public void ShouldThrowExceptionAndNotSaveGivenEmailAlreadyExists()
{
userRepositoryMock.Setup(repo => repo.IsUserIdExistsAsync(It.IsAny <Guid>()))
.ReturnsAsync(false);
userRepositoryMock.Setup(repo => repo.IsEmailExistsAsync(It.IsAny <string>()))
.ReturnsAsync(true);
var exception = Assert.ThrowsAsync <BusinessValidationException>
(async() => await userService.CreateAsync(mockUser));
Assert.That(exception.Message, Is.EqualTo("Email already exists"));
userRepositoryMock.Verify(repo => repo.CreateAsync(mockUser), Times.Never);
}
