/*
 * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package test.java.math.BigInteger;

/*
 * @test
 * @bug 6473768
 * @summary Tests of BigInteger.compareTo
 * @author Joseph D. Darcy
 */
import java.math.*;

import org.testng.Assert;
import org.testng.annotations.Test;

import static java.math.BigInteger.*;

// Android-changed: Replace error printing with asserts.
public class CompareToTests {

    @Test
    public void compareToTests() {
        final BigInteger MINUS_ONE = BigInteger.ONE.negate();
        final BigInteger TWO_POW_126 = ONE.shiftLeft(126);
        final BigInteger TWO_POW_127 = ONE.shiftLeft(127);
        final BigInteger TWO_POW_128 = ONE.shiftLeft(128);

        // First operand, second operand, expected compareTo result
        BigInteger [][] testCases = {
            // Basics
            {valueOf(0),        valueOf(0),     ZERO},
            {valueOf(0),        valueOf(1),     MINUS_ONE},
            {valueOf(1),        valueOf(2),     MINUS_ONE},
            {valueOf(2),        valueOf(1),     ONE},
            {valueOf(10),       valueOf(10),    ZERO},

            // Various relative lengths of internal mag array.
            {TWO_POW_127,                 TWO_POW_127,                 ZERO},
            {TWO_POW_127.negate(),        TWO_POW_127,                 MINUS_ONE},

            {TWO_POW_128.or(TWO_POW_126), TWO_POW_128,                 ONE},
            {TWO_POW_128.or(TWO_POW_126), TWO_POW_128.negate(),        ONE},

            {TWO_POW_128,                 TWO_POW_128.or(TWO_POW_126), MINUS_ONE},
            {TWO_POW_128.negate(),        TWO_POW_128.or(TWO_POW_126), MINUS_ONE},

            {TWO_POW_127,                 TWO_POW_128,                 MINUS_ONE},
            {TWO_POW_127.negate(),        TWO_POW_128,                 MINUS_ONE},

            {TWO_POW_128,                 TWO_POW_127,                 ONE},
            {TWO_POW_128.negate(),        TWO_POW_127,                 MINUS_ONE},

            // Long boundary and near boundary values
            {valueOf(Long.MAX_VALUE),            valueOf(Long.MAX_VALUE), ZERO},
            {valueOf(Long.MAX_VALUE).negate(),   valueOf(Long.MAX_VALUE), MINUS_ONE},

            {valueOf(Long.MAX_VALUE-1),          valueOf(Long.MAX_VALUE), MINUS_ONE},
            {valueOf(Long.MAX_VALUE-1).negate(), valueOf(Long.MAX_VALUE), MINUS_ONE},

            {valueOf(Long.MIN_VALUE),            valueOf(Long.MAX_VALUE), MINUS_ONE},
            {valueOf(Long.MIN_VALUE).negate(),   valueOf(Long.MAX_VALUE), ONE},

            {valueOf(Long.MIN_VALUE+1),          valueOf(Long.MAX_VALUE), MINUS_ONE},
            {valueOf(Long.MIN_VALUE+1).negate(), valueOf(Long.MAX_VALUE), ZERO},

            {valueOf(Long.MAX_VALUE),            valueOf(Long.MIN_VALUE), ONE},
            {valueOf(Long.MAX_VALUE).negate(),   valueOf(Long.MIN_VALUE), ONE},

            {valueOf(Long.MAX_VALUE-1),          valueOf(Long.MIN_VALUE), ONE},
            {valueOf(Long.MAX_VALUE-1).negate(), valueOf(Long.MIN_VALUE), ONE},

            {valueOf(Long.MIN_VALUE),            valueOf(Long.MIN_VALUE), ZERO},
            {valueOf(Long.MIN_VALUE).negate(),   valueOf(Long.MIN_VALUE), ONE},

            {valueOf(Long.MIN_VALUE+1),          valueOf(Long.MIN_VALUE), ONE},
            {valueOf(Long.MIN_VALUE+1).negate(), valueOf(Long.MIN_VALUE), ONE},
        };

        for (BigInteger[] testCase : testCases) {
            BigInteger a = testCase[0];
            BigInteger a_negate = a.negate();
            BigInteger b = testCase[1];
            BigInteger b_negate = b.negate();
            int expected = testCase[2].intValue();

            compareToTest(a,        b,         expected);
            compareToTest(a_negate, b_negate, -expected);
        }
    }

    private static void compareToTest(BigInteger a, BigInteger b, int expected) {
        int result = a.compareTo(b);
        int failed = (result==expected) ? 0 : 1;
        if (failed == 1) {
            Assert.fail("(" + a + ").compareTo(" + b + ") => " + result +
                               "\n\tExpected " + expected);
        }
    }

}