#!/usr/bin/env python3 import asyncio from concurrent.futures import ThreadPoolExecutor from contextlib import contextmanager, redirect_stderr from functools import partial, wraps from io import BytesIO, TextIOWrapper import os from pathlib import Path import re import sys from tempfile import TemporaryDirectory from typing import ( Any, BinaryIO, Callable, Coroutine, Generator, List, Tuple, Iterator, TypeVar, ) import unittest from unittest.mock import patch, MagicMock from click import unstyle from click.testing import CliRunner import black try: import blackd from aiohttp.test_utils import TestClient, TestServer except ImportError: has_blackd_deps = False else: has_blackd_deps = True ll = 88 ff = partial(black.format_file_in_place, line_length=ll, fast=True) fs = partial(black.format_str, line_length=ll) THIS_FILE = Path(__file__) THIS_DIR = THIS_FILE.parent EMPTY_LINE = "# EMPTY LINE WITH WHITESPACE" + " (this comment will be removed)" T = TypeVar("T") R = TypeVar("R") def dump_to_stderr(*output: str) -> str: return "\n" + "\n".join(output) + "\n" def read_data(name: str, data: bool = True) -> Tuple[str, str]: """read_data('test_name') -> 'input', 'output'""" if not name.endswith((".py", ".pyi", ".out", ".diff")): name += ".py" _input: List[str] = [] _output: List[str] = [] base_dir = THIS_DIR / "data" if data else THIS_DIR with open(base_dir / name, "r", encoding="utf8") as test: lines = test.readlines() result = _input for line in lines: line = line.replace(EMPTY_LINE, "") if line.rstrip() == "# output": result = _output continue result.append(line) if _input and not _output: # If there's no output marker, treat the entire file as already pre-formatted. _output = _input[:] 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" with patch("black.CACHE_DIR", cache_dir): 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() def async_test(f: Callable[..., Coroutine[Any, None, R]]) -> Callable[..., None]: @event_loop(close=True) @wraps(f) def wrapper(*args: Any, **kwargs: Any) -> None: asyncio.get_event_loop().run_until_complete(f(*args, **kwargs)) return wrapper class BlackRunner(CliRunner): """Modify CliRunner so that stderr is not merged with stdout. This is a hack that can be removed once we depend on Click 7.x""" def __init__(self) -> None: self.stderrbuf = BytesIO() self.stdoutbuf = BytesIO() self.stdout_bytes = b"" self.stderr_bytes = b"" super().__init__() @contextmanager def isolation(self, *args: Any, **kwargs: Any) -> Generator[BinaryIO, None, None]: with super().isolation(*args, **kwargs) as output: try: hold_stderr = sys.stderr sys.stderr = TextIOWrapper(self.stderrbuf, encoding=self.charset) yield output finally: self.stdout_bytes = sys.stdout.buffer.getvalue() # type: ignore self.stderr_bytes = sys.stderr.buffer.getvalue() # type: ignore sys.stderr = hold_stderr class BlackTestCase(unittest.TestCase): maxDiff = None def assertFormatEqual(self, expected: str, actual: str) -> None: if actual != expected and not os.environ.get("SKIP_AST_PRINT"): bdv: black.DebugVisitor[Any] black.out("Expected tree:", fg="green") try: exp_node = black.lib2to3_parse(expected) bdv = black.DebugVisitor() list(bdv.visit(exp_node)) except Exception as ve: black.err(str(ve)) black.out("Actual tree:", fg="red") try: exp_node = black.lib2to3_parse(actual) bdv = black.DebugVisitor() list(bdv.visit(exp_node)) except Exception as ve: 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", data=False) actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) black.assert_stable(source, actual, line_length=ll) self.assertFalse(ff(THIS_FILE)) @patch("black.dump_to_file", dump_to_stderr) def test_black(self) -> None: source, expected = read_data("../black", data=False) actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) black.assert_stable(source, actual, line_length=ll) self.assertFalse(ff(THIS_DIR / ".." / "black.py")) def test_piping(self) -> None: source, expected = read_data("../black", data=False) result = BlackRunner().invoke( black.main, ["-", "--fast", f"--line-length={ll}"], input=BytesIO(source.encode("utf8")), ) self.assertEqual(result.exit_code, 0) self.assertFormatEqual(expected, result.output) black.assert_equivalent(source, result.output) black.assert_stable(source, result.output, 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") config = THIS_DIR / "data" / "empty_pyproject.toml" args = ["-", "--fast", f"--line-length={ll}", "--diff", f"--config={config}"] result = BlackRunner().invoke( black.main, args, input=BytesIO(source.encode("utf8")) ) self.assertEqual(result.exit_code, 0) actual = diff_header.sub("[Deterministic header]", result.output) actual = actual.rstrip() + "\n" # the diff output has a trailing space self.assertEqual(expected, actual) @patch("black.dump_to_file", dump_to_stderr) def test_setup(self) -> None: source, expected = read_data("../setup", data=False) actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) black.assert_stable(source, actual, line_length=ll) self.assertFalse(ff(THIS_DIR / ".." / "setup.py")) @patch("black.dump_to_file", dump_to_stderr) def test_function(self) -> None: source, expected = read_data("function") 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_function2(self) -> None: source, expected = read_data("function2") 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_expression(self) -> None: source, expected = read_data("expression") actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) black.assert_stable(source, actual, line_length=ll) def test_expression_ff(self) -> None: source, expected = read_data("expression") tmp_file = Path(black.dump_to_file(source)) try: self.assertTrue(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) with patch("black.dump_to_file", dump_to_stderr): black.assert_equivalent(source, actual) black.assert_stable(source, actual, line_length=ll) def test_expression_diff(self) -> None: 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" ) try: result = BlackRunner().invoke(black.main, ["--diff", str(tmp_file)]) self.assertEqual(result.exit_code, 0) finally: os.unlink(tmp_file) actual = result.output actual = diff_header.sub("[Deterministic header]", actual) actual = actual.rstrip() + "\n" # the diff output has a trailing space 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/data/expression.diff with {dump}" ) self.assertEqual(expected, actual, msg) @patch("black.dump_to_file", dump_to_stderr) def test_fstring(self) -> None: source, expected = read_data("fstring") 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_string_quotes(self) -> None: source, expected = read_data("string_quotes") actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) black.assert_stable(source, actual, line_length=ll) mode = black.FileMode.NO_STRING_NORMALIZATION not_normalized = fs(source, mode=mode) self.assertFormatEqual(source, not_normalized) black.assert_equivalent(source, not_normalized) black.assert_stable(source, not_normalized, line_length=ll, mode=mode) @patch("black.dump_to_file", dump_to_stderr) def test_slices(self) -> None: source, expected = read_data("slices") 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_comments(self) -> None: source, expected = read_data("comments") 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_comments2(self) -> None: source, expected = read_data("comments2") 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_comments3(self) -> None: source, expected = read_data("comments3") 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_comments4(self) -> None: source, expected = read_data("comments4") 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_comments5(self) -> None: source, expected = read_data("comments5") 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_comments6(self) -> None: source, expected = read_data("comments6") 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_cantfit(self) -> None: source, expected = read_data("cantfit") 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_import_spacing(self) -> None: source, expected = read_data("import_spacing") 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_composition(self) -> None: source, expected = read_data("composition") 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_empty_lines(self) -> None: source, expected = read_data("empty_lines") 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_string_prefixes(self) -> None: source, expected = read_data("string_prefixes") 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_numeric_literals(self) -> None: source, expected = read_data("numeric_literals") actual = fs(source, mode=black.FileMode.PYTHON36) 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_numeric_literals_ignoring_underscores(self) -> None: source, expected = read_data("numeric_literals_skip_underscores") mode = ( black.FileMode.PYTHON36 | black.FileMode.NO_NUMERIC_UNDERSCORE_NORMALIZATION ) actual = fs(source, mode=mode) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) black.assert_stable(source, actual, line_length=ll, mode=mode) @patch("black.dump_to_file", dump_to_stderr) def test_numeric_literals_py2(self) -> None: source, expected = read_data("numeric_literals_py2") actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_stable(source, actual, line_length=ll) @patch("black.dump_to_file", dump_to_stderr) def test_python2(self) -> None: source, expected = read_data("python2") 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_python2_unicode_literals(self) -> None: source, expected = read_data("python2_unicode_literals") actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_stable(source, actual, line_length=ll) @patch("black.dump_to_file", dump_to_stderr) def test_stub(self) -> None: mode = black.FileMode.PYI source, expected = read_data("stub.pyi") actual = fs(source, mode=mode) self.assertFormatEqual(expected, actual) black.assert_stable(source, actual, line_length=ll, mode=mode) @patch("black.dump_to_file", dump_to_stderr) def test_python37(self) -> None: source, expected = read_data("python37") actual = fs(source) self.assertFormatEqual(expected, actual) major, minor = sys.version_info[:2] if major > 3 or (major == 3 and minor >= 7): black.assert_equivalent(source, actual) black.assert_stable(source, actual, line_length=ll) @patch("black.dump_to_file", dump_to_stderr) def test_fmtonoff(self) -> None: source, expected = read_data("fmtonoff") 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_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") 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_new_line_between_class_and_code(self) -> None: source, expected = read_data("class_methods_new_line") 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_bracket_match(self) -> None: source, expected = read_data("bracketmatch") actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) black.assert_stable(source, actual, line_length=ll) def test_comment_indentation(self) -> None: contents_tab = "if 1:\n\tif 2:\n\t\tpass\n\t# comment\n\tpass\n" contents_spc = "if 1:\n if 2:\n pass\n # comment\n pass\n" self.assertFormatEqual(fs(contents_spc), contents_spc) self.assertFormatEqual(fs(contents_tab), contents_spc) contents_tab = "if 1:\n\tif 2:\n\t\tpass\n\t\t# comment\n\tpass\n" contents_spc = "if 1:\n if 2:\n pass\n # comment\n pass\n" self.assertFormatEqual(fs(contents_tab), contents_spc) self.assertFormatEqual(fs(contents_spc), contents_spc) def test_report_verbose(self) -> None: report = black.Report(verbose=True) out_lines = [] err_lines = [] def out(msg: str, **kwargs: Any) -> None: out_lines.append(msg) def err(msg: str, **kwargs: Any) -> None: err_lines.append(msg) with patch("black.out", out), patch("black.err", err): 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"), 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), 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, 2 files left unchanged, " "1 file failed to reformat.", ) self.assertEqual(report.return_code, 123) 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, 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), 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, 2 files left unchanged, " "2 files failed to reformat.", ) self.assertEqual(report.return_code, 123) report.path_ignored(Path("wat"), "no match") self.assertEqual(len(out_lines), 5) self.assertEqual(len(err_lines), 2) self.assertEqual(out_lines[-1], "wat ignored: no match") self.assertEqual( unstyle(str(report)), "2 files reformatted, 2 files left unchanged, " "2 files failed to reformat.", ) self.assertEqual(report.return_code, 123) report.done(Path("f4"), black.Changed.NO) self.assertEqual(len(out_lines), 6) 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, 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, 3 files would be left unchanged, " "2 files would fail to reformat.", ) def test_report_quiet(self) -> None: report = black.Report(quiet=True) out_lines = [] err_lines = [] def out(msg: str, **kwargs: Any) -> None: out_lines.append(msg) def err(msg: str, **kwargs: Any) -> None: err_lines.append(msg) with patch("black.out", out), patch("black.err", err): report.done(Path("f1"), black.Changed.NO) self.assertEqual(len(out_lines), 0) self.assertEqual(len(err_lines), 0) self.assertEqual(unstyle(str(report)), "1 file left unchanged.") self.assertEqual(report.return_code, 0) report.done(Path("f2"), black.Changed.YES) self.assertEqual(len(out_lines), 0) self.assertEqual(len(err_lines), 0) self.assertEqual( unstyle(str(report)), "1 file reformatted, 1 file left unchanged." ) report.done(Path("f3"), black.Changed.CACHED) self.assertEqual(len(out_lines), 0) self.assertEqual(len(err_lines), 0) 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), 0) self.assertEqual(len(err_lines), 1) self.assertEqual(err_lines[-1], "error: cannot format e1: boom") self.assertEqual( unstyle(str(report)), "1 file reformatted, 2 files left unchanged, " "1 file failed to reformat.", ) self.assertEqual(report.return_code, 123) report.done(Path("f3"), black.Changed.YES) self.assertEqual(len(out_lines), 0) self.assertEqual(len(err_lines), 1) self.assertEqual( unstyle(str(report)), "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), 0) self.assertEqual(len(err_lines), 2) self.assertEqual(err_lines[-1], "error: cannot format e2: boom") self.assertEqual( unstyle(str(report)), "2 files reformatted, 2 files left unchanged, " "2 files failed to reformat.", ) self.assertEqual(report.return_code, 123) report.path_ignored(Path("wat"), "no match") self.assertEqual(len(out_lines), 0) self.assertEqual(len(err_lines), 2) self.assertEqual( unstyle(str(report)), "2 files reformatted, 2 files left unchanged, " "2 files failed to reformat.", ) self.assertEqual(report.return_code, 123) report.done(Path("f4"), black.Changed.NO) self.assertEqual(len(out_lines), 0) self.assertEqual(len(err_lines), 2) self.assertEqual( unstyle(str(report)), "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, 3 files would be left unchanged, " "2 files would fail to reformat.", ) def test_report_normal(self) -> None: report = black.Report() out_lines = [] err_lines = [] def out(msg: str, **kwargs: Any) -> None: out_lines.append(msg) def err(msg: str, **kwargs: Any) -> None: err_lines.append(msg) with patch("black.out", out), patch("black.err", err): report.done(Path("f1"), black.Changed.NO) self.assertEqual(len(out_lines), 0) self.assertEqual(len(err_lines), 0) self.assertEqual(unstyle(str(report)), "1 file left unchanged.") self.assertEqual(report.return_code, 0) report.done(Path("f2"), black.Changed.YES) self.assertEqual(len(out_lines), 1) 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), 1) self.assertEqual(len(err_lines), 0) self.assertEqual(out_lines[-1], "reformatted f2") 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), 1) self.assertEqual(len(err_lines), 1) self.assertEqual(err_lines[-1], "error: cannot format e1: boom") self.assertEqual( unstyle(str(report)), "1 file reformatted, 2 files left unchanged, " "1 file failed to reformat.", ) self.assertEqual(report.return_code, 123) report.done(Path("f3"), black.Changed.YES) self.assertEqual(len(out_lines), 2) self.assertEqual(len(err_lines), 1) self.assertEqual(out_lines[-1], "reformatted f3") self.assertEqual( unstyle(str(report)), "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), 2) self.assertEqual(len(err_lines), 2) self.assertEqual(err_lines[-1], "error: cannot format e2: boom") self.assertEqual( unstyle(str(report)), "2 files reformatted, 2 files left unchanged, " "2 files failed to reformat.", ) self.assertEqual(report.return_code, 123) report.path_ignored(Path("wat"), "no match") self.assertEqual(len(out_lines), 2) self.assertEqual(len(err_lines), 2) self.assertEqual( unstyle(str(report)), "2 files reformatted, 2 files left unchanged, " "2 files failed to reformat.", ) self.assertEqual(report.return_code, 123) report.done(Path("f4"), black.Changed.NO) self.assertEqual(len(out_lines), 2) self.assertEqual(len(err_lines), 2) self.assertEqual( unstyle(str(report)), "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, 3 files would be left unchanged, " "2 files would fail to reformat.", ) def test_is_python36(self) -> None: node = black.lib2to3_parse("def f(*, arg): ...\n") self.assertFalse(black.is_python36(node)) node = black.lib2to3_parse("def f(*, arg,): ...\n") self.assertTrue(black.is_python36(node)) node = black.lib2to3_parse("def f(*, arg): f'string'\n") self.assertTrue(black.is_python36(node)) node = black.lib2to3_parse("123_456\n") self.assertTrue(black.is_python36(node)) node = black.lib2to3_parse("123456\n") self.assertFalse(black.is_python36(node)) source, expected = read_data("function") node = black.lib2to3_parse(source) self.assertTrue(black.is_python36(node)) node = black.lib2to3_parse(expected) self.assertTrue(black.is_python36(node)) source, expected = read_data("expression") node = black.lib2to3_parse(source) self.assertFalse(black.is_python36(node)) node = black.lib2to3_parse(expected) self.assertFalse(black.is_python36(node)) def test_get_future_imports(self) -> None: node = black.lib2to3_parse("\n") self.assertEqual(set(), black.get_future_imports(node)) node = black.lib2to3_parse("from __future__ import black\n") self.assertEqual({"black"}, black.get_future_imports(node)) node = black.lib2to3_parse("from __future__ import multiple, imports\n") self.assertEqual({"multiple", "imports"}, black.get_future_imports(node)) node = black.lib2to3_parse("from __future__ import (parenthesized, imports)\n") self.assertEqual({"parenthesized", "imports"}, black.get_future_imports(node)) node = black.lib2to3_parse( "from __future__ import multiple\nfrom __future__ import imports\n" ) self.assertEqual({"multiple", "imports"}, black.get_future_imports(node)) node = black.lib2to3_parse("# comment\nfrom __future__ import black\n") self.assertEqual({"black"}, black.get_future_imports(node)) node = black.lib2to3_parse('"""docstring"""\nfrom __future__ import black\n') self.assertEqual({"black"}, black.get_future_imports(node)) node = black.lib2to3_parse("some(other, code)\nfrom __future__ import black\n") self.assertEqual(set(), black.get_future_imports(node)) node = black.lib2to3_parse("from some.module import black\n") self.assertEqual(set(), black.get_future_imports(node)) node = black.lib2to3_parse( "from __future__ import unicode_literals as _unicode_literals" ) self.assertEqual({"unicode_literals"}, black.get_future_imports(node)) node = black.lib2to3_parse( "from __future__ import unicode_literals as _lol, print" ) self.assertEqual({"unicode_literals", "print"}, black.get_future_imports(node)) def test_debug_visitor(self) -> None: source, _ = read_data("debug_visitor.py") expected, _ = read_data("debug_visitor.out") out_lines = [] err_lines = [] def out(msg: str, **kwargs: Any) -> None: out_lines.append(msg) def err(msg: str, **kwargs: Any) -> None: err_lines.append(msg) with patch("black.out", out), patch("black.err", err): black.DebugVisitor.show(source) actual = "\n".join(out_lines) + "\n" log_name = "" if expected != actual: log_name = black.dump_to_file(*out_lines) self.assertEqual( expected, actual, f"AST print out is different. Actual version dumped to {log_name}", ) def test_format_file_contents(self) -> None: empty = "" with self.assertRaises(black.NothingChanged): black.format_file_contents(empty, line_length=ll, fast=False) just_nl = "\n" with self.assertRaises(black.NothingChanged): black.format_file_contents(just_nl, line_length=ll, fast=False) same = "l = [1, 2, 3]\n" with self.assertRaises(black.NothingChanged): black.format_file_contents(same, line_length=ll, fast=False) different = "l = [1,2,3]" expected = same actual = black.format_file_contents(different, line_length=ll, fast=False) self.assertEqual(expected, actual) invalid = "return if you can" with self.assertRaises(black.InvalidInput) as e: black.format_file_contents(invalid, line_length=ll, fast=False) self.assertEqual(str(e.exception), "Cannot parse: 1:7: return if you can") def test_endmarker(self) -> None: n = black.lib2to3_parse("\n") self.assertEqual(n.type, black.syms.file_input) self.assertEqual(len(n.children), 1) self.assertEqual(n.children[0].type, black.token.ENDMARKER) @unittest.skipIf(os.environ.get("SKIP_AST_PRINT"), "user set SKIP_AST_PRINT") def test_assertFormatEqual(self) -> None: out_lines = [] err_lines = [] def out(msg: str, **kwargs: Any) -> None: out_lines.append(msg) def err(msg: str, **kwargs: Any) -> None: err_lines.append(msg) with patch("black.out", out), patch("black.err", err): with self.assertRaises(AssertionError): self.assertFormatEqual("l = [1, 2, 3]", "l = [1, 2, 3,]") out_str = "".join(out_lines) self.assertTrue("Expected tree:" in out_str) self.assertTrue("Actual tree:" in out_str) self.assertEqual("".join(err_lines), "") def test_cache_broken_file(self) -> None: mode = black.FileMode.AUTO_DETECT with cache_dir() as workspace: cache_file = black.get_cache_file(black.DEFAULT_LINE_LENGTH, mode) with cache_file.open("w") as fobj: fobj.write("this is not a pickle") self.assertEqual(black.read_cache(black.DEFAULT_LINE_LENGTH, mode), {}) 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(black.DEFAULT_LINE_LENGTH, mode) self.assertIn(src, cache) def test_cache_single_file_already_cached(self) -> None: mode = black.FileMode.AUTO_DETECT with cache_dir() as workspace: src = (workspace / "test.py").resolve() with src.open("w") as fobj: fobj.write("print('hello')") black.write_cache({}, [src], black.DEFAULT_LINE_LENGTH, mode) 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: mode = black.FileMode.AUTO_DETECT 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], black.DEFAULT_LINE_LENGTH, mode) 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(black.DEFAULT_LINE_LENGTH, mode) self.assertIn(one, cache) self.assertIn(two, cache) def test_no_cache_when_writeback_diff(self) -> None: mode = black.FileMode.AUTO_DETECT 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) cache_file = black.get_cache_file(black.DEFAULT_LINE_LENGTH, mode) self.assertFalse(cache_file.exists()) def test_no_cache_when_stdin(self) -> None: mode = black.FileMode.AUTO_DETECT with cache_dir(): result = CliRunner().invoke( black.main, ["-"], input=BytesIO(b"print('hello')") ) self.assertEqual(result.exit_code, 0) cache_file = black.get_cache_file(black.DEFAULT_LINE_LENGTH, mode) self.assertFalse(cache_file.exists()) def test_read_cache_no_cachefile(self) -> None: mode = black.FileMode.AUTO_DETECT with cache_dir(): self.assertEqual(black.read_cache(black.DEFAULT_LINE_LENGTH, mode), {}) def test_write_cache_read_cache(self) -> None: mode = black.FileMode.AUTO_DETECT with cache_dir() as workspace: src = (workspace / "test.py").resolve() src.touch() black.write_cache({}, [src], black.DEFAULT_LINE_LENGTH, mode) cache = black.read_cache(black.DEFAULT_LINE_LENGTH, mode) 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: mode = black.FileMode.AUTO_DETECT with cache_dir(exists=False) as workspace: self.assertFalse(workspace.exists()) black.write_cache({}, [], black.DEFAULT_LINE_LENGTH, mode) self.assertTrue(workspace.exists()) @event_loop(close=False) def test_failed_formatting_does_not_get_cached(self) -> None: mode = black.FileMode.AUTO_DETECT 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(black.DEFAULT_LINE_LENGTH, mode) self.assertNotIn(failing, cache) self.assertIn(clean, cache) def test_write_cache_write_fail(self) -> None: mode = black.FileMode.AUTO_DETECT with cache_dir(), patch.object(Path, "open") as mock: mock.side_effect = OSError black.write_cache({}, [], black.DEFAULT_LINE_LENGTH, mode) @event_loop(close=False) def test_check_diff_use_together(self) -> None: with cache_dir(): # Files which will be reformatted. src1 = (THIS_DIR / "data" / "string_quotes.py").resolve() result = CliRunner().invoke(black.main, [str(src1), "--diff", "--check"]) self.assertEqual(result.exit_code, 1, result.output) # Files which will not be reformatted. src2 = (THIS_DIR / "data" / "composition.py").resolve() result = CliRunner().invoke(black.main, [str(src2), "--diff", "--check"]) self.assertEqual(result.exit_code, 0, result.output) # Multi file command. result = CliRunner().invoke( black.main, [str(src1), str(src2), "--diff", "--check"] ) self.assertEqual(result.exit_code, 1, result.output) def test_no_files(self) -> None: with cache_dir(): # Without an argument, black exits with error code 0. result = CliRunner().invoke(black.main, []) self.assertEqual(result.exit_code, 0) def test_broken_symlink(self) -> None: with cache_dir() as workspace: symlink = workspace / "broken_link.py" try: symlink.symlink_to("nonexistent.py") except OSError as e: self.skipTest(f"Can't create symlinks: {e}") result = CliRunner().invoke(black.main, [str(workspace.resolve())]) self.assertEqual(result.exit_code, 0) def test_read_cache_line_lengths(self) -> None: mode = black.FileMode.AUTO_DETECT with cache_dir() as workspace: path = (workspace / "file.py").resolve() path.touch() black.write_cache({}, [path], 1, mode) one = black.read_cache(1, mode) self.assertIn(path, one) two = black.read_cache(2, mode) self.assertNotIn(path, two) def test_single_file_force_pyi(self) -> None: reg_mode = black.FileMode.AUTO_DETECT pyi_mode = black.FileMode.PYI contents, expected = read_data("force_pyi") with cache_dir() as workspace: path = (workspace / "file.py").resolve() with open(path, "w") as fh: fh.write(contents) result = CliRunner().invoke(black.main, [str(path), "--pyi"]) self.assertEqual(result.exit_code, 0) with open(path, "r") as fh: actual = fh.read() # verify cache with --pyi is separate pyi_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, pyi_mode) self.assertIn(path, pyi_cache) normal_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, reg_mode) self.assertNotIn(path, normal_cache) self.assertEqual(actual, expected) @event_loop(close=False) def test_multi_file_force_pyi(self) -> None: reg_mode = black.FileMode.AUTO_DETECT pyi_mode = black.FileMode.PYI contents, expected = read_data("force_pyi") with cache_dir() as workspace: paths = [ (workspace / "file1.py").resolve(), (workspace / "file2.py").resolve(), ] for path in paths: with open(path, "w") as fh: fh.write(contents) result = CliRunner().invoke(black.main, [str(p) for p in paths] + ["--pyi"]) self.assertEqual(result.exit_code, 0) for path in paths: with open(path, "r") as fh: actual = fh.read() self.assertEqual(actual, expected) # verify cache with --pyi is separate pyi_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, pyi_mode) normal_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, reg_mode) for path in paths: self.assertIn(path, pyi_cache) self.assertNotIn(path, normal_cache) def test_pipe_force_pyi(self) -> None: source, expected = read_data("force_pyi") result = CliRunner().invoke( black.main, ["-", "-q", "--pyi"], input=BytesIO(source.encode("utf8")) ) self.assertEqual(result.exit_code, 0) actual = result.output self.assertFormatEqual(actual, expected) def test_single_file_force_py36(self) -> None: reg_mode = black.FileMode.AUTO_DETECT py36_mode = black.FileMode.PYTHON36 source, expected = read_data("force_py36") with cache_dir() as workspace: path = (workspace / "file.py").resolve() with open(path, "w") as fh: fh.write(source) result = CliRunner().invoke(black.main, [str(path), "--py36"]) self.assertEqual(result.exit_code, 0) with open(path, "r") as fh: actual = fh.read() # verify cache with --py36 is separate py36_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, py36_mode) self.assertIn(path, py36_cache) normal_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, reg_mode) self.assertNotIn(path, normal_cache) self.assertEqual(actual, expected) @event_loop(close=False) def test_multi_file_force_py36(self) -> None: reg_mode = black.FileMode.AUTO_DETECT py36_mode = black.FileMode.PYTHON36 source, expected = read_data("force_py36") with cache_dir() as workspace: paths = [ (workspace / "file1.py").resolve(), (workspace / "file2.py").resolve(), ] for path in paths: with open(path, "w") as fh: fh.write(source) result = CliRunner().invoke( black.main, [str(p) for p in paths] + ["--py36"] ) self.assertEqual(result.exit_code, 0) for path in paths: with open(path, "r") as fh: actual = fh.read() self.assertEqual(actual, expected) # verify cache with --py36 is separate pyi_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, py36_mode) normal_cache = black.read_cache(black.DEFAULT_LINE_LENGTH, reg_mode) for path in paths: self.assertIn(path, pyi_cache) self.assertNotIn(path, normal_cache) def test_pipe_force_py36(self) -> None: source, expected = read_data("force_py36") result = CliRunner().invoke( black.main, ["-", "-q", "--py36"], input=BytesIO(source.encode("utf8")) ) self.assertEqual(result.exit_code, 0) actual = result.output self.assertFormatEqual(actual, expected) def test_include_exclude(self) -> None: path = THIS_DIR / "data" / "include_exclude_tests" include = re.compile(r"\.pyi?$") exclude = re.compile(r"/exclude/|/\.definitely_exclude/") report = black.Report() sources: List[Path] = [] expected = [ Path(path / "b/dont_exclude/a.py"), Path(path / "b/dont_exclude/a.pyi"), ] this_abs = THIS_DIR.resolve() sources.extend( black.gen_python_files_in_dir(path, this_abs, include, exclude, report) ) self.assertEqual(sorted(expected), sorted(sources)) def test_empty_include(self) -> None: path = THIS_DIR / "data" / "include_exclude_tests" report = black.Report() empty = re.compile(r"") sources: List[Path] = [] expected = [ Path(path / "b/exclude/a.pie"), Path(path / "b/exclude/a.py"), Path(path / "b/exclude/a.pyi"), Path(path / "b/dont_exclude/a.pie"), Path(path / "b/dont_exclude/a.py"), Path(path / "b/dont_exclude/a.pyi"), Path(path / "b/.definitely_exclude/a.pie"), Path(path / "b/.definitely_exclude/a.py"), Path(path / "b/.definitely_exclude/a.pyi"), ] this_abs = THIS_DIR.resolve() sources.extend( black.gen_python_files_in_dir( path, this_abs, empty, re.compile(black.DEFAULT_EXCLUDES), report ) ) self.assertEqual(sorted(expected), sorted(sources)) def test_empty_exclude(self) -> None: path = THIS_DIR / "data" / "include_exclude_tests" report = black.Report() empty = re.compile(r"") sources: List[Path] = [] expected = [ Path(path / "b/dont_exclude/a.py"), Path(path / "b/dont_exclude/a.pyi"), Path(path / "b/exclude/a.py"), Path(path / "b/exclude/a.pyi"), Path(path / "b/.definitely_exclude/a.py"), Path(path / "b/.definitely_exclude/a.pyi"), ] this_abs = THIS_DIR.resolve() sources.extend( black.gen_python_files_in_dir( path, this_abs, re.compile(black.DEFAULT_INCLUDES), empty, report ) ) self.assertEqual(sorted(expected), sorted(sources)) def test_invalid_include_exclude(self) -> None: for option in ["--include", "--exclude"]: 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) if nl == "\n": self.assertNotIn(b"\r\n", updated_contents) def test_preserves_line_endings_via_stdin(self) -> None: for nl in ["\n", "\r\n"]: contents = nl.join(["def f( ):", " pass"]) runner = BlackRunner() result = runner.invoke( black.main, ["-", "--fast"], input=BytesIO(contents.encode("utf8")) ) self.assertEqual(result.exit_code, 0) output = runner.stdout_bytes self.assertIn(nl.encode("utf8"), output) if nl == "\n": self.assertNotIn(b"\r\n", output) def test_assert_equivalent_different_asts(self) -> None: with self.assertRaises(AssertionError): black.assert_equivalent("{}", "None") def test_symlink_out_of_root_directory(self) -> None: path = MagicMock() root = THIS_DIR child = MagicMock() include = re.compile(black.DEFAULT_INCLUDES) exclude = re.compile(black.DEFAULT_EXCLUDES) report = black.Report() # `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 try: list(black.gen_python_files_in_dir(path, root, include, exclude, report)) except ValueError as ve: self.fail(f"`get_python_files_in_dir()` failed: {ve}") path.iterdir.assert_called_once() child.resolve.assert_called_once() child.is_symlink.assert_called_once() # `child` should behave like a strange file which resolved path is clearly # outside of the `root` directory. child.is_symlink.return_value = False with self.assertRaises(ValueError): list(black.gen_python_files_in_dir(path, root, include, exclude, report)) 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}") @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") @async_test async def test_blackd_request_needs_formatting(self) -> None: app = blackd.make_app() async with TestClient(TestServer(app)) as client: response = await client.post("/", data=b"print('hello world')") self.assertEqual(response.status, 200) self.assertEqual(response.charset, "utf8") self.assertEqual(await response.read(), b'print("hello world")\n') @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") @async_test async def test_blackd_request_no_change(self) -> None: app = blackd.make_app() async with TestClient(TestServer(app)) as client: response = await client.post("/", data=b'print("hello world")\n') self.assertEqual(response.status, 204) self.assertEqual(await response.read(), b"") @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") @async_test async def test_blackd_request_syntax_error(self) -> None: app = blackd.make_app() async with TestClient(TestServer(app)) as client: response = await client.post("/", data=b"what even ( is") self.assertEqual(response.status, 400) content = await response.text() self.assertTrue( content.startswith("Cannot parse"), msg=f"Expected error to start with 'Cannot parse', got {repr(content)}", ) @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") @async_test async def test_blackd_unsupported_version(self) -> None: app = blackd.make_app() async with TestClient(TestServer(app)) as client: response = await client.post( "/", data=b"what", headers={blackd.VERSION_HEADER: "2"} ) self.assertEqual(response.status, 501) @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") @async_test async def test_blackd_supported_version(self) -> None: app = blackd.make_app() async with TestClient(TestServer(app)) as client: response = await client.post( "/", data=b"what", headers={blackd.VERSION_HEADER: "1"} ) self.assertEqual(response.status, 200) @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") @async_test async def test_blackd_invalid_python_variant(self) -> None: app = blackd.make_app() async with TestClient(TestServer(app)) as client: response = await client.post( "/", data=b"what", headers={blackd.PYTHON_VARIANT_HEADER: "lol"} ) self.assertEqual(response.status, 400) @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") @async_test async def test_blackd_pyi(self) -> None: app = blackd.make_app() async with TestClient(TestServer(app)) as client: source, expected = read_data("stub.pyi") response = await client.post( "/", data=source, headers={blackd.PYTHON_VARIANT_HEADER: "pyi"} ) self.assertEqual(response.status, 200) self.assertEqual(await response.text(), expected) @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") @async_test async def test_blackd_py36(self) -> None: app = blackd.make_app() async with TestClient(TestServer(app)) as client: response = await client.post( "/", data=( "def f(\n" " and_has_a_bunch_of,\n" " very_long_arguments_too,\n" " and_lots_of_them_as_well_lol,\n" " **and_very_long_keyword_arguments\n" "):\n" " pass\n" ), headers={blackd.PYTHON_VARIANT_HEADER: "3.6"}, ) self.assertEqual(response.status, 200) response = await client.post( "/", data=( "def f(\n" " and_has_a_bunch_of,\n" " very_long_arguments_too,\n" " and_lots_of_them_as_well_lol,\n" " **and_very_long_keyword_arguments\n" "):\n" " pass\n" ), headers={blackd.PYTHON_VARIANT_HEADER: "3.5"}, ) self.assertEqual(response.status, 204) response = await client.post( "/", data=( "def f(\n" " and_has_a_bunch_of,\n" " very_long_arguments_too,\n" " and_lots_of_them_as_well_lol,\n" " **and_very_long_keyword_arguments\n" "):\n" " pass\n" ), headers={blackd.PYTHON_VARIANT_HEADER: "2"}, ) self.assertEqual(response.status, 204) @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") @async_test async def test_blackd_fast(self) -> None: with open(os.devnull, "w") as dn, redirect_stderr(dn): app = blackd.make_app() async with TestClient(TestServer(app)) as client: response = await client.post("/", data=b"ur'hello'") self.assertEqual(response.status, 500) self.assertIn("failed to parse source file", await response.text()) response = await client.post( "/", data=b"ur'hello'", headers={blackd.FAST_OR_SAFE_HEADER: "fast"} ) self.assertEqual(response.status, 200) @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") @async_test async def test_blackd_line_length(self) -> None: app = blackd.make_app() async with TestClient(TestServer(app)) as client: response = await client.post( "/", data=b'print("hello")\n', headers={blackd.LINE_LENGTH_HEADER: "7"} ) self.assertEqual(response.status, 200) @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") @async_test async def test_blackd_invalid_line_length(self) -> None: app = blackd.make_app() async with TestClient(TestServer(app)) as client: response = await client.post( "/", data=b'print("hello")\n', headers={blackd.LINE_LENGTH_HEADER: "NaN"}, ) self.assertEqual(response.status, 400) @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed") def test_blackd_main(self) -> None: with patch("blackd.web.run_app"): result = CliRunner().invoke(blackd.main, []) if result.exception is not None: raise result.exception self.assertEqual(result.exit_code, 0) if __name__ == "__main__": unittest.main(module="test_black")