/*

 * Copyright (c) 2006, 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.

 */

/*

 * @test

 * @bug 4136371 5017980 6576055

 * @summary Test Integer.decode method

 * @author madbot

 * @author Joseph D. Darcy

 */

/**

 * There are six methods in java.lang.Integer which transform strings

 * into an int or Integer value:

 *

 * public Integer(String s)

 * public static Integer decode(String nm)

 * public static int parseInteger(String s, int radix)

 * public static int parseInteger(String s)

 * public static Integer valueOf(String s, int radix)

 * public static Integer valueOf(String s)

 *

 * The other five methods are tested elsewhere.

 */

public class Decode {

    private static void check(String val, int expected) {

        int n = (Integer.decode(val)).intValue();

        if (n != expected)

            throw new RuntimeException("Integer.decode failed. String:" +

                                                val + " Result:" + n);

    }

    private static void checkFailure(String val, String message) {

        try {

            int n = (Integer.decode(val)).intValue();

            throw new RuntimeException(message);

        } catch (NumberFormatException e) { /* Okay */}

    }

    public static void main(String[] args) throws Exception {

        check(new String(""+Integer.MIN_VALUE), Integer.MIN_VALUE);

        check(new String(""+Integer.MAX_VALUE), Integer.MAX_VALUE);

        check("10",   10);

        check("0x10", 16);

        check("0X10", 16);

        check("010",  8);

        check("#10",  16);

        check("+10",   10);

        check("+0x10", 16);

        check("+0X10", 16);

        check("+010",  8);

        check("+#10",  16);

        check("-10",   -10);

        check("-0x10", -16);

        check("-0X10", -16);

        check("-010",  -8);

        check("-#10",  -16);

        check(Long.toString(Integer.MIN_VALUE), Integer.MIN_VALUE);

        check(Long.toString(Integer.MAX_VALUE), Integer.MAX_VALUE);

        checkFailure("0x-10",   "Integer.decode allows negative sign in wrong position.");

        checkFailure("0x+10",   "Integer.decode allows positive sign in wrong position.");

        checkFailure("+",       "Raw plus sign allowed.");

        checkFailure("-",       "Raw minus sign allowed.");

        checkFailure(Long.toString((long)Integer.MIN_VALUE - 1L), "Out of range");

        checkFailure(Long.toString((long)Integer.MAX_VALUE + 1L), "Out of range");

        checkFailure("", "Empty String");

        try {

            Integer.decode(null);

            throw new RuntimeException("Integer.decode(null) expected to throw NPE");

        } catch (NullPointerException npe) {/* Okay */}

    }

}