection_down();"
+    )
+
+    # They can't go any futher
+    assert_oder("move down to bottom", ['4', '5', '6', '1', '2', '3'])
+
+    notebook.browser.execute_script(
+        "Jupyter.notebook.move_selection_up();"   
+    )
+    notebook.browser.execute_script(
+        "Jupyter.notebook.move_selection_up();"   
+    )
+    notebook.browser.execute_script(
+        "Jupyter.notebook.move_selection_up();"   
+    )
+
+    # Bring them back on top
+    assert_oder('move up at top', ['1', '2', '3', '4', '5','6'])

.venv/Lib/site-packages/notebook/tests/selenium/test_multiselect.py

@@ -0,0 +1,63 @@
+INITIAL_CELLS = ['print("a")', 'print("b")', 'print("c")']
+
+def test_multiselect(prefill_notebook):
+    notebook = prefill_notebook(INITIAL_CELLS)
+
+    def extend_selection_by(delta):
+        notebook.browser.execute_script(
+            "Jupyter.notebook.extend_selection_by(arguments[0]);", delta)
+
+    def n_selected_cells():
+        return notebook.browser.execute_script(
+            "return Jupyter.notebook.get_selected_cells().length;")
+
+    notebook.focus_cell(0)
+    assert n_selected_cells() == 1
+
+    # Check that only one cell is selected according to CSS classes as well
+    selected_css = notebook.browser.find_elements_by_css_selector(
+        '.cell.jupyter-soft-selected, .cell.selected')
+    assert len(selected_css) == 1
+
+    # Extend the selection down one
+    extend_selection_by(1)
+    assert n_selected_cells() == 2
+
+    # Contract the selection up one
+    extend_selection_by(-1)
+    assert n_selected_cells() == 1
+
+    # Extend the selection up one
+    notebook.focus_cell(1)
+    extend_selection_by(-1)
+    assert n_selected_cells() == 2
+
+    # Convert selected cells to Markdown
+    notebook.browser.execute_script("Jupyter.notebook.cells_to_markdown();")
+    cell_types = notebook.browser.execute_script(
+        "return Jupyter.notebook.get_cells().map(c => c.cell_type)")
+    assert cell_types == ['markdown', 'markdown', 'code']
+    # One cell left selected after conversion
+    assert n_selected_cells() == 1
+
+    # Convert selected cells to raw
+    notebook.focus_cell(1)
+    extend_selection_by(1)
+    assert n_selected_cells() == 2
+    notebook.browser.execute_script("Jupyter.notebook.cells_to_raw();")
+    cell_types = notebook.browser.execute_script(
+        "return Jupyter.notebook.get_cells().map(c => c.cell_type)")
+    assert cell_types == ['markdown', 'raw', 'raw']
+    # One cell left selected after conversion
+    assert n_selected_cells() == 1
+
+    # Convert selected cells to code
+    notebook.focus_cell(0)
+    extend_selection_by(2)
+    assert n_selected_cells() == 3
+    notebook.browser.execute_script("Jupyter.notebook.cells_to_code();")
+    cell_types = notebook.browser.execute_script(
+        "return Jupyter.notebook.get_cells().map(c => c.cell_type)")
+    assert cell_types == ['code'] * 3
+    # One cell left selected after conversion
+    assert n_selected_cells() == 1

.venv/Lib/site-packages/notebook/tests/selenium/test_multiselect_toggle.py

@@ -0,0 +1,43 @@
+INITIAL_CELLS = ['print("a")', 'print("b")', 'print("c")']
+def test_multiselect_toggle(prefill_notebook):
+    notebook = prefill_notebook(INITIAL_CELLS)
+    def extend_selection_by(delta):
+        notebook.browser.execute_script(
+            "Jupyter.notebook.extend_selection_by(arguments[0]);", delta)
+
+    def n_selected_cells():
+        return notebook.browser.execute_script(
+            "return Jupyter.notebook.get_selected_cells().length;")
+
+    def select_cells():
+        notebook.focus_cell(0)
+        extend_selection_by(2)
+
+    # Test that cells, which start off not collapsed, are collapsed after
+    # calling the multiselected cell toggle.
+    select_cells()
+    assert n_selected_cells() == 3
+    notebook.browser.execute_script("Jupyter.notebook.execute_selected_cells();")
+    select_cells()
+    notebook.browser.execute_script("Jupyter.notebook.toggle_cells_outputs();")
+    cell_output_states = notebook.browser.execute_script(
+        "return Jupyter.notebook.get_cells().map(c => c.collapsed)")
+    assert cell_output_states == [False] * 3, "ensure that all cells are not collapsed"
+
+    # Test that cells, which start off not scrolled are scrolled after
+    # calling the multiselected scroll toggle.
+    select_cells()
+    assert n_selected_cells() == 3
+    notebook.browser.execute_script("Jupyter.notebook.toggle_cells_outputs_scroll();")
+    cell_scrolled_states = notebook.browser.execute_script(
+        "return Jupyter.notebook.get_cells().map(c => c.output_area.scroll_state)")
+    assert all(cell_scrolled_states), "ensure that all have scrolling enabled"
+
+    # Test that cells, which start off not cleared are cleared after
+    # calling the multiselected scroll toggle.
+    select_cells()
+    assert n_selected_cells() == 3
+    notebook.browser.execute_script("Jupyter.notebook.clear_cells_outputs();")
+    cell_outputs_cleared = notebook.browser.execute_script(
+        "return Jupyter.notebook.get_cells().map(c => c.output_area.element.html())")
+    assert cell_outputs_cleared == [""] * 3, "ensure that all cells are cleared"

.venv/Lib/site-packages/notebook/tests/selenium/test_notifications.py

@@ -0,0 +1,103 @@
+"""
+Test the notification area and widgets
+"""
+import pytest
+
+from .utils import wait_for_selector, wait_for_script_to_return_true
+
+
+def get_widget(notebook, name):
+    return notebook.browser.execute_script(
+        f"return IPython.notification_area.get_widget('{name}') !== undefined"
+    )
+
+
+def widget(notebook, name):
+    return notebook.browser.execute_script(
+        f"return IPython.notification_area.widget('{name}') !== undefined"
+    )
+
+
+def new_notification_widget(notebook, name):
+    return notebook.browser.execute_script(
+        f"return IPython.notification_area.new_notification_widget('{name}') !== undefined"
+    )
+
+
+def widget_has_class(notebook, name, class_name):
+    return notebook.browser.execute_script(
+        f"""
+        var w = IPython.notification_area.get_widget('{name}');
+        return w.element.hasClass('{class_name}');
+        """
+    )
+
+
+def widget_message(notebook, name):
+    return notebook.browser.execute_script(
+        f"""
+        var w = IPython.notification_area.get_widget('{name}');
+        return w.get_message();
+        """
+    )
+
+
+def test_notification(notebook):
+    # check that existing widgets are there
+    assert get_widget(notebook, "kernel") and widget(notebook, "kernel"),\
+        "The kernel notification widget exists"
+    assert get_widget(notebook, "notebook") and widget(notebook, "notebook"),\
+        "The notebook notification widget exists"
+
+    # try getting a non-existent widget
+    with pytest.raises(Exception):
+        get_widget(notebook, "foo")
+
+    # try creating a non-existent widget
+    assert widget(notebook, "bar"), "widget: new widget is created"
+
+    # try creating a widget that already exists
+    with pytest.raises(Exception):
+        new_notification_widget(notebook, "kernel")
+
+    # test creating 'info', 'warning' and 'danger' messages
+    for level in ("info", "warning", "danger"):
+        notebook.browser.execute_script(f"""
+            var tnw = IPython.notification_area.widget('test');
+            tnw.{level}('test {level}');
+        """)
+        wait_for_selector(notebook.browser, "#notification_test", visible=True)
+
+        assert widget_has_class(notebook, "test", level), f"{level}: class is correct"
+        assert widget_message(notebook, "test") == f"test {level}", f"{level}: message is correct"
+
+    # test message timeout
+    notebook.browser.execute_script("""
+        var tnw = IPython.notification_area.widget('test');
+        tnw.set_message('test timeout', 1000);
+        """)
+    wait_for_selector(notebook.browser, "#notification_test", visible=True)
+
+    assert widget_message(notebook, "test") == "test timeout", "timeout: message is correct"
+    wait_for_selector(notebook.browser, "#notification_test", obscures=True)
+    assert widget_message(notebook, "test") == "", "timeout: message was cleared"
+
+    # test click callback
+    notebook.browser.execute_script("""
+        var tnw = IPython.notification_area.widget('test');
+        tnw._clicked = false;
+        tnw.set_message('test click', undefined, function () {
+            tnw._clicked = true;
+            return true;
+        });
+        """)
+    wait_for_selector(notebook.browser, "#notification_test", visible=True)
+
+    assert widget_message(notebook, "test") == "test click", "callback: message is correct"
+
+    notebook.browser.find_element_by_id("notification_test").click()
+    wait_for_script_to_return_true(notebook.browser,
+                                   'return IPython.notification_area.widget("test")._clicked;')
+    wait_for_selector(notebook.browser, "#notification_test", obscures=True)
+
+    assert widget_message(notebook, "test") == "", "callback: message was cleared"

.venv/Lib/site-packages/notebook/tests/selenium/test_prompt_numbers.py

@@ -0,0 +1,29 @@
+def test_prompt_numbers(prefill_notebook):
+    notebook = prefill_notebook(['print("a")'])
+
+    def get_prompt():
+        return (
+            notebook.cells[0].find_element_by_class_name('input')
+            .find_element_by_class_name('input_prompt')
+            .get_attribute('innerHTML').strip()
+        )
+
+    def set_prompt(value):
+        notebook.set_cell_input_prompt(0, value)
+
+    assert get_prompt() == "<bdi>In</bdi>&nbsp;[&nbsp;]:"
+
+    set_prompt(2)
+    assert get_prompt() == "<bdi>In</bdi>&nbsp;[2]:"
+
+    set_prompt(0)
+    assert get_prompt() == "<bdi>In</bdi>&nbsp;[0]:"
+
+    set_prompt("'*'")
+    assert get_prompt() == "<bdi>In</bdi>&nbsp;[*]:"
+
+    set_prompt("undefined")
+    assert get_prompt() == "<bdi>In</bdi>&nbsp;[&nbsp;]:"
+
+    set_prompt("null")
+    assert get_prompt() == "<bdi>In</bdi>&nbsp;[&nbsp;]:"

.venv/Lib/site-packages/notebook/tests/selenium/test_save.py

@@ -0,0 +1,64 @@
+"""Test saving a notebook with escaped characters
+"""
+
+from urllib.parse import quote
+from .utils import wait_for_selector
+
+promise_js = """
+var done = arguments[arguments.length - 1];
+%s.then(
+    data => { done(["success", data]); },
+    error => { done(["error", error]); }
+);
+"""
+
+def execute_promise(js, browser):
+    state, data = browser.execute_async_script(promise_js % js)
+    if state == 'success':
+        return data
+    raise Exception(data)
+
+
+def test_save(notebook):
+    # don't use unicode with ambiguous composed/decomposed normalization
+    # because the filesystem may use a different normalization than literals.
+    # This causes no actual problems, but will break string comparison.
+    nbname = "has#hash and space and unicø∂e.ipynb"
+    escaped_name = quote(nbname)
+
+    notebook.edit_cell(index=0, content="s = '??'")
+
+    notebook.browser.execute_script("Jupyter.notebook.set_notebook_name(arguments[0])", nbname)
+
+    model = execute_promise("Jupyter.notebook.save_notebook()", notebook.browser)
+    assert model['name'] == nbname
+
+    current_name = notebook.browser.execute_script("return Jupyter.notebook.notebook_name")
+    assert current_name == nbname
+
+    current_path = notebook.browser.execute_script("return Jupyter.notebook.notebook_path")
+    assert current_path == nbname
+
+    displayed_name = notebook.browser.find_element_by_id('notebook_name').text
+    assert displayed_name + '.ipynb' == nbname
+
+    execute_promise("Jupyter.notebook.save_checkpoint()", notebook.browser)
+
+    checkpoints = notebook.browser.execute_script("return Jupyter.notebook.checkpoints")
+    assert len(checkpoints) == 1
+
+    notebook.browser.find_element_by_css_selector('#ipython_notebook a').click()
+    hrefs_nonmatch = []
+    for link in wait_for_selector(notebook.browser, 'a.item_link'):
+        href = link.get_attribute('href')
+        if escaped_name in href:
+            print("Opening", href)
+            notebook.browser.get(href)
+            wait_for_selector(notebook.browser, '.cell')
+            break
+        hrefs_nonmatch.append(href)
+    else:
+        raise AssertionError(f"{escaped_name!r} not found in {hrefs_nonmatch!r}")
+
+    current_name = notebook.browser.execute_script("return Jupyter.notebook.notebook_name")
+    assert current_name == nbname

.venv/Lib/site-packages/notebook/tests/selenium/test_save_as_notebook.py

@@ -0,0 +1,40 @@
+from notebook.tests.selenium.utils import wait_for_selector
+from selenium.webdriver.common.keys import Keys
+from selenium.webdriver.support.ui import WebDriverWait
+
+def wait_for_rename(browser, nbname, timeout=10):
+    wait = WebDriverWait(browser, timeout)
+    def notebook_renamed(browser):
+        elem = browser.find_element_by_id('notebook_name')
+        current_name = browser.execute_script('return arguments[0].innerText', elem)
+        return current_name == nbname
+    return wait.until(notebook_renamed)
+
+def save_as(nb):
+    JS = 'Jupyter.notebook.save_notebook_as()'
+    return nb.browser.execute_script(JS)
+
+def get_notebook_name(nb):
+    JS = 'return Jupyter.notebook.notebook_name'
+    return nb.browser.execute_script(JS)
+
+def set_notebook_name(nb, name):
+    JS = f'Jupyter.notebook.rename("{name}")'
+    nb.browser.execute_script(JS)
+
+def test_save_notebook_as(notebook):
+    # Set a name for comparison later
+    set_notebook_name(notebook, name="nb1.ipynb")
+    wait_for_rename(notebook.browser, "nb1")
+    assert get_notebook_name(notebook) == "nb1.ipynb"
+    # Wait for Save As modal, save
+    save_as(notebook)
+    wait_for_selector(notebook.browser, '.save-message')
+    inp = notebook.browser.find_element_by_xpath('//input[@data-testid="save-as"]')
+    inp.send_keys('new_notebook.ipynb')
+    inp.send_keys(Keys.RETURN)
+    wait_for_rename(notebook.browser, "new_notebook")
+    # Test that the name changed
+    assert get_notebook_name(notebook) == "new_notebook.ipynb"
+    # Test that address bar was updated (TODO: get the base url)
+    assert "new_notebook.ipynb" in notebook.browser.current_url

.venv/Lib/site-packages/notebook/tests/selenium/test_save_readonly_as.py

@@ -0,0 +1,80 @@
+from notebook.tests.selenium.utils import wait_for_selector
+from selenium.webdriver.common.keys import Keys
+from selenium.webdriver.support.ui import WebDriverWait
+
+
+promise_js = """
+var done = arguments[arguments.length - 1];
+(%s).then(
+    data => { done(["success", data]); },
+    error => { done(["error", error]); }
+);
+"""
+
+def execute_promise(js, browser):
+    state, data = browser.execute_async_script(promise_js % js)
+    if state == 'success':
+        return data
+    raise Exception(data)
+
+def wait_for_rename(browser, nbname, timeout=10):
+    wait = WebDriverWait(browser, timeout)
+    def notebook_renamed(browser):
+        elem = browser.find_element_by_id('notebook_name')
+        current_name = browser.execute_script('return arguments[0].innerText', elem)
+        return current_name == nbname
+    return wait.until(notebook_renamed)
+
+def save_as(nb):
+    JS = 'Jupyter.notebook.save_notebook_as()'
+    return nb.browser.execute_script(JS)
+
+def get_notebook_name(nb):
+    JS = 'return Jupyter.notebook.notebook_name'
+    return nb.browser.execute_script(JS)
+
+def refresh_notebook(nb):
+    nb.browser.refresh()
+    nb.__init__(nb.browser)
+
+def test_save_readonly_notebook_as(notebook):
+    # Make notebook read-only
+    notebook.edit_cell(index=0, content='import os\nimport stat\nos.chmod("'
+        + notebook.browser.current_url.split('?')[0].split('/')[-1] + '", stat.S_IREAD)\nprint(0)')
+    notebook.browser.execute_script("Jupyter.notebook.get_cell(0).execute();")
+    notebook.wait_for_cell_output(0)
+    refresh_notebook(notebook)
+    # Test that the notebook is read-only
+    assert notebook.browser.execute_script('return Jupyter.notebook.writable') == False
+
+    # Add some content
+    test_content_0 = "print('a simple')\nprint('test script')"
+    notebook.edit_cell(index=0, content=test_content_0)
+
+    # Wait for Save As modal, save
+    save_as(notebook)
+    wait_for_selector(notebook.browser, '.save-message')
+    inp = notebook.browser.find_element_by_xpath('//input[@data-testid="save-as"]')
+    inp.send_keys('writable_notebook.ipynb')
+    inp.send_keys(Keys.RETURN)
+    wait_for_rename(notebook.browser, "writable_notebook")
+    # Test that the name changed
+    assert get_notebook_name(notebook) == "writable_notebook.ipynb"
+    # Test that address bar was updated (TODO: get the base url)
+    assert "writable_notebook.ipynb" in notebook.browser.current_url
+    # Test that it is no longer read-only
+    assert notebook.browser.execute_script('return Jupyter.notebook.writable') == True
+
+    # Add some more content
+    test_content_1 = "print('a second simple')\nprint('script to test save feature')"
+    notebook.add_and_execute_cell(content=test_content_1)
+    # and save the notebook
+    execute_promise("Jupyter.notebook.save_notebook()", notebook.browser)
+    
+    # Test that it still contains the content
+    assert notebook.get_cell_contents(index=0) == test_content_0
+    assert notebook.get_cell_contents(index=1) == test_content_1
+    # even after a refresh 
+    refresh_notebook(notebook)
+    assert notebook.get_cell_contents(index=0) == test_content_0
+    assert notebook.get_cell_contents(index=1) == test_content_1

.venv/Lib/site-packages/notebook/tests/selenium/test_shutdown.py

@@ -0,0 +1,15 @@
+"""Tests shutdown of the Kernel."""
+from .utils import wait_for_selector, wait_for_xpath
+
+def test_shutdown(notebook):
+    notebook.edit_cell(content="print(21)")
+    wait_for_xpath(notebook.browser, '//a[text()="Kernel"]', single=True).click()
+    wait_for_selector(notebook.browser, '#shutdown_kernel', single=True).click()
+    wait_for_selector(notebook.browser, '.btn.btn-default.btn-sm.btn-danger', single=True).click()
+
+    #Wait until all shutdown modal elements disappear before trying to execute the cell
+    wait_for_xpath(notebook.browser, "//div[contains(@class,'modal')]", obscures=True)
+    notebook.execute_cell(0)
+
+    assert not notebook.is_kernel_running()
+    assert len(notebook.get_cell_output()) == 0

.venv/Lib/site-packages/notebook/tests/selenium/test_undelete.py

@@ -0,0 +1,92 @@
+from selenium.webdriver.common.keys import Keys
+from .utils import shift
+
+def undelete(nb):
+    nb.browser.execute_script('Jupyter.notebook.undelete_cell();')
+
+INITIAL_CELLS = ['print("a")', 'print("b")', 'print("c")', 'print("d")']
+
+def test_undelete_cells(prefill_notebook):
+    notebook = prefill_notebook(INITIAL_CELLS)
+    a, b, c, d = INITIAL_CELLS
+
+    # Verify initial state
+    assert notebook.get_cells_contents() == [a, b, c, d]
+
+    # Delete cells [1, 2]
+    notebook.focus_cell(1)
+    shift(notebook.browser, Keys.DOWN)
+    notebook.current_cell.send_keys('dd')
+    assert notebook.get_cells_contents() == [a, d]
+
+    # Delete new cell 1 (which contains d)
+    notebook.focus_cell(1)
+    notebook.current_cell.send_keys('dd')
+    assert notebook.get_cells_contents() == [a]
+
+    # Undelete d
+    undelete(notebook)
+    assert notebook.get_cells_contents() == [a, d]
+
+    # Undelete b, c
+    undelete(notebook)
+    assert notebook.get_cells_contents() == [a, b, c, d]
+
+    # Nothing more to undelete
+    undelete(notebook)
+    assert notebook.get_cells_contents() == [a, b, c, d]
+
+    # Delete first two cells and restore
+    notebook.focus_cell(0)
+    shift(notebook.browser, Keys.DOWN)
+    notebook.current_cell.send_keys('dd')
+    assert notebook.get_cells_contents() == [c, d]
+    undelete(notebook)
+    assert notebook.get_cells_contents() == [a, b, c, d]
+
+    # Delete last two cells and restore
+    notebook.focus_cell(-1)
+    shift(notebook.browser, Keys.UP)
+    notebook.current_cell.send_keys('dd')
+    assert notebook.get_cells_contents() == [a, b]
+    undelete(notebook)
+    assert notebook.get_cells_contents() == [a, b, c, d]
+
+    # Merge cells [1, 2], restore the deleted one
+    bc = b + "\n\n" + c
+    notebook.focus_cell(1)
+    shift(notebook.browser, 'j')
+    shift(notebook.browser, 'm')
+    assert notebook.get_cells_contents() == [a, bc, d]
+    undelete(notebook)
+    assert notebook.get_cells_contents() == [a, bc, c, d]
+
+    # Merge cells [2, 3], restore the deleted one
+    cd = c + "\n\n" + d
+    notebook.focus_cell(-1)
+    shift(notebook.browser, 'k')
+    shift(notebook.browser, 'm')
+    assert notebook.get_cells_contents() == [a, bc, cd]
+    undelete(notebook)
+    assert notebook.get_cells_contents() == [a, bc, cd, d]
+
+    # Reset contents to [a, b, c, d] --------------------------------------
+    notebook.edit_cell(index=1, content=b)
+    notebook.edit_cell(index=2, content=c)
+    assert notebook.get_cells_contents() == [a, b, c, d]
+
+    # Merge cell below, restore the deleted one
+    ab = a + "\n\n" + b
+    notebook.focus_cell(0)
+    notebook.browser.execute_script("Jupyter.notebook.merge_cell_below();")
+    assert notebook.get_cells_contents() == [ab, c, d]
+    undelete(notebook)
+    assert notebook.get_cells_contents() == [ab, b, c, d]
+
+    # Merge cell above, restore the deleted one
+    cd = c + "\n\n" + d
+    notebook.focus_cell(-1)
+    notebook.browser.execute_script("Jupyter.notebook.merge_cell_above();")
+    assert notebook.get_cells_contents() == [ab, b, cd]
+    undelete(notebook)
+    assert notebook.get_cells_contents() == [ab, b, c, cd]

.venv/Lib/site-packages/notebook/tests/selenium/utils.py

@@ -0,0 +1,468 @@
+import os
+from selenium.webdriver import ActionChains
+from selenium.webdriver.common.by import By
+from selenium.webdriver.common.keys import Keys
+from selenium.webdriver.support.ui import WebDriverWait
+from selenium.webdriver.support import expected_conditions as EC
+from selenium.webdriver.remote.webelement import WebElement
+
+from contextlib import contextmanager
+
+pjoin = os.path.join
+
+
+def wait_for_selector(driver, selector, timeout=10, visible=False, single=False, wait_for_n=1, obscures=False):
+    if wait_for_n > 1:
+        return _wait_for_multiple(
+            driver, By.CSS_SELECTOR, selector, timeout, wait_for_n, visible)
+    return _wait_for(driver, By.CSS_SELECTOR, selector, timeout, visible, single, obscures)
+
+
+def wait_for_tag(driver, tag, timeout=10, visible=False, single=False, wait_for_n=1, obscures=False):
+    if wait_for_n > 1:
+        return _wait_for_multiple(
+            driver, By.TAG_NAME, tag, timeout, wait_for_n, visible)
+    return _wait_for(driver, By.TAG_NAME, tag, timeout, visible, single, obscures)
+
+
+def wait_for_xpath(driver, xpath, timeout=10, visible=False, single=False, wait_for_n=1, obscures=False):
+    if wait_for_n > 1:
+        return _wait_for_multiple(
+            driver, By.XPATH, xpath, timeout, wait_for_n, visible)
+    return _wait_for(driver, By.XPATH, xpath, timeout, visible, single, obscures)
+
+
+def wait_for_script_to_return_true(driver, script, timeout=10):
+    WebDriverWait(driver, timeout).until(lambda d: d.execute_script(script))
+
+
+def _wait_for(driver, locator_type, locator, timeout=10, visible=False, single=False, obscures=False):
+    """Waits `timeout` seconds for the specified condition to be met. Condition is
+    met if any matching element is found. Returns located element(s) when found.
+
+    Args:
+        driver: Selenium web driver instance
+        locator_type: type of locator (e.g. By.CSS_SELECTOR or By.TAG_NAME)
+        locator: name of tag, class, etc. to wait for
+        timeout: how long to wait for presence/visibility of element
+        visible: if True, require that element is not only present, but visible
+        single: if True, return a single element, otherwise return a list of matching
+        elements
+        obscures: if True, waits until the element becomes invisible
+    """
+    wait = WebDriverWait(driver, timeout)
+    if obscures:
+        conditional = EC.invisibility_of_element_located
+    elif single:
+        if visible:
+            conditional = EC.visibility_of_element_located
+        else:
+            conditional = EC.presence_of_element_located
+    else:
+        if visible:
+            conditional = EC.visibility_of_all_elements_located
+        else:
+            conditional = EC.presence_of_all_elements_located
+    return wait.until(conditional((locator_type, locator)))
+
+
+def _wait_for_multiple(driver, locator_type, locator, timeout, wait_for_n, visible=False):
+    """Waits until `wait_for_n` matching elements to be present (or visible).
+    Returns located elements when found.
+
+    Args:
+        driver: Selenium web driver instance
+        locator_type: type of locator (e.g. By.CSS_SELECTOR or By.TAG_NAME)
+        locator: name of tag, class, etc. to wait for
+        timeout: how long to wait for presence/visibility of element
+        wait_for_n: wait until this number of matching elements are present/visible
+        visible: if True, require that elements are not only present, but visible
+    """
+    wait = WebDriverWait(driver, timeout)
+
+    def multiple_found(driver):
+        elements = driver.find_elements(locator_type, locator)
+        if visible:
+            elements = [e for e in elements if e.is_displayed()]
+        if len(elements) < wait_for_n:
+            return False
+        return elements
+
+    return wait.until(multiple_found)
+
+
+class CellTypeError(ValueError):
+
+    def __init__(self, message=""):
+        self.message = message
+
+
+class Notebook:
+
+    def __init__(self, browser):
+        self.browser = browser
+        self._wait_for_start()
+        self.disable_autosave_and_onbeforeunload()
+
+    def __len__(self):
+        return len(self.cells)
+
+    def __getitem__(self, key):
+        return self.cells[key]
+
+    def __setitem__(self, key, item):
+        if isinstance(key, int):
+            self.edit_cell(index=key, content=item, render=False)
+        # TODO: re-add slicing support, handle general python slicing behaviour
+        # includes: overwriting the entire self.cells object if you do
+        # self[:] = []
+        # elif isinstance(key, slice):
+        #     indices = (self.index(cell) for cell in self[key])
+        #     for k, v in zip(indices, item):
+        #         self.edit_cell(index=k, content=v, render=False)
+
+    def __iter__(self):
+        return (cell for cell in self.cells)
+
+    def _wait_for_start(self):
+        """Wait until the notebook interface is loaded and the kernel started"""
+        wait_for_selector(self.browser, '.cell')
+        WebDriverWait(self.browser, 10).until(
+            lambda drvr: self.is_kernel_running()
+        )
+
+    @property
+    def body(self):
+        return self.browser.find_element_by_tag_name("body")
+
+    @property
+    def cells(self):
+        """Gets all cells once they are visible.
+
+        """
+        return self.browser.find_elements_by_class_name("cell")
+
+    @property
+    def current_index(self):
+        return self.index(self.current_cell)
+
+    def index(self, cell):
+        return self.cells.index(cell)
+
+    def disable_autosave_and_onbeforeunload(self):
+        """Disable request to save before closing window and autosave.
+
+        This is most easily done by using js directly.
+        """
+        self.browser.execute_script("window.onbeforeunload = null;")
+        self.browser.execute_script("Jupyter.notebook.set_autosave_interval(0)")
+
+    def to_command_mode(self):
+        """Changes us into command mode on currently focused cell
+
+        """
+        self.body.send_keys(Keys.ESCAPE)
+        self.browser.execute_script("return Jupyter.notebook.handle_command_mode("
+                                       "Jupyter.notebook.get_cell("
+                                           "Jupyter.notebook.get_edit_index()))")
+
+    def focus_cell(self, index=0):
+        cell = self.cells[index]
+        cell.click()
+        self.to_command_mode()
+        self.current_cell = cell
+
+    def select_cell_range(self, initial_index=0, final_index=0):
+        self.focus_cell(initial_index)
+        self.to_command_mode()
+        for i in range(final_index - initial_index):
+            shift(self.browser, 'j')
+
+    def find_and_replace(self, index=0, find_txt='', replace_txt=''):
+        self.focus_cell(index)
+        self.to_command_mode()
+        self.body.send_keys('f')
+        wait_for_selector(self.browser, "#find-and-replace", single=True)
+        self.browser.find_element_by_id("findreplace_allcells_btn").click()
+        self.browser.find_element_by_id("findreplace_find_inp").send_keys(find_txt)
+        self.browser.find_element_by_id("findreplace_replace_inp").send_keys(replace_txt)
+        self.browser.find_element_by_id("findreplace_replaceall_btn").click()
+
+    def convert_cell_type(self, index=0, cell_type="code"):
+        # TODO add check to see if it is already present
+        self.focus_cell(index)
+        cell = self.cells[index]
+        if cell_type == "markdown":
+            self.current_cell.send_keys("m")
+        elif cell_type == "raw":
+            self.current_cell.send_keys("r")
+        elif cell_type == "code":
+            self.current_cell.send_keys("y")
+        else:
+            raise CellTypeError(f"{cell_type} is not a valid cell type,use 'code', 'markdown', or 'raw'")
+
+        self.wait_for_stale_cell(cell)
+        self.focus_cell(index)
+        return self.current_cell
+
+    def wait_for_stale_cell(self, cell):
+        """ This is needed to switch a cell's mode and refocus it, or to render it.
+
+        Warning: there is currently no way to do this when changing between
+        markdown and raw cells.
+        """
+        wait = WebDriverWait(self.browser, 10)
+        element = wait.until(EC.staleness_of(cell))
+
+    def wait_for_element_availability(self, element):
+        _wait_for(self.browser, By.CLASS_NAME, element, visible=True)
+
+    def get_cells_contents(self):
+        JS = 'return Jupyter.notebook.get_cells().map(function(c) {return c.get_text();})'
+        return self.browser.execute_script(JS)
+
+    def get_cell_contents(self, index=0, selector='div .CodeMirror-code'):
+        return self.cells[index].find_element_by_css_selector(selector).text
+
+    def get_cell_output(self, index=0, output='output_subarea'):
+        return self.cells[index].find_elements_by_class_name(output)
+
+    def wait_for_cell_output(self, index=0, timeout=10):
+        return WebDriverWait(self.browser, timeout).until(
+            lambda b: self.get_cell_output(index)
+        )
+
+    def set_cell_metadata(self, index, key, value):
+        JS = f'Jupyter.notebook.get_cell({index}).metadata.{key} = {value}'
+        return self.browser.execute_script(JS)
+
+    def get_cell_type(self, index=0):
+        JS = f'return Jupyter.notebook.get_cell({index}).cell_type'
+        return self.browser.execute_script(JS)
+
+    def set_cell_input_prompt(self, index, prmpt_val):
+        JS = f'Jupyter.notebook.get_cell({index}).set_input_prompt({prmpt_val})'
+        self.browser.execute_script(JS)
+
+    def edit_cell(self, cell=None, index=0, content="", render=False):
+        """Set the contents of a cell to *content*, by cell object or by index
+        """
+        if cell is not None:
+            index = self.index(cell)
+        self.focus_cell(index)
+
+        # Select & delete anything already in the cell
+        self.current_cell.send_keys(Keys.ENTER)
+        cmdtrl(self.browser, 'a')
+        self.current_cell.send_keys(Keys.DELETE)
+
+        for line_no, line in enumerate(content.splitlines()):
+            if line_no != 0:
+                self.current_cell.send_keys(Keys.ENTER, "\n")
+            self.current_cell.send_keys(Keys.ENTER, line)
+        if render:
+            self.execute_cell(self.current_index)
+
+    def execute_cell(self, cell_or_index=None):
+        if isinstance(cell_or_index, int):
+            index = cell_or_index
+        elif isinstance(cell_or_index, WebElement):
+            index = self.index(cell_or_index)
+        else:
+            raise TypeError("execute_cell only accepts a WebElement or an int")
+        self.focus_cell(index)
+        self.current_cell.send_keys(Keys.CONTROL, Keys.ENTER)
+
+    def add_cell(self, index=-1, cell_type="code", content=""):
+        self.focus_cell(index)
+        self.current_cell.send_keys("b")
+        new_index = index + 1 if index >= 0 else index
+        if content:
+            self.edit_cell(index=index, content=content)
+        if cell_type != 'code':
+            self.convert_cell_type(index=new_index, cell_type=cell_type)
+
+    def add_and_execute_cell(self, index=-1, cell_type="code", content=""):
+        self.add_cell(index=index, cell_type=cell_type, content=content)
+        self.execute_cell(index)
+
+    def delete_cell(self, index):
+        self.focus_cell(index)
+        self.to_command_mode()
+        self.current_cell.send_keys('dd')
+
+    def add_markdown_cell(self, index=-1, content="", render=True):
+        self.add_cell(index, cell_type="markdown")
+        self.edit_cell(index=index, content=content, render=render)
+
+    def append(self, *values, cell_type="code"):
+        for i, value in enumerate(values):
+            if isinstance(value, str):
+                self.add_cell(cell_type=cell_type,
+                              content=value)
+            else:
+                raise TypeError(f"Don't know how to add cell from {value!r}")
+
+    def extend(self, values):
+        self.append(*values)
+
+    def run_all(self):
+        for cell in self:
+            self.execute_cell(cell)
+
+    def trigger_keydown(self, keys):
+        trigger_keystrokes(self.body, keys)
+
+    def is_kernel_running(self):
+        return self.browser.execute_script(
+            "return Jupyter.notebook.kernel && Jupyter.notebook.kernel.is_connected()"
+        )
+
+    def clear_cell_output(self, index):
+        JS = f'Jupyter.notebook.clear_output({index})'
+        self.browser.execute_script(JS)
+
+    @classmethod
+    def new_notebook(cls, browser, kernel_name='kernel-python3'):
+        with new_window(browser):
+            select_kernel(browser, kernel_name=kernel_name)
+        return cls(browser)
+
+
+def select_kernel(browser, kernel_name='kernel-python3'):
+    """Clicks the "new" button and selects a kernel from the options.
+    """
+    wait = WebDriverWait(browser, 10)
+    new_button = wait.until(EC.element_to_be_clickable((By.ID, "new-dropdown-button")))
+    new_button.click()
+    kernel_selector = f'#{kernel_name} a'
+    kernel = wait_for_selector(browser, kernel_selector, single=True)
+    kernel.click()
+
+
+@contextmanager
+def new_window(browser):
+    """Contextmanager for switching to & waiting for a window created.
+
+    This context manager gives you the ability to create a new window inside
+    the created context and it will switch you to that new window.
+
+    Usage example:
+
+        from notebook.tests.selenium.utils import new_window, Notebook
+
+        ⋮ # something that creates a browser object
+
+        with new_window(browser):
+            select_kernel(browser, kernel_name=kernel_name)
+        nb = Notebook(browser)
+
+    """
+    initial_window_handles = browser.window_handles
+    yield
+    new_window_handles = [window for window in browser.window_handles
+                          if window not in initial_window_handles]
+    if not new_window_handles:
+        raise Exception("No new windows opened during context")
+    browser.switch_to.window(new_window_handles[0])
+
+def shift(browser, k):
+    """Send key combination Shift+(k)"""
+    trigger_keystrokes(browser, "shift-%s"%k)
+
+def cmdtrl(browser, k):
+    """Send key combination Ctrl+(k) or Command+(k) for MacOS"""
+    trigger_keystrokes(browser, "command-%s"%k) if os.uname()[0] == "Darwin" else trigger_keystrokes(browser, "control-%s"%k)
+
+def alt(browser, k):
+    """Send key combination Alt+(k)"""
+    trigger_keystrokes(browser, 'alt-%s'%k)
+
+def trigger_keystrokes(browser, *keys):
+    """ Send the keys in sequence to the browser.
+    Handles following key combinations
+    1. with modifiers eg. 'control-alt-a', 'shift-c'
+    2. just modifiers eg. 'alt', 'esc'
+    3. non-modifiers eg. 'abc'
+    Modifiers : http://seleniumhq.github.io/selenium/docs/api/py/webdriver/selenium.webdriver.common.keys.html
+    """
+    for each_key_combination in keys:
+        keys = each_key_combination.split('-')
+        if len(keys) > 1:  # key has modifiers eg. control, alt, shift
+            modifiers_keys = [getattr(Keys, x.upper()) for x in keys[:-1]]
+            ac = ActionChains(browser)
+            for i in modifiers_keys: ac = ac.key_down(i)
+            ac.send_keys(keys[-1])
+            for i in modifiers_keys[::-1]: ac = ac.key_up(i)
+            ac.perform()
+        else:              # single key stroke. Check if modifier eg. "up"
+            browser.send_keys(getattr(Keys, keys[0].upper(), keys[0]))
+
+def validate_dualmode_state(notebook, mode, index):
+    '''Validate the entire dual mode state of the notebook.
+    Checks if the specified cell is selected, and the mode and keyboard mode are the same.
+    Depending on the mode given:
+        Command: Checks that no cells are in focus or in edit mode.
+        Edit:    Checks that only the specified cell is in focus and in edit mode.
+    '''
+    def is_only_cell_edit(index):
+        JS = 'return Jupyter.notebook.get_cells().map(function(c) {return c.mode;})'
+        cells_mode = notebook.browser.execute_script(JS)
+        #None of the cells are in edit mode
+        if index is None:
+            for mode in cells_mode:
+                if mode == 'edit':
+                    return False
+            return True
+        #Only the index cell is on edit mode
+        for i, mode in enumerate(cells_mode):
+            if i == index:
+                if mode != 'edit':
+                    return False
+            else:
+                if mode == 'edit':
+                    return False
+        return True
+
+    def is_focused_on(index):
+        JS = "return $('#notebook .CodeMirror-focused textarea').length;"
+        focused_cells = notebook.browser.execute_script(JS)
+        if index is None:
+            return focused_cells == 0
+
+        if focused_cells != 1: #only one cell is focused
+            return False
+
+        JS = "return $('#notebook .CodeMirror-focused textarea')[0];"
+        focused_cell = notebook.browser.execute_script(JS)
+        JS = "return IPython.notebook.get_cell(%s).code_mirror.getInputField()"%index
+        cell = notebook.browser.execute_script(JS)
+        return focused_cell == cell
+
+
+    #general test
+    JS = "return IPython.keyboard_manager.mode;"
+    keyboard_mode = notebook.browser.execute_script(JS)
+    JS = "return IPython.notebook.mode;"
+    notebook_mode = notebook.browser.execute_script(JS)
+
+    #validate selected cell
+    JS = "return Jupyter.notebook.get_selected_cells_indices();"
+    cell_index = notebook.browser.execute_script(JS)
+    assert cell_index == [index] #only the index cell is selected
+
+    if mode != 'command' and mode != 'edit':
+        raise Exception('An unknown mode was send: mode = "%s"'%mode) #An unknown mode is send
+
+    #validate mode
+    assert mode == keyboard_mode #keyboard mode is correct
+
+    if mode == 'command':
+        assert is_focused_on(None) #no focused cells
+
+        assert is_only_cell_edit(None) #no cells in edit mode
+
+    elif mode == 'edit':
+        assert is_focused_on(index) #The specified cell is focused
+
+        assert is_only_cell_edit(index) #The specified cell is the only one in edit mode