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.venv/Lib/site-packages/nbconvert/exporters/tests/test_rst.py

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+"""Tests for RSTExporter"""
+
+# Copyright (c) IPython Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+import re
+
+import nbformat
+from nbformat import v4
+
+from ...tests.utils import onlyif_cmds_exist
+from ..rst import RSTExporter
+from .base import ExportersTestsBase
+
+
+class TestRSTExporter(ExportersTestsBase):
+    """Tests for RSTExporter"""
+
+    exporter_class = RSTExporter
+    should_include_raw = ["rst"]
+
+    def test_constructor(self):
+        """
+        Can a RSTExporter be constructed?
+        """
+        RSTExporter()
+
+    @onlyif_cmds_exist("pandoc")
+    def test_export(self):
+        """
+        Can a RSTExporter export something?
+        """
+        (output, resources) = RSTExporter().from_filename(self._get_notebook())
+        assert len(output) > 0
+
+    @onlyif_cmds_exist("pandoc")
+    def test_empty_code_cell(self):
+        """No empty code cells in rst"""
+        nbname = self._get_notebook()
+        with open(nbname, encoding="utf8") as f:
+            nb = nbformat.read(f, 4)
+
+        exporter = self.exporter_class()
+
+        (output, resources) = exporter.from_notebook_node(nb)
+        # add an empty code cell
+        nb.cells.append(v4.new_code_cell(source=""))
+        (output2, resources) = exporter.from_notebook_node(nb)
+        # adding an empty code cell shouldn't change output
+        self.assertEqual(output.strip(), output2.strip())
+
+    @onlyif_cmds_exist("pandoc")
+    def test_png_metadata(self):
+        """
+        Does RSTExporter treat pngs with width/height metadata correctly?
+        """
+        (output, resources) = RSTExporter().from_filename(
+            self._get_notebook(nb_name="pngmetadata.ipynb")
+        )
+        assert len(output) > 0
+        check_for_png = re.compile(r".. image::.*?\n\s+(.*?)\n\s*\n", re.DOTALL)
+        result = check_for_png.search(output)
+        assert result is not None
+        attr_string = result.group(1)
+        assert ":width:" in attr_string
+        assert ":height:" in attr_string
+        assert "px" in attr_string