mirror of https://github.com/scrapy/scrapy.git
721 lines
26 KiB
Python
721 lines
26 KiB
Python
"""
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These tests are kept as references from the ones that were ported to a itemloaders library.
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Once we remove the references from scrapy, we can remove these tests.
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"""
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import unittest
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import warnings
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from functools import partial
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from itemloaders.processors import (Compose, Identity, Join,
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MapCompose, SelectJmes, TakeFirst)
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from scrapy.item import Item, Field
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from scrapy.loader import ItemLoader
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from scrapy.loader.common import wrap_loader_context
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from scrapy.utils.deprecate import ScrapyDeprecationWarning
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from scrapy.utils.misc import extract_regex
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# test items
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class NameItem(Item):
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name = Field()
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class TestItem(NameItem):
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url = Field()
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summary = Field()
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# test item loaders
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class NameItemLoader(ItemLoader):
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default_item_class = TestItem
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class TestItemLoader(NameItemLoader):
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name_in = MapCompose(lambda v: v.title())
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class DefaultedItemLoader(NameItemLoader):
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default_input_processor = MapCompose(lambda v: v[:-1])
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# test processors
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def processor_with_args(value, other=None, loader_context=None):
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if 'key' in loader_context:
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return loader_context['key']
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return value
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class BasicItemLoaderTest(unittest.TestCase):
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def test_load_item_using_default_loader(self):
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i = TestItem()
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i['summary'] = 'lala'
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il = ItemLoader(item=i)
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il.add_value('name', 'marta')
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item = il.load_item()
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assert item is i
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self.assertEqual(item['summary'], ['lala'])
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self.assertEqual(item['name'], ['marta'])
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def test_load_item_using_custom_loader(self):
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il = TestItemLoader()
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il.add_value('name', 'marta')
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item = il.load_item()
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self.assertEqual(item['name'], ['Marta'])
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def test_load_item_ignore_none_field_values(self):
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def validate_sku(value):
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# Let's assume a SKU is only digits.
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if value.isdigit():
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return value
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class MyLoader(ItemLoader):
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name_out = Compose(lambda vs: vs[0]) # take first which allows empty values
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price_out = Compose(TakeFirst(), float)
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sku_out = Compose(TakeFirst(), validate_sku)
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valid_fragment = 'SKU: 1234'
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invalid_fragment = 'SKU: not available'
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sku_re = 'SKU: (.+)'
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il = MyLoader(item={})
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# Should not return "sku: None".
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il.add_value('sku', [invalid_fragment], re=sku_re)
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# Should not ignore empty values.
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il.add_value('name', '')
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il.add_value('price', ['0'])
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self.assertEqual(il.load_item(), {
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'name': '',
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'price': 0.0,
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})
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il.replace_value('sku', [valid_fragment], re=sku_re)
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self.assertEqual(il.load_item()['sku'], '1234')
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def test_self_referencing_loader(self):
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class MyLoader(ItemLoader):
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url_out = TakeFirst()
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def img_url_out(self, values):
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return (self.get_output_value('url') or '') + values[0]
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il = MyLoader(item={})
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il.add_value('url', 'http://example.com/')
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il.add_value('img_url', '1234.png')
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self.assertEqual(il.load_item(), {
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'url': 'http://example.com/',
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'img_url': 'http://example.com/1234.png',
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})
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il = MyLoader(item={})
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il.add_value('img_url', '1234.png')
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self.assertEqual(il.load_item(), {
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'img_url': '1234.png',
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})
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def test_add_value(self):
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il = TestItemLoader()
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il.add_value('name', 'marta')
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self.assertEqual(il.get_collected_values('name'), ['Marta'])
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self.assertEqual(il.get_output_value('name'), ['Marta'])
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il.add_value('name', 'pepe')
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self.assertEqual(il.get_collected_values('name'), ['Marta', 'Pepe'])
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self.assertEqual(il.get_output_value('name'), ['Marta', 'Pepe'])
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# test add object value
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il.add_value('summary', {'key': 1})
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self.assertEqual(il.get_collected_values('summary'), [{'key': 1}])
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il.add_value(None, 'Jim', lambda x: {'name': x})
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self.assertEqual(il.get_collected_values('name'), ['Marta', 'Pepe', 'Jim'])
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def test_add_zero(self):
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il = NameItemLoader()
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il.add_value('name', 0)
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self.assertEqual(il.get_collected_values('name'), [0])
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def test_replace_value(self):
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il = TestItemLoader()
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il.replace_value('name', 'marta')
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self.assertEqual(il.get_collected_values('name'), ['Marta'])
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self.assertEqual(il.get_output_value('name'), ['Marta'])
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il.replace_value('name', 'pepe')
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self.assertEqual(il.get_collected_values('name'), ['Pepe'])
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self.assertEqual(il.get_output_value('name'), ['Pepe'])
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il.replace_value(None, 'Jim', lambda x: {'name': x})
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self.assertEqual(il.get_collected_values('name'), ['Jim'])
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def test_get_value(self):
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il = NameItemLoader()
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self.assertEqual('FOO', il.get_value(['foo', 'bar'], TakeFirst(), str.upper))
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self.assertEqual(['foo', 'bar'], il.get_value(['name:foo', 'name:bar'], re='name:(.*)$'))
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self.assertEqual('foo', il.get_value(['name:foo', 'name:bar'], TakeFirst(), re='name:(.*)$'))
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il.add_value('name', ['name:foo', 'name:bar'], TakeFirst(), re='name:(.*)$')
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self.assertEqual(['foo'], il.get_collected_values('name'))
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il.replace_value('name', 'name:bar', re='name:(.*)$')
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self.assertEqual(['bar'], il.get_collected_values('name'))
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def test_iter_on_input_processor_input(self):
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class NameFirstItemLoader(NameItemLoader):
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name_in = TakeFirst()
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il = NameFirstItemLoader()
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il.add_value('name', 'marta')
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self.assertEqual(il.get_collected_values('name'), ['marta'])
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il = NameFirstItemLoader()
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il.add_value('name', ['marta', 'jose'])
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self.assertEqual(il.get_collected_values('name'), ['marta'])
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il = NameFirstItemLoader()
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il.replace_value('name', 'marta')
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self.assertEqual(il.get_collected_values('name'), ['marta'])
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il = NameFirstItemLoader()
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il.replace_value('name', ['marta', 'jose'])
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self.assertEqual(il.get_collected_values('name'), ['marta'])
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il = NameFirstItemLoader()
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il.add_value('name', 'marta')
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il.add_value('name', ['jose', 'pedro'])
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self.assertEqual(il.get_collected_values('name'), ['marta', 'jose'])
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def test_map_compose_filter(self):
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def filter_world(x):
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return None if x == 'world' else x
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proc = MapCompose(filter_world, str.upper)
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self.assertEqual(proc(['hello', 'world', 'this', 'is', 'scrapy']),
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['HELLO', 'THIS', 'IS', 'SCRAPY'])
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def test_map_compose_filter_multil(self):
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class TestItemLoader(NameItemLoader):
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name_in = MapCompose(lambda v: v.title(), lambda v: v[:-1])
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il = TestItemLoader()
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il.add_value('name', 'marta')
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self.assertEqual(il.get_output_value('name'), ['Mart'])
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item = il.load_item()
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self.assertEqual(item['name'], ['Mart'])
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def test_default_input_processor(self):
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il = DefaultedItemLoader()
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il.add_value('name', 'marta')
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self.assertEqual(il.get_output_value('name'), ['mart'])
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def test_inherited_default_input_processor(self):
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class InheritDefaultedItemLoader(DefaultedItemLoader):
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pass
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il = InheritDefaultedItemLoader()
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il.add_value('name', 'marta')
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self.assertEqual(il.get_output_value('name'), ['mart'])
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def test_input_processor_inheritance(self):
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class ChildItemLoader(TestItemLoader):
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url_in = MapCompose(lambda v: v.lower())
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il = ChildItemLoader()
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il.add_value('url', 'HTTP://scrapy.ORG')
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self.assertEqual(il.get_output_value('url'), ['http://scrapy.org'])
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il.add_value('name', 'marta')
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self.assertEqual(il.get_output_value('name'), ['Marta'])
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class ChildChildItemLoader(ChildItemLoader):
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url_in = MapCompose(lambda v: v.upper())
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summary_in = MapCompose(lambda v: v)
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il = ChildChildItemLoader()
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il.add_value('url', 'http://scrapy.org')
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self.assertEqual(il.get_output_value('url'), ['HTTP://SCRAPY.ORG'])
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il.add_value('name', 'marta')
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self.assertEqual(il.get_output_value('name'), ['Marta'])
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def test_empty_map_compose(self):
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class IdentityDefaultedItemLoader(DefaultedItemLoader):
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name_in = MapCompose()
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il = IdentityDefaultedItemLoader()
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il.add_value('name', 'marta')
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self.assertEqual(il.get_output_value('name'), ['marta'])
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def test_identity_input_processor(self):
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class IdentityDefaultedItemLoader(DefaultedItemLoader):
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name_in = Identity()
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il = IdentityDefaultedItemLoader()
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il.add_value('name', 'marta')
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self.assertEqual(il.get_output_value('name'), ['marta'])
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def test_extend_custom_input_processors(self):
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class ChildItemLoader(TestItemLoader):
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name_in = MapCompose(TestItemLoader.name_in, str.swapcase)
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il = ChildItemLoader()
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il.add_value('name', 'marta')
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self.assertEqual(il.get_output_value('name'), ['mARTA'])
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def test_extend_default_input_processors(self):
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class ChildDefaultedItemLoader(DefaultedItemLoader):
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name_in = MapCompose(DefaultedItemLoader.default_input_processor, str.swapcase)
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il = ChildDefaultedItemLoader()
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il.add_value('name', 'marta')
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self.assertEqual(il.get_output_value('name'), ['MART'])
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def test_output_processor_using_function(self):
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il = TestItemLoader()
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il.add_value('name', ['mar', 'ta'])
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self.assertEqual(il.get_output_value('name'), ['Mar', 'Ta'])
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class TakeFirstItemLoader(TestItemLoader):
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name_out = " ".join
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il = TakeFirstItemLoader()
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il.add_value('name', ['mar', 'ta'])
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self.assertEqual(il.get_output_value('name'), 'Mar Ta')
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def test_output_processor_error(self):
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class TestItemLoader(ItemLoader):
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default_item_class = TestItem
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name_out = MapCompose(float)
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il = TestItemLoader()
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il.add_value('name', ['$10'])
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try:
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float('$10')
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except Exception as e:
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expected_exc_str = str(e)
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exc = None
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try:
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il.load_item()
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except Exception as e:
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exc = e
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assert isinstance(exc, ValueError)
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s = str(exc)
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assert 'name' in s, s
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assert '$10' in s, s
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assert 'ValueError' in s, s
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assert expected_exc_str in s, s
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def test_output_processor_using_classes(self):
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il = TestItemLoader()
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il.add_value('name', ['mar', 'ta'])
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self.assertEqual(il.get_output_value('name'), ['Mar', 'Ta'])
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class TakeFirstItemLoader(TestItemLoader):
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name_out = Join()
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il = TakeFirstItemLoader()
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il.add_value('name', ['mar', 'ta'])
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self.assertEqual(il.get_output_value('name'), 'Mar Ta')
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class TakeFirstItemLoader(TestItemLoader):
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name_out = Join("<br>")
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il = TakeFirstItemLoader()
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il.add_value('name', ['mar', 'ta'])
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self.assertEqual(il.get_output_value('name'), 'Mar<br>Ta')
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def test_default_output_processor(self):
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il = TestItemLoader()
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il.add_value('name', ['mar', 'ta'])
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self.assertEqual(il.get_output_value('name'), ['Mar', 'Ta'])
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class LalaItemLoader(TestItemLoader):
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default_output_processor = Identity()
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il = LalaItemLoader()
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il.add_value('name', ['mar', 'ta'])
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self.assertEqual(il.get_output_value('name'), ['Mar', 'Ta'])
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def test_loader_context_on_declaration(self):
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class ChildItemLoader(TestItemLoader):
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url_in = MapCompose(processor_with_args, key='val')
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il = ChildItemLoader()
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il.add_value('url', 'text')
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self.assertEqual(il.get_output_value('url'), ['val'])
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il.replace_value('url', 'text2')
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self.assertEqual(il.get_output_value('url'), ['val'])
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def test_loader_context_on_instantiation(self):
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class ChildItemLoader(TestItemLoader):
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url_in = MapCompose(processor_with_args)
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il = ChildItemLoader(key='val')
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il.add_value('url', 'text')
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self.assertEqual(il.get_output_value('url'), ['val'])
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il.replace_value('url', 'text2')
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self.assertEqual(il.get_output_value('url'), ['val'])
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def test_loader_context_on_assign(self):
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class ChildItemLoader(TestItemLoader):
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url_in = MapCompose(processor_with_args)
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il = ChildItemLoader()
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il.context['key'] = 'val'
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il.add_value('url', 'text')
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self.assertEqual(il.get_output_value('url'), ['val'])
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il.replace_value('url', 'text2')
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self.assertEqual(il.get_output_value('url'), ['val'])
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def test_item_passed_to_input_processor_functions(self):
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def processor(value, loader_context):
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return loader_context['item']['name']
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class ChildItemLoader(TestItemLoader):
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url_in = MapCompose(processor)
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it = TestItem(name='marta')
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il = ChildItemLoader(item=it)
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il.add_value('url', 'text')
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self.assertEqual(il.get_output_value('url'), ['marta'])
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il.replace_value('url', 'text2')
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self.assertEqual(il.get_output_value('url'), ['marta'])
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def test_compose_processor(self):
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class TestItemLoader(NameItemLoader):
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name_out = Compose(lambda v: v[0], lambda v: v.title(), lambda v: v[:-1])
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il = TestItemLoader()
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il.add_value('name', ['marta', 'other'])
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self.assertEqual(il.get_output_value('name'), 'Mart')
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item = il.load_item()
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self.assertEqual(item['name'], 'Mart')
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def test_partial_processor(self):
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def join(values, sep=None, loader_context=None, ignored=None):
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if sep is not None:
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return sep.join(values)
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elif loader_context and 'sep' in loader_context:
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return loader_context['sep'].join(values)
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else:
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return ''.join(values)
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class TestItemLoader(NameItemLoader):
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name_out = Compose(partial(join, sep='+'))
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url_out = Compose(partial(join, loader_context={'sep': '.'}))
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summary_out = Compose(partial(join, ignored='foo'))
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il = TestItemLoader()
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il.add_value('name', ['rabbit', 'hole'])
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il.add_value('url', ['rabbit', 'hole'])
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il.add_value('summary', ['rabbit', 'hole'])
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item = il.load_item()
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self.assertEqual(item['name'], 'rabbit+hole')
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self.assertEqual(item['url'], 'rabbit.hole')
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self.assertEqual(item['summary'], 'rabbithole')
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def test_error_input_processor(self):
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class TestItem(Item):
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name = Field()
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class TestItemLoader(ItemLoader):
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default_item_class = TestItem
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name_in = MapCompose(float)
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il = TestItemLoader()
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self.assertRaises(ValueError, il.add_value, 'name',
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['marta', 'other'])
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def test_error_output_processor(self):
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class TestItem(Item):
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name = Field()
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class TestItemLoader(ItemLoader):
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default_item_class = TestItem
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name_out = Compose(Join(), float)
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il = TestItemLoader()
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il.add_value('name', 'marta')
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with self.assertRaises(ValueError):
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il.load_item()
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def test_error_processor_as_argument(self):
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class TestItem(Item):
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name = Field()
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class TestItemLoader(ItemLoader):
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default_item_class = TestItem
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il = TestItemLoader()
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self.assertRaises(ValueError, il.add_value, 'name',
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['marta', 'other'], Compose(float))
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class InitializationFromDictTest(unittest.TestCase):
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item_class = dict
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def test_keep_single_value(self):
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"""Loaded item should contain values from the initial item"""
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input_item = self.item_class(name='foo')
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il = ItemLoader(item=input_item)
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loaded_item = il.load_item()
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self.assertIsInstance(loaded_item, self.item_class)
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self.assertEqual(dict(loaded_item), {'name': ['foo']})
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def test_keep_list(self):
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"""Loaded item should contain values from the initial item"""
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input_item = self.item_class(name=['foo', 'bar'])
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il = ItemLoader(item=input_item)
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loaded_item = il.load_item()
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self.assertIsInstance(loaded_item, self.item_class)
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self.assertEqual(dict(loaded_item), {'name': ['foo', 'bar']})
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def test_add_value_singlevalue_singlevalue(self):
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"""Values added after initialization should be appended"""
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input_item = self.item_class(name='foo')
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il = ItemLoader(item=input_item)
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il.add_value('name', 'bar')
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loaded_item = il.load_item()
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self.assertIsInstance(loaded_item, self.item_class)
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self.assertEqual(dict(loaded_item), {'name': ['foo', 'bar']})
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def test_add_value_singlevalue_list(self):
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"""Values added after initialization should be appended"""
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input_item = self.item_class(name='foo')
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il = ItemLoader(item=input_item)
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il.add_value('name', ['item', 'loader'])
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loaded_item = il.load_item()
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|
self.assertIsInstance(loaded_item, self.item_class)
|
|
self.assertEqual(dict(loaded_item), {'name': ['foo', 'item', 'loader']})
|
|
|
|
def test_add_value_list_singlevalue(self):
|
|
"""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):
|
|
"""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):
|
|
"""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, dict({'name': ['foo']}))
|
|
|
|
def test_get_output_value_list(self):
|
|
"""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, dict({'name': ['foo', 'bar']}))
|
|
|
|
def test_values_single(self):
|
|
"""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):
|
|
"""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 BaseNoInputReprocessingLoader(ItemLoader):
|
|
title_in = MapCompose(str.upper)
|
|
title_out = TakeFirst()
|
|
|
|
|
|
class NoInputReprocessingDictLoader(BaseNoInputReprocessingLoader):
|
|
default_item_class = dict
|
|
|
|
|
|
class NoInputReprocessingFromDictTest(unittest.TestCase):
|
|
"""
|
|
Loaders initialized from loaded items must not reprocess fields (dict instances)
|
|
"""
|
|
def test_avoid_reprocessing_with_initial_values_single(self):
|
|
il = NoInputReprocessingDictLoader(item=dict(title='foo'))
|
|
il_loaded = il.load_item()
|
|
self.assertEqual(il_loaded, dict(title='foo'))
|
|
self.assertEqual(NoInputReprocessingDictLoader(item=il_loaded).load_item(), dict(title='foo'))
|
|
|
|
def test_avoid_reprocessing_with_initial_values_list(self):
|
|
il = NoInputReprocessingDictLoader(item=dict(title=['foo', 'bar']))
|
|
il_loaded = il.load_item()
|
|
self.assertEqual(il_loaded, dict(title='foo'))
|
|
self.assertEqual(NoInputReprocessingDictLoader(item=il_loaded).load_item(), dict(title='foo'))
|
|
|
|
def test_avoid_reprocessing_without_initial_values_single(self):
|
|
il = NoInputReprocessingDictLoader()
|
|
il.add_value('title', 'foo')
|
|
il_loaded = il.load_item()
|
|
self.assertEqual(il_loaded, dict(title='FOO'))
|
|
self.assertEqual(NoInputReprocessingDictLoader(item=il_loaded).load_item(), dict(title='FOO'))
|
|
|
|
def test_avoid_reprocessing_without_initial_values_list(self):
|
|
il = NoInputReprocessingDictLoader()
|
|
il.add_value('title', ['foo', 'bar'])
|
|
il_loaded = il.load_item()
|
|
self.assertEqual(il_loaded, dict(title='FOO'))
|
|
self.assertEqual(NoInputReprocessingDictLoader(item=il_loaded).load_item(), dict(title='FOO'))
|
|
|
|
|
|
class TestOutputProcessorDict(unittest.TestCase):
|
|
def test_output_processor(self):
|
|
|
|
class TempDict(dict):
|
|
def __init__(self, *args, **kwargs):
|
|
super().__init__(self, *args, **kwargs)
|
|
self.setdefault('temp', 0.3)
|
|
|
|
class TempLoader(ItemLoader):
|
|
default_item_class = TempDict
|
|
default_input_processor = Identity()
|
|
default_output_processor = Compose(TakeFirst())
|
|
|
|
loader = TempLoader()
|
|
item = loader.load_item()
|
|
self.assertIsInstance(item, TempDict)
|
|
self.assertEqual(dict(item), {'temp': 0.3})
|
|
|
|
|
|
class ProcessorsTest(unittest.TestCase):
|
|
|
|
def test_take_first(self):
|
|
proc = TakeFirst()
|
|
self.assertEqual(proc([None, '', 'hello', 'world']), 'hello')
|
|
self.assertEqual(proc([None, '', 0, 'hello', 'world']), 0)
|
|
|
|
def test_identity(self):
|
|
proc = Identity()
|
|
self.assertEqual(proc([None, '', 'hello', 'world']),
|
|
[None, '', 'hello', 'world'])
|
|
|
|
def test_join(self):
|
|
proc = Join()
|
|
self.assertRaises(TypeError, proc, [None, '', 'hello', 'world'])
|
|
self.assertEqual(proc(['', 'hello', 'world']), ' hello world')
|
|
self.assertEqual(proc(['hello', 'world']), 'hello world')
|
|
self.assertIsInstance(proc(['hello', 'world']), str)
|
|
|
|
def test_compose(self):
|
|
proc = Compose(lambda v: v[0], str.upper)
|
|
self.assertEqual(proc(['hello', 'world']), 'HELLO')
|
|
proc = Compose(str.upper)
|
|
self.assertEqual(proc(None), None)
|
|
proc = Compose(str.upper, stop_on_none=False)
|
|
self.assertRaises(ValueError, proc, None)
|
|
proc = Compose(str.upper, lambda x: x + 1)
|
|
self.assertRaises(ValueError, proc, 'hello')
|
|
|
|
def test_mapcompose(self):
|
|
def filter_world(x):
|
|
return None if x == 'world' else x
|
|
proc = MapCompose(filter_world, str.upper)
|
|
self.assertEqual(proc(['hello', 'world', 'this', 'is', 'scrapy']),
|
|
['HELLO', 'THIS', 'IS', 'SCRAPY'])
|
|
proc = MapCompose(filter_world, str.upper)
|
|
self.assertEqual(proc(None), [])
|
|
proc = MapCompose(filter_world, str.upper)
|
|
self.assertRaises(ValueError, proc, [1])
|
|
proc = MapCompose(filter_world, lambda x: x + 1)
|
|
self.assertRaises(ValueError, proc, 'hello')
|
|
|
|
|
|
class SelectJmesTestCase(unittest.TestCase):
|
|
test_list_equals = {
|
|
'simple': ('foo.bar', {"foo": {"bar": "baz"}}, "baz"),
|
|
'invalid': ('foo.bar.baz', {"foo": {"bar": "baz"}}, None),
|
|
'top_level': ('foo', {"foo": {"bar": "baz"}}, {"bar": "baz"}),
|
|
'double_vs_single_quote_string': ('foo.bar', {"foo": {"bar": "baz"}}, "baz"),
|
|
'dict': (
|
|
'foo.bar[*].name',
|
|
{"foo": {"bar": [{"name": "one"}, {"name": "two"}]}},
|
|
['one', 'two']
|
|
),
|
|
'list': ('[1]', [1, 2], 2)
|
|
}
|
|
|
|
def test_output(self):
|
|
for tl in self.test_list_equals:
|
|
expr, test_list, expected = self.test_list_equals[tl]
|
|
test = SelectJmes(expr)(test_list)
|
|
self.assertEqual(
|
|
test,
|
|
expected,
|
|
msg=f'test "{tl}" got {test} expected {expected}'
|
|
)
|
|
|
|
|
|
# Functions as processors
|
|
|
|
def function_processor_strip(iterable):
|
|
return [x.strip() for x in iterable]
|
|
|
|
|
|
def function_processor_upper(iterable):
|
|
return [x.upper() for x in iterable]
|
|
|
|
|
|
class FunctionProcessorItem(Item):
|
|
foo = Field(
|
|
input_processor=function_processor_strip,
|
|
output_processor=function_processor_upper,
|
|
)
|
|
|
|
|
|
class FunctionProcessorDictLoader(ItemLoader):
|
|
default_item_class = dict
|
|
foo_in = function_processor_strip
|
|
foo_out = function_processor_upper
|
|
|
|
|
|
class FunctionProcessorTestCase(unittest.TestCase):
|
|
|
|
def test_processor_defined_in_item_loader(self):
|
|
lo = FunctionProcessorDictLoader()
|
|
lo.add_value('foo', ' bar ')
|
|
lo.add_value('foo', [' asdf ', ' qwerty '])
|
|
self.assertEqual(
|
|
dict(lo.load_item()),
|
|
{'foo': ['BAR', 'ASDF', 'QWERTY']}
|
|
)
|
|
|
|
|
|
class DeprecatedUtilityFunctionsTestCase(unittest.TestCase):
|
|
|
|
def test_deprecated_wrap_loader_context(self):
|
|
def function(*args):
|
|
return None
|
|
|
|
with warnings.catch_warnings(record=True) as w:
|
|
wrap_loader_context(function, context=dict())
|
|
|
|
assert len(w) == 1
|
|
assert issubclass(w[0].category, ScrapyDeprecationWarning)
|
|
|
|
def test_deprecated_extract_regex(self):
|
|
with warnings.catch_warnings(record=True) as w:
|
|
extract_regex(r'\w+', 'this is a test')
|
|
|
|
assert len(w) == 1
|
|
assert issubclass(w[0].category, ScrapyDeprecationWarning)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|