} catch (NullPointerException e) {
            // Expected
        }
    }

    public void test_encodeUrl_unicode() {
        assertEquals("%3F", DocumentUtil.encodeUrl("あ"));
        assertEquals("%3F%3F%3F", DocumentUtil.encodeUrl("あいう"));
    }

    public void test_complex_document_structure() {
        Map<String, Object> doc = new HashMap<>();

        .query("i:\u0001@/\\?#%j")
        .fragment("k:\u0001@/\\?#%l")
        .build()
    assertThat(url.toString())
      .isEqualTo(
        "http://a%3A%01%40%2F%5C%3F%23%25b:c%3A%01%40%2F%5C%3F%23%25d@ef:8080/" +
          "g:%01@%2F%5C%3F%23%25h?i:%01@/\\?%23%25j#k:%01@/\\?#%25l",
      )
    assertThat(url.scheme).isEqualTo("http")
    assertThat(url.username).isEqualTo("a:\u0001@/\\?#%b")