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

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+"""Tests for notebook.py"""
+
+# Copyright (c) IPython Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+import json
+
+from nbformat import validate
+
+from nbconvert.tests.base import assert_big_text_equal
+
+from ..notebook import NotebookExporter
+from .base import ExportersTestsBase
+
+
+class TestNotebookExporter(ExportersTestsBase):
+    """Contains test functions for notebook.py"""
+
+    exporter_class = NotebookExporter
+
+    def test_export(self):
+        """
+        Does the NotebookExporter return the file unchanged?
+        """
+        with open(self._get_notebook()) as f:
+            file_contents = f.read()
+        (output, resources) = self.exporter_class().from_filename(self._get_notebook())
+        assert len(output) > 0
+        assert_big_text_equal(output, file_contents)
+
+    def test_downgrade_3(self):
+        exporter = self.exporter_class(nbformat_version=3)
+        (output, resources) = exporter.from_filename(self._get_notebook())
+        nb = json.loads(output)
+        validate(nb)
+
+    def test_downgrade_2(self):
+        exporter = self.exporter_class(nbformat_version=2)
+        (output, resources) = exporter.from_filename(self._get_notebook())
+        nb = json.loads(output)
+        self.assertEqual(nb["nbformat"], 2)