@Test // EXTCODECOPY OP
public void testEXTCODECOPY_1() {

    VM vm = new VM();
    program = 
            new Program(Hex.decode("60036007600073471FD3AD3E9EEADEEC4608B92D16CE6B500704CC3C123456"), invoke);
    String m_expected_1 = "6000600000000000000000000000000000000000000000000000000000000000";
    vm.step(program);
    vm.step(program);
    vm.step(program);
    vm.step(program);
    vm.step(program);
    
    assertEquals(m_expected_1, Hex.toHexString(program.memory.array()).toUpperCase());
}