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primer: Hypothesis now requires Python>=3.8 (GH-2602)
[etc/vim.git] / tests / test_format.py
1 from dataclasses import replace
2 from typing import Any, Iterator
3 from unittest.mock import patch
4
5 import pytest
6
7 import black
8 from tests.util import (
9     DEFAULT_MODE,
10     PY36_VERSIONS,
11     THIS_DIR,
12     assert_format,
13     dump_to_stderr,
14     read_data,
15 )
16
17 SIMPLE_CASES = [
18     "beginning_backslash",
19     "bracketmatch",
20     "class_blank_parentheses",
21     "class_methods_new_line",
22     "collections",
23     "comments",
24     "comments2",
25     "comments3",
26     "comments4",
27     "comments5",
28     "comments6",
29     "comments_non_breaking_space",
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     "fmtskip6",
46     "fstring",
47     "function",
48     "function2",
49     "function_trailing_comma",
50     "import_spacing",
51     "remove_parens",
52     "slices",
53     "string_prefixes",
54     "tricky_unicode_symbols",
55     "tupleassign",
56 ]
57
58 SIMPLE_CASES_PY2 = [
59     "numeric_literals_py2",
60     "python2",
61     "python2_unicode_literals",
62 ]
63
64 EXPERIMENTAL_STRING_PROCESSING_CASES = [
65     "cantfit",
66     "comments7",
67     "long_strings",
68     "long_strings__edge_case",
69     "long_strings__regression",
70     "percent_precedence",
71 ]
72
73
74 SOURCES = [
75     "src/black/__init__.py",
76     "src/black/__main__.py",
77     "src/black/brackets.py",
78     "src/black/cache.py",
79     "src/black/comments.py",
80     "src/black/concurrency.py",
81     "src/black/const.py",
82     "src/black/debug.py",
83     "src/black/files.py",
84     "src/black/linegen.py",
85     "src/black/lines.py",
86     "src/black/mode.py",
87     "src/black/nodes.py",
88     "src/black/numerics.py",
89     "src/black/output.py",
90     "src/black/parsing.py",
91     "src/black/report.py",
92     "src/black/rusty.py",
93     "src/black/strings.py",
94     "src/black/trans.py",
95     "src/blackd/__init__.py",
96     "src/black_primer/cli.py",
97     "src/black_primer/lib.py",
98     "src/blib2to3/pygram.py",
99     "src/blib2to3/pytree.py",
100     "src/blib2to3/pgen2/conv.py",
101     "src/blib2to3/pgen2/driver.py",
102     "src/blib2to3/pgen2/grammar.py",
103     "src/blib2to3/pgen2/literals.py",
104     "src/blib2to3/pgen2/parse.py",
105     "src/blib2to3/pgen2/pgen.py",
106     "src/blib2to3/pgen2/tokenize.py",
107     "src/blib2to3/pgen2/token.py",
108     "setup.py",
109     "tests/test_black.py",
110     "tests/test_blackd.py",
111     "tests/test_format.py",
112     "tests/test_primer.py",
113     "tests/optional.py",
114     "tests/util.py",
115     "tests/conftest.py",
116 ]
117
118
119 @pytest.fixture(autouse=True)
120 def patch_dump_to_file(request: Any) -> Iterator[None]:
121     with patch("black.dump_to_file", dump_to_stderr):
122         yield
123
124
125 def check_file(filename: str, mode: black.Mode, *, data: bool = True) -> None:
126     source, expected = read_data(filename, data=data)
127     assert_format(source, expected, mode, fast=False)
128
129
130 @pytest.mark.parametrize("filename", SIMPLE_CASES_PY2)
131 @pytest.mark.python2
132 def test_simple_format_py2(filename: str) -> None:
133     check_file(filename, DEFAULT_MODE)
134
135
136 @pytest.mark.parametrize("filename", SIMPLE_CASES)
137 def test_simple_format(filename: str) -> None:
138     check_file(filename, DEFAULT_MODE)
139
140
141 @pytest.mark.parametrize("filename", EXPERIMENTAL_STRING_PROCESSING_CASES)
142 def test_experimental_format(filename: str) -> None:
143     check_file(filename, black.Mode(experimental_string_processing=True))
144
145
146 @pytest.mark.parametrize("filename", SOURCES)
147 def test_source_is_formatted(filename: str) -> None:
148     path = THIS_DIR.parent / filename
149     check_file(str(path), DEFAULT_MODE, data=False)
150
151
152 # =============== #
153 # Complex cases
154 # ============= #
155
156
157 def test_empty() -> None:
158     source = expected = ""
159     assert_format(source, expected)
160
161
162 def test_pep_572() -> None:
163     source, expected = read_data("pep_572")
164     assert_format(source, expected, minimum_version=(3, 8))
165
166
167 def test_pep_572_remove_parens() -> None:
168     source, expected = read_data("pep_572_remove_parens")
169     assert_format(source, expected, minimum_version=(3, 8))
170
171
172 def test_pep_572_do_not_remove_parens() -> None:
173     source, expected = read_data("pep_572_do_not_remove_parens")
174     # the AST safety checks will fail, but that's expected, just make sure no
175     # parentheses are touched
176     assert_format(source, expected, fast=True)
177
178
179 @pytest.mark.parametrize("major, minor", [(3, 9), (3, 10)])
180 def test_pep_572_newer_syntax(major: int, minor: int) -> None:
181     source, expected = read_data(f"pep_572_py{major}{minor}")
182     assert_format(source, expected, minimum_version=(major, minor))
183
184
185 def test_pep_570() -> None:
186     source, expected = read_data("pep_570")
187     assert_format(source, expected, minimum_version=(3, 8))
188
189
190 def test_docstring_no_string_normalization() -> None:
191     """Like test_docstring but with string normalization off."""
192     source, expected = read_data("docstring_no_string_normalization")
193     mode = replace(DEFAULT_MODE, string_normalization=False)
194     assert_format(source, expected, mode)
195
196
197 def test_long_strings_flag_disabled() -> None:
198     """Tests for turning off the string processing logic."""
199     source, expected = read_data("long_strings_flag_disabled")
200     mode = replace(DEFAULT_MODE, experimental_string_processing=False)
201     assert_format(source, expected, mode)
202
203
204 def test_numeric_literals() -> None:
205     source, expected = read_data("numeric_literals")
206     mode = replace(DEFAULT_MODE, target_versions=PY36_VERSIONS)
207     assert_format(source, expected, mode)
208
209
210 def test_numeric_literals_ignoring_underscores() -> None:
211     source, expected = read_data("numeric_literals_skip_underscores")
212     mode = replace(DEFAULT_MODE, target_versions=PY36_VERSIONS)
213     assert_format(source, expected, mode)
214
215
216 @pytest.mark.python2
217 def test_python2_print_function() -> None:
218     source, expected = read_data("python2_print_function")
219     mode = replace(DEFAULT_MODE, target_versions={black.TargetVersion.PY27})
220     assert_format(source, expected, mode)
221
222
223 def test_stub() -> None:
224     mode = replace(DEFAULT_MODE, is_pyi=True)
225     source, expected = read_data("stub.pyi")
226     assert_format(source, expected, mode)
227
228
229 def test_python38() -> None:
230     source, expected = read_data("python38")
231     assert_format(source, expected, minimum_version=(3, 8))
232
233
234 def test_python39() -> None:
235     source, expected = read_data("python39")
236     assert_format(source, expected, minimum_version=(3, 9))