public async void MergeDefaultInputs()
        {
            //Arrange
            Setup();
            var actionId     = Guid.NewGuid();
            var actionInputs = new MappingToken(null, null, null);

            actionInputs.Add(new StringToken(null, null, null, "input1"), new StringToken(null, null, null, "test1"));
            actionInputs.Add(new StringToken(null, null, null, "input2"), new StringToken(null, null, null, "test2"));
            var action = new Pipelines.ActionStep()
            {
                Name      = "action",
                Id        = actionId,
                Reference = new Pipelines.ContainerRegistryReference()
                {
                    Image = "ubuntu:16.04"
                },
                Inputs = actionInputs
            };

            _actionRunner.Action = action;

            Dictionary <string, string> finialInputs = new Dictionary <string, string>();

            _handlerFactory.Setup(x => x.Create(It.IsAny <IExecutionContext>(), It.IsAny <ActionStepDefinitionReference>(), It.IsAny <IStepHost>(), It.IsAny <ActionExecutionData>(), It.IsAny <Dictionary <string, string> >(), It.IsAny <Dictionary <string, string> >(), It.IsAny <Variables>(), It.IsAny <string>()))
            .Callback((IExecutionContext executionContext, Pipelines.ActionStepDefinitionReference actionReference, IStepHost stepHost, ActionExecutionData data, Dictionary <string, string> inputs, Dictionary <string, string> environment, Variables runtimeVariables, string taskDirectory) =>
            {
                finialInputs = inputs;
            })
            .Returns(new Mock <IHandler>().Object);

            //Act
            await _actionRunner.RunAsync();

            foreach (var input in finialInputs)
            {
                _hc.GetTrace().Info($"Input: {input.Key}={input.Value}");
            }

            //Assert
            Assert.Equal("test1", finialInputs["input1"]);
            Assert.Equal("test2", finialInputs["input2"]);
            Assert.Equal("github", finialInputs["input3"]);
        }