@Test
public void testUniqueAttachIds() throws Exception {

    projectSeeds.add(productSeed("product.id.1"));
    projectSeeds.add(productSeed("product.id.2"));
    projectSeeds.add(productSeed("product.id.3"));
    List<Product> userConfig = Arrays.asList(new Product("product.id.2"), new Product("product.id.3", "extra"));
    subject = new ProductConfig(userConfig, projectSeeds);
    assertEquals(true, subject.uniqueAttachIds());
}