public void WhenEmail_IsNotUniqueForBooking_ShouldReturnFalse() { _bookingRepoMock.Setup(x => x.GetBookingByMeetUpIdAsync(It.IsAny <int>())).ReturnsAsync( new List <Booking>() { new Booking() { Email = "*****@*****.**" } }); var bookingService = new BookingService(_bookingRepoMock.Object); var result = bookingService.CkeckEmailIsUniqueAsync("*****@*****.**", 1).Result; result.Should().Be(false); }