/*
 * $Id$
 *
 * Copyright (c) 2002, 2009, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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
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 */
package com.sun.demots.tests.bignum;

import java.io.PrintWriter;

import com.sun.javatest.Status;
import com.sun.javatest.Test;

import com.sun.demoapi.BigNum;

/**
 * A test for com.sun.demoapi.BigNum.compare.
 *
 * @test
 * @sources CompareTest.java
 * @executeClass com.sun.demots.tests.bignum.CompareTest
 */
public class CompareTest implements Test
{
    /**
     * Standard command-line entry point.
     * @param args command line args (ignored)
     */
    public static void main(String[] args) {
        PrintWriter err = new PrintWriter(System.err, true);
        Test t = new CompareTest();
        Status s = t.run(args, null, err);
        s.exit();
    }

    /**
     * Main test method. The test consists of a series of test cases;
     * the test passes only if all the individual test cases pass.
     * @param args ignored
     * @param out  ignored
     * @param err  a stream to which to write details about test failures
     * @return a Status object indicating if the test passed or failed
     */
    public Status run(String[] args, PrintWriter out, PrintWriter err) {
        // save error stream to which to write error messages
        this.err = err;

        boolean ok = true;

        ok = ok & test("-12345678901234567890", "-12345678901234567891",  1);
        ok = ok & test("-12345678901234567890", "-12345678901234567890",  0);
        ok = ok & test("-12345678901234567890", "-12345678901234567889", -1);
        ok = ok & test("-12345678901234567890",           "-1234567890", -1);
        ok = ok & test("-12345678901234567890",                  "-123", -1);
        ok = ok & test("-12345678901234567890",                     "0", -1);
        ok = ok & test("-12345678901234567890",                   "123", -1);
        ok = ok & test("-12345678901234567890",            "1234567890", -1);
        ok = ok & test("-12345678901234567890",  "12345678901234567890", -1);

        ok = ok & test("-1234567890", "-12345678901234567890",  1);
        ok = ok & test("-1234567890",           "-1234567891",  1);
        ok = ok & test("-1234567890",           "-1234567890",  0);
        ok = ok & test("-1234567890",           "-1234567889", -1);
        ok = ok & test("-1234567890",                  "-123", -1);
        ok = ok & test("-1234567890",                     "0", -1);
        ok = ok & test("-1234567890",                   "123", -1);
        ok = ok & test("-1234567890",            "1234567890", -1);
        ok = ok & test("-1234567890",  "12345678901234567890", -1);

        ok = ok & test("-123", "-12345678901234567890",  1);
        ok = ok & test("-123",           "-1234567890",  1);
        ok = ok & test("-123",                  "-124",  1);
        ok = ok & test("-123",                  "-123",  0);
        ok = ok & test("-123",                  "-122", -1);
        ok = ok & test("-123",                     "0", -1);
        ok = ok & test("-123",                   "123", -1);
        ok = ok & test("-123",            "1234567890", -1);
        ok = ok & test("-123",  "12345678901234567890", -1);

        ok = ok & test("0", "-12345678901234567890",  1);
        ok = ok & test("0",           "-1234567890",  1);
        ok = ok & test("0",                  "-123",  1);
        ok = ok & test("0",                    "-1",  1);
        ok = ok & test("0",                     "0",  0);
        ok = ok & test("0",                     "1", -1);
        ok = ok & test("0",                   "123", -1);
        ok = ok & test("0",            "1234567890", -1);
        ok = ok & test("0",  "12345678901234567890", -1);

        ok = ok & test("123", "-12345678901234567890",  1);
        ok = ok & test("123",           "-1234567890",  1);
        ok = ok & test("123",                  "-123",  1);
        ok = ok & test("123",                     "0",  1);
        ok = ok & test("123",                   "122",  1);
        ok = ok & test("123",                   "123",  0);
        ok = ok & test("123",                   "124", -1);
        ok = ok & test("123",            "1234567890", -1);
        ok = ok & test("123",  "12345678901234567890", -1);

        ok = ok & test("1234567890", "-12345678901234567890",  1);
        ok = ok & test("1234567890",           "-1234567890",  1);
        ok = ok & test("1234567890",                  "-123",  1);
        ok = ok & test("1234567890",                     "0",  1);
        ok = ok & test("1234567890",                   "123",  1);
        ok = ok & test("1234567890",            "1234567889",  1);
        ok = ok & test("1234567890",            "1234567890",  0);
        ok = ok & test("1234567890",            "1234567891", -1);
        ok = ok & test("1234567890",  "12345678901234567890", -1);

        ok = ok & test("12345678901234567890", "-12345678901234567890",  1);
        ok = ok & test("12345678901234567890",           "-1234567890",  1);
        ok = ok & test("12345678901234567890",                  "-123",  1);
        ok = ok & test("12345678901234567890",                     "0",  1);
        ok = ok & test("12345678901234567890",                   "123",  1);
        ok = ok & test("12345678901234567890",            "1234567890",  1);
        ok = ok & test("12345678901234567890",  "12345678901234567889",  1);
        ok = ok & test("12345678901234567890",  "12345678901234567890",  0);
        ok = ok & test("12345678901234567890",  "12345678901234567891", -1);

        if (ok)
            return Status.passed("OK");
        else
            return Status.failed("one or more test cases failed");
    }

    boolean test(String s1, String s2, int expectedResult) {
        BigNum bn1 = new BigNum(s1);
        BigNum bn2 = new BigNum(s2);
        int actualResult = bn1.compare(bn2);
        if (actualResult == expectedResult)
            return true;
        else {
            err.println("s1: " + s1
                        + " s2: " + s2
                        + " expected result: " + expectedResult
                        + " actual result: " + actualResult);
            return false;
        }
    }

    /**
     * A stream to which to write info about test failures.
     */
    private PrintWriter err;
}


