public class GwtTestSuite extends TestCase {
  public static Test suite() throws IOException {
    GWTTestSuite suite = new GWTTestSuite();
    for (ClassInfo info :
        ClassPath.from(GwtTestSuite.class.getClassLoader()).getTopLevelClasses()) {
      if (info.getName().endsWith("_gwt")) {
        Class<?> clazz = info.load();
        // TODO(cpovirk): why does asSubclass() throw? Is it something about ClassLoaders?
        @SuppressWarnings("unchecked")

   */
  public ImmutableSet<ClassInfo> getTopLevelClasses() {
    return FluentIterable.from(resources)
        .filter(ClassInfo.class)
        .filter(ClassInfo::isTopLevel)
        .toSet();
  }

  /** Returns all top level classes whose package name is {@code packageName}. */
  public ImmutableSet<ClassInfo> getTopLevelClasses(String packageName) {
    checkNotNull(packageName);

    List<Class<?>> classes = new ArrayList<>();
    String packageName = getClass().getPackage().getName();
    for (ClassPath.ClassInfo classInfo :
        ClassPath.from(getClass().getClassLoader()).getTopLevelClasses(packageName)) {
      Class<?> cls;
      try {
        cls = classInfo.load();
      } catch (NoClassDefFoundError e) {

    URL url = makeJarUrlWithName("To test unescaped spaces in jar file name.jar");
    URLClassLoader classloader = new URLClassLoader(new URL[] {url}, null);
    assertThat(ClassPath.from(classloader).getTopLevelClasses()).isNotEmpty();
  }

  @AndroidIncompatible // ClassPath is documented as not supporting Android

  public void testScan_classPathCycle() throws IOException {

    List<Class<?>> classes = new ArrayList<>();
    String packageName = getClass().getPackage().getName();
    for (ClassPath.ClassInfo classInfo :
        ClassPath.from(getClass().getClassLoader()).getTopLevelClasses(packageName)) {
      Class<?> cls;
      try {
        cls = classInfo.load();
      } catch (NoClassDefFoundError e) {

    URL url = makeJarUrlWithName("To test unescaped spaces in jar file name.jar");
    URLClassLoader classloader = new URLClassLoader(new URL[] {url}, null);
    assertThat(ClassPath.from(classloader).getTopLevelClasses()).isNotEmpty();
  }

  @AndroidIncompatible // ClassPath is documented as not supporting Android

  public void testScan_classPathCycle() throws IOException {