Method test_allow_null

tests/test_fields.py:1941–1955

If `allow_null=True` then '' on HTML forms is treated as None.

(self)

        assert output == ''

    def test_allow_null(self):
        """
        If `allow_null=True` then '' on HTML forms is treated as None.
        """
        field = serializers.ChoiceField(
            allow_null=True,
            choices=[
                1, 2, 3
            ]
        )
        field.field_name = 'example'
        value = field.get_value(QueryDict('example='))
        assert value is None
        output = field.run_validation(None)
        assert output is None

    def test_iter_options(self):
        """