@Test
  public void testTimestampsEpochPlus1s() throws IOException {
    layerEntriesDo(
        (layerName, layerEntry) -> {
          Instant modificationTime = layerEntry.getLastModifiedDate().toInstant();
          assertThat(modificationTime).isEqualTo(Instant.ofEpochSecond(1));
        });
  }
Verify that created image has explicit directory structures, default timestamps, permissions, and
file orderings.
jib-core/src/integration-test/java/com/google/cloud/tools/jib/api/ReproducibleImageTest.java