Format Function definitions (#4951)

crates/ruff_python_formatter/resources/test/fixtures/ruff/statement/function.py

@@ -0,0 +1,70 @@
+# Dangling comments
+def test(
+    # comment
+
+    # another
+
+): ...
+
+
+# Argument empty line spacing
+def test(
+    # comment
+    a,
+
+    # another
+
+    b,
+): ...
+
+
+### Different function argument wrappings
+
+def single_line(aaaaaaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbb, ccccccccccccccccc):
+    pass
+
+def arguments_on_their_own_line(aaaaaaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbb, ccccccccccc, ddddddddddddd, eeeeeee):
+    pass
+
+def argument_per_line(aaaaaaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbb, ccccccccccccccccc, ddddddddddddd, eeeeeeeeeeeeeeee, ffffffffffff):
+    pass
+
+def last_pos_only_trailing_comma(a, b, /,):
+    pass
+
+def last_pos_no_trailing_comma(a, b, /):
+    pass
+
+
+def varg_with_leading_comments(
+    a, b,
+    # comment
+    *args
+): ...
+
+def kwarg_with_leading_comments(
+    a, b,
+    # comment
+    **kwargs
+): ...
+
+def argument_with_long_default(
+    a,
+    b = ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc + [
+        dddddddddddddddddddd, eeeeeeeeeeeeeeeeeeee, ffffffffffffffffffffffff
+    ],
+    h = []
+):  ...
+
+
+def argument_with_long_type_annotation(
+    a,
+    b: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx | yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy | zzzzzzzzzzzzzzzzzzz = [0, 1, 2, 3],
+    h = []
+):  ...
+
+
+def test(): ...
+
+# Comment
+def with_leading_comment(): ...