assertNull(new TypeToken<Object>() {}.getGenericSuperclass());
    assertEquals(TypeToken.of(Object.class), new TypeToken<Object[]>() {}.getGenericSuperclass());
    assertNull(new TypeToken<List<String>>() {}.getGenericSuperclass());
    assertEquals(
        TypeToken.of(Object.class), new TypeToken<List<String>[]>() {}.getGenericSuperclass());
  }

  public void testGetGenericSuperclass_withSuperclass() {

    assertNull(new TypeToken<Object>() {}.getGenericSuperclass());
    assertEquals(TypeToken.of(Object.class), new TypeToken<Object[]>() {}.getGenericSuperclass());
    assertNull(new TypeToken<List<String>>() {}.getGenericSuperclass());
    assertEquals(
        TypeToken.of(Object.class), new TypeToken<List<String>[]>() {}.getGenericSuperclass());
  }

  public void testGetGenericSuperclass_withSuperclass() {

/**
 * Captures the actual type of {@code T}.
 *
 * @author Ben Yu
 */
abstract class TypeCapture<T> {

  /** Returns the captured type. */
  final Type capture() {
    Type superclass = getClass().getGenericSuperclass();
    checkArgument(superclass instanceof ParameterizedType, "%s isn't parameterized", superclass);
    return ((ParameterizedType) superclass).getActualTypeArguments()[0];
  }

            map.put(typeParameter, getActualClass(typeParameter.getBounds()[0], map));
        }

        final Class<?> superClass = clazz.getSuperclass();
        final Type superClassType = clazz.getGenericSuperclass();
        if (superClass != null) {
            gatherTypeVariables(superClass, superClassType, map);
        }

        final Class<?>[] interfaces = clazz.getInterfaces();

      // requireNonNull is safe because we're examining a type that's known to have a superclass.
      ParameterizedType parameterizedType =
          requireNonNull((ParameterizedType) subclass.getGenericSuperclass());
      for (ClassOwnership behavior : ClassOwnership.values()) {
        if (behavior.getOwnerType(LocalClass.class) == parameterizedType.getOwnerType()) {
          return behavior;
        }
      }

      introspector.visit(contextType);
      return ImmutableMap.copyOf(introspector.mappings);
    }

    @Override
    void visitClass(Class<?> clazz) {
      visit(clazz.getGenericSuperclass());
      visit(clazz.getGenericInterfaces());
    }

    @Override
    void visitParameterizedType(ParameterizedType parameterizedType) {
      Class<?> rawClass = (Class<?>) parameterizedType.getRawType();

      // requireNonNull is safe because we're examining a type that's known to have a superclass.
      ParameterizedType parameterizedType =
          requireNonNull((ParameterizedType) subclass.getGenericSuperclass());
      for (ClassOwnership behavior : ClassOwnership.values()) {
        if (behavior.getOwnerType(LocalClass.class) == parameterizedType.getOwnerType()) {
          return behavior;
        }
      }

      introspector.visit(contextType);
      return ImmutableMap.copyOf(introspector.mappings);
    }

    @Override
    void visitClass(Class<?> clazz) {
      visit(clazz.getGenericSuperclass());
      visit(clazz.getGenericInterfaces());
    }

    @Override
    void visitParameterizedType(ParameterizedType parameterizedType) {
      Class<?> rawClass = (Class<?>) parameterizedType.getRawType();