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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 import parse_module
from libcst.codemod import CodemodContext, CodemodTest
from libcst.codemod.visitors import GatherGlobalNamesVisitor
from libcst.testing.utils import UnitTest
class TestGatherGlobalNamesVisitor(UnitTest):
def gather_global_names(self, code: str) -> GatherGlobalNamesVisitor:
transform_instance = GatherGlobalNamesVisitor(
CodemodContext(full_module_name="a.b.foobar")
)
input_tree = parse_module(CodemodTest.make_fixture_data(code))
input_tree.visit(transform_instance)
return transform_instance
def test_gather_nothing(self) -> None:
code = """
from a import b
b()
"""
gatherer = self.gather_global_names(code)
self.assertEqual(gatherer.global_names, set())
self.assertEqual(gatherer.class_names, set())
self.assertEqual(gatherer.function_names, set())
def test_globals(self) -> None:
code = """
x = 1
y = 2
def foo(): pass
class Foo: pass
"""
gatherer = self.gather_global_names(code)
self.assertEqual(gatherer.global_names, {"x", "y"})
self.assertEqual(gatherer.class_names, {"Foo"})
self.assertEqual(gatherer.function_names, {"foo"})
def test_omit_nested(self) -> None:
code = """
def foo():
x = 1
class Foo:
def method(self): pass
"""
gatherer = self.gather_global_names(code)
self.assertEqual(gatherer.global_names, set())
self.assertEqual(gatherer.class_names, {"Foo"})
self.assertEqual(gatherer.function_names, {"foo"})
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