@Test
public void testPutIn() {

    Liquid content = new Liquid(100, 350, new Color(0x004000));
    TankSimulation tank = new TankSimulation(1000,
            TankSelector.valuesWithoutMix()[0], content, pipe1, pipe2);
    tank.putIn(new Liquid(100,  310, new Color(0x800020)));
    assertEquals(new Liquid(200, 330, new Color(0x402010)), tank.getLiquid());
}