Examples with BigInteger java.math.BigInteger used on opensource projects

Example 71 with BigInteger

use of java.math.BigInteger in project guava by google.

the class IntMathTest method testCheckedMultiply.

// presumably slow
@AndroidIncompatible
public void testCheckedMultiply() {
    for (int a : ALL_INTEGER_CANDIDATES) {
        for (int b : ALL_INTEGER_CANDIDATES) {
            BigInteger expectedResult = valueOf(a).multiply(valueOf(b));
            boolean expectedSuccess = fitsInInt(expectedResult);
            try {
                assertEquals(a * b, IntMath.checkedMultiply(a, b));
                assertTrue(expectedSuccess);
            } catch (ArithmeticException e) {
                assertFalse(expectedSuccess);
            }
        }
    }
}

Example 72 with BigInteger

use of java.math.BigInteger in project guava by google.

the class IntMathTest method testBinomial.

// Depends on the correctness of BigIntegerMath.binomial.
// BigIntegerMath // TODO(cpovirk): GWT-enable BigIntegerMath
@GwtIncompatible
public void testBinomial() {
    for (int n = 0; n <= 50; n++) {
        for (int k = 0; k <= n; k++) {
            BigInteger expectedBig = BigIntegerMath.binomial(n, k);
            int expectedInt = fitsInInt(expectedBig) ? expectedBig.intValue() : Integer.MAX_VALUE;
            assertEquals(expectedInt, IntMath.binomial(n, k));
        }
    }
}

Example 73 with BigInteger

use of java.math.BigInteger in project guava by google.

the class IntMathTest method testCheckedAdd.

// slow
@AndroidIncompatible
public void testCheckedAdd() {
    for (int a : ALL_INTEGER_CANDIDATES) {
        for (int b : ALL_INTEGER_CANDIDATES) {
            BigInteger expectedResult = valueOf(a).add(valueOf(b));
            boolean expectedSuccess = fitsInInt(expectedResult);
            try {
                assertEquals(a + b, IntMath.checkedAdd(a, b));
                assertTrue(expectedSuccess);
            } catch (ArithmeticException e) {
                assertFalse(expectedSuccess);
            }
        }
    }
}

Example 74 with BigInteger

use of java.math.BigInteger in project j2objc by google.

the class BigIntegerTest method test_Constructor$B.

/**
	 * @tests java.math.BigInteger#BigInteger(byte[])
	 */
public void test_Constructor$B() {
    byte[] myByteArray;
    myByteArray = new byte[] { (byte) 0x00, (byte) 0xFF, (byte) 0xFE };
    bi = new BigInteger(myByteArray);
    assertTrue("Incorrect value for pos number", bi.equals(BigInteger.ZERO.setBit(16).subtract(two)));
    myByteArray = new byte[] { (byte) 0xFF, (byte) 0xFE };
    bi = new BigInteger(myByteArray);
    assertTrue("Incorrect value for neg number", bi.equals(minusTwo));
}

Example 75 with BigInteger

use of java.math.BigInteger in project j2objc by google.

the class BigIntegerTest method test_andNotLjava_math_BigInteger.

/**
	 * @tests java.math.BigInteger#andNot(java.math.BigInteger)
	 */
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));
}