使用 Moq 模拟 ControllerBase 请求

Question

我在 .Net Core 2.2 中有一个 Web API，如下所示：

[Authorize]
[Route("api/[controller]")]
[ApiController]
public class SomeController : ControllerBase
{
    [HttpPost]
    public async Task<string> SomeMethodPost()
    {
        string returnUrl = $"{this.Request.Scheme}://{this.Request.Host}{this.Request.PathBase}/some/redirect";

        //Some Third Part Service Call

        return serviceResult;
    }
}

我想在我的单元测试中为我的控制器操作模拟属性 "Scheme"、"Host" 和 "PathBase"。我设法在我的单元测试方法中编写了以下代码：

var request = new Mock<HttpRequest>(MockBehavior.Strict);
request.Setup(x => x.Scheme).Returns("http");
request.Setup(x => x.Host).Returns(HostString.FromUriComponent("http://localhost:8080"));
request.Setup(x => x.PathBase).Returns(PathString.FromUriComponent("/api"));

var mockHttp = new Mock<ControllerBase>(MockBehavior.Strict);
mockHttp.SetupGet(x => x.Request).Returns(request.Object);

但是，最后一行中的模拟抛出异常，因为“ControllerBase”的“Request”是不可覆盖的。我理解抽象类的非虚拟属性的限制。有什么解决方法吗？

最小起订量版本为 4.13.0。

Answer 1

改变方法。不要模拟被测对象，在本例中是控制器。

控制器的Request通过HttpContext访问，可在安排测试时设置。

例如

//Arrange
var request = new Mock<HttpRequest>();
request.Setup(x => x.Scheme).Returns("http");
request.Setup(x => x.Host).Returns(HostString.FromUriComponent("http://localhost:8080"));
request.Setup(x => x.PathBase).Returns(PathString.FromUriComponent("/api"));

var httpContext = Mock.Of<HttpContext>(_ => 
    _.Request == request.Object
);

//Controller needs a controller context 
var controllerContext = new ControllerContext() {
    HttpContext = httpContext,
};
//assign context to controller
var controller = new SomeController(){
    ControllerContext = controllerContext,
};

String expected = "expected value here";

//Act
String actual = await controller.SomeMethodPost();


//Assert
Assert.AreEqual(expected, actual);

//...

使用 Moq 模拟 ControllerBase 请求

Mock ControllerBase Request using Moq

c#

unit-testing

moq

xunit.net

.net-core