关于c＃：异常单元测试

unit test on exception

我正在编写单元测试，通过模型传递，特别是标题字段。

我的测试如下：

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通过控制器调用此类：

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public int Create(Movie movie)
{
int num;
if (MovieRepository.Movies == null)
{
throw new Exception("Movies datasource is not available");
}
lock (MovieRepository._dsMovies)
{
DataRow str = MovieRepository._dsMovies.Tables["Movie"].NewRow();
int num1 = MovieRepository._pk + 1;
MovieRepository._pk = num1;
int num2 = num1;
movie.MovieId = num2;
str["Id"] = num2;
if (string.IsNullOrEmpty(movie.Title))
{
throw new Exception("Movie Title is mandatory");
}
str["Title"] = movie.Title.Trim();
if (!string.IsNullOrEmpty(movie.Genre))
{
str["Genre"] = movie.Genre.Trim();
}
if (!string.IsNullOrEmpty(movie.Classification))
{
str["Classification"] = movie.Classification.ToString();
}
str["Rating"] = movie.Rating;
str["ReleaseDate"] = movie.ReleaseDate;
MovieRepository._dsMovies.Tables["Movie"].Rows.Add(str);
if ((movie.Cast == null ? 0 : (int)((int)movie.Cast.Length > 0)) != 0)
{
this.AddCast(movie);
}
MovieRepository._dsMovies.AcceptChanges();
num = num2;
}
return num;
}

正如您所看到的，它会检查标题

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if (string.IsNullOrEmpty(movie.Title))
{
throw new Exception("Movie Title is mandatory");
}

我可以断言那个例外吗？因为它在它失败后，我点击输出检查失败日志，我看到：

Test Name: CreateMovie

Test Outcome: Failed

Result Message: Test method Project.Test.UnitTest1.CreateMovie did
not throw an exception. An exception was expected by attribute
Microsoft.VisualStudio.TestTools.UnitTesting.ExpectedExceptionAttribute
defined on the test method.

Result StandardOutput:

System.Exception: Movie Title is mandatory

at Movies.MovieRepository.Create(Movie movie)

at Project.Web.Controllers.MoviesController.Create(Movie movie) in
c:\Users
ame\Documents\Visual Studio
2013\Projects\Project.Web\Project.Web\Controllers\MoviesController.cs:line
113

根据结果消息，它说它没有抛出异常，当我知道它确实/应该

相关讨论

你可以将你的单元测试包装在try catch中，并在catch中放入一个调试点，这样你就可以看到它发生了，并轻松调试它：

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[TestMethod]
[ExpectedException(typeof(Exception),"Movie Title is mandatory")]
public void Create()
{
var mc = new MoviesController();

var model = new Movie
{
Cast = new[] {"Scott","Joe","mark" },
Classification ="PG",
Genre = null,
MovieId = 0,
Rating = 5,
ReleaseDate = 2004,
Title = null
};

try
{
var rep = mc.Create(model);
Assert.Fail("This shouldn't be shown, because the above should have thrown an exception ! !");
}
catch (Exception e)
{
Console.Out.WriteLine("AH ha! caught it ! :) :" + e);
throw;
}
}

作为一个额外的奖励，你可以Assert.Fail所以如果它不抛出异常它将不会超过它。

作为一个额外的奖励，你不应该抛出Exception而是你自己的例外？也许MovieException，那么你可以特别抓住那个例外。