assertThat(ClassPath.getClassPathEntries(new URLClassLoader(new URL[0], null)).keySet())
        .isEmpty();
  }

  @AndroidIncompatible // Android forbids null parent ClassLoader
  public void testClassPathEntries_urlClassLoader_noParent() throws Exception {
    URL url1 = new URL("file:/a");
    URL url2 = new URL("file:/b");
    URLClassLoader classloader = new URLClassLoader(new URL[] {url1, url2}, null);