如何在单元测试中模拟RestSharp可移植库 [英] How to mock RestSharp portable library in Unit Test
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问题描述
出于测试目的,我想模拟RestClient类
I would like to mockup the RestClient class for test purposes
public class DataServices : IDataServices
{
private readonly IRestClient _restClient;
public DataServices(IRestClient restClient)
{
_restClient = restClient;
}
public async Task<User> GetUserByUserName(string userName)
{
User user = null;
// create a new request
var restRequest = new RestRequest("User", Method.GET);
// create REST parameters
restRequest.AddParameter("userName", userName, ParameterType.QueryString);
// execute the REST request
var restResponse = await _restClient.Execute<User>(restRequest);
if (restResponse.StatusCode.Equals(HttpStatusCode.OK))
{
user = restResponse.Data;
}
return user;
}
}
我的测试课:
[TestClass]
public class DataServicesTest
{
public static IRestClient MockRestClient<T>(HttpStatusCode httpStatusCode, string json)
{
var mockIRestClient = new Mock<IRestClient>();
mockIRestClient.Setup(x => x.Execute<T>(It.IsAny<IRestRequest>()))
.Returns(new RestResponse<T>
{
Data = JsonConvert.DeserializeObject<T>(json),
StatusCode = httpStatusCode
});
return mockIRestClient.Object;
}
[TestMethod]
public async void GetUserByUserName()
{
var dataServices = new DataServices(MockRestClient<User>(HttpStatusCode.OK, "my json code"));
var user = await dataServices.GetUserByUserName("User1");
Assert.AreEqual("User1", user.Username);
}
}
但是我无法实例化RestResponse
对象,出现以下错误:
But I can't instantiate the RestResponse
object, I've the following error:
.Returns(new RestResponse<T>
{
Data = JsonConvert.DeserializeObject<T>(json),
StatusCode = httpStatusCode
});
无法在此处访问受保护的内部构造函数"RestResponse".
Cannot access protected internal constructor 'RestResponse' here.
我该如何解决?我正在Xamarin便携式库上使用FubarCoder.RestSharp nuget包.
How can I workaround this ? I'm using the FubarCoder.RestSharp nuget package on a Xamarin portable Library.
推荐答案
模拟IRestResponse<T>
并返回
public static IRestClient MockRestClient<T>(HttpStatusCode httpStatusCode, string json)
where T : new() {
var data = JsonConvert.DeserializeObject<T>(json)
var response = new Mock<IRestResponse<T>>();
response.Setup(_ => _.StatusCode).Returns(httpStatusCode);
response.Setup(_ => _.Data).Returns(data);
var mockIRestClient = new Mock<IRestClient>();
mockIRestClient
.Setup(x => x.Execute<T>(It.IsAny<IRestRequest>()))
.ReturnsAsync(response.Object);
return mockIRestClient.Object;
}
测试也应该更新为异步
[TestMethod]
public async Task GetUserByUserName() {
//Arrange
var client = MockRestClient<User>(HttpStatusCode.OK, "my json code");
var dataServices = new DataServices(client);
//Act
var user = await dataServices.GetUserByUserName("User1");
//Assert
Assert.AreEqual("User1", user.Username);
}
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