public async void DeleteOneExperience_NotFound()
{
// arrange
mockRepo.Setup(x => x.GetFirstByExpressionAsync(It.IsAny <Expression <Func <Experience, bool> > >())).ReturnsAsync(() => null);
var id = Guid.NewGuid();
// act
var result = await controller.DeleteOneExperience(id);
// assert
var resultValue = Assert.IsAssignableFrom <NotFoundObjectResult>(result);
var returnedObj = Assert.IsType <ErrorObject>(resultValue.Value);
Assert.Equal("Could not find experience to delete", returnedObj.Error);
Assert.Equal("DELETE", returnedObj.Method);
Assert.Equal($"/api/experiences/{id}", returnedObj.At);
Assert.Equal(404, returnedObj.StatusCode);
}