iframe.querySelectorAll("span");

    var t = -1;
    t++;
    tests[t] = async_test("ascii: 0E 24 42 79 56 1B 28 42");
    t++;
    tests[t] = async_test("roman: 1B 28 4A 0F 1B 28 42");
    t++;
    tests[t] = async_test("katakana: 1B 28 49 65 1B 28 42");

    t++;
    tests[t] = async_test(
        "lead byte and trail byte 1B: 1B 24 42 7F 56 1B 28 42"
    );
    t++;
    tests[t] = async_test("trail byte null index code point: 1B 24 42 24 74");
    //t++; tests[t] = async_test("trail byte end of stream: 