def test_invalid_item():
"""
When given an invalid value the ListOrItemField validate method should raise a ValidationError.
"""
field = ListOrItemField(child=CharField(max_length=5))
with pytest.raises(ValidationError):
field.to_internal_value('123456')
def test_validate_required_missing():
"""
When given a None value the ListOrItemField validate method should raise a ValidationError.
"""
field = ListOrItemField(child=DateField(format=ISO_8601))
with pytest.raises(ValidationError):
field.to_internal_value(None)
def test_to_internal_value_item():
"""
When given a valid item, the ListOrItemField to_internal_value method should utilize the item
from-native logic.
"""
field = ListOrItemField(child=DateField(format=ISO_8601))
data = field.to_internal_value(date.today().isoformat())
assert date.today() == data
def test_to_representation_item():
"""
When given a valid item, the ListOrItemField to_representation method should utilize the item to-native
logic.
"""
field = ListOrItemField(child=DateField(format=ISO_8601))
data = field.to_representation(date.today())
assert date.today().isoformat() == data
def test_to_internal_value_list():
"""
When given a valid list, the ListOrItemField to_internal_value method should utilize the list
from-native logic.
"""
field = ListOrItemField(child=DateField(format=ISO_8601))
data = field.to_internal_value([date.today().isoformat()])
assert [date.today()] == data
def test_to_representation_list():
"""
When given a valid list, the ListOrItemField to_representation method should utilize the list to-native
logic.
"""
field = ListOrItemField(child=DateField(format=ISO_8601))
data = field.to_representation([date.today()])
assert [date.today().isoformat()] == data
class ListOrItemKwArgsSerializer(serializers.Serializer):
authors = ListOrItemField(child=serializers.IntegerField(), required=False)
class ContainerSerializer(serializers.Serializer):
embedded = ListOrItemField(child=EmbeddedSerializer())
