如何在单元测试 c# 中模拟“Request.Cookies.AllKeys”

Question

我需要在单元测试中获取下面提到的 cookie 中的值。

string[] myCookies = Request.Cookies.AllKeys;

值应为ASP.NET_SessionId、__RequestVerificationToken。

是否可以为它创建一个模拟。

Answer 1

您可以创建一个封装所需信息的假 HttpContext

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;
            }
        }
    }

}

并像这样使用

//Arrange
var cookies = new HttpCookieCollection();
cookies.Add(new HttpCookie("ASP.NET_SessionId"));
cookies.Add(new HttpCookie("__RequestVerificationToken"));

var context = new MockHttpContext(cookies);
var Request = context.Request;//This is just for demonstrative purposes

string[] myCookies = Request.Cookies.AllKeys;

或者您可以使用模拟框架来做同样的事情。

此示例使用最小起订量

var cookies = new HttpCookieCollection();
cookies.Add(new HttpCookie("ASP.NET_SessionId"));
cookies.Add(new HttpCookie("__RequestVerificationToken"));

var mockHttpContext = new Mock<HttpContextBase>();
mockHttpContext.Setup(m => m.Request.Cookies).Returns(cookies);

这个例子使用了 NSubstitute

var cookies = new HttpCookieCollection();
cookies.Add(new HttpCookie("ASP.NET_SessionId"));
cookies.Add(new HttpCookie("__RequestVerificationToken"));

var mockHttpContext = Substitute.For<HttpContextBase>();
mockHttpContext.Request.Cookies.Returns(cookies);