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add FAQ entry about undetected syntax errors (#2645)
[etc/vim.git] / tests / test_no_ipynb.py
1 import pytest
2 import os
3
4 from tests.util import THIS_DIR
5 from black import main, jupyter_dependencies_are_installed
6 from click.testing import CliRunner
7 from _pytest.tmpdir import tmpdir
8
9 pytestmark = pytest.mark.no_jupyter
10
11 runner = CliRunner()
12
13
14 def test_ipynb_diff_with_no_change_single() -> None:
15     jupyter_dependencies_are_installed.cache_clear()
16     path = THIS_DIR / "data/notebook_trailing_newline.ipynb"
17     result = runner.invoke(main, [str(path)])
18     expected_output = (
19         "Skipping .ipynb files as Jupyter dependencies are not installed.\n"
20         "You can fix this by running ``pip install black[jupyter]``\n"
21     )
22     assert expected_output in result.output
23
24
25 def test_ipynb_diff_with_no_change_dir(tmpdir: tmpdir) -> None:
26     jupyter_dependencies_are_installed.cache_clear()
27     runner = CliRunner()
28     nb = os.path.join("tests", "data", "notebook_trailing_newline.ipynb")
29     tmp_nb = tmpdir / "notebook.ipynb"
30     with open(nb) as src, open(tmp_nb, "w") as dst:
31         dst.write(src.read())
32     result = runner.invoke(main, [str(tmpdir)])
33     expected_output = (
34         "Skipping .ipynb files as Jupyter dependencies are not installed.\n"
35         "You can fix this by running ``pip install black[jupyter]``\n"
36     )
37     assert expected_output in result.output