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import unittest
from typing import Any, Protocol
from itemloaders import ItemLoader
class InitializationTestProtocol(Protocol):
item_class: Any
def assertEqual(self, first: Any, second: Any, msg: Any = ...) -> None: ...
def assertIsInstance(self, obj: object, cls: type, msg: Any = None) -> None: ...
class InitializationTestMixin:
item_class: Any = None
def test_keep_single_value(self: InitializationTestProtocol) -> None:
"""Loaded item should contain values from the initial item"""
input_item = self.item_class(name="foo")
il = ItemLoader(item=input_item)
loaded_item = il.load_item()
self.assertIsInstance(loaded_item, self.item_class)
self.assertEqual(dict(loaded_item), {"name": ["foo"]})
def test_keep_list(self: InitializationTestProtocol) -> None:
"""Loaded item should contain values from the initial item"""
input_item = self.item_class(name=["foo", "bar"])
il = ItemLoader(item=input_item)
loaded_item = il.load_item()
self.assertIsInstance(loaded_item, self.item_class)
self.assertEqual(dict(loaded_item), {"name": ["foo", "bar"]})
def test_add_value_singlevalue_singlevalue(
self: InitializationTestProtocol,
) -> None:
"""Values added after initialization should be appended"""
input_item = self.item_class(name="foo")
il = ItemLoader(item=input_item)
il.add_value("name", "bar")
loaded_item = il.load_item()
self.assertIsInstance(loaded_item, self.item_class)
self.assertEqual(dict(loaded_item), {"name": ["foo", "bar"]})
def test_add_value_singlevalue_list(self: InitializationTestProtocol) -> None:
"""Values added after initialization should be appended"""
input_item = self.item_class(name="foo")
il = ItemLoader(item=input_item)
il.add_value("name", ["item", "loader"])
loaded_item = il.load_item()
self.assertIsInstance(loaded_item, self.item_class)
self.assertEqual(dict(loaded_item), {"name": ["foo", "item", "loader"]})
def test_add_value_list_singlevalue(self: InitializationTestProtocol) -> None:
"""Values added after initialization should be appended"""
input_item = self.item_class(name=["foo", "bar"])
il = ItemLoader(item=input_item)
il.add_value("name", "qwerty")
loaded_item = il.load_item()
self.assertIsInstance(loaded_item, self.item_class)
self.assertEqual(dict(loaded_item), {"name": ["foo", "bar", "qwerty"]})
def test_add_value_list_list(self: InitializationTestProtocol) -> None:
"""Values added after initialization should be appended"""
input_item = self.item_class(name=["foo", "bar"])
il = ItemLoader(item=input_item)
il.add_value("name", ["item", "loader"])
loaded_item = il.load_item()
self.assertIsInstance(loaded_item, self.item_class)
self.assertEqual(dict(loaded_item), {"name": ["foo", "bar", "item", "loader"]})
def test_get_output_value_singlevalue(self: InitializationTestProtocol) -> None:
"""Getting output value must not remove value from item"""
input_item = self.item_class(name="foo")
il = ItemLoader(item=input_item)
self.assertEqual(il.get_output_value("name"), ["foo"])
loaded_item = il.load_item()
self.assertIsInstance(loaded_item, self.item_class)
self.assertEqual(loaded_item, {"name": ["foo"]})
def test_get_output_value_list(self: InitializationTestProtocol) -> None:
"""Getting output value must not remove value from item"""
input_item = self.item_class(name=["foo", "bar"])
il = ItemLoader(item=input_item)
self.assertEqual(il.get_output_value("name"), ["foo", "bar"])
loaded_item = il.load_item()
self.assertIsInstance(loaded_item, self.item_class)
self.assertEqual(loaded_item, {"name": ["foo", "bar"]})
def test_values_single(self: InitializationTestProtocol) -> None:
"""Values from initial item must be added to loader._values"""
input_item = self.item_class(name="foo")
il = ItemLoader(item=input_item)
self.assertEqual(il._values.get("name"), ["foo"])
def test_values_list(self: InitializationTestProtocol) -> None:
"""Values from initial item must be added to loader._values"""
input_item = self.item_class(name=["foo", "bar"])
il = ItemLoader(item=input_item)
self.assertEqual(il._values.get("name"), ["foo", "bar"])
class InitializationFromDictTest(InitializationTestMixin, unittest.TestCase):
item_class = dict
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