#!/usr/bin/env python3
+import asyncio
+from concurrent.futures import ThreadPoolExecutor
+from contextlib import contextmanager
from functools import partial
from io import StringIO
import os
from pathlib import Path
import sys
-from typing import Any, List, Tuple
+from tempfile import TemporaryDirectory
+from typing import Any, List, Tuple, Iterator
import unittest
from unittest.mock import patch
from click import unstyle
+from click.testing import CliRunner
import black
return "".join(_input).strip() + "\n", "".join(_output).strip() + "\n"
+@contextmanager
+def cache_dir(exists: bool = True) -> Iterator[Path]:
+ with TemporaryDirectory() as workspace:
+ cache_dir = Path(workspace)
+ if not exists:
+ cache_dir = cache_dir / "new"
+ cache_file = cache_dir / "cache.pkl"
+ with patch("black.CACHE_DIR", cache_dir), patch("black.CACHE_FILE", cache_file):
+ yield cache_dir
+
+
+@contextmanager
+def event_loop(close: bool) -> Iterator[None]:
+ policy = asyncio.get_event_loop_policy()
+ old_loop = policy.get_event_loop()
+ loop = policy.new_event_loop()
+ asyncio.set_event_loop(loop)
+ try:
+ yield
+
+ finally:
+ policy.set_event_loop(old_loop)
+ if close:
+ loop.close()
+
+
class BlackTestCase(unittest.TestCase):
maxDiff = None
tmp_file = Path(black.dump_to_file(source))
try:
self.assertTrue(ff(tmp_file, write_back=black.WriteBack.YES))
- with open(tmp_file) as f:
+ with open(tmp_file, encoding="utf8") as f:
actual = f.read()
finally:
os.unlink(tmp_file)
self.assertTrue(ff(tmp_file, write_back=black.WriteBack.DIFF))
sys.stdout.seek(0)
actual = sys.stdout.read()
- actual = actual.replace(tmp_file.name, "<stdin>")
+ actual = actual.replace(str(tmp_file), "<stdin>")
finally:
sys.stdout = hold_stdout
os.unlink(tmp_file)
actual = actual.rstrip() + "\n" # the diff output has a trailing space
- self.assertEqual(expected, actual)
+ if expected != actual:
+ dump = black.dump_to_file(actual)
+ msg = (
+ f"Expected diff isn't equal to the actual. If you made changes "
+ f"to expression.py and this is an anticipated difference, "
+ f"overwrite tests/expression.diff with {dump}"
+ )
+ self.assertEqual(expected, actual, msg)
@patch("black.dump_to_file", dump_to_stderr)
def test_fstring(self) -> None:
err_lines.append(msg)
with patch("black.out", out), patch("black.err", err):
- report.done(Path("f1"), changed=False)
+ report.done(Path("f1"), black.Changed.NO)
self.assertEqual(len(out_lines), 1)
self.assertEqual(len(err_lines), 0)
self.assertEqual(out_lines[-1], "f1 already well formatted, good job.")
self.assertEqual(unstyle(str(report)), "1 file left unchanged.")
self.assertEqual(report.return_code, 0)
- report.done(Path("f2"), changed=True)
+ report.done(Path("f2"), black.Changed.YES)
self.assertEqual(len(out_lines), 2)
self.assertEqual(len(err_lines), 0)
self.assertEqual(out_lines[-1], "reformatted f2")
self.assertEqual(
unstyle(str(report)), "1 file reformatted, 1 file left unchanged."
)
+ report.done(Path("f3"), black.Changed.CACHED)
+ self.assertEqual(len(out_lines), 3)
+ self.assertEqual(len(err_lines), 0)
+ self.assertEqual(
+ out_lines[-1], "f3 wasn't modified on disk since last run."
+ )
+ self.assertEqual(
+ unstyle(str(report)), "1 file reformatted, 2 files left unchanged."
+ )
self.assertEqual(report.return_code, 0)
report.check = True
self.assertEqual(report.return_code, 1)
report.check = False
report.failed(Path("e1"), "boom")
- self.assertEqual(len(out_lines), 2)
+ self.assertEqual(len(out_lines), 3)
self.assertEqual(len(err_lines), 1)
self.assertEqual(err_lines[-1], "error: cannot format e1: boom")
self.assertEqual(
unstyle(str(report)),
- "1 file reformatted, 1 file left unchanged, "
+ "1 file reformatted, 2 files left unchanged, "
"1 file failed to reformat.",
)
self.assertEqual(report.return_code, 123)
- report.done(Path("f3"), changed=True)
- self.assertEqual(len(out_lines), 3)
+ report.done(Path("f3"), black.Changed.YES)
+ self.assertEqual(len(out_lines), 4)
self.assertEqual(len(err_lines), 1)
self.assertEqual(out_lines[-1], "reformatted f3")
self.assertEqual(
unstyle(str(report)),
- "2 files reformatted, 1 file left unchanged, "
+ "2 files reformatted, 2 files left unchanged, "
"1 file failed to reformat.",
)
self.assertEqual(report.return_code, 123)
report.failed(Path("e2"), "boom")
- self.assertEqual(len(out_lines), 3)
+ self.assertEqual(len(out_lines), 4)
self.assertEqual(len(err_lines), 2)
self.assertEqual(err_lines[-1], "error: cannot format e2: boom")
self.assertEqual(
unstyle(str(report)),
- "2 files reformatted, 1 file left unchanged, "
+ "2 files reformatted, 2 files left unchanged, "
"2 files failed to reformat.",
)
self.assertEqual(report.return_code, 123)
- report.done(Path("f4"), changed=False)
- self.assertEqual(len(out_lines), 4)
+ report.done(Path("f4"), black.Changed.NO)
+ self.assertEqual(len(out_lines), 5)
self.assertEqual(len(err_lines), 2)
self.assertEqual(out_lines[-1], "f4 already well formatted, good job.")
self.assertEqual(
unstyle(str(report)),
- "2 files reformatted, 2 files left unchanged, "
+ "2 files reformatted, 3 files left unchanged, "
"2 files failed to reformat.",
)
self.assertEqual(report.return_code, 123)
report.check = True
self.assertEqual(
unstyle(str(report)),
- "2 files would be reformatted, 2 files would be left unchanged, "
+ "2 files would be reformatted, 3 files would be left unchanged, "
"2 files would fail to reformat.",
)
self.assertTrue("Actual tree:" in out_str)
self.assertEqual("".join(err_lines), "")
+ def test_cache_broken_file(self) -> None:
+ with cache_dir() as workspace:
+ with black.CACHE_FILE.open("w") as fobj:
+ fobj.write("this is not a pickle")
+ self.assertEqual(black.read_cache(), {})
+ src = (workspace / "test.py").resolve()
+ with src.open("w") as fobj:
+ fobj.write("print('hello')")
+ result = CliRunner().invoke(black.main, [str(src)])
+ self.assertEqual(result.exit_code, 0)
+ cache = black.read_cache()
+ self.assertIn(src, cache)
+
+ def test_cache_single_file_already_cached(self) -> None:
+ with cache_dir() as workspace:
+ src = (workspace / "test.py").resolve()
+ with src.open("w") as fobj:
+ fobj.write("print('hello')")
+ black.write_cache({}, [src])
+ result = CliRunner().invoke(black.main, [str(src)])
+ self.assertEqual(result.exit_code, 0)
+ with src.open("r") as fobj:
+ self.assertEqual(fobj.read(), "print('hello')")
+
+ @event_loop(close=False)
+ def test_cache_multiple_files(self) -> None:
+ with cache_dir() as workspace, patch(
+ "black.ProcessPoolExecutor", new=ThreadPoolExecutor
+ ):
+ one = (workspace / "one.py").resolve()
+ with one.open("w") as fobj:
+ fobj.write("print('hello')")
+ two = (workspace / "two.py").resolve()
+ with two.open("w") as fobj:
+ fobj.write("print('hello')")
+ black.write_cache({}, [one])
+ result = CliRunner().invoke(black.main, [str(workspace)])
+ self.assertEqual(result.exit_code, 0)
+ with one.open("r") as fobj:
+ self.assertEqual(fobj.read(), "print('hello')")
+ with two.open("r") as fobj:
+ self.assertEqual(fobj.read(), 'print("hello")\n')
+ cache = black.read_cache()
+ self.assertIn(one, cache)
+ self.assertIn(two, cache)
+
+ def test_no_cache_when_writeback_diff(self) -> None:
+ with cache_dir() as workspace:
+ src = (workspace / "test.py").resolve()
+ with src.open("w") as fobj:
+ fobj.write("print('hello')")
+ result = CliRunner().invoke(black.main, [str(src), "--diff"])
+ self.assertEqual(result.exit_code, 0)
+ self.assertFalse(black.CACHE_FILE.exists())
+
+ def test_no_cache_when_stdin(self) -> None:
+ with cache_dir():
+ result = CliRunner().invoke(black.main, ["-"], input="print('hello')")
+ self.assertEqual(result.exit_code, 0)
+ self.assertFalse(black.CACHE_FILE.exists())
+
+ def test_read_cache_no_cachefile(self) -> None:
+ with cache_dir():
+ self.assertEqual(black.read_cache(), {})
+
+ def test_write_cache_read_cache(self) -> None:
+ with cache_dir() as workspace:
+ src = (workspace / "test.py").resolve()
+ src.touch()
+ black.write_cache({}, [src])
+ cache = black.read_cache()
+ self.assertIn(src, cache)
+ self.assertEqual(cache[src], black.get_cache_info(src))
+
+ def test_filter_cached(self) -> None:
+ with TemporaryDirectory() as workspace:
+ path = Path(workspace)
+ uncached = (path / "uncached").resolve()
+ cached = (path / "cached").resolve()
+ cached_but_changed = (path / "changed").resolve()
+ uncached.touch()
+ cached.touch()
+ 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]
+ )
+ self.assertEqual(todo, [uncached, cached_but_changed])
+ self.assertEqual(done, [cached])
+
+ def test_write_cache_creates_directory_if_needed(self) -> None:
+ with cache_dir(exists=False) as workspace:
+ self.assertFalse(workspace.exists())
+ black.write_cache({}, [])
+ self.assertTrue(workspace.exists())
+
+ @event_loop(close=False)
+ def test_failed_formatting_does_not_get_cached(self) -> None:
+ with cache_dir() as workspace, patch(
+ "black.ProcessPoolExecutor", new=ThreadPoolExecutor
+ ):
+ failing = (workspace / "failing.py").resolve()
+ with failing.open("w") as fobj:
+ fobj.write("not actually python")
+ clean = (workspace / "clean.py").resolve()
+ with clean.open("w") as fobj:
+ fobj.write('print("hello")\n')
+ result = CliRunner().invoke(black.main, [str(workspace)])
+ self.assertEqual(result.exit_code, 123)
+ cache = black.read_cache()
+ self.assertNotIn(failing, cache)
+ self.assertIn(clean, cache)
+
+ def test_write_cache_write_fail(self) -> None:
+ with cache_dir(), patch.object(Path, "open") as mock:
+ mock.side_effect = OSError
+ black.write_cache({}, [])
+
+ def test_check_diff_use_together(self) -> None:
+ with cache_dir():
+ # Files which will be reformatted.
+ src1 = (THIS_DIR / "string_quotes.py").resolve()
+ result = CliRunner().invoke(black.main, [str(src1), "--diff", "--check"])
+ self.assertEqual(result.exit_code, 1)
+
+ # Files which will not be reformatted.
+ src2 = (THIS_DIR / "composition.py").resolve()
+ result = CliRunner().invoke(black.main, [str(src2), "--diff", "--check"])
+ self.assertEqual(result.exit_code, 0)
+
+ # Multi file command.
+ result = CliRunner().invoke(
+ black.main, [str(src1), str(src2), "--diff", "--check"]
+ )
+ self.assertEqual(result.exit_code, 1)
+
if __name__ == "__main__":
unittest.main()
projects / etc / vim.git / blobdiff