ApiControllerTestabilityTest.cs

// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System.Net;
using System.Net.Http;
using System.Web.Http.Routing;
using Microsoft.TestCommon;
using Moq;

namespace System.Web.Http.Controllers
{
    public class ApiControllerTestabilityTest
    {
        [Fact]
        public void Post_With_EmptyRequest_And_MockUrlHelper()
        {
            // Arrange
            CustomersController controller = new CustomersController();
            controller.Configuration = new HttpConfiguration();
            controller.Request = new HttpRequestMessage();

            Mock<UrlHelper> url = new Mock<UrlHelper>();
            url.Setup(u => u.Link("default", new { id = 42 })).Returns("http://location_header/").Verifiable();
            controller.Url = url.Object;

            // Act
            var result = controller.Post(new Customer { ID = 42 });

            // Assert
            Customer customer;
            Assert.Equal("http://location_header/", result.Headers.Location.AbsoluteUri);
            Assert.True(result.TryGetContentValue<Customer>(out customer));
            Assert.Equal(42, customer.ID);
        }

        [Fact]
        public void Post_With_EmptyConfiguration_ThrowsNoRoute()
        {
            // Arrange
            CustomersController controller = new CustomersController();
            controller.Configuration = new HttpConfiguration();
            controller.Request = new HttpRequestMessage();

            // Act
            Assert.ThrowsArgument(
                () => controller.Post(new Customer { ID = 42 }),
                "name",
                "A route named 'default' could not be found in the route collection.");
        }

        [Fact]
        public void Post_With_InitializeConfigurationAndRequestAndRouteData()
        {
            // Arrange
            CustomersController controller = new CustomersController();
            controller.Configuration = new HttpConfiguration();
            controller.Configuration.Routes.MapHttpRoute("default", "{controller}/{id}", new { id = RouteParameter.Optional });
            controller.RequestContext.RouteData = new HttpRouteData(new HttpRoute(), new HttpRouteValueDictionary { { "controller", "Customers" } });
            controller.Request = new HttpRequestMessage { RequestUri = new Uri("http://locahost/Customers") };

            // Act
            var result = controller.Post(new Customer { ID = 42 });

            // Assert
            Customer customer;
            Assert.Equal("http://locahost/Customers/42", result.Headers.Location.AbsoluteUri);
            Assert.True(result.TryGetContentValue<Customer>(out customer));
            Assert.Equal(42, customer.ID);
        }

        private class CustomersController : ApiController
        {
            public HttpResponseMessage Post(Customer c)
            {
                var response = Request.CreateResponse(HttpStatusCode.Created, c);
                response.Headers.Location = new Uri(Url.Link("default", new { id = c.ID }));
                return response;
            }
        }

        private class Customer
        {
            public int ID { get; set; }

            public string Name { get; set; }
        }
    }
}