public async Task Assert_get_survey_by_guid()
{
IHttpActionResult actionResult = await surveyController.PutSurvey(survey);
var contentResult = actionResult as OkNegotiatedContentResult <Survey>;
Assert.IsNotNull(contentResult);
IHttpActionResult result = await surveyController.GetSurveyByGuid(survey.SurveyGuid);
Assert.IsInstanceOf(typeof(OkNegotiatedContentResult <Survey>), result);
}