@Test
public void testDuplicateExplicitAttachId() 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.1", "attach"), new Product("product.id.2"),
            new Product("product.id.3", "attach"));
    subject = new ProductConfig(userConfig, projectSeeds);
    assertEquals(false, subject.uniqueAttachIds());
}