@Test
public void testReadStringsPlayed() throws Exception {

    /**
     *  stringsPlayer : 
     *  field of beat (on the base of 7 strings !)
     *    0000000
     *    eBGDAE     (the first 0 is the bit for the 7th string)
     * if 2 strings is played in the same time, each byte of each strings
     * are set to 1
     *    0001100 for example
     */
    instance.openFile(simpleFile);
    Mockito.verify(listener).readStringPlayed(0, 0, 0, 0xC);
    Mockito.verify(listener).readStringPlayed(0, 0, 1, 0x4);
    Mockito.verify(listener).readStringPlayed(0, 0, 2, 0x4);
    Mockito.verify(listener).readStringPlayed(0, 0, 3, 0x4);
    Mockito.verify(listener).readStringPlayed(0, 1, 0, 0x0); // silence
}