SimpleHttpFunctionTest.cs

// Copyright 2020, Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.TestHost;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System.Threading.Tasks;
using Xunit;

namespace Google.Cloud.Functions.Examples.IntegrationTests;

/// <summary>
/// Simple example of an integration test against a Cloud Function, without using
/// the Google.Cloud.Functions.Testing package.
/// </summary>
public class SimpleHttpFunctionTest
{
    [Fact]
    public async Task FunctionWritesHelloFunctionsFramework()
    {
        // Various other extension methods are available to configure logging,
        // startups, application configurers, along with reading configuration
        // from the command line and environment variables - but those aren't
        // required for this test.
        var builder = Host.CreateDefaultBuilder()
            .ConfigureWebHostDefaults(webHostBuilder => webHostBuilder
                .ConfigureServices(services => services.AddFunctionTarget<SimpleHttpFunction.Function>())
                .Configure((context, app) => app.UseFunctionsFramework(context))
                .UseTestServer());
        using var server = await builder.StartAsync();
        using var client = server.GetTestServer().CreateClient();
            
            // Make a request to the function, and test that the response looks how we expect it to.
        using var response = await client.GetAsync("request-uri");
        response.EnsureSuccessStatusCode();
        var content = await response.Content.ReadAsStringAsync();
        Assert.Equal("Hello, Functions Framework.", content);
    }
}