/*

 * Copyright (c) 2018, 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.

 */

import java.util.List;

import java.util.stream.Collectors;

import java.util.stream.IntStream;

/**

 * @test

 * @summary Basic strip, stripLeading, stripTrailing functionality

 * @bug 8200377

 * @run main/othervm Strip

 */

public class Strip {

   public static void main(String... arg) {

        testStrip();

        testWhitespace();

    }

    /*

     * Test basic stripping routines

     */

    static void testStrip() {

        equal("   abc   ".strip(), "abc");

        equal("   abc   ".stripLeading(), "abc   ");

        equal("   abc   ".stripTrailing(), "   abc");

        equal("   abc\u2022   ".strip(), "abc\u2022");

        equal("   abc\u2022   ".stripLeading(), "abc\u2022   ");

        equal("   abc\u2022   ".stripTrailing(), "   abc\u2022");

        equal("".strip(), "");

        equal("".stripLeading(), "");

        equal("".stripTrailing(), "");

        equal("\b".strip(), "\b");

        equal("\b".stripLeading(), "\b");

        equal("\b".stripTrailing(), "\b");

    }

    /*

     * Test full whitespace range

     */

    static void testWhitespace() {

        StringBuilder sb = new StringBuilder(64);

        IntStream.range(1, 0xFFFF).filter(c -> Character.isWhitespace(c))

                .forEach(c -> sb.append((char)c));

        String whiteSpace = sb.toString();

        String testString = whiteSpace + "abc" + whiteSpace;

        equal(testString.strip(), "abc");

        equal(testString.stripLeading(), "abc"  + whiteSpace);

        equal(testString.stripTrailing(), whiteSpace + "abc");

    }

    /*

     * Report difference in result.

     */

    static void report(String message, String inputTag, String input,

                       String outputTag, String output) {

        System.err.println(message);

        System.err.println();

        System.err.println(inputTag);

        System.err.println(input.codePoints()

                .mapToObj(c -> (Integer)c)

                .collect(Collectors.toList()));

        System.err.println();

        System.err.println(outputTag);

        System.err.println(output.codePoints()

                .mapToObj(c -> (Integer)c)

                .collect(Collectors.toList()));

        throw new RuntimeException();

    }

    /*

     * Raise an exception if the two inputs are not equivalent.

     */

    static void equal(String input, String expected) {

        if (input == null || expected == null || !expected.equals(input)) {

            report("Failed equal", "Input:", input, "Expected:", expected);

        }

    }

}