List the Python extension for VS Code as an editor integration (#308)

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

diff --git a/tests/test_black.py b/tests/test_black.py
index adf5ede63715fd4d58f0c624eb99385e3db6a5a5..e98f019e6808335e5176040e19cd8fcb945b64c0 100644 (file)
--- a/tests/test_black.py
+++ b/tests/test_black.py
@@ -3,21 +3,22 @@ import asyncio
 from concurrent.futures import ThreadPoolExecutor
 from contextlib import contextmanager
 from functools import partial
 from concurrent.futures import ThreadPoolExecutor
 from contextlib import contextmanager
 from functools import partial

-from io import StringIO
+from io import BytesIO, TextIOWrapper

 import os
 from pathlib import Path
 import os
 from pathlib import Path

+import re

 import sys
 from tempfile import TemporaryDirectory
 from typing import Any, List, Tuple, Iterator
 import unittest
 from unittest.mock import patch
 import sys
 from tempfile import TemporaryDirectory
 from typing import Any, List, Tuple, Iterator
 import unittest
 from unittest.mock import patch

-import re

 
 from click import unstyle
 from click.testing import CliRunner
 
 import black
 
 
 from click import unstyle
 from click.testing import CliRunner
 
 import black
 

+

 ll = 88
 ff = partial(black.format_file_in_place, line_length=ll, fast=True)
 fs = partial(black.format_str, line_length=ll)
 ll = 88
 ff = partial(black.format_file_in_place, line_length=ll, fast=True)
 fs = partial(black.format_str, line_length=ll)


@@ -99,6 +100,25 @@ class BlackTestCase(unittest.TestCase):
                 black.err(str(ve))
         self.assertEqual(expected, actual)
 
                 black.err(str(ve))
         self.assertEqual(expected, actual)
 

+    @patch("black.dump_to_file", dump_to_stderr)
+    def test_empty(self) -> None:
+        source = expected = ""
+        actual = fs(source)
+        self.assertFormatEqual(expected, actual)
+        black.assert_equivalent(source, actual)
+        black.assert_stable(source, actual, line_length=ll)
+
+    def test_empty_ff(self) -> None:
+        expected = ""
+        tmp_file = Path(black.dump_to_file())
+        try:
+            self.assertFalse(ff(tmp_file, write_back=black.WriteBack.YES))
+            with open(tmp_file, encoding="utf8") as f:
+                actual = f.read()
+        finally:
+            os.unlink(tmp_file)
+        self.assertFormatEqual(expected, actual)
+

     @patch("black.dump_to_file", dump_to_stderr)
     def test_self(self) -> None:
         source, expected = read_data("test_black")
     @patch("black.dump_to_file", dump_to_stderr)
     def test_self(self) -> None:
         source, expected = read_data("test_black")


@@ -121,8 +141,9 @@ class BlackTestCase(unittest.TestCase):
         source, expected = read_data("../black")
         hold_stdin, hold_stdout = sys.stdin, sys.stdout
         try:
         source, expected = read_data("../black")
         hold_stdin, hold_stdout = sys.stdin, sys.stdout
         try:

-            sys.stdin, sys.stdout = StringIO(source), StringIO()
-            sys.stdin.name = "<stdin>"
+            sys.stdin = TextIOWrapper(BytesIO(source.encode("utf8")), encoding="utf8")
+            sys.stdout = TextIOWrapper(BytesIO(), encoding="utf8")
+            sys.stdin.buffer.name = "<stdin>"  # type: ignore

             black.format_stdin_to_stdout(
                 line_length=ll, fast=True, write_back=black.WriteBack.YES
             )
             black.format_stdin_to_stdout(
                 line_length=ll, fast=True, write_back=black.WriteBack.YES
             )


@@ -135,17 +156,22 @@ class BlackTestCase(unittest.TestCase):
         black.assert_stable(source, actual, line_length=ll)
 
     def test_piping_diff(self) -> None:
         black.assert_stable(source, actual, line_length=ll)
 
     def test_piping_diff(self) -> None:

+        diff_header = re.compile(
+            rf"(STDIN|STDOUT)\t\d\d\d\d-\d\d-\d\d "
+            rf"\d\d:\d\d:\d\d\.\d\d\d\d\d\d \+\d\d\d\d"
+        )

         source, _ = read_data("expression.py")
         expected, _ = read_data("expression.diff")
         hold_stdin, hold_stdout = sys.stdin, sys.stdout
         try:
         source, _ = read_data("expression.py")
         expected, _ = read_data("expression.diff")
         hold_stdin, hold_stdout = sys.stdin, sys.stdout
         try:

-            sys.stdin, sys.stdout = StringIO(source), StringIO()
-            sys.stdin.name = "<stdin>"
+            sys.stdin = TextIOWrapper(BytesIO(source.encode("utf8")), encoding="utf8")
+            sys.stdout = TextIOWrapper(BytesIO(), encoding="utf8")

             black.format_stdin_to_stdout(
                 line_length=ll, fast=True, write_back=black.WriteBack.DIFF
             )
             sys.stdout.seek(0)
             actual = sys.stdout.read()
             black.format_stdin_to_stdout(
                 line_length=ll, fast=True, write_back=black.WriteBack.DIFF
             )
             sys.stdout.seek(0)
             actual = sys.stdout.read()

+            actual = diff_header.sub("[Deterministic header]", actual)

         finally:
             sys.stdin, sys.stdout = hold_stdin, hold_stdout
         actual = actual.rstrip() + "\n"  # the diff output has a trailing space
         finally:
             sys.stdin, sys.stdout = hold_stdin, hold_stdout
         actual = actual.rstrip() + "\n"  # the diff output has a trailing space


@@ -202,13 +228,17 @@ class BlackTestCase(unittest.TestCase):
         source, _ = read_data("expression.py")
         expected, _ = read_data("expression.diff")
         tmp_file = Path(black.dump_to_file(source))
         source, _ = read_data("expression.py")
         expected, _ = read_data("expression.diff")
         tmp_file = Path(black.dump_to_file(source))

+        diff_header = re.compile(
+            rf"{re.escape(str(tmp_file))}\t\d\d\d\d-\d\d-\d\d "
+            rf"\d\d:\d\d:\d\d\.\d\d\d\d\d\d \+\d\d\d\d"
+        )

         hold_stdout = sys.stdout
         try:
         hold_stdout = sys.stdout
         try:

-            sys.stdout = StringIO()
+            sys.stdout = TextIOWrapper(BytesIO(), encoding="utf8")

             self.assertTrue(ff(tmp_file, write_back=black.WriteBack.DIFF))
             sys.stdout.seek(0)
             actual = sys.stdout.read()
             self.assertTrue(ff(tmp_file, write_back=black.WriteBack.DIFF))
             sys.stdout.seek(0)
             actual = sys.stdout.read()

-            actual = actual.replace(str(tmp_file), "<stdin>")
+            actual = diff_header.sub("[Deterministic header]", actual)

         finally:
             sys.stdout = hold_stdout
             os.unlink(tmp_file)
         finally:
             sys.stdout = hold_stdout
             os.unlink(tmp_file)


@@ -854,10 +884,10 @@ class BlackTestCase(unittest.TestCase):
             cached_but_changed.touch()
             cache = {cached: black.get_cache_info(cached), cached_but_changed: (0.0, 0)}
             todo, done = black.filter_cached(
             cached_but_changed.touch()
             cache = {cached: black.get_cache_info(cached), cached_but_changed: (0.0, 0)}
             todo, done = black.filter_cached(

-                cache, [uncached, cached, cached_but_changed]
+                cache, {uncached, cached, cached_but_changed}

             )
             )

-            self.assertEqual(todo, [uncached, cached_but_changed])
-            self.assertEqual(done, [cached])
+            self.assertEqual(todo, {uncached, cached_but_changed})
+            self.assertEqual(done, {cached})

 
     def test_write_cache_creates_directory_if_needed(self) -> None:
         mode = black.FileMode.AUTO_DETECT
 
     def test_write_cache_creates_directory_if_needed(self) -> None:
         mode = black.FileMode.AUTO_DETECT


@@ -1108,6 +1138,18 @@ class BlackTestCase(unittest.TestCase):
             result = CliRunner().invoke(black.main, ["-", option, "**()(!!*)"])
             self.assertEqual(result.exit_code, 2)
 
             result = CliRunner().invoke(black.main, ["-", option, "**()(!!*)"])
             self.assertEqual(result.exit_code, 2)
 

+    def test_preserves_line_endings(self) -> None:
+        with TemporaryDirectory() as workspace:
+            test_file = Path(workspace) / "test.py"
+            for nl in ["\n", "\r\n"]:
+                contents = nl.join(["def f(  ):", "    pass"])
+                test_file.write_bytes(contents.encode())
+                ff(test_file, write_back=black.WriteBack.YES)
+                updated_contents: bytes = test_file.read_bytes()
+                self.assertIn(nl.encode(), updated_contents)  # type: ignore
+                if nl == "\n":
+                    self.assertNotIn(b"\r\n", updated_contents)  # type: ignore
+

 
 if __name__ == "__main__":
     unittest.main()
 
 if __name__ == "__main__":
     unittest.main()