@Test
public void test_is_installed_deliverable() throws IOException {

    ExtensionService extensionService = new ExtensionService(deliverableDir.getRoot().toPath());
    DeliverablePackage deliverablePackageA = new DeliverablePackage(extensionService.newDeliverable(deliverableDir.newFile( "my-extension.jar").toURI().toURL()),deliverableDir.getRoot().toPath(),extensionService.deliverableRegistry);
    assertThat(deliverablePackageA.isInstalled()).isTrue();
}