X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/9fea4780228dc8e9ceb53ddb18fe1a87f6e05546..63da5d088cd8d38e925d9d45b194705fb5258ecc:/tests/test_black.py diff --git a/tests/test_black.py b/tests/test_black.py index c11fca0..d2359cb 100644 --- a/tests/test_black.py +++ b/tests/test_black.py @@ -1,6 +1,9 @@ #!/usr/bin/env python3 from functools import partial +from io import StringIO +import os from pathlib import Path +import sys from typing import Any, List, Tuple import unittest from unittest.mock import patch @@ -10,27 +13,29 @@ from click import unstyle import black ll = 88 -ff = partial(black.format_file, line_length=ll, fast=True) +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)" def dump_to_stderr(*output: str) -> str: - return '\n' + '\n'.join(output) + '\n' + return "\n" + "\n".join(output) + "\n" def read_data(name: str) -> Tuple[str, str]: """read_data('test_name') -> 'input', 'output'""" - if not name.endswith('.py'): - name += '.py' + if not name.endswith((".py", ".out", ".diff")): + name += ".py" _input: List[str] = [] _output: List[str] = [] - with open(THIS_DIR / name, 'r', encoding='utf8') as test: + with open(THIS_DIR / name, "r", encoding="utf8") as test: lines = test.readlines() result = _input for line in lines: - if line.rstrip() == '# output': + line = line.replace(EMPTY_LINE, "") + if line.rstrip() == "# output": result = _output continue @@ -38,23 +43,23 @@ def read_data(name: str) -> Tuple[str, str]: 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' + return "".join(_input).strip() + "\n", "".join(_output).strip() + "\n" class BlackTestCase(unittest.TestCase): maxDiff = None def assertFormatEqual(self, expected: str, actual: str) -> None: - if actual != expected: + if actual != expected and not os.environ.get("SKIP_AST_PRINT"): bdv: black.DebugVisitor[Any] - black.out('Expected tree:', fg='green') + 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') + black.out("Actual tree:", fg="red") try: exp_node = black.lib2to3_parse(actual) bdv = black.DebugVisitor() @@ -65,37 +70,68 @@ class BlackTestCase(unittest.TestCase): @patch("black.dump_to_file", dump_to_stderr) def test_self(self) -> None: - source, expected = read_data('test_black') + source, expected = read_data("test_black") actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) black.assert_stable(source, actual, line_length=ll) - with self.assertRaises(black.NothingChanged): - ff(THIS_FILE) + self.assertFalse(ff(THIS_FILE)) @patch("black.dump_to_file", dump_to_stderr) def test_black(self) -> None: - source, expected = read_data('../black') + source, expected = read_data("../black") actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) black.assert_stable(source, actual, line_length=ll) - with self.assertRaises(black.NothingChanged): - ff(THIS_FILE) + self.assertFalse(ff(THIS_DIR / ".." / "black.py")) + + def test_piping(self) -> None: + source, expected = read_data("../black") + hold_stdin, hold_stdout = sys.stdin, sys.stdout + try: + sys.stdin, sys.stdout = StringIO(source), StringIO() + sys.stdin.name = "" + black.format_stdin_to_stdout( + line_length=ll, fast=True, write_back=black.WriteBack.YES + ) + sys.stdout.seek(0) + actual = sys.stdout.read() + finally: + sys.stdin, sys.stdout = hold_stdin, hold_stdout + self.assertFormatEqual(expected, actual) + black.assert_equivalent(source, actual) + black.assert_stable(source, actual, line_length=ll) + + def test_piping_diff(self) -> None: + 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 = "" + black.format_stdin_to_stdout( + line_length=ll, fast=True, write_back=black.WriteBack.DIFF + ) + sys.stdout.seek(0) + actual = sys.stdout.read() + finally: + sys.stdin, sys.stdout = hold_stdin, hold_stdout + 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') + source, expected = read_data("../setup") actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) black.assert_stable(source, actual, line_length=ll) - with self.assertRaises(black.NothingChanged): - ff(THIS_FILE) + 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') + source, expected = read_data("function") actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) @@ -103,15 +139,54 @@ class BlackTestCase(unittest.TestCase): @patch("black.dump_to_file", dump_to_stderr) def test_expression(self) -> None: - source, expected = read_data('expression') + 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) 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)) + hold_stdout = sys.stdout + try: + sys.stdout = StringIO() + self.assertTrue(ff(tmp_file, write_back=black.WriteBack.DIFF)) + sys.stdout.seek(0) + actual = sys.stdout.read() + actual = actual.replace(tmp_file.name, "") + finally: + sys.stdout = hold_stdout + os.unlink(tmp_file) + 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_fstring(self) -> None: - source, expected = read_data('fstring') + 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) @@ -119,7 +194,7 @@ class BlackTestCase(unittest.TestCase): @patch("black.dump_to_file", dump_to_stderr) def test_comments(self) -> None: - source, expected = read_data('comments') + source, expected = read_data("comments") actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) @@ -127,7 +202,23 @@ class BlackTestCase(unittest.TestCase): @patch("black.dump_to_file", dump_to_stderr) def test_comments2(self) -> None: - source, expected = read_data('comments2') + 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) @@ -135,7 +226,7 @@ class BlackTestCase(unittest.TestCase): @patch("black.dump_to_file", dump_to_stderr) def test_cantfit(self) -> None: - source, expected = read_data('cantfit') + source, expected = read_data("cantfit") actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) @@ -143,7 +234,7 @@ class BlackTestCase(unittest.TestCase): @patch("black.dump_to_file", dump_to_stderr) def test_import_spacing(self) -> None: - source, expected = read_data('import_spacing') + source, expected = read_data("import_spacing") actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) @@ -151,7 +242,31 @@ class BlackTestCase(unittest.TestCase): @patch("black.dump_to_file", dump_to_stderr) def test_composition(self) -> None: - source, expected = read_data('composition') + 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_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_fmtonoff(self) -> None: + source, expected = read_data("fmtonoff") actual = fs(source) self.assertFormatEqual(expected, actual) black.assert_equivalent(source, actual) @@ -169,60 +284,69 @@ class BlackTestCase(unittest.TestCase): err_lines.append(msg) with patch("black.out", out), patch("black.err", err): - report.done(Path('f1'), changed=False) + report.done(Path("f1"), changed=False) 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(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"), changed=True) self.assertEqual(len(out_lines), 2) self.assertEqual(len(err_lines), 0) - self.assertEqual(out_lines[-1], 'reformatted f2') + self.assertEqual(out_lines[-1], "reformatted f2") self.assertEqual( - unstyle(str(report)), '1 file reformatted, 1 file left unchanged.' + unstyle(str(report)), "1 file reformatted, 1 file left unchanged." ) + self.assertEqual(report.return_code, 0) + report.check = True self.assertEqual(report.return_code, 1) - report.failed(Path('e1'), 'boom') + report.check = False + report.failed(Path("e1"), "boom") self.assertEqual(len(out_lines), 2) self.assertEqual(len(err_lines), 1) - self.assertEqual(err_lines[-1], 'error: cannot format e1: boom') + self.assertEqual(err_lines[-1], "error: cannot format e1: boom") self.assertEqual( unstyle(str(report)), - '1 file reformatted, 1 file left unchanged, ' - '1 file failed to reformat.', + "1 file reformatted, 1 file left unchanged, " + "1 file failed to reformat.", ) self.assertEqual(report.return_code, 123) - report.done(Path('f3'), changed=True) + report.done(Path("f3"), changed=True) self.assertEqual(len(out_lines), 3) self.assertEqual(len(err_lines), 1) - self.assertEqual(out_lines[-1], 'reformatted f3') + self.assertEqual(out_lines[-1], "reformatted f3") self.assertEqual( unstyle(str(report)), - '2 files reformatted, 1 file left unchanged, ' - '1 file failed to reformat.', + "2 files reformatted, 1 file left unchanged, " + "1 file failed to reformat.", ) self.assertEqual(report.return_code, 123) - report.failed(Path('e2'), 'boom') + report.failed(Path("e2"), "boom") self.assertEqual(len(out_lines), 3) self.assertEqual(len(err_lines), 2) - self.assertEqual(err_lines[-1], 'error: cannot format e2: boom') + self.assertEqual(err_lines[-1], "error: cannot format e2: boom") self.assertEqual( unstyle(str(report)), - '2 files reformatted, 1 file left unchanged, ' - '2 files failed to reformat.', + "2 files reformatted, 1 file left unchanged, " + "2 files failed to reformat.", ) self.assertEqual(report.return_code, 123) - report.done(Path('f4'), changed=False) + report.done(Path("f4"), changed=False) self.assertEqual(len(out_lines), 4) self.assertEqual(len(err_lines), 2) - self.assertEqual(out_lines[-1], 'f4 already well formatted, good job.') + 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 failed to reformat.', + "2 files reformatted, 2 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 fail to reformat.", + ) def test_is_python36(self) -> None: node = black.lib2to3_parse("def f(*, arg): ...\n") @@ -231,17 +355,86 @@ class BlackTestCase(unittest.TestCase): self.assertTrue(black.is_python36(node)) node = black.lib2to3_parse("def f(*, arg): f'string'\n") self.assertTrue(black.is_python36(node)) - source, expected = read_data('function') + 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') + 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_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(ValueError) 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), "") + -if __name__ == '__main__': +if __name__ == "__main__": unittest.main()