c# - visual studio 2012单元测试CRUD操作

Question

我正在 Visual Studio 2012 中测试创建类

我的 Controller 类是:

  public ActionResult Create()
    {
        return View();
    }

    //
    // POST: /Member/Create

    [HttpPost]
    public ActionResult Create(Member member)
    {
        if (ModelState.IsValid)
        {
            db.Members.Add(member);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        return View(member);
    }

测试类是:

[TestClass]
public class MemberTest
{

    [TestMethod]
    public void Create(Member mem)
    {
        mem.MemID = 123;
        mem.MemName = "sruthy";


        /// dont know what is writing.

    }
}

示例数据上下文.cs

public class SampleDataContext:DbContext
{
    public DbSet<Member> Members { get; set; }
    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
    }
}

我卡在测试用例中了，请帮助我。

Answer 1

首先 - 为您的数据访问代码创建一个抽象(模拟 DbContext 不是很方便的事情):

public interface IMemberRepository
{
    void Add(Member member);
}

并让你的 Controller 依赖于它

public MemberController(IMemberRepository repository)
{
    this.repository = repository;
}

这将使模拟数据访问代码变得容易。接下来 - 编写验证 Controller 行为的测试(我在这里使用 NUnit 和 Moq):

private MemberController controller;
private Mock<IMemberRepository> repositoryMock;
private Member member;

[SetUp]
public void Setup()
{
    repositoryMock = new Mock<IMemberRepository>();
    controller = new MemberController(repositoryMock.Object);
    member = new Member { MemID = 123, MemName = "sruthy" };
}

[Test]
public void ShouldCreateMemberWhenItIsValid()
{
    var result = (RedirectToRouteResult)controller.Create(member);
    Assert.That(result.RouteValues["action"], Is.EqualTo("Index"));
    repositoryMock.Verify(r => r.Add(member));
}

[Test]
public void ShouldNotCreateMemberWhenItIsNotValid()
{
    controller.ModelState.AddModelError("MemName", "Something wrong");
    var result = (ViewResult)controller.Create(member);
    Assert.That(result.ViewName, Is.Empty);
}

并编写实现:

[HttpPost]
public ActionResult Create(Member member)
{
    if (ModelState.IsValid)
    {
        repository.Add(member);
        return RedirectToAction("Index");
    }

    return View(member);
}