ArrayBasedEscaperMap fem = ArrayBasedEscaperMap.create(map);
    // Array length is highest character value + 1
    assertThat(fem.getReplacementArray()).hasLength('z' + 1);
  }

  public void testMapping() {
    Map<Character, String> map =
        ImmutableMap.of(
            '\0', "zero",
            'a', "first",
            'b', "second",
            'z', "last",
            '\uFFFF', "biggest");