URLClassLoader child = new URLClassLoader(new URL[] {url}, parent) {};
    assertThat(ClassPath.getClassPathEntries(child)).containsExactly(new File("/a"), parent);
  }

  @AndroidIncompatible // Android forbids null parent ClassLoader
  public void testClassPathEntries_notURLClassLoader_noParent() {
    assertThat(ClassPath.getClassPathEntries(new ClassLoader(null) {})).isEmpty();
  }

    URLClassLoader child = new URLClassLoader(new URL[] {url}, parent) {};
    assertThat(ClassPath.getClassPathEntries(child)).containsExactly(new File("/a"), parent);
  }

  @AndroidIncompatible // Android forbids null parent ClassLoader
  public void testClassPathEntries_notURLClassLoader_noParent() {
    assertThat(ClassPath.getClassPathEntries(new ClassLoader(null) {})).isEmpty();
  }

  @VisibleForTesting
  static ImmutableMap<File, ClassLoader> getClassPathEntries(ClassLoader classloader) {
    LinkedHashMap<File, ClassLoader> entries = Maps.newLinkedHashMap();
    // Search parent first, since it's the order ClassLoader#loadClass() uses.
    ClassLoader parent = classloader.getParent();
    if (parent != null) {
      entries.putAll(getClassPathEntries(parent));
    }
    for (URL url : getClassLoaderUrls(classloader)) {