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import unittest
from scrapy.item import Item, Field
class ItemTest(unittest.TestCase):
def assertSortedEqual(self, first, second, msg=None):
return self.assertEqual(sorted(first), sorted(second), msg)
def test_simple(self):
class TestItem(Item):
name = Field()
i = TestItem()
i['name'] = u'name'
self.assertEqual(i['name'], u'name')
def test_init(self):
class TestItem(Item):
name = Field()
i = TestItem()
self.assertRaises(KeyError, i.__getitem__, 'name')
i2 = TestItem(name=u'john doe')
self.assertEqual(i2['name'], u'john doe')
i3 = TestItem({'name': u'john doe'})
self.assertEqual(i3['name'], u'john doe')
i4 = TestItem(i3)
self.assertEqual(i4['name'], u'john doe')
self.assertRaises(KeyError, TestItem, {'name': u'john doe',
'other': u'foo'})
def test_invalid_field(self):
class TestItem(Item):
pass
i = TestItem()
self.assertRaises(KeyError, i.__setitem__, 'field', 'text')
self.assertRaises(KeyError, i.__getitem__, 'field')
def test_repr(self):
class TestItem(Item):
name = Field()
number = Field()
i = TestItem()
i['name'] = u'John Doe'
i['number'] = 123
itemrepr = repr(i)
self.assertEqual(itemrepr,
"{'name': u'John Doe', 'number': 123}")
i2 = eval(itemrepr)
self.assertEqual(i2['name'], 'John Doe')
self.assertEqual(i2['number'], 123)
def test_private_attr(self):
class TestItem(Item):
name = Field()
i = TestItem()
i._private = 'test'
self.assertEqual(i._private, 'test')
def test_raise_getattr(self):
class TestItem(Item):
name = Field()
i = TestItem()
self.assertRaises(AttributeError, getattr, i, 'name')
def test_raise_setattr(self):
class TestItem(Item):
name = Field()
i = TestItem()
self.assertRaises(AttributeError, setattr, i, 'name', 'john')
def test_custom_methods(self):
class TestItem(Item):
name = Field()
def get_name(self):
return self['name']
def change_name(self, name):
self['name'] = name
i = TestItem()
self.assertRaises(KeyError, i.get_name)
i['name'] = u'lala'
self.assertEqual(i.get_name(), u'lala')
i.change_name(u'other')
self.assertEqual(i.get_name(), 'other')
def test_metaclass(self):
class TestItem(Item):
name = Field()
keys = Field()
values = Field()
i = TestItem()
i['name'] = u'John'
self.assertEqual(i.keys(), ['name'])
self.assertEqual(i.values(), ['John'])
i['keys'] = u'Keys'
i['values'] = u'Values'
self.assertSortedEqual(i.keys(), ['keys', 'values', 'name'])
self.assertSortedEqual(i.values(), [u'Keys', u'Values', u'John'])
def test_metaclass_inheritance(self):
class BaseItem(Item):
name = Field()
keys = Field()
values = Field()
class TestItem(BaseItem):
keys = Field()
i = TestItem()
i['keys'] = 3
self.assertEqual(i.keys(), ['keys'])
self.assertEqual(i.values(), [3])
def test_to_dict(self):
class TestItem(Item):
name = Field()
i = TestItem()
i['name'] = u'John'
self.assertEqual(dict(i), {'name': u'John'})
def test_copy(self):
class TestItem(Item):
name = Field()
item = TestItem({'name':'lower'})
copied_item = item.copy()
self.assertNotEqual(id(item), id(copied_item))
copied_item['name'] = copied_item['name'].upper()
self.assertNotEqual(item['name'], copied_item['name'])
if __name__ == "__main__":
unittest.main()
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