开发学院软件开发C语言 WF单元测试系列4:测试Workflow 阅读

WF单元测试系列4:测试Workflow

 2010-10-01 08:19:36 来源:WEB开发网   
核心提示:前面几篇介绍了如何对Activity进行状态测试,行为测试,WF单元测试系列4:测试Workflow,及Mock Object Framework的使用,当然,为工作流添加三个属性和一个事件:Property public string FirstName { get; set; } public string Las

前面几篇介绍了如何对Activity进行状态测试,行为测试,及Mock Object Framework的使用。当然,仅仅测试Activity是不够的,我们最终还要对整个Workflow进行测试。这一篇就为大家讲一下如何对Workflow进行测试。

在上一篇的NewEmployeeWFLibrary工程里,添加一个名为StoreNewAcmeEmployee的顺序工作流。为工作流添加三个属性和一个事件:

Property
        public string FirstName { get; set; }
        public string LastName { get; set; }

        public AcmeEmployee NewEmployee { get; set; }

我们设定这个工作流的功能是根据给定的FirstName和LastName生成一个AcmeEmployee对象。下面我们开始写测试代码。在测试工程中添加一个测试类ProvisionNewEmployee_WorkflowShould,代码如下:

ProvisionNewEmployee_WorkflowShould
[TestClass]
    public class ProvisionNewEmployee_WorkflowShould
    {
        private AcmeEmployee _createAcmeEmployee;
        private ManualWorkflowSchedulerService _manualScheduler;
        private WorkflowRuntime _runtime;

        [TestInitialize]
        public void TestInitializer()
        {
            _manualScheduler = new ManualWorkflowSchedulerService();
            _runtime = new WorkflowRuntime();

            // Add the scheduler to the _runtime before it is started
            _runtime.AddService(_manualScheduler);

            // when the workflow completes, assign the output value to a test
            // class member so it can be evaluated.
            _runtime.WorkflowCompleted += ((o, e) =>
                                               {
                                                   if (o == null) throw new

ArgumentNullException("o");
                                                   _createAcmeEmployee =
                                                       (AcmeEmployee)

e.OutputParameters["NewEmployee"];
                                               });

            // this event will fire if an exception occurs in the runtime.
            _runtime.WorkflowTerminated += ((o, e) =>
            {
                // but throwing it again means the runtime will handle it
                // in ServicesExceptionNotHandled
                throw e.Exception;
            });

            // The WF runtime wants to manage exceptions here all by itself
            // so we throw the expection again to ensure it gets into the
            // test class itself
            _runtime.ServicesExceptionNotHandled += ((o, e) => { throw e.Exception;

});
        }

        [TestMethod]
        public void CreateAValidAcmeEmployee()
        {
            RunTheWorkflow(Mother.FIRST_NAME, Mother.LAST_NAME);
            AcmeEmployeeAssert.AreEqualExceptForId(_createAcmeEmployee,

Mother.CreateNewAcmeEmployee());
        }

        [TestMethod]
        [ExpectedException(typeof(ArgumentNullException))]
        public void ThrowExceptionOnNullFirstName()
        {
            RunTheWorkflow(null, Mother.LAST_NAME);
        }

        [TestMethod]
        [ExpectedException(typeof(ArgumentNullException))]
        public void ThrowExceptionOnNullLastName()
        {
            RunTheWorkflow(Mother.FIRST_NAME, null);
        }

        private void RunTheWorkflow(string firstName, string lastName)
        {
            // Setup the input parameters
            // The name of the argument here must match the
            // name of the property on the workflow class
            var args = new Dictionary<string, object>
                           {
                               {"FirstName", firstName},
                               {"LastName", lastName}
                           };

            WorkflowInstance targetWorkflow =

_runtime.CreateWorkflow(typeof(ProvisionNewEmployee), args);
            targetWorkflow.Start();

            _manualScheduler.RunWorkflow(targetWorkflow.InstanceId);
        }
    }

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