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  • 如何編寫綜合的單元測試方案(6)

    發表于:2012-06-27來源:伯樂在線作者:李瓊點擊數: 標簽:單元測試
    知道什么導致測試失敗很重要,因此我們在斷言里添加失敗的信息提示。 單元測試 和代碼重用 回看那27個測試用例,我們可以斷定設置FirstName為null或者空

      知道什么導致測試失敗很重要,因此我們在斷言里添加失敗的信息提示。

      單元測試和代碼重用

      回看那27個測試用例,我們可以斷定設置FirstName為null或者空串應該也需求同樣的測試。因此我們可以擴展成:

      [TestMethod]

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    public void Person_FirstName_Set_Empty()
     {
     Person_FirstName_Set_Invalid(String.Empty);
     }

      [TestMethod]

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    public void Person_FirstName_Set_Null()
     {
     Person_FirstName_Set_Invalid(null);
     }
     public void Person_FirstName_Set_Invalid(string firstName)
     {
     var person = new Person("Adam", "Smith");
     var eventAssert = new PropertyChangedEventAssert(person);
     var errorsChangedAssert = new ErrorsChangedEventAssert(person);
     var changeAssert = new ChangeAssert(person);
     Assert.IsFalse(person.IsChanged, "Test setup failed, IsChanged is not false");
     Assert.AreEqual("Adam", person.FirstName, "Test setup failed, FirstName is not Adam");
     Assert.AreEqual("Smith", person.LastName, "Test setup failed, LastName is not Smith");
     person.FirstName = firstName;
     Assert.AreEqual(firstName , person.FirstName, "FirstName setter failed");
     Assert.AreEqual("Smith", person.FullName, "FullName not updated with FirstName changed");
     Assert.IsTrue(person.IsChanged, "IsChanged flag was not set when FirstName changed");
     eventAssert.Expect("IsChanged");
     eventAssert.Expect("FirstName");
     eventAssert.Expect("FullName");
     Assert.IsTrue(person.HasErrors, "HasErrors should have remained false");
     errorsChangedAssert.ExpectCountEquals(1, "Expected an ErrorsChanged event");
     changeAssert.AssertOnlyChangesAre("FirstName", "FullName", "IsChanged", "HasErrors");
     }

    原文轉自:http://www.kjueaiud.com

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