@Test // MSTORE OP
public void testMSTORE_2() {

    VM vm = new VM();
    program =  new Program(Hex.decode("611234600054615566602054"), invoke);
    String expected = "0000000000000000000000000000000000000000000000000000000000001234" +
                      "0000000000000000000000000000000000000000000000000000000000005566";
    vm.step(program);
    vm.step(program);
    vm.step(program);
    vm.step(program);
    vm.step(program);
    vm.step(program);
    assertEquals(expected, Hex.toHexString(program.memory.array()));
}