Testing Serverless Applications - Part 1

GetArmTemplateDirectoriesHttpTriggerWithServiceLocatorTests.cs

[Theory]
[InlineData(HttpStatusCode.OK)]
public async void Given_Instance_Run_ShouldReturn_Response(HttpStatusCode statusCode)
{
    var models = new[] { new ContentModel() }.ToList();

    var service = new Mock<IGitHubService>();
    service.Setup(p => p.GetArmTemplateDirectoriesAsync(It.IsAny<string>())).ReturnsAsync(models);

    // Create a mocked IServiceLocator instance.
    var locator = new Mock<IServiceLocator>();
    locator.Setup(p => p.GetInstance<IGitHubService>()).Returns(service.Object);

    // Inject the mocked IServiceLocator instance.
    GetArmTemplateDirectoriesHttpTriggerWithServiceLocator.ServiceLocator = locator.Object;

    var config = new HttpConfiguration() { Formatters = { new JsonMediaTypeFormatter() } };
    var context = new HttpRequestContext() { Configuration = config };
    var req = new HttpRequestMessage() { Properties = { { HttpPropertyKeys.RequestContextKey, context } } };
    var log = new Mock<ILogger>();

    // Run the test.
    var res = await GetArmTemplateDirectoriesHttpTriggerWithServiceLocator.Run(req, log.Object).ConfigureAwait(false);

    res.StatusCode.Should().Be(statusCode);
}