private void check(char[] one, char[] two) {
        if (one.length != two.length) {
            Assert.fail("length (" + one.length + " vs " + two.length + ")");
        }

        for (int i = 0; i < one.length; i++) {
            if (!(one[i] == two[i])) {
                Assert.fail(one[i] + " vs " + two[i] + " @ " + i);
            }
        }
    }