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());&nbsp;&nbsp;或这个：string testValue = Convert.ToString(TestDriver);Assert.AreEqual(expected, testValue );&nbsp;&nbsp;