Java BigInteger.ZERO.andNot Examples

Example #1

File: BigIntegerTest.java Project: AuxXxilium/android_libcore

  /** @tests java.math.BigInteger#andNot(java.math.BigInteger) */
  @TestTargetNew(
      level = TestLevel.COMPLETE,
      notes = "",
      method = "andNot",
      args = {java.math.BigInteger.class})
  public void test_andNotLjava_math_BigInteger() {
    for (BigInteger[] element : booleanPairs) {
      BigInteger i1 = element[0], i2 = element[1];
      BigInteger res = i1.andNot(i2);
      int len = Math.max(i1.bitLength(), i2.bitLength()) + 66;
      for (int i = 0; i < len; i++) {
        assertTrue("andNot", (i1.testBit(i) && !i2.testBit(i)) == res.testBit(i));
      }
      // asymmetrical
      i1 = element[1];
      i2 = element[0];
      res = i1.andNot(i2);
      for (int i = 0; i < len; i++) {
        assertTrue("andNot reversed", (i1.testBit(i) && !i2.testBit(i)) == res.testBit(i));
      }
    }

    // regression for HARMONY-4653
    try {
      BigInteger.ZERO.andNot(null);
      fail("should throw NPE");
    } catch (Exception e) {
      // expected
    }
    BigInteger bi = new BigInteger(0, new byte[] {});
    assertEquals(BigInteger.ZERO, bi.andNot(BigInteger.ZERO));
  }