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"""Unittest for the type checker."""
import unittest
import sys
from astroid import test_utils
from pylint.checkers import typecheck
from pylint.testutils import CheckerTestCase, Message, set_config
def python33_and_newer(test):
"""
Decorator for any tests that will fail if launched not with Python 3.3+.
"""
return unittest.skipIf(sys.version_info < (3, 3),
'Python 3.2 and older')(test)
class TypeCheckerTest(CheckerTestCase):
"Tests for pylint.checkers.typecheck"
CHECKER_CLASS = typecheck.TypeChecker
def test_no_member_in_getattr(self):
"""Make sure that a module attribute access is checked by pylint.
"""
node = test_utils.extract_node("""
import optparse
optparse.THIS_does_not_EXIST
""")
with self.assertAddsMessages(
Message(
'no-member',
node=node,
args=('Module', 'optparse', 'THIS_does_not_EXIST'))):
self.checker.visit_attribute(node)
@set_config(ignored_modules=('argparse',))
def test_no_member_in_getattr_ignored(self):
"""Make sure that a module attribute access check is omitted with a
module that is configured to be ignored.
"""
node = test_utils.extract_node("""
import argparse
argparse.THIS_does_not_EXIST
""")
with self.assertNoMessages():
self.checker.visit_attribute(node)
@set_config(ignored_classes=('xml.etree.', ))
def test_ignored_modules_invalid_pattern(self):
node = test_utils.extract_node('''
import xml
xml.etree.Lala
''')
message = Message('no-member', node=node,
args=('Module', 'xml.etree', 'Lala'))
with self.assertAddsMessages(message):
self.checker.visit_attribute(node)
@set_config(ignored_modules=('xml.etree*', ))
def test_ignored_modules_patterns(self):
node = test_utils.extract_node('''
import xml
xml.etree.portocola #@
''')
with self.assertNoMessages():
self.checker.visit_attribute(node)
@set_config(ignored_classes=('xml.*', ))
def test_ignored_classes_no_recursive_pattern(self):
node = test_utils.extract_node('''
import xml
xml.etree.ElementTree.Test
''')
message = Message('no-member', node=node,
args=('Module', 'xml.etree.ElementTree', 'Test'))
with self.assertAddsMessages(message):
self.checker.visit_attribute(node)
@set_config(ignored_classes=('optparse.Values', ))
def test_ignored_classes_qualified_name(self):
"""Test that ignored-classes supports qualified name for ignoring."""
node = test_utils.extract_node('''
import optparse
optparse.Values.lala
''')
with self.assertNoMessages():
self.checker.visit_attribute(node)
@set_config(ignored_classes=('Values', ))
def test_ignored_classes_only_name(self):
"""Test that ignored_classes works with the name only."""
node = test_utils.extract_node('''
import optparse
optparse.Values.lala
''')
with self.assertNoMessages():
self.checker.visit_attribute(node)
class IterableTest(CheckerTestCase):
CHECKER_CLASS = typecheck.IterableChecker
def test_non_iterable_in_for(self):
node = test_utils.extract_node("""
for i in 42:
print(i)
""")
message = Message('not-an-iterable', node=node, args='42')
with self.assertAddsMessages(message):
self.checker.visit_for(node)
node = test_utils.extract_node("""
for i in [1,2,3]:
print(i)
""")
with self.assertNoMessages():
self.checker.visit_for(node)
node = test_utils.extract_node("""
def count():
i = 0
while True:
yield i
i += 1
for i in count():
print(i)
""")
with self.assertNoMessages():
self.walk(node.root())
node = test_utils.extract_node("""
for i in "aeiou":
print(i)
""")
with self.assertNoMessages():
self.checker.visit_for(node)
@python33_and_newer
def test_non_iterable_in_yield_from(self):
node = test_utils.extract_node("""
yield from 42
""")
message = Message('not-an-iterable', node=node, args='42')
with self.assertAddsMessages(message):
self.checker.visit_yieldfrom(node)
node = test_utils.extract_node("""
yield from [1,2,3]
""")
with self.assertNoMessages():
self.checker.visit_yieldfrom(node)
def test_non_iterable_in_funcall_starargs(self):
node = test_utils.extract_node("""
foo(*123)
""")
message = Message('not-an-iterable', node=node, args='123')
with self.assertAddsMessages(message):
self.checker.visit_call(node)
node = test_utils.extract_node("""
stuff = [1,2,3]
foo(*stuff)
""")
with self.assertNoMessages():
self.walk(node.root())
def test_non_mapping_in_funcall_kwargs(self):
node = test_utils.extract_node("""
foo(**123)
""")
message = Message('not-a-mapping', node=node, args='123')
with self.assertAddsMessages(message):
self.checker.visit_call(node)
node = test_utils.extract_node("""
foo(**retdict())
""")
with self.assertNoMessages():
self.walk(node.root())
def test_non_iterable_in_listcomp(self):
node = test_utils.extract_node("""
[x ** 2 for x in 10]
""")
message = Message('not-an-iterable', node=node, args='10')
with self.assertAddsMessages(message):
self.checker.visit_listcomp(node)
node = test_utils.extract_node("""
[x ** 2 for x in range(10)]
""")
with self.assertNoMessages():
self.checker.visit_listcomp(node)
def test_non_iterable_in_dictcomp(self):
node = test_utils.extract_node("""
{x: chr(x) for x in 256}
""")
message = Message('not-an-iterable', node=node, args='256')
with self.assertAddsMessages(message):
self.checker.visit_dictcomp(node)
node = test_utils.extract_node("""
{ord(x): x for x in "aoeui"}
""")
with self.assertNoMessages():
self.checker.visit_dictcomp(node)
def test_non_iterable_in_setcomp(self):
node = test_utils.extract_node("""
{2 ** x for x in 10}
""")
message = Message('not-an-iterable', node=node, args='10')
with self.assertAddsMessages(message):
self.checker.visit_setcomp(node)
node = test_utils.extract_node("""
{2 ** x for x in range(10)}
""")
with self.assertNoMessages():
self.checker.visit_setcomp(node)
def test_non_iterable_in_generator(self):
node = test_utils.extract_node("__(x for x in 123)")
message = Message('not-an-iterable', node=node, args='123')
with self.assertAddsMessages(message):
self.walk(node.root())
node = test_utils.extract_node("__(chr(x) for x in range(25))")
with self.assertNoMessages():
self.walk(node.root())
if __name__ == '__main__':
unittest.main()
|
