public void RegisterT_RegistersMutator()
        {
            // arrange
            var factory     = new MutatorFactory();
            var mutatorInfo = new { Prop1 = "foo" };
            var asJson      = JsonConvert.SerializeObject(mutatorInfo);
            var jObj        = JsonConvert.DeserializeObject <JObject>(asJson);

            // act
            factory.Register <TestMutator>("test");

            // assert
            var mutator = factory.GetMutator("test", jObj);

            Assert.Equal("xx-foo", mutator("xx"));
        }
        public void GetMutator_Flyweight_ReusesMutator()
        {
            // arrange
            var factory = new MutatorFactory();

            factory.Register <TestMutator>("test");
            var mutatorInfo = new { Prop1 = "foo" };
            var asJson      = JsonConvert.SerializeObject(mutatorInfo);
            var jObj        = JsonConvert.DeserializeObject <JObject>(asJson);

            // act
            var mutator  = factory.GetMutator("test", jObj);
            var mutator2 = factory.GetMutator("test", jObj);

            // assert
            Assert.Equal(mutator2, mutator);
        }