[英]How to mock Url.Action
我尝试对单元测试返回的方法:
return Json(new { ok = true, newurl = Url.Action("Index") });
但是这一行抛出NullReferenceException
,这是由这部分返回引起的:
newurl = Url.Action("Index")
我试图做一些事情:
Request.SetupGet(x => x.Url).Returns(// Data here);
没有任何影响。
你能建议我任何解决方案吗?
这是使用NSubstitute模拟UrlHelper
方法。 与其他模拟库非常相似:
UrlHelper Url { get; set; }
[TestFixtureSetUp]
public void FixtureSetUp()
{
var routes = new RouteCollection();
RouteConfig.RegisterRoutes(routes);
var httpContext = Substitute.For<HttpContextBase>();
httpContext.Response.ApplyAppPathModifier(Arg.Any<string>())
.Returns(ctx => ctx.Arg<string>());
var requestContext = new RequestContext(httpContext, new RouteData());
Url = new UrlHelper(requestContext, routes);
}
// Pages
[Test]
public void HomePage()
{
Url.Action("home", "pages").ShouldEqual("/");
}
[Test]
public void PageDetails()
{
Url.Action("details", "pages", new { slug = "contact" }).ShouldEqual("/pages/contact");
}
如果要将模拟的UrlHelper附加到真实的Controller上,以便在Controller上调用Action时,它不会在UrlHelper上崩溃,这是我们所做的(快速而肮脏的版本):
public class MyController : Controller
{
[HttpPost]
public ActionResult DoSomething(int inputValue)
{
var userName = User.UserName();
return Json(new {
redirectUrl = Url.Action("RedirectAction", "RedirectController"),
isRedirect = true,
});
}
}
[Test]
public void Test1()
{
var sb = new StringBuilder();
var response = Substitute.For<HttpResponseBase>();
response.When(x => x.Write(Arg.Any<string>())).Do(ctx => sb.Append(ctx.Arg<string>()));
var httpContext = Substitute.For<HttpContextBase>();
httpContext.Response.Returns(response);
httpContext.User.Identity.Name.Returns("TestUser");
var controller = new MyController();
controller.ControllerContext = new ControllerContext(httpContext, new RouteData(), myController);
controller.Url = Substitute.For<UrlHelper>();
controller.Url.Action(Arg.Any<string>(), Arg.Any<string>()).Returns("anything");
controller.DoSomething(1);
}
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