Handle ImportError from multiprocessing module (#1400)

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

diff --git a/tests/test_black.py b/tests/test_black.py
index 11bba1fea0759089a6caf9c9d56000c765362b9e..1b574c012edfcd963535c349af271d2e06299959 100644 (file)
--- a/tests/test_black.py
+++ b/tests/test_black.py
@@ -35,6 +35,7 @@ ff = partial(black.format_file_in_place, mode=black.FileMode(), fast=True)
 fs = partial(black.format_str, mode=black.FileMode())
 THIS_FILE = Path(__file__)
 THIS_DIR = THIS_FILE.parent
+PROJECT_ROOT = THIS_DIR.parent
 DETERMINISTIC_HEADER = "[Deterministic header]"
 EMPTY_LINE = "# EMPTY LINE WITH WHITESPACE" + " (this comment will be removed)"
 PY36_ARGS = [
@@ -54,7 +55,7 @@ def read_data(name: str, data: bool = True) -> Tuple[str, str]:
         name += ".py"
     _input: List[str] = []
     _output: List[str] = []
-    base_dir = THIS_DIR / "data" if data else THIS_DIR
+    base_dir = THIS_DIR / "data" if data else PROJECT_ROOT
     with open(base_dir / name, "r", encoding="utf8") as test:
         lines = test.readlines()
     result = _input
@@ -82,7 +83,7 @@ def cache_dir(exists: bool = True) -> Iterator[Path]:
 
 
 @contextmanager
-def event_loop(close: bool) -> Iterator[None]:
+def event_loop() -> Iterator[None]:
     policy = asyncio.get_event_loop_policy()
     loop = policy.new_event_loop()
     asyncio.set_event_loop(loop)
@@ -90,8 +91,7 @@ def event_loop(close: bool) -> Iterator[None]:
         yield
 
     finally:
-        if close:
-            loop.close()
+        loop.close()
 
 
 @contextmanager
@@ -157,9 +157,18 @@ class BlackTestCase(unittest.TestCase):
     ) -> None:
         runner = BlackRunner()
         if ignore_config:
-            args = ["--config", str(THIS_DIR / "empty.toml"), *args]
+            args = ["--verbose", "--config", str(THIS_DIR / "empty.toml"), *args]
         result = runner.invoke(black.main, args)
-        self.assertEqual(result.exit_code, exit_code, msg=runner.stderr_bytes.decode())
+        self.assertEqual(
+            result.exit_code,
+            exit_code,
+            msg=(
+                f"Failed with args: {args}\n"
+                f"stdout: {runner.stdout_bytes.decode()!r}\n"
+                f"stderr: {runner.stderr_bytes.decode()!r}\n"
+                f"exception: {result.exception}"
+            ),
+        )
 
     @patch("black.dump_to_file", dump_to_stderr)
     def checkSourceFile(self, name: str) -> None:
@@ -194,43 +203,43 @@ class BlackTestCase(unittest.TestCase):
         self.checkSourceFile("tests/test_black.py")
 
     def test_black(self) -> None:
-        self.checkSourceFile("black.py")
+        self.checkSourceFile("src/black/__init__.py")
 
     def test_pygram(self) -> None:
-        self.checkSourceFile("blib2to3/pygram.py")
+        self.checkSourceFile("src/blib2to3/pygram.py")
 
     def test_pytree(self) -> None:
-        self.checkSourceFile("blib2to3/pytree.py")
+        self.checkSourceFile("src/blib2to3/pytree.py")
 
     def test_conv(self) -> None:
-        self.checkSourceFile("blib2to3/pgen2/conv.py")
+        self.checkSourceFile("src/blib2to3/pgen2/conv.py")
 
     def test_driver(self) -> None:
-        self.checkSourceFile("blib2to3/pgen2/driver.py")
+        self.checkSourceFile("src/blib2to3/pgen2/driver.py")
 
     def test_grammar(self) -> None:
-        self.checkSourceFile("blib2to3/pgen2/grammar.py")
+        self.checkSourceFile("src/blib2to3/pgen2/grammar.py")
 
     def test_literals(self) -> None:
-        self.checkSourceFile("blib2to3/pgen2/literals.py")
+        self.checkSourceFile("src/blib2to3/pgen2/literals.py")
 
     def test_parse(self) -> None:
-        self.checkSourceFile("blib2to3/pgen2/parse.py")
+        self.checkSourceFile("src/blib2to3/pgen2/parse.py")
 
     def test_pgen(self) -> None:
-        self.checkSourceFile("blib2to3/pgen2/pgen.py")
+        self.checkSourceFile("src/blib2to3/pgen2/pgen.py")
 
     def test_tokenize(self) -> None:
-        self.checkSourceFile("blib2to3/pgen2/tokenize.py")
+        self.checkSourceFile("src/blib2to3/pgen2/tokenize.py")
 
     def test_token(self) -> None:
-        self.checkSourceFile("blib2to3/pgen2/token.py")
+        self.checkSourceFile("src/blib2to3/pgen2/token.py")
 
     def test_setup(self) -> None:
         self.checkSourceFile("setup.py")
 
     def test_piping(self) -> None:
-        source, expected = read_data("../black", data=False)
+        source, expected = read_data("src/black/__init__", data=False)
         result = BlackRunner().invoke(
             black.main,
             ["-", "--fast", f"--line-length={black.DEFAULT_LINE_LENGTH}"],
@@ -1251,7 +1260,7 @@ class BlackTestCase(unittest.TestCase):
             with src.open("r") as fobj:
                 self.assertEqual(fobj.read(), "print('hello')")
 
-    @event_loop(close=False)
+    @event_loop()
     def test_cache_multiple_files(self) -> None:
         mode = black.FileMode()
         with cache_dir() as workspace, patch(
@@ -1331,7 +1340,7 @@ class BlackTestCase(unittest.TestCase):
             black.write_cache({}, [], mode)
             self.assertTrue(workspace.exists())
 
-    @event_loop(close=False)
+    @event_loop()
     def test_failed_formatting_does_not_get_cached(self) -> None:
         mode = black.FileMode()
         with cache_dir() as workspace, patch(
@@ -1354,7 +1363,18 @@ class BlackTestCase(unittest.TestCase):
             mock.side_effect = OSError
             black.write_cache({}, [], mode)
 
-    @event_loop(close=False)
+    @event_loop()
+    @patch("black.ProcessPoolExecutor", MagicMock(side_effect=OSError))
+    def test_works_in_mono_process_only_environment(self) -> None:
+        with cache_dir() as workspace:
+            for f in [
+                (workspace / "one.py").resolve(),
+                (workspace / "two.py").resolve(),
+            ]:
+                f.write_text('print("hello")\n')
+            self.invokeBlack([str(workspace)])
+
+    @event_loop()
     def test_check_diff_use_together(self) -> None:
         with cache_dir():
             # Files which will be reformatted.
@@ -1417,7 +1437,7 @@ class BlackTestCase(unittest.TestCase):
             self.assertNotIn(path, normal_cache)
         self.assertEqual(actual, expected)
 
-    @event_loop(close=False)
+    @event_loop()
     def test_multi_file_force_pyi(self) -> None:
         reg_mode = black.FileMode()
         pyi_mode = black.FileMode(is_pyi=True)
@@ -1469,7 +1489,7 @@ class BlackTestCase(unittest.TestCase):
             self.assertNotIn(path, normal_cache)
         self.assertEqual(actual, expected)
 
-    @event_loop(close=False)
+    @event_loop()
     def test_multi_file_force_py36(self) -> None:
         reg_mode = black.FileMode()
         py36_mode = black.FileMode(target_versions=black.PY36_VERSIONS)
@@ -1525,8 +1545,8 @@ class BlackTestCase(unittest.TestCase):
         ]
         this_abs = THIS_DIR.resolve()
         sources.extend(
-            black.gen_python_files_in_dir(
-                path, this_abs, include, exclude, report, gitignore
+            black.gen_python_files(
+                path.iterdir(), this_abs, include, [exclude], report, gitignore
             )
         )
         self.assertEqual(sorted(expected), sorted(sources))
@@ -1546,8 +1566,8 @@ class BlackTestCase(unittest.TestCase):
         ]
         this_abs = THIS_DIR.resolve()
         sources.extend(
-            black.gen_python_files_in_dir(
-                path, this_abs, include, exclude, report, gitignore
+            black.gen_python_files(
+                path.iterdir(), this_abs, include, [exclude], report, gitignore
             )
         )
         self.assertEqual(sorted(expected), sorted(sources))
@@ -1571,11 +1591,11 @@ class BlackTestCase(unittest.TestCase):
         ]
         this_abs = THIS_DIR.resolve()
         sources.extend(
-            black.gen_python_files_in_dir(
-                path,
+            black.gen_python_files(
+                path.iterdir(),
                 this_abs,
                 empty,
-                re.compile(black.DEFAULT_EXCLUDES),
+                [re.compile(black.DEFAULT_EXCLUDES)],
                 report,
                 gitignore,
             )
@@ -1598,11 +1618,11 @@ class BlackTestCase(unittest.TestCase):
         ]
         this_abs = THIS_DIR.resolve()
         sources.extend(
-            black.gen_python_files_in_dir(
-                path,
+            black.gen_python_files(
+                path.iterdir(),
                 this_abs,
                 re.compile(black.DEFAULT_INCLUDES),
-                empty,
+                [empty],
                 report,
                 gitignore,
             )
@@ -1644,7 +1664,7 @@ class BlackTestCase(unittest.TestCase):
 
     def test_symlink_out_of_root_directory(self) -> None:
         path = MagicMock()
-        root = THIS_DIR
+        root = THIS_DIR.resolve()
         child = MagicMock()
         include = re.compile(black.DEFAULT_INCLUDES)
         exclude = re.compile(black.DEFAULT_EXCLUDES)
@@ -1658,8 +1678,8 @@ class BlackTestCase(unittest.TestCase):
         child.is_symlink.return_value = True
         try:
             list(
-                black.gen_python_files_in_dir(
-                    path, root, include, exclude, report, gitignore
+                black.gen_python_files(
+                    path.iterdir(), root, include, exclude, report, gitignore
                 )
             )
         except ValueError as ve:
@@ -1672,8 +1692,8 @@ class BlackTestCase(unittest.TestCase):
         child.is_symlink.return_value = False
         with self.assertRaises(ValueError):
             list(
-                black.gen_python_files_in_dir(
-                    path, root, include, exclude, report, gitignore
+                black.gen_python_files(
+                    path.iterdir(), root, include, exclude, report, gitignore
                 )
             )
         path.iterdir.assert_called()