Examples of org.ethereum.vm.DataWord

org.ethereum.vm.DataWord
DataWord is the 32-byte array representation of a 256-bit number Calculations can be done on this word with other DataWords www.ethereumJ.com @author : Roman Mandeleil Created on: 01/06/2014 10:45

    assertEquals(expected, x.toString());
  }


  @Test
  public void testSignExtend2() {
    DataWord x = new DataWord(Hex.decode("f2"));
    byte k = 1;
    String expected = "00000000000000000000000000000000000000000000000000000000000000f2";


    x.signExtend(k);
    System.out.println(x.toString());
    assertEquals(expected, x.toString());
  }

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  @Test
  public void testSignExtend3() {


    byte k = 1;
    DataWord x = new DataWord(Hex.decode("0f00ab"));
    String expected = "00000000000000000000000000000000000000000000000000000000000000ab";


    x.signExtend(k);
    System.out.println(x.toString());
    assertEquals(expected, x.toString());
  }

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  @Test
  public void testSignExtend4() {


    byte k = 1;
    DataWord x = new DataWord(Hex.decode("ffff"));
    String expected = "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff";


    x.signExtend(k);
    System.out.println(x.toString());
    assertEquals(expected, x.toString());
  }

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  @Test
  public void testSignExtend5() {


    byte k = 3;
    DataWord x = new DataWord(Hex.decode("ffffffff"));
    String expected = "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff";


    x.signExtend(k);
    System.out.println(x.toString());
    assertEquals(expected, x.toString());
  }

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  @Test
  public void testSignExtend6() {


    byte k = 3;
    DataWord x = new DataWord(Hex.decode("ab02345678"));
    String expected = "0000000000000000000000000000000000000000000000000000000002345678";


    x.signExtend(k);
    System.out.println(x.toString());
    assertEquals(expected, x.toString());
  }

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  @Test
  public void testSignExtend7() {


    byte k = 3;
    DataWord x = new DataWord(Hex.decode("ab82345678"));
    String expected = "ffffffffffffffffffffffffffffffffffffffffffffffffffffffff82345678";


    x.signExtend(k);
    System.out.println(x.toString());
    assertEquals(expected, x.toString());
  }

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  @Test
  public void testSignExtend8() {


    byte k = 30;
    DataWord x = new DataWord(Hex.decode("ff34567882345678823456788234567882345678823456788234567882345678"));
    String expected = "0034567882345678823456788234567882345678823456788234567882345678";


    x.signExtend(k);
    System.out.println(x.toString());
    assertEquals(expected, x.toString());
  }

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  @Test(expected=IndexOutOfBoundsException.class)
  public void testSignExtendException1() {


    byte k = -1;
    DataWord x = new DataWord();


    x.signExtend(k); // should throw an exception
  }

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  @Test(expected=IndexOutOfBoundsException.class)
  public void testSignExtendException2() {


    byte k = 32;
    DataWord x = new DataWord();


    x.signExtend(k); // should throw an exception
  }

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        program = new Program(Hex.decode("36"), invoke);
        String s_expected_1 = "0000000000000000000000000000000000000000000000000000000000000040";


        vm.step(program);


        DataWord item1 = program.stackPop();
        assertEquals(s_expected_1, Hex.toHexString(item1.getData()).toUpperCase());
    }

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