public void Parse_Exception()
        {
            // arrange
            var serializer = new UUIDSerializer();

            // assert
            Assert.Throws <GraphQLClientException>(() => serializer.Parse(string.Empty));
        }
        public void Parse_Different_Formats(string format)
        {
            // arrange
            var serializer = new UUIDSerializer();
            var guid       = Guid.NewGuid();

            // act
            Guid result = serializer.Parse(guid.ToString(format));

            // assert
            Assert.Equal(guid, result);
        }