@Test
public void requestMTUTest() {

    BluetoothGattCallback callback = connectAndGetCallback();
    callback.onConnectionStateChange(gatt, GATT_SUCCESS, STATE_CONNECTED);
    peripheral.requestMtu(32);
    verify(gatt).requestMtu(32);
    callback.onMtuChanged(gatt, 32, 0);
    verify(peripheralCallback).onMtuChanged(peripheral, 32, 0);
}