def test_true(self):
self.assertTrue(DataclassAdapter.is_item(DataClassItem()))
self.assertTrue(
DataclassAdapter.is_item(DataClassItem(name="asdf", value=1234)))
# field metadata
self.assertEqual(get_field_meta_from_class(DataClassItem, "name"),
MappingProxyType({"serializer": str}))
self.assertEqual(
get_field_meta_from_class(DataClassItem, "value"),
MappingProxyType({"serializer": int}),
)
with self.assertRaises(
KeyError,
msg="DataClassItem does not support field: non_existent"):
get_field_meta_from_class(DataClassItem, "non_existent")
def test_repr_dataclass(self):
item = DataClassItem(name="asdf", value=1234)
adapter = ItemAdapter(item)
self.assertEqual(
repr(adapter),
"<ItemAdapter for DataClassItem(name='asdf', value=1234)>",
)
def test_false(self):
self.assertFalse(ScrapyItemAdapter.is_item(int))
self.assertFalse(ScrapyItemAdapter.is_item(sum))
self.assertFalse(ScrapyItemAdapter.is_item(1234))
self.assertFalse(ScrapyItemAdapter.is_item(object()))
self.assertFalse(ScrapyItemAdapter.is_item(AttrsItem()))
self.assertFalse(ScrapyItemAdapter.is_item(DataClassItem()))
self.assertFalse(ScrapyItemAdapter.is_item(PydanticModel()))
self.assertFalse(ScrapyItemAdapter.is_item("a string"))
self.assertFalse(ScrapyItemAdapter.is_item(b"some bytes"))
self.assertFalse(ScrapyItemAdapter.is_item({"a": "dict"}))
self.assertFalse(ScrapyItemAdapter.is_item(["a", "list"]))
self.assertFalse(ScrapyItemAdapter.is_item(("a", "tuple")))
self.assertFalse(ScrapyItemAdapter.is_item({"a", "set"}))
self.assertFalse(ScrapyItemAdapter.is_item(ScrapySubclassedItem))
def test_true_dataclass(self):
self.assertTrue(is_item(DataClassItem(name="asdf", value=1234)))
self.assertTrue(ItemAdapter.is_item_class(DataClassItem))
def test_true(self):
self.assertTrue(is_dataclass_instance(DataClassItem()))
self.assertTrue(
is_dataclass_instance(DataClassItem(name="asdf", value=1234)))
def test_module_not_available(self):
self.assertFalse(
is_dataclass_instance(DataClassItem(name="asdf", value=1234)))
def test_module_not_available(self):
self.assertFalse(
DataclassAdapter.is_item(DataClassItem(name="asdf", value=1234)))
with self.assertRaises(TypeError,
msg="DataClassItem is not a valid item class"):
get_field_meta_from_class(DataClassItem, "name")