tests/test_format.py

   1 from unittest.mock import patch
   2
   3 import black
   4 from parameterized import parameterized
   5
   6 from tests.util import (
   7     BlackBaseTestCase,
   8     fs,
   9     ff,
  10     DEFAULT_MODE,
  11     dump_to_stderr,
  12     read_data,
  13     THIS_DIR,
  14 )
  15
  16 SIMPLE_CASES = [
  17     "beginning_backslash",
  18     "bracketmatch",
  19     "cantfit",
  20     "class_blank_parentheses",
  21     "class_methods_new_line",
  22     "collections",
  23     "comments",
  24     "comments2",
  25     "comments3",
  26     "comments4",
  27     "comments5",
  28     "comments6",
  29     "comments7",
  30     "comment_after_escaped_newline",
  31     "composition",
  32     "composition_no_trailing_comma",
  33     "docstring",
  34     "empty_lines",
  35     "expression",
  36     "fmtonoff",
  37     "fmtonoff2",
  38     "fmtonoff3",
  39     "fmtonoff4",
  40     "fmtskip",
  41     "fmtskip2",
  42     "fmtskip3",
  43     "fmtskip4",
  44     "fmtskip5",
  45     "fstring",
  46     "function",
  47     "function2",
  48     "function_trailing_comma",
  49     "import_spacing",
  50     "long_strings",
  51     "long_strings__edge_case",
  52     "long_strings__regression",
  53     "numeric_literals_py2",
  54     "percent_precedence",
  55     "python2",
  56     "python2_unicode_literals",
  57     "remove_parens",
  58     "slices",
  59     "string_prefixes",
  60     "tricky_unicode_symbols",
  61     "tupleassign",
  62 ]
  63
  64
  65 SOURCES = [
  66     "tests/test_black.py",
  67     "tests/test_format.py",
  68     "tests/test_blackd.py",
  69     "src/black/__init__.py",
  70     "src/blib2to3/pygram.py",
  71     "src/blib2to3/pytree.py",
  72     "src/blib2to3/pgen2/conv.py",
  73     "src/blib2to3/pgen2/driver.py",
  74     "src/blib2to3/pgen2/grammar.py",
  75     "src/blib2to3/pgen2/literals.py",
  76     "src/blib2to3/pgen2/parse.py",
  77     "src/blib2to3/pgen2/pgen.py",
  78     "src/blib2to3/pgen2/tokenize.py",
  79     "src/blib2to3/pgen2/token.py",
  80     "setup.py",
  81 ]
  82
  83
  84 class TestSimpleFormat(BlackBaseTestCase):
  85     @parameterized.expand(SIMPLE_CASES)
  86     @patch("black.dump_to_file", dump_to_stderr)
  87     def test_simple_format(self, filename: str) -> None:
  88         source, expected = read_data(filename)
  89         actual = fs(source)
  90         self.assertFormatEqual(expected, actual)
  91         black.assert_equivalent(source, actual)
  92         black.assert_stable(source, actual, DEFAULT_MODE)
  93
  94     @parameterized.expand(SOURCES)
  95     @patch("black.dump_to_file", dump_to_stderr)
  96     def test_source_is_formatted(self, filename: str) -> None:
  97         path = THIS_DIR.parent / filename
  98         source, expected = read_data(str(path), data=False)
  99         actual = fs(source, mode=DEFAULT_MODE)
 100         self.assertFormatEqual(expected, actual)
 101         black.assert_equivalent(source, actual)
 102         black.assert_stable(source, actual, DEFAULT_MODE)
 103         self.assertFalse(ff(path))