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"""Unit tests for the imports checker."""
import unittest
from astroid import test_utils
from pylint.checkers import imports
from pylint.testutils import CheckerTestCase, Message, set_config
class ImportsCheckerTC(CheckerTestCase):
CHECKER_CLASS = imports.ImportsChecker
@set_config(ignored_modules=('external_module',
'fake_module.submodule',
'foo',
'bar'))
def test_import_error_skipped(self):
"""Make sure that imports do not emit a 'import-error' when the
module is configured to be ignored."""
node = test_utils.extract_node("""
from external_module import anything
""")
with self.assertNoMessages():
self.checker.visit_importfrom(node)
node = test_utils.extract_node("""
from external_module.another_module import anything
""")
with self.assertNoMessages():
self.checker.visit_importfrom(node)
node = test_utils.extract_node("""
import external_module
""")
with self.assertNoMessages():
self.checker.visit_import(node)
node = test_utils.extract_node("""
from fake_module.submodule import anything
""")
with self.assertNoMessages():
self.checker.visit_importfrom(node)
node = test_utils.extract_node("""
from fake_module.submodule.deeper import anything
""")
with self.assertNoMessages():
self.checker.visit_importfrom(node)
node = test_utils.extract_node("""
import foo, bar
""")
msg = Message('multiple-imports', node=node, args='foo, bar')
with self.assertAddsMessages(msg):
self.checker.visit_import(node)
node = test_utils.extract_node("""
import foo
import bar
""")
with self.assertNoMessages():
self.checker.visit_import(node)
def test_visit_importfrom(self):
"""
Test that duplicate imports on single line raise 'reimported'.
"""
node = test_utils.extract_node('from time import sleep, sleep, time')
msg = Message(msg_id='reimported', node=node, args=('sleep', 1))
with self.assertAddsMessages(msg):
self.checker.visit_importfrom(node)
if __name__ == '__main__':
unittest.main()
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