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"""Test the black.ranges module."""
import pytest
from black.ranges import adjusted_lines, parse_line_ranges, sanitized_lines
@pytest.mark.parametrize(
"lines_str, expected",
[
(["1-5"], [(1, 5)]),
(["1-1"], [(1, 1)]),
(["1-3", "5-7"], [(1, 3), (5, 7)]),
],
)
def test_parse_line_ranges_valid(
lines_str: list[str], expected: list[tuple[int, int]]
) -> None:
assert parse_line_ranges(lines_str) == expected
@pytest.mark.parametrize(
"lines_str",
[
["5-3"],
["0-5"],
["-1-5"],
["5-0"],
],
)
def test_parse_line_ranges_invalid(lines_str: list[str]) -> None:
with pytest.raises(ValueError, match="Incorrect --line-ranges"):
parse_line_ranges(lines_str)
@pytest.mark.parametrize(
"lines",
[[(1, 1)], [(1, 3)], [(1, 1), (3, 4)]],
)
def test_no_diff(lines: list[tuple[int, int]]) -> None:
source = """\
import re
def func():
pass
"""
assert lines == adjusted_lines(lines, source, source)
@pytest.mark.parametrize("start,end", [(1, 2), (2, 3), (3, 4), (4, 5)])
def test_repeated_lines_map_to_their_original_positions(start: int, end: int) -> None:
unformatted = 'print ( "format me" )\n'
formatted = 'print("format me")\n'
original = unformatted * 5
modified = unformatted * (start - 1) + formatted * 2 + unformatted * (5 - end)
assert adjusted_lines([(start, end)], original, modified) == [(start, end)]
def test_repeated_lines_between_disjoint_ranges_stay_unselected() -> None:
unformatted = 'print ( "format me" )\n'
formatted = 'print("format me")\n'
original = unformatted * 3
modified = formatted + unformatted + formatted
assert adjusted_lines([(1, 1), (3, 3)], original, modified) == [
(1, 1),
(3, 3),
]
@pytest.mark.parametrize(
"lines",
[
[(1, 0)],
[(-8, 0)],
[(-8, 8)],
[(1, 100)],
[(2, 1)],
[(0, 8), (3, 1)],
],
)
def test_invalid_lines(lines: list[tuple[int, int]]) -> None:
original_source = """\
import re
def foo(arg):
'''This is the foo function.
This is foo function's
docstring with more descriptive texts.
'''
def func(arg1,
arg2, arg3):
pass
"""
modified_source = """\
import re
def foo(arg):
'''This is the foo function.
This is foo function's
docstring with more descriptive texts.
'''
def func(arg1, arg2, arg3):
pass
"""
assert not adjusted_lines(lines, original_source, modified_source)
@pytest.mark.parametrize(
"lines,adjusted",
[
(
# The first original line is removed, so it has no line to map onto.
[(1, 1)],
[],
),
(
[(1, 2)],
[(1, 1)],
),
(
[(1, 6)],
[(1, 2)],
),
(
[(6, 6)],
[],
),
],
)
def test_removals(
lines: list[tuple[int, int]], adjusted: list[tuple[int, int]]
) -> None:
original_source = """\
1. first line
2. second line
3. third line
4. fourth line
5. fifth line
6. sixth line
"""
modified_source = """\
2. second line
5. fifth line
"""
assert adjusted == adjusted_lines(lines, original_source, modified_source)
@pytest.mark.parametrize(
"lines,adjusted",
[
(
[(1, 1)],
[(2, 2)],
),
(
[(1, 2)],
[(2, 5)],
),
(
[(2, 2)],
[(5, 5)],
),
],
)
def test_additions(
lines: list[tuple[int, int]], adjusted: list[tuple[int, int]]
) -> None:
original_source = """\
1. first line
2. second line
"""
modified_source = """\
this is added
1. first line
this is added
this is added
2. second line
this is added
"""
assert adjusted == adjusted_lines(lines, original_source, modified_source)
@pytest.mark.parametrize(
"lines,adjusted",
[
(
[(1, 11)],
[(1, 10)],
),
(
[(1, 12)],
[(1, 11)],
),
(
[(10, 10)],
[(9, 9)],
),
([(1, 1), (9, 10)], [(1, 1), (9, 9)]),
([(9, 10), (1, 1)], [(1, 1), (9, 9)]),
],
)
def test_diffs(lines: list[tuple[int, int]], adjusted: list[tuple[int, int]]) -> None:
original_source = """\
1. import re
2. def foo(arg):
3. '''This is the foo function.
4.
5. This is foo function's
6. docstring with more descriptive texts.
7. '''
8.
9. def func(arg1,
10. arg2, arg3):
11. pass
12. # last line
"""
modified_source = """\
1. import re # changed
2. def foo(arg):
3. '''This is the foo function.
4.
5. This is foo function's
6. docstring with more descriptive texts.
7. '''
8.
9. def func(arg1, arg2, arg3):
11. pass
12. # last line changed
"""
assert adjusted == adjusted_lines(lines, original_source, modified_source)
@pytest.mark.parametrize(
"lines,adjusted",
[
([(1, 3)], [(1, 1)]),
([(2, 3)], [(1, 1)]),
([(4, 5)], [(2, 3)]),
([(5, 5)], [(3, 3)]),
],
)
def test_diff_at_the_start_of_the_file(
lines: list[tuple[int, int]], adjusted: list[tuple[int, int]]
) -> None:
"""Formatting the first statement of a file may join its lines.
Regression for https://github.com/psf/black/issues/4052: the lines that are
joined away must not be mapped onto the lines that follow the statement.
"""
original_source = """\
def restrict_to_this_line(arg1,
arg2,
arg3):
print ( "This should not be formatted." )
print ( "This should not be formatted." )
"""
modified_source = """\
def restrict_to_this_line(arg1, arg2, arg3):
print ( "This should not be formatted." )
print ( "This should not be formatted." )
"""
assert adjusted == adjusted_lines(lines, original_source, modified_source)
@pytest.mark.parametrize(
"lines,sanitized",
[
(
[(1, 4)],
[(1, 4)],
),
(
[(2, 3)],
[(2, 3)],
),
(
[(2, 10)],
[(2, 4)],
),
(
[(0, 3)],
[(1, 3)],
),
(
[(0, 10)],
[(1, 4)],
),
(
[(-2, 3)],
[(1, 3)],
),
(
[(0, 0)],
[],
),
(
[(-2, -1)],
[],
),
(
[(-1, 0)],
[],
),
(
[(3, 1), (1, 3), (5, 6)],
[(1, 3)],
),
],
)
def test_sanitize(
lines: list[tuple[int, int]], sanitized: list[tuple[int, int]]
) -> None:
source = """\
1. import re
2. def func(arg1,
3. arg2, arg3):
4. pass
"""
assert sanitized == sanitized_lines(lines, source)
source_no_trailing_nl = """\
1. import re
2. def func(arg1,
3. arg2, arg3):
4. pass"""
assert sanitized == sanitized_lines(lines, source_no_trailing_nl)
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