public void testExistByPowderName()
{
repository.deleteAll();
repository.save(new Powder("a"));
Assert.IsTrue(repository.existsByPowderName("a"));
Assert.IsFalse(repository.existsByPowderName("b"));
}
public bool contains(string powderName)
{
return(powderRepository.existsByPowderName(powderName));
}