def test_deprecated_is_instance(self):
from itemadapter.utils import is_attrs_instance
with warnings.catch_warnings(record=True) as caught:
is_attrs_instance(1)
self.assertEqual(len(caught), 1)
self.assertTrue(issubclass(caught[0].category, DeprecationWarning))
self.assertEqual(
"itemadapter.utils.is_attrs_instance is deprecated"
" and it will be removed in a future version",
str(caught[0].message),
)
def test_true(self):
self.assertTrue(is_attrs_instance(AttrsItem()))
self.assertTrue(is_attrs_instance(AttrsItem(name="asdf", value=1234)))
def test_false(self):
self.assertFalse(is_attrs_instance(int))
self.assertFalse(is_attrs_instance(sum))
self.assertFalse(is_attrs_instance(1234))
self.assertFalse(is_attrs_instance(object()))
self.assertFalse(is_attrs_instance(ScrapyItem()))
self.assertFalse(is_attrs_instance(ScrapySubclassedItem()))
self.assertFalse(is_attrs_instance("a string"))
self.assertFalse(is_attrs_instance(b"some bytes"))
self.assertFalse(is_attrs_instance({"a": "dict"}))
self.assertFalse(is_attrs_instance(["a", "list"]))
self.assertFalse(is_attrs_instance(("a", "tuple")))
self.assertFalse(is_attrs_instance({"a", "set"}))
self.assertFalse(is_attrs_instance(AttrsItem))
def test_module_not_available(self):
self.assertFalse(is_attrs_instance(AttrsItem(name="asdf", value=1234)))
def is_item(cls, item: Any) -> bool:
return is_attrs_instance(item)