自动测试ApiController

时间:2016-11-04 13:24:44

标签: c# unit-testing testing asp.net-web-api

我有ApiController并希望使用包括路由在内的单元测试进行测试。

一个例子:

[RoutePrefix("prefix")]
public class Controller : ApiController
{
    [HttpGet]
    [Route("{id1}")]
    public int Add(int id1, [FromUri] int id2)
    {
        return id1 + id2;
    }
}

我现在想测试一下这个方法。我明白了,我可以像普通方法一样测试它。但我还想通过将URL转换为方法参数来测试它。

基本上我想进行一次自动测试,我调用像prefix/10?id2=5这样的网址,得到15的结果。这有可能吗?

4 个答案:

答案 0 :(得分:3)

我为内存中集成测试编写了一个小助手类,可以作为测试套件的一部分进行调用。

internal interface IHttpTestServer : IDisposable {
    HttpConfiguration Configuration { get; }
    HttpClient CreateClient();
}

internal class HttpTestServer : IHttpTestServer {
    HttpServer httpServer;

    public HttpTestServer(HttpConfiguration configuration = null) {
        httpServer = new HttpServer(configuration ?? new HttpConfiguration());
    }

    public HttpConfiguration Configuration {
        get { return httpServer.Configuration; }
    }

    public HttpClient CreateClient() {
        var client = new HttpClient(httpServer);
        return client;
    }

    public void Dispose() {
        if (httpServer != null) {
            httpServer.Dispose();
            httpServer = null;
        }
    }

    public static IHttpTestServer Create(HttpConfiguration configuration = null) {
        return new HttpTestServer(configuration);
    }
}

然后会像这样使用它

[TestMethod]
public async Task HttpClient_Should_Get_OKStatus_From_InMemory_Hosting() {

    using (var server = new HttpTestServer()) {

        MyWebAPiProjectNamespace.WebApiConfig.Configure(server.Configuration);

        var client = server.CreateClient();

        string url = "http://localhost/prefix/10?id2=5";
        var expected = 15;

        var request = new HttpRequestMessage {
            RequestUri = new Uri(url),
            Method = HttpMethod.Get
        };

        request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

        using (var response = await client.SendAsync(request)) {
            Assert.AreEqual(HttpStatusCode.OK, response.StatusCode);
            var result = await response.Content.ReadAsAsync<int>();
            Assert.AreEqual(expected, result);
        }
    }
}

这将配置一个内存测试服务器,测试可以使用其httpclient进行调用。它本质上是一个端到端的集成测试。

答案 1 :(得分:2)

  1. 使用Microsoft ASP.NET Web API 2.2 OWIN包创建OWIN StartUp类:

    public class Startup
    { 
        public void Configuration(IAppBuilder builder)
        {
            var config = new HttpConfiguration();
    
            builder.UseWebApi(config);
    
            config.MapHttpAttributeRoutes();
            config.EnsureInitialized();
        }
    }
    
  2. 在测试中使用Microsoft ASP.NET Web API 2.2 Self Host软件包(例如,使用NUnit):

    [Test]
    [TestCase(10, 5, 15)]
    [TestCase(1, 2, 3)]
    // add your test cases
    public async Task AdditionTests(int a, int b, int result) 
    {
        // Arrange
        var address = "http://localhost:5050";
    
        using (WebApp.Start<Startup>(address))
        {
            var client = new HttpClient();
    
            var requestUri = $"{address}/prefix/{a}?id2={b}";
    
            // Act
            var response = await client.GetAsync(requestUri);
    
            // Assert
            Assert.IsTrue(await response.Content.ReadAsAsync<int>() == result);
        }
    }
    

答案 2 :(得分:1)

可以通过使用邮递员或提琴手来测试url param ..

答案 3 :(得分:1)

这是一个集成测试,而不是单元测试。如果你想自动执行此操作,你必须拥有一个工具来启动/托管你的web api,然后对它执行请求。

如果你想将它作为单元测试保留,虽然你可以验证类和方法的属性并检查值。

var type = typeof(Controller);
var attributeRoutePrefix = type.GetCustomAttribute(typeof(RoutePrefixAttribute)) as RoutePrefixAttribute;
Assert.IsNotNull(attributeRoutePrefix);
Assert.AreEqual("prefix", attributeRoutePrefix.Prefix);

var methodAttribute = type.GetMethod(nameof(Controller.Add)).GetCustomAttribute(typeof(RouteAttribute)) as RouteAttribute;
Assert.IsNotNull(methodAttribute);
Assert.AreEqual("id1", methodAttribute.Template);