public void UseCloudFoundryHosting_ThrowsIfHostBuilderNull()
        {
            // Arrange
            IWebHostBuilder webHostBuilder = null;

            // Act and Assert
            var ex = Assert.Throws <ArgumentNullException>(() => ConfigServerHostBuilderExtensions.UseCloudFoundryHosting(webHostBuilder));

            Assert.Contains(nameof(webHostBuilder), ex.Message);
        }
 public static IWebHostBuilder WebHostBuilder(string[] args) =>
 ConfigServerHostBuilderExtensions.AddConfigServer(
     CloudFoundryHostBuilderExtensions.UseCloudFoundryHosting(
         WebHost.CreateDefaultBuilder(args).UseConfiguration(
             new ConfigurationBuilder().AddCommandLine(args).Build())))
 .UseStartup <Startup>();