def test_fields_append(self):
doc = Document(collection='test')
assert doc.fields == []
doc.name = Field(default=lambda: 'alpha')
doc.age = Field(default=lambda: 'bravo')
assert doc.fields == ['name', 'age']
assert doc.name == 'alpha'
assert doc.age == 'bravo'
def test_update(self):
original = Document(collection='test')
original.name = Field(value='named test')
original.age = Field(value=12)
cpy = original.copy()
cpy.clear()
cpy.update(name='bibou', age=30)
assert cpy.name == 'bibou'
assert original.name == 'named test'
assert original.age == 12
assert cpy.age == 30