How can Http messages be sent through WebApplicationFactory?

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Http messages can be sent through WebApplicationFactory in the following ways:

1. Using HttpClient: WebApplicationFactory provides an HttpClient that can be used to send Http requests to the web application. The HttpClient is created with the base address of the web application.

Example:

public class SampleTest : IClassFixture<WebApplicationFactory<Startup>>
{
   private readonly WebApplicationFactory<Startup> _factory;

   public SampleTest(WebApplicationFactory<Startup> factory)
   {
       _factory = factory;
   }

   [Fact]
   public async Task Test()
   {
       // Create an HttpClient with the base address of the web application
       var client = _factory.CreateClient();

       // Send an Http request using the HttpClient
       var response = await client.GetAsync("/api/values");

       // Assert the Http response
       Assert.Equal(HttpStatusCode.OK, response.StatusCode);
       var content = await response.Content.ReadAsStringAsync();
       Assert.Contains("value1", content);
       Assert.Contains("value2", content);
   }
}

1. Using TestServer: WebApplicationFactory also provides a TestServer that can be used to send Http requests to the web application. The TestServer is created from the web application's IWebHostBuilder.

Example:

public class SampleTest : IClassFixture<WebApplicationFactory<Startup>>
{
   private readonly WebApplicationFactory<Startup> _factory;

   public SampleTest(WebApplicationFactory<Startup> factory)
   {
       _factory = factory;
   }

   [Fact]
   public async Task Test()
   {
       // Create a TestServer from the web application's IWebHostBuilder
       var server = _factory.WithWebHostBuilder(builder =>
       {
           builder.UseEnvironment("Test");
       }).CreateServer();

       // Create an HttpClient with the base address of the TestServer
       var client = server.CreateClient();

       // Send an Http request using the HttpClient
       var response = await client.GetAsync("/api/values");

       // Assert the Http response
       Assert.Equal(HttpStatusCode.OK, response.StatusCode);
       var content = await response.Content.ReadAsStringAsync();
       Assert.Contains("value1", content);
       Assert.Contains("value2", content);
   }
}