Update Black tests (#13375)

crates/ruff_python_formatter/resources/test/fixtures/black/cases/backslash_before_indent.options.json

@@ -0,0 +1 @@
+{"target_version": "py310"}

crates/ruff_python_formatter/resources/test/fixtures/black/cases/backslash_before_indent.py

@@ -0,0 +1,10 @@
+class Plotter:
+\
+    pass
+
+class AnotherCase:
+  \
+    """Some
+    \
+    Docstring
+    """

crates/ruff_python_formatter/resources/test/fixtures/black/cases/backslash_before_indent.py.expect

@@ -0,0 +1,10 @@
+class Plotter:
+
+    pass
+
+
+class AnotherCase:
+    """Some
+    \
+    Docstring
+    """

crates/ruff_python_formatter/resources/test/fixtures/black/cases/comment_after_escaped_newline.py.expect

@@ -2,5 +2,7 @@ def bob():  # pylint: disable=W9016
     pass
 
 
-def bobtwo():  # some comment here
+def bobtwo():
+
+    # some comment here
     pass

crates/ruff_python_formatter/resources/test/fixtures/black/cases/dummy_implementations.py

@@ -67,3 +67,63 @@ async def async_function(self):
 @decorated
 async def async_function(self):
     ...
+
+class ClassA:
+    def f(self):
+        
+        ...
+
+
+class ClassB:
+    def f(self):
+        
+        
+        
+        
+        
+        
+        
+        
+        
+        ...
+
+
+class ClassC:
+    def f(self):
+        
+        ...
+        # Comment
+
+
+class ClassD:
+    def f(self):# Comment 1
+        
+        ...# Comment 2
+        # Comment 3
+
+
+class ClassE:
+    def f(self):
+        
+        ...
+    def f2(self):
+        print(10)
+
+
+class ClassF:
+    def f(self):
+        
+        ...# Comment 2
+
+
+class ClassG:
+    def f(self):#Comment 1
+        
+        ...# Comment 2
+ 
+       
+class ClassH:
+    def f(self):
+        #Comment
+
+        ...

crates/ruff_python_formatter/resources/test/fixtures/black/cases/dummy_implementations.py.expect

@@ -70,3 +70,47 @@ async def async_function(self): ...
 
 @decorated
 async def async_function(self): ...
+
+
+class ClassA:
+    def f(self): ...
+
+
+class ClassB:
+    def f(self): ...
+
+
+class ClassC:
+    def f(self):
+
+        ...
+        # Comment
+
+
+class ClassD:
+    def f(self):  # Comment 1
+
+        ...  # Comment 2
+        # Comment 3
+
+
+class ClassE:
+    def f(self): ...
+    def f2(self):
+        print(10)
+
+
+class ClassF:
+    def f(self): ...  # Comment 2
+
+
+class ClassG:
+    def f(self):  # Comment 1
+        ...  # Comment 2
+
+
+class ClassH:
+    def f(self):
+        # Comment
+
+        ...

crates/ruff_python_formatter/resources/test/fixtures/black/cases/fmtonoff6.py

@@ -0,0 +1,13 @@
+# Regression test for https://github.com/psf/black/issues/2478.
+def foo():
+    arr = (
+        (3833567325051000, 5, 1, 2, 4229.25, 6, 0),
+        # fmt: off
+    )
+
+
+# Regression test for https://github.com/psf/black/issues/3458.
+dependencies = {
+    a: b,
+    # fmt: off
+}

crates/ruff_python_formatter/resources/test/fixtures/black/cases/fmtonoff6.py.expect

@@ -0,0 +1,13 @@
+# Regression test for https://github.com/psf/black/issues/2478.
+def foo():
+    arr = (
+        (3833567325051000, 5, 1, 2, 4229.25, 6, 0),
+        # fmt: off
+    )
+
+
+# Regression test for https://github.com/psf/black/issues/3458.
+dependencies = {
+    a: b,
+    # fmt: off
+}

crates/ruff_python_formatter/resources/test/fixtures/black/cases/form_feeds.py.expect

@@ -33,6 +33,7 @@
 
 #
 
+
 #
 pass
 

crates/ruff_python_formatter/resources/test/fixtures/black/cases/function_trailing_comma.py

@@ -59,3 +59,61 @@ some_module.some_function(
 some_module.some_function(
     argument1, (one, two,), argument4, argument5, argument6
 )
+
+def foo() -> (
+    # comment inside parenthesised return type
+    int
+):
+    ...
+
+def foo() -> (
+    # comment inside parenthesised return type
+    # more
+    int
+    # another
+):
+    ...
+
+def foo() -> (
+    # comment inside parenthesised new union return type
+    int | str | bytes
+):
+    ...
+
+def foo() -> (
+    # comment inside plain tuple
+):
+    pass
+
+def foo(arg: (# comment with non-return annotation
+        int
+        # comment with non-return annotation
+)):
+    pass
+
+def foo(arg: (# comment with non-return annotation
+        int | range | memoryview
+        # comment with non-return annotation
+)):
+    pass
+
+def foo(arg: (# only before
+        int
+)):
+    pass
+
+def foo(arg: (
+        int
+        # only after
+)):
+    pass
+
+variable: ( # annotation
+    because
+    # why not
+)
+
+variable: (
+    because
+    # why not
+)

crates/ruff_python_formatter/resources/test/fixtures/black/cases/function_trailing_comma.py.expect

@@ -112,3 +112,75 @@ some_module.some_function(
     argument5,
     argument6,
 )
+
+
+def foo() -> (
+    # comment inside parenthesised return type
+    int
+): ...
+
+
+def foo() -> (
+    # comment inside parenthesised return type
+    # more
+    int
+    # another
+): ...
+
+
+def foo() -> (
+    # comment inside parenthesised new union return type
+    int
+    | str
+    | bytes
+): ...
+
+
+def foo() -> (
+    # comment inside plain tuple
+):
+    pass
+
+
+def foo(
+    arg: (  # comment with non-return annotation
+        int
+        # comment with non-return annotation
+    ),
+):
+    pass
+
+
+def foo(
+    arg: (  # comment with non-return annotation
+        int
+        | range
+        | memoryview
+        # comment with non-return annotation
+    ),
+):
+    pass
+
+
+def foo(arg: int):  # only before
+    pass
+
+
+def foo(
+    arg: (
+        int
+        # only after
+    ),
+):
+    pass
+
+
+variable: (  # annotation
+    because
+    # why not
+)
+
+variable: (
+    because
+    # why not
+)

crates/ruff_python_formatter/resources/test/fixtures/black/cases/line_ranges_basic.py

@@ -6,7 +6,7 @@ def foo2(parameter_1, parameter_2, parameter_3, parameter_4, parameter_5, parame
 def foo3(parameter_1, parameter_2, parameter_3, parameter_4, parameter_5, parameter_6, parameter_7): pass
 def foo4(parameter_1, parameter_2, parameter_3, parameter_4, parameter_5, parameter_6, parameter_7): pass
 
-# Adding some unformatted code covering a wide range of syntaxes.
+# Adding some unformated code covering a wide range of syntaxes.
 
 if True:
       # Incorrectly indented prefix comments.

crates/ruff_python_formatter/resources/test/fixtures/black/cases/line_ranges_basic.py.expect

@@ -28,7 +28,7 @@ def foo3(
 
 def foo4(parameter_1, parameter_2, parameter_3, parameter_4, parameter_5, parameter_6, parameter_7): pass
 
-# Adding some unformatted code covering a wide range of syntaxes.
+# Adding some unformated code covering a wide range of syntaxes.
 
 if True:
       # Incorrectly indented prefix comments.

crates/ruff_python_formatter/resources/test/fixtures/black/cases/line_ranges_exceeding_end.py

@@ -0,0 +1,7 @@
+# flags: --line-ranges=6-1000
+# NOTE: If you need to modify this file, pay special attention to the --line-ranges=
+# flag above as it's formatting specifically these lines.
+def foo1(parameter_1, parameter_2, parameter_3, parameter_4, parameter_5, parameter_6, parameter_7): pass
+def foo2(parameter_1, parameter_2, parameter_3, parameter_4, parameter_5, parameter_6, parameter_7): pass
+def foo3(parameter_1, parameter_2, parameter_3, parameter_4, parameter_5, parameter_6, parameter_7): pass
+def foo4(parameter_1, parameter_2, parameter_3, parameter_4, parameter_5, parameter_6, parameter_7): pass

crates/ruff_python_formatter/resources/test/fixtures/black/cases/line_ranges_exceeding_end.py.expect

@@ -0,0 +1,27 @@
+# flags: --line-ranges=6-1000
+# NOTE: If you need to modify this file, pay special attention to the --line-ranges=
+# flag above as it's formatting specifically these lines.
+def foo1(parameter_1, parameter_2, parameter_3, parameter_4, parameter_5, parameter_6, parameter_7): pass
+def foo2(parameter_1, parameter_2, parameter_3, parameter_4, parameter_5, parameter_6, parameter_7): pass
+def foo3(
+    parameter_1,
+    parameter_2,
+    parameter_3,
+    parameter_4,
+    parameter_5,
+    parameter_6,
+    parameter_7,
+):
+    pass
+
+
+def foo4(
+    parameter_1,
+    parameter_2,
+    parameter_3,
+    parameter_4,
+    parameter_5,
+    parameter_6,
+    parameter_7,
+):
+    pass

crates/ruff_python_formatter/resources/test/fixtures/black/cases/pattern_matching_complex.py

@@ -82,7 +82,7 @@ match (0, 1, 2):
 match x:
     case [0]:
         y = 0
-    case [1, 0] if (x := x[:0]):
+    case [1, 0] if x := x[:0]:
         y = 1
     case [1, 0]:
         y = 2

crates/ruff_python_formatter/resources/test/fixtures/black/cases/pattern_matching_complex.py.expect

@@ -82,7 +82,7 @@ match (0, 1, 2):
 match x:
     case [0]:
         y = 0
-    case [1, 0] if (x := x[:0]):
+    case [1, 0] if x := x[:0]:
         y = 1
     case [1, 0]:
         y = 2

crates/ruff_python_formatter/resources/test/fixtures/black/cases/pattern_matching_with_if_stmt.options.json

@@ -0,0 +1 @@
+{"preview": "enabled", "target_version": "py310"}

crates/ruff_python_formatter/resources/test/fixtures/black/cases/pattern_matching_with_if_stmt.py

@@ -0,0 +1,32 @@
+match match:
+    case "test" if case != "not very loooooooooooooog condition":  # comment
+        pass
+
+match smth:
+    case "test" if "any long condition" != "another long condition" and "this is a long condition":
+        pass
+    case test if "any long condition" != "another long condition" and "this is a looooong condition":
+        pass
+    case test if "any long condition" != "another long condition" and "this is a looooong condition":  # some additional comments
+        pass
+    case test if (True): # some comment
+        pass
+    case test if (False
+        ): # some comment
+        pass
+    case test if (True  # some comment
+        ):
+        pass  # some comment
+    case cases if (True  # some comment
+                   ): # some other comment
+        pass  # some comment
+    case match if (True  # some comment
+                   ):
+        pass  # some comment
+
+# case black_test_patma_052 (originally in the pattern_matching_complex test case)
+match x:
+    case [1, 0] if x := x[:0]:
+        y = 1
+    case [1, 0] if (x := x[:0]):
+        y = 1

crates/ruff_python_formatter/resources/test/fixtures/black/cases/pattern_matching_with_if_stmt.py.expect

@@ -0,0 +1,36 @@
+match match:
+    case "test" if case != "not very loooooooooooooog condition":  # comment
+        pass
+
+match smth:
+    case "test" if (
+        "any long condition" != "another long condition" and "this is a long condition"
+    ):
+        pass
+    case test if (
+        "any long condition" != "another long condition"
+        and "this is a looooong condition"
+    ):
+        pass
+    case test if (
+        "any long condition" != "another long condition"
+        and "this is a looooong condition"
+    ):  # some additional comments
+        pass
+    case test if True:  # some comment
+        pass
+    case test if False:  # some comment
+        pass
+    case test if True:  # some comment
+        pass  # some comment
+    case cases if True:  # some comment  # some other comment
+        pass  # some comment
+    case match if True:  # some comment
+        pass  # some comment
+
+# case black_test_patma_052 (originally in the pattern_matching_complex test case)
+match x:
+    case [1, 0] if x := x[:0]:
+        y = 1
+    case [1, 0] if x := x[:0]:
+        y = 1

crates/ruff_python_formatter/resources/test/fixtures/black/cases/pep604_union_types_line_breaks.py

@@ -19,7 +19,7 @@ z: (Short
 z: (int) = 2.3
 z: ((int)) = foo()
 
-# In case I go for not enforcing parentheses, this might get improved at the same time
+# In case I go for not enforcing parantheses, this might get improved at the same time
 x = (
     z
     == 9999999999999999999999999999999999999999

crates/ruff_python_formatter/resources/test/fixtures/black/cases/pep604_union_types_line_breaks.py.expect

@@ -28,7 +28,7 @@ z: Short | Short2 | Short3 | Short4 = 8
 z: int = 2.3
 z: int = foo()
 
-# In case I go for not enforcing parentheses, this might get improved at the same time
+# In case I go for not enforcing parantheses, this might get improved at the same time
 x = (
     z
     == 9999999999999999999999999999999999999999

crates/ruff_python_formatter/resources/test/fixtures/black/cases/pep_701.options.json

@@ -0,0 +1 @@
+{"target_version": "py312"}

crates/ruff_python_formatter/resources/test/fixtures/black/cases/pep_701.py

@@ -0,0 +1,136 @@
+x = f"foo"
+x = f'foo'
+x = f"""foo"""
+x = f'''foo'''
+x = f"foo {{ bar {{ baz"
+x = f"foo {{ {2 + 2}bar {{ baz"
+x = f'foo {{ {2 + 2}bar {{ baz'
+x = f"""foo {{ {2 + 2}bar {{ baz"""
+x = f'''foo {{ {2 + 2}bar {{ baz'''
+
+# edge case: FSTRING_MIDDLE containing only whitespace should not be stripped
+x = f"{a} {b}"
+
+x = f"foo {
+    2 + 2
+} bar baz"
+
+x = f"foo {{ {"a  {2 + 2}  b"}bar {{ baz"
+x = f"foo {{ {f'a  {2 + 2}  b'}bar {{ baz"
+x = f"foo {{ {f"a  {2 + 2}  b"}bar {{ baz"
+
+x = f"foo {{ {f'a  {f"a  {2 + 2}  b"}  b'}bar {{ baz"
+x = f"foo {{ {f"a  {f"a  {2 + 2}  b"}  b"}bar {{ baz"
+
+x = """foo {{ {2 + 2}bar
+baz"""
+
+
+x = f"""foo {{ {2 + 2}bar {{ baz"""
+
+x = f"""foo {{ {
+    2 + 2
+}bar {{ baz"""
+
+
+x = f"""foo {{ {
+    2 + 2
+}bar
+baz"""
+
+x = f"""foo {{ a
+    foo {2 + 2}bar {{ baz
+
+    x = f"foo {{ {
+        2 + 2  # comment
+    }bar"
+
+    {{ baz
+
+    }} buzz
+
+    {print("abc" + "def"
+)}
+abc"""
+
+# edge case: end triple quotes at index zero
+f"""foo {2+2} bar
+"""
+
+f' \' {f"'"} \' '
+f" \" {f'"'} \" "
+
+x = f"a{2+2:=^72}b"
+x = f"a{2+2:x}b"
+
+rf'foo'
+rf'{foo}'
+
+f"{x:{y}d}"
+
+x = f"a{2+2:=^{x}}b"
+x = f"a{2+2:=^{foo(x+y**2):something else}}b"
+x = f"a{2+2:=^{foo(x+y**2):something else}one more}b"
+f'{(abc:=10)}'
+
+f"This is a really long string, but just make sure that you reflow fstrings {
+    2+2:d
+}"
+f"This is a really long string, but just make sure that you reflow fstrings correctly {2+2:d}"
+
+f"{2+2=}"
+f"{2+2    =    }"
+f"{     2      +     2    =    }"
+
+f"""foo {
+    datetime.datetime.now():%Y
+%m
+%d
+}"""
+
+f"{
+X
+!r
+}"
+
+raise ValueError(
+                "xxxxxxxxxxxIncorrect --line-ranges format, expect START-END, found"
+                f" {lines_str!r}"
+            )
+
+f"`escape` only permitted in {{'html', 'latex', 'latex-math'}}, \
+got {escape}"
+
+x = f'\N{GREEK CAPITAL LETTER DELTA} \N{SNOWMAN} {x}'
+fr'\{{\}}'
+
+f"""
+    WITH {f'''
+    {1}_cte AS ()'''}
+"""
+
+value: str = f'''foo
+'''
+
+log(
+    f"Received operation {server_operation.name} from "
+    f"{self.writer._transport.get_extra_info('peername')}",  # type: ignore[attr-defined]
+    level=0,
+)
+
+f"{1:{f'{2}'}}"
+f'{1:{f'{2}'}}'
+f'{1:{2}d}'
+
+f'{{\\"kind\\":\\"ConfigMap\\",\\"metadata\\":{{\\"annotations\\":{{}},\\"name\\":\\"cluster-info\\",\\"namespace\\":\\"amazon-cloudwatch\\"}}}}'
+
+f"""{'''
+'''}"""
+
+f"{'\''}"
+f"{f'\''}"
+
+f'{1}\{{'
+f'{2} foo \{{[\}}'
+f'\{3}'
+rf"\{"a"}"

crates/ruff_python_formatter/resources/test/fixtures/black/cases/pep_701.py.expect

@@ -0,0 +1,136 @@
+x = f"foo"
+x = f"foo"
+x = f"""foo"""
+x = f"""foo"""
+x = f"foo {{ bar {{ baz"
+x = f"foo {{ {2 + 2}bar {{ baz"
+x = f"foo {{ {2 + 2}bar {{ baz"
+x = f"""foo {{ {2 + 2}bar {{ baz"""
+x = f"""foo {{ {2 + 2}bar {{ baz"""
+
+# edge case: FSTRING_MIDDLE containing only whitespace should not be stripped
+x = f"{a} {b}"
+
+x = f"foo {
+    2 + 2
+} bar baz"
+
+x = f"foo {{ {"a  {2 + 2}  b"}bar {{ baz"
+x = f"foo {{ {f'a  {2 + 2}  b'}bar {{ baz"
+x = f"foo {{ {f"a  {2 + 2}  b"}bar {{ baz"
+
+x = f"foo {{ {f'a  {f"a  {2 + 2}  b"}  b'}bar {{ baz"
+x = f"foo {{ {f"a  {f"a  {2 + 2}  b"}  b"}bar {{ baz"
+
+x = """foo {{ {2 + 2}bar
+baz"""
+
+
+x = f"""foo {{ {2 + 2}bar {{ baz"""
+
+x = f"""foo {{ {
+    2 + 2
+}bar {{ baz"""
+
+
+x = f"""foo {{ {
+    2 + 2
+}bar
+baz"""
+
+x = f"""foo {{ a
+    foo {2 + 2}bar {{ baz
+
+    x = f"foo {{ {
+        2 + 2  # comment
+    }bar"
+
+    {{ baz
+
+    }} buzz
+
+    {print("abc" + "def"
+)}
+abc"""
+
+# edge case: end triple quotes at index zero
+f"""foo {2+2} bar
+"""
+
+f' \' {f"'"} \' '
+f" \" {f'"'} \" "
+
+x = f"a{2+2:=^72}b"
+x = f"a{2+2:x}b"
+
+rf"foo"
+rf"{foo}"
+
+f"{x:{y}d}"
+
+x = f"a{2+2:=^{x}}b"
+x = f"a{2+2:=^{foo(x+y**2):something else}}b"
+x = f"a{2+2:=^{foo(x+y**2):something else}one more}b"
+f"{(abc:=10)}"
+
+f"This is a really long string, but just make sure that you reflow fstrings {
+    2+2:d
+}"
+f"This is a really long string, but just make sure that you reflow fstrings correctly {2+2:d}"
+
+f"{2+2=}"
+f"{2+2    =    }"
+f"{     2      +     2    =    }"
+
+f"""foo {
+    datetime.datetime.now():%Y
+%m
+%d
+}"""
+
+f"{
+X
+!r
+}"
+
+raise ValueError(
+    "xxxxxxxxxxxIncorrect --line-ranges format, expect START-END, found"
+    f" {lines_str!r}"
+)
+
+f"`escape` only permitted in {{'html', 'latex', 'latex-math'}}, \
+got {escape}"
+
+x = f"\N{GREEK CAPITAL LETTER DELTA} \N{SNOWMAN} {x}"
+rf"\{{\}}"
+
+f"""
+    WITH {f'''
+    {1}_cte AS ()'''}
+"""
+
+value: str = f"""foo
+"""
+
+log(
+    f"Received operation {server_operation.name} from "
+    f"{self.writer._transport.get_extra_info('peername')}",  # type: ignore[attr-defined]
+    level=0,
+)
+
+f"{1:{f'{2}'}}"
+f"{1:{f'{2}'}}"
+f"{1:{2}d}"
+
+f'{{\\"kind\\":\\"ConfigMap\\",\\"metadata\\":{{\\"annotations\\":{{}},\\"name\\":\\"cluster-info\\",\\"namespace\\":\\"amazon-cloudwatch\\"}}}}'
+
+f"""{'''
+'''}"""
+
+f"{'\''}"
+f"{f'\''}"
+
+f"{1}\{{"
+f"{2} foo \{{[\}}"
+f"\{3}"
+rf"\{"a"}"

crates/ruff_python_formatter/resources/test/fixtures/black/cases/preview_multiline_strings.py

@@ -173,3 +173,10 @@ this_will_also_become_one_line = (  # comment
     "b"
     "c"
 )
+
+assert some_var == expected_result, """
+test
+"""
+assert some_var == expected_result, f"""
+expected: {expected_result}
+actual: {some_var}"""

crates/ruff_python_formatter/resources/test/fixtures/black/cases/preview_multiline_strings.py.expect

@@ -207,3 +207,10 @@ this_will_stay_on_three_lines = (
 )
 
 this_will_also_become_one_line = "abc"  # comment
+
+assert some_var == expected_result, """
+test
+"""
+assert some_var == expected_result, f"""
+expected: {expected_result}
+actual: {some_var}"""

crates/ruff_python_formatter/resources/test/fixtures/black/cases/preview_pep646_typed_star_arg_type_var_tuple.options.json

@@ -0,0 +1 @@
+{"preview": "enabled", "target_version": "py311"}

crates/ruff_python_formatter/resources/test/fixtures/black/cases/preview_pep646_typed_star_arg_type_var_tuple.py

@@ -0,0 +1,5 @@
+def fn(*args: *tuple[*A, B]) -> None:
+    pass
+
+
+fn.__annotations__

crates/ruff_python_formatter/resources/test/fixtures/black/cases/preview_pep646_typed_star_arg_type_var_tuple.py.expect

@@ -0,0 +1,5 @@
+def fn(*args: *tuple[*A, B]) -> None:
+    pass
+
+
+fn.__annotations__

crates/ruff_python_formatter/resources/test/fixtures/black/cases/split_delimiter_comments.py

@@ -0,0 +1,23 @@
+a = (
+    1 +  # type: ignore
+    2  # type: ignore
+)
+a = (
+    1  # type: ignore
+    + 2  # type: ignore
+)
+bad_split3 = (
+    "What if we have inline comments on "  # First Comment
+    "each line of a bad split? In that "  # Second Comment
+    "case, we should just leave it alone."  # Third Comment
+)
+parametrize(
+    (
+        {},
+        {},
+    ),
+    (  # foobar
+        {},
+        {},
+    ),
+)

crates/ruff_python_formatter/resources/test/fixtures/black/cases/split_delimiter_comments.py.expect

@@ -0,0 +1,23 @@
+a = (
+    1  # type: ignore
+    + 2  # type: ignore
+)
+a = (
+    1  # type: ignore
+    + 2  # type: ignore
+)
+bad_split3 = (
+    "What if we have inline comments on "  # First Comment
+    "each line of a bad split? In that "  # Second Comment
+    "case, we should just leave it alone."  # Third Comment
+)
+parametrize(
+    (
+        {},
+        {},
+    ),
+    (  # foobar
+        {},
+        {},
+    ),
+)

crates/ruff_python_formatter/resources/test/fixtures/black/cases/type_param_defaults.options.json

@@ -0,0 +1 @@
+{"target_version": "py313"}

crates/ruff_python_formatter/resources/test/fixtures/black/cases/type_param_defaults.py

@@ -0,0 +1,19 @@
+type A[T=int] = float
+type B[*P=int] = float
+type C[*Ts=int] = float
+type D[*Ts=*int] = float
+type D[something_that_is_very_very_very_long=something_that_is_very_very_very_long] = float
+type D[*something_that_is_very_very_very_long=*something_that_is_very_very_very_long] = float
+type something_that_is_long[something_that_is_long=something_that_is_long] = something_that_is_long
+
+def simple[T=something_that_is_long](short1: int, short2: str, short3: bytes) -> float:
+    pass
+
+def longer[something_that_is_long=something_that_is_long](something_that_is_long: something_that_is_long) -> something_that_is_long:
+    pass
+
+def trailing_comma1[T=int,](a: str):
+    pass
+
+def trailing_comma2[T=int](a: str,):
+    pass

crates/ruff_python_formatter/resources/test/fixtures/black/cases/type_param_defaults.py.expect

@@ -0,0 +1,37 @@
+type A[T = int] = float
+type B[*P = int] = float
+type C[*Ts = int] = float
+type D[*Ts = *int] = float
+type D[
+    something_that_is_very_very_very_long = something_that_is_very_very_very_long
+] = float
+type D[
+    *something_that_is_very_very_very_long = *something_that_is_very_very_very_long
+] = float
+type something_that_is_long[
+    something_that_is_long = something_that_is_long
+] = something_that_is_long
+
+
+def simple[
+    T = something_that_is_long
+](short1: int, short2: str, short3: bytes) -> float:
+    pass
+
+
+def longer[
+    something_that_is_long = something_that_is_long
+](something_that_is_long: something_that_is_long) -> something_that_is_long:
+    pass
+
+
+def trailing_comma1[
+    T = int,
+](a: str):
+    pass
+
+
+def trailing_comma2[
+    T = int
+](a: str,):
+    pass

crates/ruff_python_formatter/resources/test/fixtures/import_black_tests.py

@@ -104,6 +104,9 @@ IGNORE_LIST = [
 
     # Uses a different output format
     "decorators.py",
+
+    # Tests line ranges that fall outside the source range. This is a CLI test case and not a formatting test case.
+    "line_ranges_outside_source.py",
 ]
 
 

crates/ruff_python_formatter/tests/snapshots/black_compatibility@cases__backslash_before_indent.py.snap

@@ -0,0 +1,60 @@
+---
+source: crates/ruff_python_formatter/tests/fixtures.rs
+input_file: crates/ruff_python_formatter/resources/test/fixtures/black/cases/backslash_before_indent.py
+---
+## Input
+
+```python
+class Plotter:
+\
+    pass
+
+class AnotherCase:
+  \
+    """Some
+    \
+    Docstring
+    """
+```
+
+## Black Differences
+
+```diff
+--- Black
++++ Ruff
+@@ -1,5 +1,4 @@
+ class Plotter:
+-
+     pass
+ 
+ 
+```
+
+## Ruff Output
+
+```python
+class Plotter:
+    pass
+
+
+class AnotherCase:
+    """Some
+    \
+    Docstring
+    """
+```
+
+## Black Output
+
+```python
+class Plotter:
+
+    pass
+
+
+class AnotherCase:
+    """Some
+    \
+    Docstring
+    """
+```

crates/ruff_python_formatter/tests/snapshots/black_compatibility@cases__comment_after_escaped_newline.py.snap

@@ -21,16 +21,16 @@ def bobtwo(): \
 ```diff
 --- Black
 +++ Ruff
-@@ -1,6 +1,8 @@
+@@ -1,8 +1,8 @@
 -def bob():  # pylint: disable=W9016
 +def bob():
 +    # pylint: disable=W9016
      pass
  
  
--def bobtwo():  # some comment here
-+def bobtwo():
-+    # some comment here
+ def bobtwo():
+-
+     # some comment here
      pass
 ```
 
@@ -54,8 +54,8 @@ def bob():  # pylint: disable=W9016
     pass
 
 
-def bobtwo():  # some comment here
+def bobtwo():
+
+    # some comment here
     pass
 ```
-
-

crates/ruff_python_formatter/tests/snapshots/black_compatibility@cases__dummy_implementations.py.snap

@@ -0,0 +1,399 @@
+---
+source: crates/ruff_python_formatter/tests/fixtures.rs
+input_file: crates/ruff_python_formatter/resources/test/fixtures/black/cases/dummy_implementations.py
+---
+## Input
+
+```python
+from typing import NoReturn, Protocol, Union, overload
+
+class Empty:
+    ...
+
+def dummy(a): ...
+async def other(b): ...
+
+
+@overload
+def a(arg: int) -> int: ...
+@overload
+def a(arg: str) -> str: ...
+@overload
+def a(arg: object) -> NoReturn: ...
+def a(arg: Union[int, str, object]) -> Union[int, str]:
+    if not isinstance(arg, (int, str)):
+        raise TypeError
+    return arg
+
+class Proto(Protocol):
+    def foo(self, a: int) -> int:
+        ...
+
+    def bar(self, b: str) -> str: ...
+    def baz(self, c: bytes) -> str:
+        ...
+
+
+def dummy_two():
+    ...
+@dummy
+def dummy_three():
+    ...
+
+def dummy_four():
+    ...
+
+@overload
+def b(arg: int) -> int: ...
+
+@overload
+def b(arg: str) -> str: ...
+@overload
+def b(arg: object) -> NoReturn: ...
+
+def b(arg: Union[int, str, object]) -> Union[int, str]:
+    if not isinstance(arg, (int, str)):
+        raise TypeError
+    return arg
+
+def has_comment():
+    ...  # still a dummy
+
+if some_condition:
+    ...
+
+if already_dummy: ...
+
+class AsyncCls:
+    async def async_method(self):
+        ...
+
+async def async_function(self):
+    ...
+
+@decorated
+async def async_function(self):
+    ...
+
+class ClassA:
+    def f(self):
+        
+        ...
+
+
+class ClassB:
+    def f(self):
+        
+        
+        
+        
+        
+        
+        
+        
+        
+        ...
+
+
+class ClassC:
+    def f(self):
+        
+        ...
+        # Comment
+
+
+class ClassD:
+    def f(self):# Comment 1
+        
+        ...# Comment 2
+        # Comment 3
+
+
+class ClassE:
+    def f(self):
+        
+        ...
+    def f2(self):
+        print(10)
+
+
+class ClassF:
+    def f(self):
+        
+        ...# Comment 2
+
+
+class ClassG:
+    def f(self):#Comment 1
+        
+        ...# Comment 2
+ 
+       
+class ClassH:
+    def f(self):
+        #Comment
+
+        ...
+```
+
+## Black Differences
+
+```diff
+--- Black
++++ Ruff
+@@ -82,14 +82,12 @@
+ 
+ class ClassC:
+     def f(self):
+-
+         ...
+         # Comment
+ 
+ 
+ class ClassD:
+     def f(self):  # Comment 1
+-
+         ...  # Comment 2
+         # Comment 3
+ 
+```
+
+## Ruff Output
+
+```python
+from typing import NoReturn, Protocol, Union, overload
+
+
+class Empty: ...
+
+
+def dummy(a): ...
+async def other(b): ...
+
+
+@overload
+def a(arg: int) -> int: ...
+@overload
+def a(arg: str) -> str: ...
+@overload
+def a(arg: object) -> NoReturn: ...
+def a(arg: Union[int, str, object]) -> Union[int, str]:
+    if not isinstance(arg, (int, str)):
+        raise TypeError
+    return arg
+
+
+class Proto(Protocol):
+    def foo(self, a: int) -> int: ...
+
+    def bar(self, b: str) -> str: ...
+    def baz(self, c: bytes) -> str: ...
+
+
+def dummy_two(): ...
+@dummy
+def dummy_three(): ...
+
+
+def dummy_four(): ...
+
+
+@overload
+def b(arg: int) -> int: ...
+
+
+@overload
+def b(arg: str) -> str: ...
+@overload
+def b(arg: object) -> NoReturn: ...
+
+
+def b(arg: Union[int, str, object]) -> Union[int, str]:
+    if not isinstance(arg, (int, str)):
+        raise TypeError
+    return arg
+
+
+def has_comment(): ...  # still a dummy
+
+
+if some_condition:
+    ...
+
+if already_dummy:
+    ...
+
+
+class AsyncCls:
+    async def async_method(self): ...
+
+
+async def async_function(self): ...
+
+
+@decorated
+async def async_function(self): ...
+
+
+class ClassA:
+    def f(self): ...
+
+
+class ClassB:
+    def f(self): ...
+
+
+class ClassC:
+    def f(self):
+        ...
+        # Comment
+
+
+class ClassD:
+    def f(self):  # Comment 1
+        ...  # Comment 2
+        # Comment 3
+
+
+class ClassE:
+    def f(self): ...
+    def f2(self):
+        print(10)
+
+
+class ClassF:
+    def f(self): ...  # Comment 2
+
+
+class ClassG:
+    def f(self):  # Comment 1
+        ...  # Comment 2
+
+
+class ClassH:
+    def f(self):
+        # Comment
+
+        ...
+```
+
+## Black Output
+
+```python
+from typing import NoReturn, Protocol, Union, overload
+
+
+class Empty: ...
+
+
+def dummy(a): ...
+async def other(b): ...
+
+
+@overload
+def a(arg: int) -> int: ...
+@overload
+def a(arg: str) -> str: ...
+@overload
+def a(arg: object) -> NoReturn: ...
+def a(arg: Union[int, str, object]) -> Union[int, str]:
+    if not isinstance(arg, (int, str)):
+        raise TypeError
+    return arg
+
+
+class Proto(Protocol):
+    def foo(self, a: int) -> int: ...
+
+    def bar(self, b: str) -> str: ...
+    def baz(self, c: bytes) -> str: ...
+
+
+def dummy_two(): ...
+@dummy
+def dummy_three(): ...
+
+
+def dummy_four(): ...
+
+
+@overload
+def b(arg: int) -> int: ...
+
+
+@overload
+def b(arg: str) -> str: ...
+@overload
+def b(arg: object) -> NoReturn: ...
+
+
+def b(arg: Union[int, str, object]) -> Union[int, str]:
+    if not isinstance(arg, (int, str)):
+        raise TypeError
+    return arg
+
+
+def has_comment(): ...  # still a dummy
+
+
+if some_condition:
+    ...
+
+if already_dummy:
+    ...
+
+
+class AsyncCls:
+    async def async_method(self): ...
+
+
+async def async_function(self): ...
+
+
+@decorated
+async def async_function(self): ...
+
+
+class ClassA:
+    def f(self): ...
+
+
+class ClassB:
+    def f(self): ...
+
+
+class ClassC:
+    def f(self):
+
+        ...
+        # Comment
+
+
+class ClassD:
+    def f(self):  # Comment 1
+
+        ...  # Comment 2
+        # Comment 3
+
+
+class ClassE:
+    def f(self): ...
+    def f2(self):
+        print(10)
+
+
+class ClassF:
+    def f(self): ...  # Comment 2
+
+
+class ClassG:
+    def f(self):  # Comment 1
+        ...  # Comment 2
+
+
+class ClassH:
+    def f(self):
+        # Comment
+
+        ...
+```

crates/ruff_python_formatter/tests/snapshots/black_compatibility@cases__form_feeds.py.snap

@@ -128,7 +128,7 @@ a = [
 ```diff
 --- Black
 +++ Ruff
-@@ -5,62 +5,62 @@
+@@ -5,63 +5,62 @@
  
  # Comment and statement processing is different enough that we'll test variations of both
  # contexts here
@@ -167,8 +167,9 @@ a = [
 +
  #
 -
-+
- #
+-#
+ 
++#
  
  #
  pass
@@ -211,7 +212,7 @@ a = [
  pass
  
  
-@@ -68,25 +68,23 @@
+@@ -69,25 +68,23 @@
  def foo():
      pass
  
@@ -385,6 +386,7 @@ a = []
 
 #
 
+
 #
 pass
 

crates/ruff_python_formatter/tests/snapshots/black_compatibility@cases__function_trailing_comma.py.snap

@@ -0,0 +1,569 @@
+---
+source: crates/ruff_python_formatter/tests/fixtures.rs
+input_file: crates/ruff_python_formatter/resources/test/fixtures/black/cases/function_trailing_comma.py
+---
+## Input
+
+```python
+def f(a,):
+    d = {'key': 'value',}
+    tup = (1,)
+
+def f2(a,b,):
+    d = {'key': 'value', 'key2': 'value2',}
+    tup = (1,2,)
+
+def f(a:int=1,):
+    call(arg={'explode': 'this',})
+    call2(arg=[1,2,3],)
+    x = {
+        "a": 1,
+        "b": 2,
+    }["a"]
+    if a == {"a": 1,"b": 2,"c": 3,"d": 4,"e": 5,"f": 6,"g": 7,"h": 8,}["a"]:
+        pass
+
+def xxxxxxxxxxxxxxxxxxxxxxxxxxxx() -> Set[
+    "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+]:
+    json = {"k": {"k2": {"k3": [1,]}}}
+
+
+
+# The type annotation shouldn't get a trailing comma since that would change its type.
+# Relevant bug report: https://github.com/psf/black/issues/2381.
+def some_function_with_a_really_long_name() -> (
+    returning_a_deeply_nested_import_of_a_type_i_suppose
+):
+    pass
+
+
+def some_method_with_a_really_long_name(very_long_parameter_so_yeah: str, another_long_parameter: int) -> (
+    another_case_of_returning_a_deeply_nested_import_of_a_type_i_suppose_cause_why_not
+):
+    pass
+
+
+def func() -> (
+    also_super_long_type_annotation_that_may_cause_an_AST_related_crash_in_black(this_shouldn_t_get_a_trailing_comma_too)
+):
+    pass
+
+
+def func() -> ((also_super_long_type_annotation_that_may_cause_an_AST_related_crash_in_black(
+        this_shouldn_t_get_a_trailing_comma_too
+    ))
+):
+    pass
+
+
+# Make sure inner one-element tuple won't explode
+some_module.some_function(
+    argument1, (one_element_tuple,), argument4, argument5, argument6
+)
+
+# Inner trailing comma causes outer to explode
+some_module.some_function(
+    argument1, (one, two,), argument4, argument5, argument6
+)
+
+def foo() -> (
+    # comment inside parenthesised return type
+    int
+):
+    ...
+
+def foo() -> (
+    # comment inside parenthesised return type
+    # more
+    int
+    # another
+):
+    ...
+
+def foo() -> (
+    # comment inside parenthesised new union return type
+    int | str | bytes
+):
+    ...
+
+def foo() -> (
+    # comment inside plain tuple
+):
+    pass
+
+def foo(arg: (# comment with non-return annotation
+        int
+        # comment with non-return annotation
+)):
+    pass
+
+def foo(arg: (# comment with non-return annotation
+        int | range | memoryview
+        # comment with non-return annotation
+)):
+    pass
+
+def foo(arg: (# only before
+        int
+)):
+    pass
+
+def foo(arg: (
+        int
+        # only after
+)):
+    pass
+
+variable: ( # annotation
+    because
+    # why not
+)
+
+variable: (
+    because
+    # why not
+)
+```
+
+## Black Differences
+
+```diff
+--- Black
++++ Ruff
+@@ -130,9 +130,7 @@
+ 
+ def foo() -> (
+     # comment inside parenthesised new union return type
+-    int
+-    | str
+-    | bytes
++    int | str | bytes
+ ): ...
+ 
+ 
+@@ -143,34 +141,31 @@
+ 
+ 
+ def foo(
+-    arg: (  # comment with non-return annotation
+-        int
+-        # comment with non-return annotation
+-    ),
++    # comment with non-return annotation
++    # comment with non-return annotation
++    arg: (int),
+ ):
+     pass
+ 
+ 
+ def foo(
+-    arg: (  # comment with non-return annotation
+-        int
+-        | range
+-        | memoryview
+-        # comment with non-return annotation
+-    ),
++    # comment with non-return annotation
++    # comment with non-return annotation
++    arg: (int | range | memoryview),
+ ):
+     pass
+ 
+ 
+-def foo(arg: int):  # only before
++def foo(
++    # only before
++    arg: (int),
++):
+     pass
+ 
+ 
+ def foo(
+-    arg: (
+-        int
+-        # only after
+-    ),
++    # only after
++    arg: (int),
+ ):
+     pass
+ 
+```
+
+## Ruff Output
+
+```python
+def f(
+    a,
+):
+    d = {
+        "key": "value",
+    }
+    tup = (1,)
+
+
+def f2(
+    a,
+    b,
+):
+    d = {
+        "key": "value",
+        "key2": "value2",
+    }
+    tup = (
+        1,
+        2,
+    )
+
+
+def f(
+    a: int = 1,
+):
+    call(
+        arg={
+            "explode": "this",
+        }
+    )
+    call2(
+        arg=[1, 2, 3],
+    )
+    x = {
+        "a": 1,
+        "b": 2,
+    }["a"]
+    if (
+        a
+        == {
+            "a": 1,
+            "b": 2,
+            "c": 3,
+            "d": 4,
+            "e": 5,
+            "f": 6,
+            "g": 7,
+            "h": 8,
+        }["a"]
+    ):
+        pass
+
+
+def xxxxxxxxxxxxxxxxxxxxxxxxxxxx() -> (
+    Set["xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"]
+):
+    json = {
+        "k": {
+            "k2": {
+                "k3": [
+                    1,
+                ]
+            }
+        }
+    }
+
+
+# The type annotation shouldn't get a trailing comma since that would change its type.
+# Relevant bug report: https://github.com/psf/black/issues/2381.
+def some_function_with_a_really_long_name() -> (
+    returning_a_deeply_nested_import_of_a_type_i_suppose
+):
+    pass
+
+
+def some_method_with_a_really_long_name(
+    very_long_parameter_so_yeah: str, another_long_parameter: int
+) -> another_case_of_returning_a_deeply_nested_import_of_a_type_i_suppose_cause_why_not:
+    pass
+
+
+def func() -> (
+    also_super_long_type_annotation_that_may_cause_an_AST_related_crash_in_black(
+        this_shouldn_t_get_a_trailing_comma_too
+    )
+):
+    pass
+
+
+def func() -> (
+    also_super_long_type_annotation_that_may_cause_an_AST_related_crash_in_black(
+        this_shouldn_t_get_a_trailing_comma_too
+    )
+):
+    pass
+
+
+# Make sure inner one-element tuple won't explode
+some_module.some_function(
+    argument1, (one_element_tuple,), argument4, argument5, argument6
+)
+
+# Inner trailing comma causes outer to explode
+some_module.some_function(
+    argument1,
+    (
+        one,
+        two,
+    ),
+    argument4,
+    argument5,
+    argument6,
+)
+
+
+def foo() -> (
+    # comment inside parenthesised return type
+    int
+): ...
+
+
+def foo() -> (
+    # comment inside parenthesised return type
+    # more
+    int
+    # another
+): ...
+
+
+def foo() -> (
+    # comment inside parenthesised new union return type
+    int | str | bytes
+): ...
+
+
+def foo() -> (
+    # comment inside plain tuple
+):
+    pass
+
+
+def foo(
+    # comment with non-return annotation
+    # comment with non-return annotation
+    arg: (int),
+):
+    pass
+
+
+def foo(
+    # comment with non-return annotation
+    # comment with non-return annotation
+    arg: (int | range | memoryview),
+):
+    pass
+
+
+def foo(
+    # only before
+    arg: (int),
+):
+    pass
+
+
+def foo(
+    # only after
+    arg: (int),
+):
+    pass
+
+
+variable: (  # annotation
+    because
+    # why not
+)
+
+variable: (
+    because
+    # why not
+)
+```
+
+## Black Output
+
+```python
+def f(
+    a,
+):
+    d = {
+        "key": "value",
+    }
+    tup = (1,)
+
+
+def f2(
+    a,
+    b,
+):
+    d = {
+        "key": "value",
+        "key2": "value2",
+    }
+    tup = (
+        1,
+        2,
+    )
+
+
+def f(
+    a: int = 1,
+):
+    call(
+        arg={
+            "explode": "this",
+        }
+    )
+    call2(
+        arg=[1, 2, 3],
+    )
+    x = {
+        "a": 1,
+        "b": 2,
+    }["a"]
+    if (
+        a
+        == {
+            "a": 1,
+            "b": 2,
+            "c": 3,
+            "d": 4,
+            "e": 5,
+            "f": 6,
+            "g": 7,
+            "h": 8,
+        }["a"]
+    ):
+        pass
+
+
+def xxxxxxxxxxxxxxxxxxxxxxxxxxxx() -> (
+    Set["xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"]
+):
+    json = {
+        "k": {
+            "k2": {
+                "k3": [
+                    1,
+                ]
+            }
+        }
+    }
+
+
+# The type annotation shouldn't get a trailing comma since that would change its type.
+# Relevant bug report: https://github.com/psf/black/issues/2381.
+def some_function_with_a_really_long_name() -> (
+    returning_a_deeply_nested_import_of_a_type_i_suppose
+):
+    pass
+
+
+def some_method_with_a_really_long_name(
+    very_long_parameter_so_yeah: str, another_long_parameter: int
+) -> another_case_of_returning_a_deeply_nested_import_of_a_type_i_suppose_cause_why_not:
+    pass
+
+
+def func() -> (
+    also_super_long_type_annotation_that_may_cause_an_AST_related_crash_in_black(
+        this_shouldn_t_get_a_trailing_comma_too
+    )
+):
+    pass
+
+
+def func() -> (
+    also_super_long_type_annotation_that_may_cause_an_AST_related_crash_in_black(
+        this_shouldn_t_get_a_trailing_comma_too
+    )
+):
+    pass
+
+
+# Make sure inner one-element tuple won't explode
+some_module.some_function(
+    argument1, (one_element_tuple,), argument4, argument5, argument6
+)
+
+# Inner trailing comma causes outer to explode
+some_module.some_function(
+    argument1,
+    (
+        one,
+        two,
+    ),
+    argument4,
+    argument5,
+    argument6,
+)
+
+
+def foo() -> (
+    # comment inside parenthesised return type
+    int
+): ...
+
+
+def foo() -> (
+    # comment inside parenthesised return type
+    # more
+    int
+    # another
+): ...
+
+
+def foo() -> (
+    # comment inside parenthesised new union return type
+    int
+    | str
+    | bytes
+): ...
+
+
+def foo() -> (
+    # comment inside plain tuple
+):
+    pass
+
+
+def foo(
+    arg: (  # comment with non-return annotation
+        int
+        # comment with non-return annotation
+    ),
+):
+    pass
+
+
+def foo(
+    arg: (  # comment with non-return annotation
+        int
+        | range
+        | memoryview
+        # comment with non-return annotation
+    ),
+):
+    pass
+
+
+def foo(arg: int):  # only before
+    pass
+
+
+def foo(
+    arg: (
+        int
+        # only after
+    ),
+):
+    pass
+
+
+variable: (  # annotation
+    because
+    # why not
+)
+
+variable: (
+    because
+    # why not
+)
+```

crates/ruff_python_formatter/tests/snapshots/black_compatibility@cases__pattern_matching_with_if_stmt.py.snap

@@ -0,0 +1,185 @@
+---
+source: crates/ruff_python_formatter/tests/fixtures.rs
+input_file: crates/ruff_python_formatter/resources/test/fixtures/black/cases/pattern_matching_with_if_stmt.py
+---
+## Input
+
+```python
+match match:
+    case "test" if case != "not very loooooooooooooog condition":  # comment
+        pass
+
+match smth:
+    case "test" if "any long condition" != "another long condition" and "this is a long condition":
+        pass
+    case test if "any long condition" != "another long condition" and "this is a looooong condition":
+        pass
+    case test if "any long condition" != "another long condition" and "this is a looooong condition":  # some additional comments
+        pass
+    case test if (True): # some comment
+        pass
+    case test if (False
+        ): # some comment
+        pass
+    case test if (True  # some comment
+        ):
+        pass  # some comment
+    case cases if (True  # some comment
+                   ): # some other comment
+        pass  # some comment
+    case match if (True  # some comment
+                   ):
+        pass  # some comment
+
+# case black_test_patma_052 (originally in the pattern_matching_complex test case)
+match x:
+    case [1, 0] if x := x[:0]:
+        y = 1
+    case [1, 0] if (x := x[:0]):
+        y = 1
+```
+
+## Black Differences
+
+```diff
+--- Black
++++ Ruff
+@@ -3,34 +3,36 @@
+         pass
+ 
+ match smth:
+-    case "test" if (
+-        "any long condition" != "another long condition" and "this is a long condition"
+-    ):
++    case "test" if "any long condition" != "another long condition" and "this is a long condition":
+         pass
+-    case test if (
+-        "any long condition" != "another long condition"
+-        and "this is a looooong condition"
+-    ):
++    case (
++        test
++    ) if "any long condition" != "another long condition" and "this is a looooong condition":
+         pass
+-    case test if (
+-        "any long condition" != "another long condition"
+-        and "this is a looooong condition"
+-    ):  # some additional comments
++    case (
++        test
++    ) if "any long condition" != "another long condition" and "this is a looooong condition":  # some additional comments
+         pass
+-    case test if True:  # some comment
++    case test if (True):  # some comment
+         pass
+-    case test if False:  # some comment
++    case test if (False):  # some comment
+         pass
+-    case test if True:  # some comment
++    case test if (
++        True  # some comment
++    ):
+         pass  # some comment
+-    case cases if True:  # some comment  # some other comment
++    case cases if (
++        True  # some comment
++    ):  # some other comment
+         pass  # some comment
+-    case match if True:  # some comment
++    case match if (
++        True  # some comment
++    ):
+         pass  # some comment
+ 
+ # case black_test_patma_052 (originally in the pattern_matching_complex test case)
+ match x:
+     case [1, 0] if x := x[:0]:
+         y = 1
+-    case [1, 0] if x := x[:0]:
++    case [1, 0] if (x := x[:0]):
+         y = 1
+```
+
+## Ruff Output
+
+```python
+match match:
+    case "test" if case != "not very loooooooooooooog condition":  # comment
+        pass
+
+match smth:
+    case "test" if "any long condition" != "another long condition" and "this is a long condition":
+        pass
+    case (
+        test
+    ) if "any long condition" != "another long condition" and "this is a looooong condition":
+        pass
+    case (
+        test
+    ) if "any long condition" != "another long condition" and "this is a looooong condition":  # some additional comments
+        pass
+    case test if (True):  # some comment
+        pass
+    case test if (False):  # some comment
+        pass
+    case test if (
+        True  # some comment
+    ):
+        pass  # some comment
+    case cases if (
+        True  # some comment
+    ):  # some other comment
+        pass  # some comment
+    case match if (
+        True  # some comment
+    ):
+        pass  # some comment
+
+# case black_test_patma_052 (originally in the pattern_matching_complex test case)
+match x:
+    case [1, 0] if x := x[:0]:
+        y = 1
+    case [1, 0] if (x := x[:0]):
+        y = 1
+```
+
+## Black Output
+
+```python
+match match:
+    case "test" if case != "not very loooooooooooooog condition":  # comment
+        pass
+
+match smth:
+    case "test" if (
+        "any long condition" != "another long condition" and "this is a long condition"
+    ):
+        pass
+    case test if (
+        "any long condition" != "another long condition"
+        and "this is a looooong condition"
+    ):
+        pass
+    case test if (
+        "any long condition" != "another long condition"
+        and "this is a looooong condition"
+    ):  # some additional comments
+        pass
+    case test if True:  # some comment
+        pass
+    case test if False:  # some comment
+        pass
+    case test if True:  # some comment
+        pass  # some comment
+    case cases if True:  # some comment  # some other comment
+        pass  # some comment
+    case match if True:  # some comment
+        pass  # some comment
+
+# case black_test_patma_052 (originally in the pattern_matching_complex test case)
+match x:
+    case [1, 0] if x := x[:0]:
+        y = 1
+    case [1, 0] if x := x[:0]:
+        y = 1
+```

crates/ruff_python_formatter/tests/snapshots/black_compatibility@cases__pep604_union_types_line_breaks.py.snap

@@ -26,7 +26,7 @@ z: (Short
 z: (int) = 2.3
 z: ((int)) = foo()
 
-# In case I go for not enforcing parentheses, this might get improved at the same time
+# In case I go for not enforcing parantheses, this might get improved at the same time
 x = (
     z
     == 9999999999999999999999999999999999999999
@@ -165,7 +165,7 @@ z: Short | Short2 | Short3 | Short4 = 8
 z: int = 2.3
 z: int = foo()
 
-# In case I go for not enforcing parentheses, this might get improved at the same time
+# In case I go for not enforcing parantheses, this might get improved at the same time
 x = (
     z
     == 9999999999999999999999999999999999999999
@@ -269,7 +269,7 @@ z: Short | Short2 | Short3 | Short4 = 8
 z: int = 2.3
 z: int = foo()
 
-# In case I go for not enforcing parentheses, this might get improved at the same time
+# In case I go for not enforcing parantheses, this might get improved at the same time
 x = (
     z
     == 9999999999999999999999999999999999999999

crates/ruff_python_formatter/tests/snapshots/black_compatibility@cases__pep_701.py.snap

@@ -0,0 +1,442 @@
+---
+source: crates/ruff_python_formatter/tests/fixtures.rs
+input_file: crates/ruff_python_formatter/resources/test/fixtures/black/cases/pep_701.py
+---
+## Input
+
+```python
+x = f"foo"
+x = f'foo'
+x = f"""foo"""
+x = f'''foo'''
+x = f"foo {{ bar {{ baz"
+x = f"foo {{ {2 + 2}bar {{ baz"
+x = f'foo {{ {2 + 2}bar {{ baz'
+x = f"""foo {{ {2 + 2}bar {{ baz"""
+x = f'''foo {{ {2 + 2}bar {{ baz'''
+
+# edge case: FSTRING_MIDDLE containing only whitespace should not be stripped
+x = f"{a} {b}"
+
+x = f"foo {
+    2 + 2
+} bar baz"
+
+x = f"foo {{ {"a  {2 + 2}  b"}bar {{ baz"
+x = f"foo {{ {f'a  {2 + 2}  b'}bar {{ baz"
+x = f"foo {{ {f"a  {2 + 2}  b"}bar {{ baz"
+
+x = f"foo {{ {f'a  {f"a  {2 + 2}  b"}  b'}bar {{ baz"
+x = f"foo {{ {f"a  {f"a  {2 + 2}  b"}  b"}bar {{ baz"
+
+x = """foo {{ {2 + 2}bar
+baz"""
+
+
+x = f"""foo {{ {2 + 2}bar {{ baz"""
+
+x = f"""foo {{ {
+    2 + 2
+}bar {{ baz"""
+
+
+x = f"""foo {{ {
+    2 + 2
+}bar
+baz"""
+
+x = f"""foo {{ a
+    foo {2 + 2}bar {{ baz
+
+    x = f"foo {{ {
+        2 + 2  # comment
+    }bar"
+
+    {{ baz
+
+    }} buzz
+
+    {print("abc" + "def"
+)}
+abc"""
+
+# edge case: end triple quotes at index zero
+f"""foo {2+2} bar
+"""
+
+f' \' {f"'"} \' '
+f" \" {f'"'} \" "
+
+x = f"a{2+2:=^72}b"
+x = f"a{2+2:x}b"
+
+rf'foo'
+rf'{foo}'
+
+f"{x:{y}d}"
+
+x = f"a{2+2:=^{x}}b"
+x = f"a{2+2:=^{foo(x+y**2):something else}}b"
+x = f"a{2+2:=^{foo(x+y**2):something else}one more}b"
+f'{(abc:=10)}'
+
+f"This is a really long string, but just make sure that you reflow fstrings {
+    2+2:d
+}"
+f"This is a really long string, but just make sure that you reflow fstrings correctly {2+2:d}"
+
+f"{2+2=}"
+f"{2+2    =    }"
+f"{     2      +     2    =    }"
+
+f"""foo {
+    datetime.datetime.now():%Y
+%m
+%d
+}"""
+
+f"{
+X
+!r
+}"
+
+raise ValueError(
+                "xxxxxxxxxxxIncorrect --line-ranges format, expect START-END, found"
+                f" {lines_str!r}"
+            )
+
+f"`escape` only permitted in {{'html', 'latex', 'latex-math'}}, \
+got {escape}"
+
+x = f'\N{GREEK CAPITAL LETTER DELTA} \N{SNOWMAN} {x}'
+fr'\{{\}}'
+
+f"""
+    WITH {f'''
+    {1}_cte AS ()'''}
+"""
+
+value: str = f'''foo
+'''
+
+log(
+    f"Received operation {server_operation.name} from "
+    f"{self.writer._transport.get_extra_info('peername')}",  # type: ignore[attr-defined]
+    level=0,
+)
+
+f"{1:{f'{2}'}}"
+f'{1:{f'{2}'}}'
+f'{1:{2}d}'
+
+f'{{\\"kind\\":\\"ConfigMap\\",\\"metadata\\":{{\\"annotations\\":{{}},\\"name\\":\\"cluster-info\\",\\"namespace\\":\\"amazon-cloudwatch\\"}}}}'
+
+f"""{'''
+'''}"""
+
+f"{'\''}"
+f"{f'\''}"
+
+f'{1}\{{'
+f'{2} foo \{{[\}}'
+f'\{3}'
+rf"\{"a"}"
+```
+
+## Black Differences
+
+```diff
+--- Black
++++ Ruff
+@@ -119,7 +119,7 @@
+ )
+ 
+ f"{1:{f'{2}'}}"
+-f"{1:{f'{2}'}}"
++f'{1:{f'{2}'}}'
+ f"{1:{2}d}"
+ 
+ f'{{\\"kind\\":\\"ConfigMap\\",\\"metadata\\":{{\\"annotations\\":{{}},\\"name\\":\\"cluster-info\\",\\"namespace\\":\\"amazon-cloudwatch\\"}}}}'
+```
+
+## Ruff Output
+
+```python
+x = f"foo"
+x = f"foo"
+x = f"""foo"""
+x = f"""foo"""
+x = f"foo {{ bar {{ baz"
+x = f"foo {{ {2 + 2}bar {{ baz"
+x = f"foo {{ {2 + 2}bar {{ baz"
+x = f"""foo {{ {2 + 2}bar {{ baz"""
+x = f"""foo {{ {2 + 2}bar {{ baz"""
+
+# edge case: FSTRING_MIDDLE containing only whitespace should not be stripped
+x = f"{a} {b}"
+
+x = f"foo {
+    2 + 2
+} bar baz"
+
+x = f"foo {{ {"a  {2 + 2}  b"}bar {{ baz"
+x = f"foo {{ {f'a  {2 + 2}  b'}bar {{ baz"
+x = f"foo {{ {f"a  {2 + 2}  b"}bar {{ baz"
+
+x = f"foo {{ {f'a  {f"a  {2 + 2}  b"}  b'}bar {{ baz"
+x = f"foo {{ {f"a  {f"a  {2 + 2}  b"}  b"}bar {{ baz"
+
+x = """foo {{ {2 + 2}bar
+baz"""
+
+
+x = f"""foo {{ {2 + 2}bar {{ baz"""
+
+x = f"""foo {{ {
+    2 + 2
+}bar {{ baz"""
+
+
+x = f"""foo {{ {
+    2 + 2
+}bar
+baz"""
+
+x = f"""foo {{ a
+    foo {2 + 2}bar {{ baz
+
+    x = f"foo {{ {
+        2 + 2  # comment
+    }bar"
+
+    {{ baz
+
+    }} buzz
+
+    {print("abc" + "def"
+)}
+abc"""
+
+# edge case: end triple quotes at index zero
+f"""foo {2+2} bar
+"""
+
+f' \' {f"'"} \' '
+f" \" {f'"'} \" "
+
+x = f"a{2+2:=^72}b"
+x = f"a{2+2:x}b"
+
+rf"foo"
+rf"{foo}"
+
+f"{x:{y}d}"
+
+x = f"a{2+2:=^{x}}b"
+x = f"a{2+2:=^{foo(x+y**2):something else}}b"
+x = f"a{2+2:=^{foo(x+y**2):something else}one more}b"
+f"{(abc:=10)}"
+
+f"This is a really long string, but just make sure that you reflow fstrings {
+    2+2:d
+}"
+f"This is a really long string, but just make sure that you reflow fstrings correctly {2+2:d}"
+
+f"{2+2=}"
+f"{2+2    =    }"
+f"{     2      +     2    =    }"
+
+f"""foo {
+    datetime.datetime.now():%Y
+%m
+%d
+}"""
+
+f"{
+X
+!r
+}"
+
+raise ValueError(
+    "xxxxxxxxxxxIncorrect --line-ranges format, expect START-END, found"
+    f" {lines_str!r}"
+)
+
+f"`escape` only permitted in {{'html', 'latex', 'latex-math'}}, \
+got {escape}"
+
+x = f"\N{GREEK CAPITAL LETTER DELTA} \N{SNOWMAN} {x}"
+rf"\{{\}}"
+
+f"""
+    WITH {f'''
+    {1}_cte AS ()'''}
+"""
+
+value: str = f"""foo
+"""
+
+log(
+    f"Received operation {server_operation.name} from "
+    f"{self.writer._transport.get_extra_info('peername')}",  # type: ignore[attr-defined]
+    level=0,
+)
+
+f"{1:{f'{2}'}}"
+f'{1:{f'{2}'}}'
+f"{1:{2}d}"
+
+f'{{\\"kind\\":\\"ConfigMap\\",\\"metadata\\":{{\\"annotations\\":{{}},\\"name\\":\\"cluster-info\\",\\"namespace\\":\\"amazon-cloudwatch\\"}}}}'
+
+f"""{'''
+'''}"""
+
+f"{'\''}"
+f"{f'\''}"
+
+f"{1}\{{"
+f"{2} foo \{{[\}}"
+f"\{3}"
+rf"\{"a"}"
+```
+
+## Black Output
+
+```python
+x = f"foo"
+x = f"foo"
+x = f"""foo"""
+x = f"""foo"""
+x = f"foo {{ bar {{ baz"
+x = f"foo {{ {2 + 2}bar {{ baz"
+x = f"foo {{ {2 + 2}bar {{ baz"
+x = f"""foo {{ {2 + 2}bar {{ baz"""
+x = f"""foo {{ {2 + 2}bar {{ baz"""
+
+# edge case: FSTRING_MIDDLE containing only whitespace should not be stripped
+x = f"{a} {b}"
+
+x = f"foo {
+    2 + 2
+} bar baz"
+
+x = f"foo {{ {"a  {2 + 2}  b"}bar {{ baz"
+x = f"foo {{ {f'a  {2 + 2}  b'}bar {{ baz"
+x = f"foo {{ {f"a  {2 + 2}  b"}bar {{ baz"
+
+x = f"foo {{ {f'a  {f"a  {2 + 2}  b"}  b'}bar {{ baz"
+x = f"foo {{ {f"a  {f"a  {2 + 2}  b"}  b"}bar {{ baz"
+
+x = """foo {{ {2 + 2}bar
+baz"""
+
+
+x = f"""foo {{ {2 + 2}bar {{ baz"""
+
+x = f"""foo {{ {
+    2 + 2
+}bar {{ baz"""
+
+
+x = f"""foo {{ {
+    2 + 2
+}bar
+baz"""
+
+x = f"""foo {{ a
+    foo {2 + 2}bar {{ baz
+
+    x = f"foo {{ {
+        2 + 2  # comment
+    }bar"
+
+    {{ baz
+
+    }} buzz
+
+    {print("abc" + "def"
+)}
+abc"""
+
+# edge case: end triple quotes at index zero
+f"""foo {2+2} bar
+"""
+
+f' \' {f"'"} \' '
+f" \" {f'"'} \" "
+
+x = f"a{2+2:=^72}b"
+x = f"a{2+2:x}b"
+
+rf"foo"
+rf"{foo}"
+
+f"{x:{y}d}"
+
+x = f"a{2+2:=^{x}}b"
+x = f"a{2+2:=^{foo(x+y**2):something else}}b"
+x = f"a{2+2:=^{foo(x+y**2):something else}one more}b"
+f"{(abc:=10)}"
+
+f"This is a really long string, but just make sure that you reflow fstrings {
+    2+2:d
+}"
+f"This is a really long string, but just make sure that you reflow fstrings correctly {2+2:d}"
+
+f"{2+2=}"
+f"{2+2    =    }"
+f"{     2      +     2    =    }"
+
+f"""foo {
+    datetime.datetime.now():%Y
+%m
+%d
+}"""
+
+f"{
+X
+!r
+}"
+
+raise ValueError(
+    "xxxxxxxxxxxIncorrect --line-ranges format, expect START-END, found"
+    f" {lines_str!r}"
+)
+
+f"`escape` only permitted in {{'html', 'latex', 'latex-math'}}, \
+got {escape}"
+
+x = f"\N{GREEK CAPITAL LETTER DELTA} \N{SNOWMAN} {x}"
+rf"\{{\}}"
+
+f"""
+    WITH {f'''
+    {1}_cte AS ()'''}
+"""
+
+value: str = f"""foo
+"""
+
+log(
+    f"Received operation {server_operation.name} from "
+    f"{self.writer._transport.get_extra_info('peername')}",  # type: ignore[attr-defined]
+    level=0,
+)
+
+f"{1:{f'{2}'}}"
+f"{1:{f'{2}'}}"
+f"{1:{2}d}"
+
+f'{{\\"kind\\":\\"ConfigMap\\",\\"metadata\\":{{\\"annotations\\":{{}},\\"name\\":\\"cluster-info\\",\\"namespace\\":\\"amazon-cloudwatch\\"}}}}'
+
+f"""{'''
+'''}"""
+
+f"{'\''}"
+f"{f'\''}"
+
+f"{1}\{{"
+f"{2} foo \{{[\}}"
+f"\{3}"
+rf"\{"a"}"
+```

crates/ruff_python_formatter/tests/snapshots/black_compatibility@cases__preview_multiline_strings.py.snap

@@ -180,6 +180,13 @@ this_will_also_become_one_line = (  # comment
     "b"
     "c"
 )
+
+assert some_var == expected_result, """
+test
+"""
+assert some_var == expected_result, f"""
+expected: {expected_result}
+actual: {some_var}"""
 ```
 
 ## Black Differences
@@ -368,7 +375,7 @@ this_will_also_become_one_line = (  # comment
  
  this_will_stay_on_three_lines = (
      "a"  # comment
-@@ -206,4 +247,6 @@
+@@ -206,7 +247,9 @@
      "c"
  )
  
@@ -376,6 +383,9 @@ this_will_also_become_one_line = (  # comment
 +this_will_also_become_one_line = (  # comment
 +    "a" "b" "c"
 +)
+ 
+ assert some_var == expected_result, """
+ test
 ```
 
 ## Ruff Output
@@ -633,6 +643,13 @@ this_will_stay_on_three_lines = (
 this_will_also_become_one_line = (  # comment
     "a" "b" "c"
 )
+
+assert some_var == expected_result, """
+test
+"""
+assert some_var == expected_result, f"""
+expected: {expected_result}
+actual: {some_var}"""
 ```
 
 ## Black Output
@@ -847,6 +864,11 @@ this_will_stay_on_three_lines = (
 )
 
 this_will_also_become_one_line = "abc"  # comment
+
+assert some_var == expected_result, """
+test
+"""
+assert some_var == expected_result, f"""
+expected: {expected_result}
+actual: {some_var}"""
 ```
-
-

crates/ruff_python_formatter/tests/snapshots/black_compatibility@cases__type_param_defaults.py.snap

@@ -0,0 +1,159 @@
+---
+source: crates/ruff_python_formatter/tests/fixtures.rs
+input_file: crates/ruff_python_formatter/resources/test/fixtures/black/cases/type_param_defaults.py
+---
+## Input
+
+```python
+type A[T=int] = float
+type B[*P=int] = float
+type C[*Ts=int] = float
+type D[*Ts=*int] = float
+type D[something_that_is_very_very_very_long=something_that_is_very_very_very_long] = float
+type D[*something_that_is_very_very_very_long=*something_that_is_very_very_very_long] = float
+type something_that_is_long[something_that_is_long=something_that_is_long] = something_that_is_long
+
+def simple[T=something_that_is_long](short1: int, short2: str, short3: bytes) -> float:
+    pass
+
+def longer[something_that_is_long=something_that_is_long](something_that_is_long: something_that_is_long) -> something_that_is_long:
+    pass
+
+def trailing_comma1[T=int,](a: str):
+    pass
+
+def trailing_comma2[T=int](a: str,):
+    pass
+```
+
+## Black Differences
+
+```diff
+--- Black
++++ Ruff
+@@ -8,20 +8,20 @@
+ type D[
+     *something_that_is_very_very_very_long = *something_that_is_very_very_very_long
+ ] = float
+-type something_that_is_long[
+-    something_that_is_long = something_that_is_long
+-] = something_that_is_long
++type something_that_is_long[something_that_is_long = something_that_is_long] = (
++    something_that_is_long
++)
+ 
+ 
+-def simple[
+-    T = something_that_is_long
+-](short1: int, short2: str, short3: bytes) -> float:
++def simple[T = something_that_is_long](
++    short1: int, short2: str, short3: bytes
++) -> float:
+     pass
+ 
+ 
+-def longer[
+-    something_that_is_long = something_that_is_long
+-](something_that_is_long: something_that_is_long) -> something_that_is_long:
++def longer[something_that_is_long = something_that_is_long](
++    something_that_is_long: something_that_is_long,
++) -> something_that_is_long:
+     pass
+ 
+ 
+@@ -31,7 +31,7 @@
+     pass
+ 
+ 
+-def trailing_comma2[
+-    T = int
+-](a: str,):
++def trailing_comma2[T = int](
++    a: str,
++):
+     pass
+```
+
+## Ruff Output
+
+```python
+type A[T = int] = float
+type B[*P = int] = float
+type C[*Ts = int] = float
+type D[*Ts = *int] = float
+type D[
+    something_that_is_very_very_very_long = something_that_is_very_very_very_long
+] = float
+type D[
+    *something_that_is_very_very_very_long = *something_that_is_very_very_very_long
+] = float
+type something_that_is_long[something_that_is_long = something_that_is_long] = (
+    something_that_is_long
+)
+
+
+def simple[T = something_that_is_long](
+    short1: int, short2: str, short3: bytes
+) -> float:
+    pass
+
+
+def longer[something_that_is_long = something_that_is_long](
+    something_that_is_long: something_that_is_long,
+) -> something_that_is_long:
+    pass
+
+
+def trailing_comma1[
+    T = int,
+](a: str):
+    pass
+
+
+def trailing_comma2[T = int](
+    a: str,
+):
+    pass
+```
+
+## Black Output
+
+```python
+type A[T = int] = float
+type B[*P = int] = float
+type C[*Ts = int] = float
+type D[*Ts = *int] = float
+type D[
+    something_that_is_very_very_very_long = something_that_is_very_very_very_long
+] = float
+type D[
+    *something_that_is_very_very_very_long = *something_that_is_very_very_very_long
+] = float
+type something_that_is_long[
+    something_that_is_long = something_that_is_long
+] = something_that_is_long
+
+
+def simple[
+    T = something_that_is_long
+](short1: int, short2: str, short3: bytes) -> float:
+    pass
+
+
+def longer[
+    something_that_is_long = something_that_is_long
+](something_that_is_long: something_that_is_long) -> something_that_is_long:
+    pass
+
+
+def trailing_comma1[
+    T = int,
+](a: str):
+    pass
+
+
+def trailing_comma2[
+    T = int
+](a: str,):
+    pass
+```