public async Task Test_CreateAsync_Concrete_Async() { // Cancellation token. CancellationToken cancellationToken = CancellationToken.None; // The client factory. var factory = new HttpClientFactory(); // Not null. Assert.NotNull(factory); // Create client. HttpClient client = await factory.CreateAsync(null, true, cancellationToken).ConfigureAwait(false); // Not null. Assert.NotNull(client); }