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import unittest
from types import MappingProxyType
from unittest import mock
from itemadapter.utils import get_field_meta_from_class
from tests import (
AttrsItem,
DataClassItem,
PydanticModel,
PydanticV1Model,
ScrapyItem,
ScrapySubclassedItem,
clear_itemadapter_imports,
make_mock_import,
)
class ScrapyItemTestCase(unittest.TestCase):
def test_false(self):
from itemadapter.adapter import ScrapyItemAdapter
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(DataClassItem()))
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))
try:
import attrs # noqa: F401 # pylint: disable=unused-import
except ImportError:
pass
else:
self.assertFalse(ScrapyItemAdapter.is_item(AttrsItem()))
if PydanticModel is not None:
self.assertFalse(ScrapyItemAdapter.is_item(PydanticModel()))
if PydanticV1Model is not None:
self.assertFalse(ScrapyItemAdapter.is_item(PydanticV1Model()))
@unittest.skipIf(not ScrapySubclassedItem, "scrapy module is not available")
@mock.patch("builtins.__import__", make_mock_import("scrapy"))
def test_module_import_error(self):
with clear_itemadapter_imports():
from itemadapter.adapter import ScrapyItemAdapter
self.assertFalse(
ScrapyItemAdapter.is_item(ScrapySubclassedItem(name="asdf", value=1234))
)
with self.assertRaises(
TypeError, msg="ScrapySubclassedItem is not a valid item class"
):
get_field_meta_from_class(ScrapySubclassedItem, "name")
@unittest.skipIf(not ScrapySubclassedItem, "scrapy module is not available")
@mock.patch("itemadapter.adapter._scrapy_item_classes", ())
def test_module_not_available(self):
from itemadapter.adapter import ScrapyItemAdapter
self.assertFalse(ScrapyItemAdapter.is_item(ScrapySubclassedItem(name="asdf", value=1234)))
with self.assertRaises(TypeError, msg="ScrapySubclassedItem is not a valid item class"):
get_field_meta_from_class(ScrapySubclassedItem, "name")
@unittest.skipIf(not ScrapySubclassedItem, "scrapy module is not available")
def test_true(self):
from itemadapter.adapter import ScrapyItemAdapter
self.assertTrue(ScrapyItemAdapter.is_item(ScrapyItem()))
self.assertTrue(ScrapyItemAdapter.is_item(ScrapySubclassedItem()))
self.assertTrue(ScrapyItemAdapter.is_item(ScrapySubclassedItem(name="asdf", value=1234)))
# field metadata
self.assertEqual(
get_field_meta_from_class(ScrapySubclassedItem, "name"),
MappingProxyType({"serializer": str}),
)
self.assertEqual(
get_field_meta_from_class(ScrapySubclassedItem, "value"),
MappingProxyType({"serializer": int}),
)
try:
import scrapy
except ImportError:
scrapy = None
class ScrapyDeprecatedBaseItemTestCase(unittest.TestCase):
"""Tests for deprecated classes. These will go away once the upstream classes are removed."""
@unittest.skipIf(
scrapy is None or not hasattr(scrapy.item, "_BaseItem"),
"scrapy.item._BaseItem not available",
)
def test_deprecated_underscore_baseitem(self):
from itemadapter.adapter import ScrapyItemAdapter
class SubClassed_BaseItem(scrapy.item._BaseItem):
pass
self.assertTrue(ScrapyItemAdapter.is_item(scrapy.item._BaseItem()))
self.assertTrue(ScrapyItemAdapter.is_item(SubClassed_BaseItem()))
@unittest.skipIf(
scrapy is None or not hasattr(scrapy.item, "BaseItem"),
"scrapy.item.BaseItem not available",
)
def test_deprecated_baseitem(self):
from itemadapter.adapter import ScrapyItemAdapter
class SubClassedBaseItem(scrapy.item.BaseItem):
pass
self.assertTrue(ScrapyItemAdapter.is_item(scrapy.item.BaseItem()))
self.assertTrue(ScrapyItemAdapter.is_item(SubClassedBaseItem()))
@unittest.skipIf(scrapy is None, "scrapy module is not available")
def test_removed_baseitem(self):
"""Mock the scrapy.item module so it does not contain the deprecated _BaseItem class."""
from itemadapter.adapter import ScrapyItemAdapter
class MockItemModule:
Item = ScrapyItem
with mock.patch("scrapy.item", MockItemModule):
self.assertFalse(ScrapyItemAdapter.is_item({}))
self.assertEqual(
get_field_meta_from_class(ScrapySubclassedItem, "name"),
MappingProxyType({"serializer": str}),
)
self.assertEqual(
get_field_meta_from_class(ScrapySubclassedItem, "value"),
MappingProxyType({"serializer": int}),
)
|
