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

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+"""Tests for the latex preprocessor"""
+
+# Copyright (c) IPython Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+from unittest.mock import patch
+
+import pytest
+
+from ..webpdf import WebPDFExporter
+from .base import ExportersTestsBase
+
+
+class TestWebPDFExporter(ExportersTestsBase):
+    """Contains test functions for webpdf.py"""
+
+    exporter_class = WebPDFExporter
+
+    @pytest.mark.network
+    def test_export(self):
+        """
+        Can a TemplateExporter export something?
+        """
+        (output, resources) = WebPDFExporter(allow_chromium_download=True).from_filename(
+            self._get_notebook()
+        )
+        assert len(output) > 0
+
+    @patch("pyppeteer.util.check_chromium", return_value=False)
+    def test_webpdf_without_chromium(self, mock_check_chromium):
+        """
+        Generate PDFs if chromium not present?
+        """
+        with pytest.raises(RuntimeError):
+            WebPDFExporter(allow_chromium_download=False).from_filename(self._get_notebook())
+
+    def test_webpdf_without_pyppeteer(self):
+        """
+        Generate PDFs if chromium not present?
+        """
+        with pytest.raises(RuntimeError):
+            exporter = WebPDFExporter()
+            with open(self._get_notebook(), encoding="utf-8") as f:
+                nb = exporter.from_file(f, resources={})
+                # Have to do this as the very last action as traitlets do dynamic importing often
+                with patch("builtins.__import__", side_effect=ModuleNotFoundError("Fake missing")):
+                    exporter.from_notebook_node(nb)