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gh-71339: Add additional assertion methods for unittest (GH-128707)

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Add the following methods:

* assertHasAttr() and assertNotHasAttr()
* assertIsSubclass() and assertNotIsSubclass()
* assertStartsWith() and assertNotStartsWith()
* assertEndsWith() and assertNotEndsWith()

Also improve error messages for assertIsInstance() and
assertNotIsInstance().
This commit is contained in:
Serhiy Storchaka 2025-01-14 10:02:38 +02:00 • committed by GitHub
parent 41f73501ec
commit 06cad77a5b
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20 changed files with 555 additions and 100 deletions
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18
Lib/test/test_typing.py
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@ -59,20 +59,6 @@ CANNOT_SUBCLASS_INSTANCE = 'Cannot subclass an instance of %s'
class BaseTestCase(TestCase):
def assertIsSubclass(self, cls, class_or_tuple, msg=None):
if not issubclass(cls, class_or_tuple):
message = '%r is not a subclass of %r' % (cls, class_or_tuple)
if msg is not None:
message += ' : %s' % msg
raise self.failureException(message)
def assertNotIsSubclass(self, cls, class_or_tuple, msg=None):
if issubclass(cls, class_or_tuple):
message = '%r is a subclass of %r' % (cls, class_or_tuple)
if msg is not None:
message += ' : %s' % msg
raise self.failureException(message)
def clear_caches(self):
for f in typing._cleanups:
f()
@ -1252,10 +1238,6 @@ class UnpackTests(BaseTestCase):
class TypeVarTupleTests(BaseTestCase):
def assertEndsWith(self, string, tail):
if not string.endswith(tail):
self.fail(f"String {string!r} does not end with {tail!r}")
def test_name(self):
Ts = TypeVarTuple('Ts')
self.assertEqual(Ts.__name__, 'Ts')