public async Task Fail_CostOwnerChanged_Empty_CostId()
{
//Arrange
Guid costId = Guid.Empty;
Guid userId = Guid.NewGuid();
Guid previousOwnerId = Guid.NewGuid();
//Act
bool result = await _emailNotificationService.CostOwnerHasChanged(costId, userId, previousOwnerId);
//Assert
result.Should().BeFalse();
_paperPusherClientMock.Verify(p => p.SendMessage(It.IsAny <EmailNotificationMessage <CostNotificationObject> >()), Times.Never);
}
