public async void AskPasswordRecoveryWithMailNotSent() { // Arrange var mockedUserManager = GetUserManager(); mockedUserManager.FindByEmailAsync(Arg.Any <string>()).ReturnsForAnyArgs(new User { Id = "Id", Email = "email" }); mockedUserManager.GeneratePasswordResetTokenAsync(Arg.Any <User>()).ReturnsForAnyArgs("token"); var mockedSendgridService = GetSendgridService(); mockedSendgridService.SendRecoveryEmail(Arg.Any <string>(), Arg.Any <string>(), Arg.Any <string>()).ReturnsForAnyArgs(false); IdentityService service = new IdentityService(mockedUserManager, GetSignInManager(), mockedSendgridService, GetAppSettings(), GetRefreshTokenService(), GetImageService()); // Act var result = await service.AskPasswordRecovery("email"); // Assert Assert.False(result.Succeeded); Assert.NotNull(result.Messages); }