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# Copyright (c) Meta Platforms, Inc. and affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
#
from libcst.codemod import CodemodTest
from libcst.codemod.commands.remove_unused_imports import RemoveUnusedImportsCommand
class RemoveUnusedImportsCommandTest(CodemodTest):
TRANSFORM = RemoveUnusedImportsCommand
def test_simple_case(self) -> None:
before = "import a, b\na()"
after = "import a\na()"
self.assertCodemod(before, after)
def test_double_import(self) -> None:
before = "import a\nimport a\na()"
self.assertCodemod(before, before)
def test_conditional_import(self) -> None:
before = """
if True:
import a
else:
import b as a
a()
"""
self.assertCodemod(before, before)
def test_unused_in_conditional(self) -> None:
before = """
if False:
import a
"""
after = """
if False:
pass
"""
self.assertCodemod(before, after)
def test_type_annotations(self) -> None:
before = """
import a
x: a = 1
"""
self.assertCodemod(before, before)
def test_dotted_imports(self) -> None:
before = """
import a.b, a.b.c
import e.f
import g.h
import x.y, x.y.z
def foo() -> None:
a.b
e.g
g.h.i
x.y.z
"""
after = """
import a.b, a.b.c
import e.f
import g.h
import x.y.z
def foo() -> None:
a.b
e.g
g.h.i
x.y.z
"""
self.assertCodemod(before, after)
def test_enclosed_attributes(self) -> None:
before = """
from a.b import c
import x
def foo() -> None:
x.y(c.d()).z()
"""
self.assertCodemod(before, before)
def test_access_in_assignment(self) -> None:
before = """
from a import b
b(0)[x] = False
"""
self.assertCodemod(before, before)
def test_no_formatting_if_no_unused_imports(self) -> None:
before = """
from m import (a, b,)
a(b, 'look at these ugly quotes')
"""
self.assertCodemod(before, before)
def test_suppression_on_first_line_of_multiline_import_refers_to_whole_block(
self,
) -> None:
before = """
from a import ( # lint-ignore: unused-import
b,
c,
)
"""
self.assertCodemod(before, before)
def test_suppression(self) -> None:
before = """
# noqa
import a, b
import c
from x import (
y,
z, # noqa
)
"""
after = """
# noqa
import a, b
from x import (
z, # noqa
)
"""
self.assertCodemod(before, after)
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