}
        };
    EscaperAsserts.assertBasic(wrappingEscaper);
    // escape everything.
    assertEquals("{[}{F}{O}{O}{]}", wrappingEscaper.escape("[FOO]"));
  }

  public void testDeleteUnsafeChars() throws IOException {
    CharEscaper deletingEscaper =
        new ArrayBasedCharEscaper(NO_REPLACEMENTS, ' ', '~') {
          private final char[] noChars = new char[0];

          @Override