assertEquals(0, item.getReadings()[0].length);
    }

    @Test
    public void test_mixedReadingsLengths() {
        String[] text = { "word1", "word2", "word3" };
        String[][] readings = { { "r1", "r2", "r3" }, // 3 readings
                { "r4" }, // 1 reading
                { "r5", "r6" } // 2 readings