I've a function app. I wrote a unit test project(xunit) to test my function app code. In unit test method I'm calling Run method of my function app. When request is 'Get' my function app returns a simple json object. While this is working fine in my machine, in all my colleague's machines following line is throwing StackOverFlowException. When I checked the exception details, StackTrace is null.
request.CreateResponse(HttpStatusCode.OK, jObject)
In debug window I see the error as "An unhandled exception occurred in System.private.corlib.dll"
Function App:
public static async Task<HttpResponseMessage> Run(
[HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)]HttpRequestMessage req, ILogger log)
{
if (req.Method.Method.Equals(HttpMethod.Get.Method))
{
NameValueCollection queryString = System.Web.HttpUtility.ParseQueryString(req.RequestUri.Query);
operation = queryString.Get("operation");
if (operation == "GetVersion")
{
version = VersionHistory.GetVersion("ABC");// returns
// {"ABC" : "2.1"}
return req.CreateResponse(HttpStatusCode.OK, version);
//Above line causes StackOverFlowException
}
else
{
return 'Error message'
}
}
}
VersionHistory in above code is just a static class I'm using. It simply returns a json object something like {{"ABC": "0.1.2"}}. It has nothing to do with .net framework version.
public static JObject GetVersion(string key)
{
// some logic. This logic is hit only once. I'm sure this is not
// causing any exception
return JObject.Parse("{\"" + key + "\":\"0.1.2\"}");
}
unit test:
public async Task Run_WhenGetRequest_ShouldReturnAppropriateFunctionAppVersion()
{
const string QUERYSTRING_KEY = "operation";
const string QUERYSTRING_VALUE = "GetVersion";
const string FUNCTION_APP_NAME = "ABC";
const string FUNCTION_APP_VERSION = "2.1";
_request.Method = HttpMethod.Get;
NameValueCollection queryList = HttpUtility.ParseQueryString(_request.RequestUri.Query);
if (queryList.Get(QUERYSTRING_KEY) == null)
{
string queryString = QueryHelpers.AddQueryString(_request.RequestUri.ToString(), QUERYSTRING_KEY, QUERYSTRING_VALUE);
_request.RequestUri = new System.Uri(queryString);
}
HttpResponseMessage response = await FunctionAppClassName.Run(_request, _logger);
// Assert code
}
I've constructed request object in a Fixture class as following and mocked Logger instance.
Request = new HttpRequestMessage
{
Content = new StringContent("", Encoding.UTF8, "application/json"),
RequestUri = new Uri("http://localhost/")
};
var services = new ServiceCollection().AddMvc().AddWebApiConventions().Services.BuildServiceProvider();
Request.Properties.Add(nameof(HttpContext), new DefaultHttpContext { RequestServices = services });
Any idea how to fix this?
