public void VerifyUserName_ReturnFalse() { var mockUserManager = UserMockService.BaseUser(); var mapper = MapperService.DefaultMapper(); ApplicationUser friend = null; var mockRepo = new Mock <IFriendRepository>(); mockRepo.Setup(repo => repo.FindUserAsync(It.IsAny <string>())) .ReturnsAsync(friend); var controller = new FriendsController(mapper, mockUserManager.Object, mockRepo.Object); var result = controller.VerifyUserName(It.IsAny <string>()); var jsonResult = Assert.IsType <JsonResult>(result.Result); Assert.Equal(false, jsonResult.Value); }