如何在C#单元测试中将测试Cookie添加到请求中

如何添加测试COOKIE以请求,以便可以从单元测试中测试代码.考虑这样的代码：

public ActionResult Dashboard()
{
if (Request.COOKIEs["userCOOKIE"] == null)
{
return RedirectToAction("Index");
}
return View();
}


我模拟了所有内容,但是我不知道如何向COOKIE添加内容,因此这一行Request.COOKIEs [“ userCOOKIE”]不会返回null.现在它为null并返回此错误：

{“Object reference not set to an instance of an object.”}

这是我的单元测试方法之一：

[TestMethod]
[TestCategory("Unit")]
public void Login_ShouldValidateUserAndLoginSuccessfully()
{
using (var kernel = new NSubstituteMockingKernel())
{
// Setup the dependency incjection
kernel.Load(new EntityFrameworkTestingNSubstituteModule());
// Create test request data
var request = new LogInRequest { UserName = "test", Password = "test" };
var fakeRespOnseHandler= new FakeResponseHandler();
fakeResponseHandler.AddFakeResponse(new Uri("http://localhost/test"), new HttpResponseMessage(HttpStatusCode.OK));
ConfigurationManager.AppSettings["SearchApiBaseUrl"] = "http://test/internal";
var server = new HttpServer(new HttpConfiguration(), fakeResponseHandler);
var httpClient = new HttpClient(server);
var fakeCOOKIEManager = new FakeCOOKIEManager();
var authenticatiOnService= Substitute.For();
var newUser = Fake.GetNewUser(1);
var newUserClaim = Fake.GetNewUserClaim(1, newUser.Id, "http://test/identity/claims/loans");
authenticationService.GetUserByEmailPasswordAsync(request.UserName, request.Password).Returns(newUser);
authenticationService.GetUserClaimByEmailAndPasswordAsync(request.UserName, request.Password).Returns(newUserClaim);
var cOntroller= new HomeController(httpClient, fakeCOOKIEManager, null, authenticationService);
Fake.SetFakeAuthenticatedControllerContext(controller);
controller.HttpContext.Session["ReturnUrl"] = "/search";
var result = controller.Login(request);
Assert.IsNotNull(result);
}
}


这是Fake for Httpcontext中的一个类：

public static HttpContextBase InitialiseFakeHttpContext(string url = "")
{
var HttpCOntextSub= Substitute.For();
var RequestSub = Substitute.For();
var RespOnseSub= Substitute.For();
var serverUtilitySub = Substitute.For();
var itemsSub = Substitute.For();
HttpContextSub.Request.Returns(RequestSub);
HttpContextSub.Response.Returns(ResponseSub);
HttpContextSub.Server.Returns(serverUtilitySub);
var COOKIE = Substitute.For();
HttpContextSub.Response.Returns(COOKIE);
return HttpContextSub;
}


解决方法:

这是一个示例单元测试,其中在请求上设置了COOKIE.

使用NSubstitute框架模拟http上下文,然后设置请求COOKIE属性.将模拟的http上下文应用于控制器上下文以模拟请求.

[TestClass]
public class MyControllerTests {
[TestMethod]
public void Request_COOKIEs_Should_Not_Be_Null() {
//Arrange
var COOKIEs = new HttpCOOKIECollection();
COOKIEs.Add(new HttpCOOKIE("userCOOKIE"));
var mockHttpCOntext= Substitute.For();
mockHttpContext.Request.COOKIEs.Returns(COOKIEs);
var sut = new MyController();
sut.COntrollerContext= new ControllerContext {
COntroller= sut,
HttpCOntext= mockHttpContext
};
//Act
var result = sut.Dashboard() as ViewResult;
//Assert
Assert.IsNotNull(result);
}
public class MyController : Controller {
public ActionResult Dashboard() {
if (Request.COOKIEs["userCOOKIE"] == null) {
return RedirectToAction("Index");
}
return View();
}
}
}


更新：

这是使用手动创建的模拟HttpContext进行的测试的更新版本.

[TestClass]
public class MyControllerTests {
[TestMethod]
public void Request_COOKIEs_Should_Not_Be_Null() {
//Arrange
var COOKIEs = new HttpCOOKIECollection();
COOKIEs.Add(new HttpCOOKIE("userCOOKIE"));
var mockHttpCOntext= new MockHttpContext(COOKIEs);
var sut = new MyController();
sut.COntrollerContext= new ControllerContext {
COntroller= sut,
HttpCOntext= mockHttpContext
};
//Act
var result = sut.Dashboard() as ViewResult;
//Assert
Assert.IsNotNull(result);
}
public class MyController : Controller {
public ActionResult Dashboard() {
if (Request.COOKIEs["userCOOKIE"] == null) {
return RedirectToAction("Index");
}
return View();
}
}
private class MockHttpContext : HttpContextBase {
private readonly MockRequest request;
public MockHttpContext(HttpCOOKIECollection COOKIEs) {
this.request = new MockRequest(COOKIEs);
}
public override HttpRequestBase Request {
get {
return request;
}
}
public class MockRequest : HttpRequestBase {
private readonly HttpCOOKIECollection COOKIEs;
public MockRequest(HttpCOOKIECollection COOKIEs) {
this.COOKIEs = COOKIEs;
}
public override HttpCOOKIECollection COOKIEs {
get {
return COOKIEs;
}
}
}
}
}