我的单元测试有什么问题？C＃

Question

因此，基本上，我试图在程序中的一个类上运行单元测试，该类中的方法可以正常工作，但由于某种原因，我无法通过单元测试。这是我的课：public class Driver{    public DateTime Date { get; set; }    public String Start { get; set; }    public String End { get; set; }    public int Distance { get; set; }    public Driver(DateTime date, String start, String end, int distance)    {        this.Date = date;        this.Start = start;        this.End = end;        this.Distance = distance;    }         public override String ToString()    {        return string.Format("Date: {0}, Start Postcode: {1}, End Postcode: {2}, Distance: {3}miles", this.Date.ToString("dd/MM/yyyy"), this.Start, this.End, this.Distance);    }}}`这是我的测试课： [TestClass]public class Driverdetailstest{    private Driver TestDriver;    [TestMethod]    public void DriverDataTest()    {        DateTime date = new DateTime(2017, 12, 15);        string start = ("SR47BB");        string end = ("SR47FY");        int distance = 10;        var expected = string.Format("Date: {0}, Start Postcode: {1}, End Postcode: {2}, Distance: {3}miles", date.ToString("dd/MM/yyyy"), start, end, distance);        TestDriver = new Driver(date, start, end, distance);        Convert.ToString(TestDriver);        Assert.AreEqual(expected, TestDriver);            }}尽管字符串返回相同，但由于测试失败，我仍然收到此错误。Message: Assert.AreEqual failed. Expected:<Date: 15/12/2017, Start Postcode: SR47BB, End Postcode: SR47FY, Distance: 10miles (System.String)>. Actual:<Date: 15/12/2017, Start Postcode: SR47BB, End Postcode: SR47FY, Distance: 10miles (TaxiTracker.Driver)>.我做错了什么？

Answer 1

单元测试的问题在于您正在比较string和object。

您应该执行以下任一操作：

Assert.AreEqual(expected, TestDriver.ToString());  

或这个：

string testValue = Convert.ToString(TestDriver);

Assert.AreEqual(expected, testValue );