assertAssignable(new TypeToken<List<T>>() {}, new TypeToken<List<? extends Readable>>() {});
    assertAssignable(new TypeToken<List<T>>() {}, new TypeToken<List<? extends Appendable>>() {});
  }

  public void testToGenericType() {
    assertEquals(TypeToken.of(String.class), TypeToken.toGenericType(String.class));
    assertEquals(new TypeToken<int[]>() {}, TypeToken.toGenericType(int[].class));