# Creating and using Integration Testing for your API

# OPEN SOLUTION (BEFORE PAGING MODULE) IN THE TESTING MODULE FOR INTEGRATION TESTING

Creating and using Unit Testing for your API

# EXPLORER THE ChinookASPNETWebAPI.IntegrationTest PROJECT AND UNDERSTAND THE TESTS

This will give you a good insight into how to create implementation tests for different components of your Web API

# MODIFY THE PROGRAM FILE IN API PROJECT

If you get an error that testhost.deps.json is missing then add the following to your API project's Program.cs

public partial class Program { }

# ADD THE SET UP FOR THE IMPLEMENTATION TESTS IN ADDITIONAL TEST CLASSES

private readonly HttpClient _client;

public AlbumApiTest()
{
    var application = new WebApplicationFactory<Program>()
        .WithWebHostBuilder(builder =>
        {
            // ... Configure test services
        });

    _client = application.CreateClient();
}

# CREATE ADDITIONAL INTEGRATION TESTS

Using the existing integration tests for the Album as a guide, build more integration tests for some of the other models in the solution.

[Theory]
[InlineData("GET")]
public async void AlbumGetAllTest(string method)
{
    // Arrange
    var request = new HttpRequestMessage(new HttpMethod(method), "/api/v1.0/Album/");

    // Act
    var response = await _client.SendAsync(request);

    // Assert
    response.EnsureSuccessStatusCode();
    Assert.Equal(HttpStatusCode.OK, response.StatusCode);
}

[Theory]
[InlineData("GET", 1)]
public async Task AlbumGetTest(string method, int? id = null)
{
    // Arrange
    var request = new HttpRequestMessage(new HttpMethod(method), $"/api/Album/{id}");

    // Act
    var response = await _client.SendAsync(request);

    // Assert
    response.EnsureSuccessStatusCode();
    Assert.Equal(HttpStatusCode.OK, response.StatusCode);
}

Please understand you will only need one of the Asserts from the previous tests. I have given you two ways to test and find the results

# OPEN TEST EXPLORER AND BUILD TO SEE TESTS IN YOUR SOLUTION

Note -- You may need to rebuild your project for the Test Explorer to find the tests