public async Task IsEmailInUse_NotInUse_ReturnJsonTrue() { _mockUserManager.Setup(um => um.FindByEmailAsync(It.IsAny <string>())).Returns(Task.FromResult <ApplicationUser>(null)); CreateController(); var actionResult = await _registrationController.IsEmailInUse("test"); var viewResult = Assert.IsType <JsonResult>(actionResult); Assert.True((bool)viewResult.Value); }