在测试项目应用程序配置文件中找不到connectionString

Question

我有一个web项目的解决方案,我决定在解决方案中添加一个单元测试项目.在运行测试时,其中一个失败并出现此错误:

Result Message: 
Test method DetailsRoleController threw exception: 
System.InvalidOperationException: No connection string named 'EquipmentEntities' could be found in the application config file.

这是我的测试脚本:

  [TestClass]
public class RoleControllerTest
{
    RoleController RC = new RoleController();
    [TestMethod]
    public void IndexRoleController()
    {
    }
    [TestMethod]
    public void DetailsRoleController()
    {
        var result = RC.Delete(1);
        Assert.IsNotNull(result);
    }
}

和控制器方法:

public ActionResult Details(int? id)
    {
        if (id == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }
        Role role = db.Roles.Find(id);
        if (role == null)
        {
            return HttpNotFound();
        }
        return View(role);
    }

为什么这个测试失败了？

这个测试用例是不是使用主项目中的connectrionstrings/context运行的？

好的,我编辑了我的appconfig,现在看它:

<configuration>
  <appSettings>

  </appSettings>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
  <connectionStrings>
    <add name="EquipmentEntities" connectionString="metadata=res://*/Models.MagazynModel.csdl|res://*/Models.MagazynModel.ssdl|res://*/Models.MagazynModel.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=XYZ\sqlexpress;initial catalog=Equipment;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />
  </connectionStrings>
</configuration>

但现在我有另一个错误:

Result Message: Unable to create instance of class magazynTest.Controllers.RoleControllerTest. Error: System.TypeInitializationException:
 The type initializer for 'System.Data.Entity.Internal.AppConfig' threw an exception. ---> System.Configuration.ConfigurationErrorsException:
 Configuration system failed to initialize ---> System.Configuration.ConfigurationErrorsException: Unrecognized configuration section entityFramework. 

Answer 1

它不是默认情况下会从您的Web应用程序中提取它的情况.

它将在当前正在运行的项目中查找它.

您必须将其添加到包含连接设置的Unit Test项目中的app.config文件中.

另一种方法是将它注入到您的控制器中,这样在您的测试中,您可以传入一个模拟对象,这将防止必须处理实际的数据库实例.

如果您重新设计了使用存储库模式的方法,而不会看到类如下所示的类:

public class RoleController : Controller
   {
      private IRoleRepository roleRepository;

      // This constructor would not be needed if you were to use IOC container
      public RoleController ()
      {
         this.roleRepository = new RoleRepository(new RoleContext());
      }

      public RoleController(IRoleRepository studentRepository)
      {
         this.roleRepository = roleRepository;
      }
      ....

然后你可以像下面那样模拟出来的存储库:

[TestClass]
public class RoleControllerTest
{
    private Mock<IRoleRepository> _roleRepository;

    [SetUp]
    public void SetUp()
    {
    _roleRepository = new Mock<IRoleRepository>();

    }



    [TestMethod]
    public void IndexRoleController()
    {
    }
    [TestMethod]
    public void DetailsRoleController()
    {
        RoleController RC = new RoleController(_roleRepository.Object);
        var result = RC.Delete(1);
        Assert.IsNotNull(result);
    }
}

有关详情,请参阅此处:

http://kakimotonline.com/2011/02/13/tdd-in-asp-net-mvc-applications-with-moq-framework/

Answer 2

将ConnectionStrings部分从您的复制webConfig到测试项目appConfig