ASP.NET Core Integration tests code from my video: https://www.youtube.com/watch?v=7roqteWLw4s

IntegrationTest.cs

using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc.Testing;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Tweetbook.Contracts.V1;
using Tweetbook.Contracts.V1.Requests;
using Tweetbook.Contracts.V1.Responses;
using Tweetbook.Data;

namespace Tweetbook.IntegrationTests
{
    public class IntegrationTest
    {
        protected readonly HttpClient TestClient;
        
        protected IntegrationTest()
        {
            var appFactory = new WebApplicationFactory<Startup>()
                .WithWebHostBuilder(builder =>
                    {
                        builder.ConfigureServices(services =>
                        {
                            services.RemoveAll(typeof(DataContext));
                            services.AddDbContext<DataContext>(options => { options.UseInMemoryDatabase("TestDb"); });
                        });
                    });
            
            TestClient = appFactory.CreateClient();
        }

        protected async Task AuthenticateAsync()
        {
            TestClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", await GetJwtAsync());
        }

        protected async Task<PostResponse> CreatePostAsync(CreatePostRequest request)
        {
            var response = await TestClient.PostAsJsonAsync(ApiRoutes.Posts.Create, request);
            return await response.Content.ReadAsAsync<PostResponse>();
        }

        private async Task<string> GetJwtAsync()
        {
            var response = await TestClient.PostAsJsonAsync(ApiRoutes.Identity.Register, new UserRegistrationRequest
            {
                Email = "[email protected]",
                Password = "SomePass1234!"
            });

            var registrationResponse = await response.Content.ReadAsAsync<AuthSuccessResponse>();
            return registrationResponse.Token;
        }
    }
}

PostsControllerTests.cs

using System.Collections.Generic;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using FluentAssertions;
using Tweetbook.Contracts.V1;
using Tweetbook.Contracts.V1.Requests;
using Tweetbook.Domain;
using Xunit;

namespace Tweetbook.IntegrationTests
{
    public class PostsControllerTests : IntegrationTest
    {
        [Fact]
        public async Task GetAll_WithoutAnyPosts_ReturnsEmptyResponse()
        {
            // Arrange
            await AuthenticateAsync();

            // Act
            var response = await TestClient.GetAsync(ApiRoutes.Posts.GetAll);

            // Assert
            response.StatusCode.Should().Be(HttpStatusCode.OK);
            (await response.Content.ReadAsAsync<List<Post>>()).Should().BeEmpty();
        }

        [Fact]
        public async Task Get_ReturnsPost_WhenPostExistsInTheDatabase()
        {
            // Arrange
            await AuthenticateAsync();
            var createdPost = await CreatePostAsync(new CreatePostRequest {Name = "Test post"});

            // Act
            var response = await TestClient.GetAsync(ApiRoutes.Posts.Get.Replace("{postId}", createdPost.Id.ToString()));
            
            // Assert
            response.StatusCode.Should().Be(HttpStatusCode.OK);
            var returnedPost = await response.Content.ReadAsAsync<Post>();
            returnedPost.Id.Should().Be(createdPost.Id);
            returnedPost.Name.Should().Be("Test post");
        }
    }
}

Tweetbook.IntegrationTests.csproj

<Project Sdk="Microsoft.NET.Sdk">

    <PropertyGroup>
        <TargetFramework>netcoreapp2.2</TargetFramework>
        <IsPackable>false</IsPackable>
    </PropertyGroup>

    <ItemGroup>
        <PackageReference Include="FluentAssertions" Version="5.7.0" />
        <PackageReference Include="Microsoft.AspNetCore.App" Version="2.2.0" />
        <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="2.2.0" />
        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
        <PackageReference Include="xunit" Version="2.4.0" />
        <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
    </ItemGroup>

    <ItemGroup>
      <ProjectReference Include="..\Tweetbook\Tweetbook.csproj" />
    </ItemGroup>
</Project>

Hey 👋. The ApiRoutes is a class I created in the main project to manage the application’s uris in an elegant way. It’s manually created and it can be found in the project’s main repo under Contracts.

Where do we find the main project?

I am trying to integration test my .NET 5 project using similar setup to what has been described in the video. The unit test run fine when I run them individually but when I run them all at once first to be executed passes and rest fail, when I debugged it was because the user already existed. I think the context is being shared among the tests but I do not know how to not share it. Any help please?

Ok I figured it out. I had to give different database name for each run
the code is as below
var dbName = Guid.NewGuid().ToString(); var appFactory = new WebApplicationFactory<Startup>() .WithWebHostBuilder(builder => { builder.ConfigureServices(services => { var descriptor = services.SingleOrDefault(d => d.ServiceType == typeof(DbContextOptions<DataContext>)); if (descriptor != null) { services.Remove(descriptor); } services.AddDbContext<DataContext>(options => { options.UseInMemoryDatabase(dbName); }); }); }); TestClient = appFactory.CreateClient();

i got a null reference error on variable response in GetJwtAsync() method. I copied the same code. I use .net core 5.0 web api. Anyone know the fix?

`private async Task GetJwtAsync()
{
var response = await TestClient.PostAsJsonAsync(ApiRoutes.Identity.Register, new UserRegistrationRequest
{
Email = "[email protected]",
Password = "SomePass1234!"
});

            var registrationResponse = await response.Content.ReadAsAsync<AuthSuccessResponse>();
            return registrationResponse.Token;
        }`

Hey 👋. The ApiRoutes is a class I created in the main project to manage the application’s uris in an elegant way. It’s manually created and it can be found in the project’s main repo under Contracts.

Where do we find the main project?

I have found this repo where credits were also given to Nick: https://github.com/MohamedAshraf004/TweetbookAPI

Hey wave. The ApiRoutes is a class I created in the main project to manage the application’s uris in an elegant way. It’s manually created and it can be found in the project’s main repo under Contracts.

Where do we find the main project?

I have found this repo where credits were also given to Nick: https://github.com/MohamedAshraf004/TweetbookAPI

This repo is no longer available