问使用Moq模拟连接到Azure App配置服务

EN

public static WebApplicationBuilder UseFeatureFlags(this WebApplicationBuilder hostBuilder)
    {
        var endpoint = hostBuilder.Configuration.GetValue<string>("Azure:AppConfig:Endpoint");
        var cacheExpirationInterval = hostBuilder.Configuration.GetValue<int>("FeatureManagement:CacheExpirationInterval");
        var label = hostBuilder.Configuration.GetValue<string>("FeatureManagement:Label");

        hostBuilder.Host
            .ConfigureAppConfiguration((builder, config) =>
                config.AddAzureAppConfiguration(options =>
                      options.Connect(new Uri(endpoint), new DefaultAzureCredential())
                             .UseFeatureFlags(featureFlagOptions =>
                             {
                                 featureFlagOptions.CacheExpirationInterval = TimeSpan.FromMinutes(cacheExpirationInterval);
                                 featureFlagOptions.Label = label;
                             })));

        return hostBuilder;
    }

options.Connect(new Uri(endpoint), new DefaultAzureCredential())

public class ApiWebApplicationFactory : WebApplicationFactory<Program>
{
    public HttpClient WithMocks(
        IMock<ISecretVault>? secretVaultMock = null,
        IMock<IFeatureManager>? featureManager = null)
    {
        var client = WithWebHostBuilder(builder =>
            builder.ConfigureServices(services =>
            {
                ReplaceWithMock(typeof(ISecretVault), secretVaultMock, services);
                ReplaceWithMock(typeof(IFeatureManager), featureManager, services);
            })).CreateClient();


        return client;
    }

    private static void ReplaceWithMock<T>(Type tgt, IMock<T>? mock, IServiceCollection services)
        where T : class
    {
        if (mock != null)
        {
            var serviceClientDescriptor = services.Single(d => d.ServiceType == tgt);
            services.Remove(serviceClientDescriptor);
            services.AddScoped(_ => mock.Object);
        }
    }
}