Stop Click from crashing Black on invalid environments

[etc/vim.git] / tests / test_black.py

diff --git a/tests/test_black.py b/tests/test_black.py
index b8af711d384272e4fb1aca9bde6772c9691fe68f..191f4b8cd40638bedcadcb4b26a6769403725f6c 100644 (file)
--- a/tests/test_black.py
+++ b/tests/test_black.py
@@ -11,7 +11,7 @@ import sys
 from tempfile import TemporaryDirectory
 from typing import Any, BinaryIO, Generator, List, Tuple, Iterator
 import unittest
-from unittest.mock import patch
+from unittest.mock import patch, MagicMock
 
 from click import unstyle
 from click.testing import CliRunner
@@ -400,6 +400,14 @@ class BlackTestCase(unittest.TestCase):
         black.assert_equivalent(source, actual)
         black.assert_stable(source, actual, line_length=ll)
 
+    @patch("black.dump_to_file", dump_to_stderr)
+    def test_fmtonoff2(self) -> None:
+        source, expected = read_data("fmtonoff2")
+        actual = fs(source)
+        self.assertFormatEqual(expected, actual)
+        black.assert_equivalent(source, actual)
+        black.assert_stable(source, actual, line_length=ll)
+
     @patch("black.dump_to_file", dump_to_stderr)
     def test_remove_empty_parentheses_after_class(self) -> None:
         source, expected = read_data("class_blank_parentheses")
@@ -1162,6 +1170,71 @@ class BlackTestCase(unittest.TestCase):
         with self.assertRaises(AssertionError):
             black.assert_equivalent("{}", "None")
 
+    def test_symlink_out_of_root_directory(self) -> None:
+        # prepare argumens
+        path = MagicMock()
+        root = THIS_DIR
+        child = MagicMock()
+        include = re.compile(black.DEFAULT_INCLUDES)
+        exclude = re.compile(black.DEFAULT_EXCLUDES)
+        report = black.Report()
+
+        # set the behavior of mock arguments
+        # child should behave like a symlink which resolved path is clearly
+        # outside of the root directory
+        path.iterdir.return_value = [child]
+        child.resolve.return_value = Path("/a/b/c")
+        child.is_symlink.return_value = True
+
+        # call the method
+        # it should not raise any error
+        list(black.gen_python_files_in_dir(path, root, include, exclude, report))
+
+        # check the call of the methods of the mock objects
+        path.iterdir.assert_called_once()
+        child.resolve.assert_called_once()
+        child.is_symlink.assert_called_once()
+
+        # set the behavior of mock arguments
+        # child should behave like a strange file which resolved path is clearly
+        # outside of the root directory
+        child.is_symlink.return_value = False
+
+        # call the method
+        # it should raise a ValueError
+        with self.assertRaises(ValueError):
+            list(black.gen_python_files_in_dir(path, root, include, exclude, report))
+
+        # check the call of the methods of the mock objects
+        path.iterdir.assert_called()
+        self.assertEqual(path.iterdir.call_count, 2)
+        child.resolve.assert_called()
+        self.assertEqual(child.resolve.call_count, 2)
+        child.is_symlink.assert_called()
+        self.assertEqual(child.is_symlink.call_count, 2)
+
+    def test_shhh_click(self) -> None:
+        try:
+            from click import _unicodefun  # type: ignore
+        except ModuleNotFoundError:
+            self.skipTest("Incompatible Click version")
+        if not hasattr(_unicodefun, "_verify_python3_env"):
+            self.skipTest("Incompatible Click version")
+        # First, let's see if Click is crashing with a preferred ASCII charset.
+        with patch("locale.getpreferredencoding") as gpe:
+            gpe.return_value = "ASCII"
+            with self.assertRaises(RuntimeError):
+                _unicodefun._verify_python3_env()
+        # Now, let's silence Click...
+        black.patch_click()
+        # ...and confirm it's silent.
+        with patch("locale.getpreferredencoding") as gpe:
+            gpe.return_value = "ASCII"
+            try:
+                _unicodefun._verify_python3_env()
+            except RuntimeError as re:
+                self.fail(f"`patch_click()` failed, exception still raised: {re}")
+
 
 if __name__ == "__main__":
-    unittest.main()
+    unittest.main(module="test_black")