@BeforeClass
  public static void setUp() throws URISyntaxException, IOException {
    fakeLayerConfigurations =
        ImmutableList.of(
            makeLayerConfiguration("core/application/dependencies", "/app/libs/"),
            makeLayerConfiguration("core/application/resources", "/app/resources/"),
            makeLayerConfiguration("core/application/classes", "/app/classes/"));
  }
Helper class to hold a {@link ProgressEventHandler} and verify that it handles a full progress.
jib-core/src/integration-test/java/com/google/cloud/tools/jib/api/ContainerizerIntegrationTest.java