Testing Precompiled Azure Functions

httptrigger-with-dependency.cs

namespace PrecompiledLibraries
{
  public class MyHttpTriggerWithDependencies
  {
    // Define service locator as a publically accessible static field
    public static MyServiceLocator Locator = new MyServiceLocator();

    // Define function
    public static async Task<HttpResponseMessage> Run(HttpRequestMessage req, TraceWriter log)
    {
      string name = req.GetQueryNameValuePairs()
                       .FirstOrDefault(q => string.Compare(q.Key, "name", true) == 0)
                       .Value;

      var res = new HttpResponseMessage();
      if (name == null)
      {
        res.StatusCode = HttpStatusCode.BadRequest;
        res.Content = new ObjectContent<string>("Please pass a name on the query string or in the request body", new JsonMediaTypeFormatter());

        return res;
      }

      var value = Locator.Dependency.SomeValue; // Gets the instance from the service locator
      res.StatusCode = HttpStatusCode.OK;
      res.Content = new ObjectContent<string>($"Hello {name}, here's the dependency value of **{value}**", new JsonMediaTypeFormatter());

      return res;
    }
  }
}