def test_base64_string_converted_to_image(self, base64_image):
field = serializers.Base64ImageField()
output = field.to_internal_value(base64_image.decode('utf-8'))
assert_that(output, is_(instance_of(ContentFile)))
assert_that(output.name, matches_regexp(r'[a-z0-9-]{36}\.png'))
def test_data_uri_converted_to_image(self, base64_image):
field = serializers.Base64ImageField()
output = field.to_internal_value(b'data:image/png;base64,' +
base64_image) # noqa: WPS336
assert_that(output, is_(instance_of(ContentFile)))
assert_that(output.name, matches_regexp(r'[a-z0-9-]{36}\.png'))
def test_validation_fails_on_bad_string(self):
field = serializers.Base64ImageField()
try:
field.to_internal_value(b'bad_image')
except ValidationError as exception:
assert_that(exception.detail, has_length(1))
assert_that(str(exception.detail[0]),
is_(equal_to('Upload a valid base64-encoded image.')))
else:
raise AssertionError('ValidationError has not been raised')