from django.http import QueryDict from rest_framework import serializers class TestNestedSerializer: def setup(self): class NestedSerializer(serializers.Serializer): one = serializers.IntegerField(max_value=10) two = serializers.IntegerField(max_value=10) class TestSerializer(serializers.Serializer): nested = NestedSerializer() self.Serializer = TestSerializer def test_nested_validate(self): input_data = { 'nested': { 'one': '1', 'two': '2', } } expected_data = { 'nested': { 'one': 1, 'two': 2, } } serializer = self.Serializer(data=input_data) assert serializer.is_valid() assert serializer.validated_data == expected_data def test_nested_serialize_empty(self): expected_data = { 'nested': { 'one': None, 'two': None } } serializer = self.Serializer() assert serializer.data == expected_data class TestNotRequiredNestedSerializer: def setup(self): class NestedSerializer(serializers.Serializer): one = serializers.IntegerField(max_value=10) class TestSerializer(serializers.Serializer): nested = NestedSerializer(required=False) self.Serializer = TestSerializer def test_json_validate(self): input_data = {} serializer = self.Serializer(data=input_data) assert serializer.is_valid() input_data = {'nested': {'one': '1'}} serializer = self.Serializer(data=input_data) assert serializer.is_valid() def test_multipart_validate(self): input_data = QueryDict('') serializer = self.Serializer(data=input_data) assert serializer.is_valid() input_data = QueryDict('nested[one]=1') serializer = self.Serializer(data=input_data) assert serializer.is_valid() class TestNestedSerializerWithMany: def setup(self): class NestedSerializer(serializers.Serializer): example = serializers.IntegerField(max_value=10) class TestSerializer(serializers.Serializer): allow_null = NestedSerializer(many=True, allow_null=True) not_allow_null = NestedSerializer(many=True) self.Serializer = TestSerializer def test_null_allowed_if_allow_null_is_set(self): input_data = { 'allow_null': None, 'not_allow_null': [{'example': '2'}, {'example': '3'}] } expected_data = { 'allow_null': None, 'not_allow_null': [{'example': 2}, {'example': 3}] } serializer = self.Serializer(data=input_data) assert serializer.is_valid(), serializer.errors assert serializer.validated_data == expected_data def test_null_is_not_allowed_if_allow_null_is_not_set(self): input_data = { 'allow_null': None, 'not_allow_null': None } serializer = self.Serializer(data=input_data) assert not serializer.is_valid() expected_errors = {'not_allow_null': [serializer.error_messages['null']]} assert serializer.errors == expected_errors def test_run_the_field_validation_even_if_the_field_is_null(self): class TestSerializer(self.Serializer): validation_was_run = False def validate_allow_null(self, value): TestSerializer.validation_was_run = True return value input_data = { 'allow_null': None, 'not_allow_null': [{'example': 2}] } serializer = TestSerializer(data=input_data) assert serializer.is_valid() assert serializer.validated_data == input_data assert TestSerializer.validation_was_run