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# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/master/LICENSE
import warnings
import astroid
from pylint.checkers.utils import check_messages
from pylint.utils import ASTWalker
class TestASTWalker:
class MockLinter:
def __init__(self, msgs):
self._msgs = msgs
def is_message_enabled(self, msgid):
return self._msgs.get(msgid, True)
class Checker:
def __init__(self):
self.called = set()
@check_messages("first-message")
def visit_module(self, module): # pylint: disable=unused-argument
self.called.add("module")
@check_messages("second-message")
def visit_call(self, module):
raise NotImplementedError
@check_messages("second-message", "third-message")
def visit_assignname(self, module): # pylint: disable=unused-argument
self.called.add("assignname")
@check_messages("second-message")
def leave_assignname(self, module):
raise NotImplementedError
def test_check_messages(self):
linter = self.MockLinter(
{"first-message": True, "second-message": False, "third-message": True}
)
walker = ASTWalker(linter)
checker = self.Checker()
walker.add_checker(checker)
walker.walk(astroid.parse("x = func()"))
assert {"module", "assignname"} == checker.called
def test_deprecated_methods(self):
class Checker:
def __init__(self):
self.called = False
@check_messages("first-message")
def visit_assname(self, node): # pylint: disable=unused-argument
self.called = True
linter = self.MockLinter({"first-message": True})
walker = ASTWalker(linter)
checker = Checker()
walker.add_checker(checker)
with warnings.catch_warnings(record=True):
warnings.simplefilter("always")
walker.walk(astroid.parse("x = 1"))
assert not checker.called
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