public async Task AddFollower_ReturnsOkResult() { // Arrange int id = 2; int idCity = 2; _regionService.Setup(x => x.AddFollowerAsync(It.IsAny <int>(), It.IsAny <int>())); // Act var result = await _regionController.AddFollower(id, idCity); // Assert Assert.IsInstanceOf <OkResult>(result); }