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 * $Id$
 *
 * 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.
 *
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package com.sun.demots.tests.lists.SortedList;

import java.io.PrintWriter;

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

import com.sun.demoapi.lists.SortedList;

/**
 * A test for com.sun.demoapi.lists.SortedList.insert.
 *
 * @test
 * @sources InsertTest.java
 * @executeClass com.sun.demots.tests.lists.SortedList.InsertTest
 */
public class InsertTest 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 InsertTest();
	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;

	SortedList.Comparator intComp = new SortedList.Comparator() {
		public int compare(Object a, Object b) {
		    int ia = ((Integer) a).intValue();
		    int ib = ((Integer) b).intValue();
		    return (ia < ib ? -1 : ia == ib ? 0 : 1);
		}
	    };

	Integer i0 = new Integer(0);
	Integer i10 = new Integer(10);
	Integer i100 = new Integer(100);
	Integer i1000 = new Integer(1000);
	Integer i10000 = new Integer(10000);

	boolean ok = true;

	ok = ok & test(new Object[] { i0, i10, i100, i1000, i10000 }, intComp);
	ok = ok & test(new Object[] { i10000, i1000, i100, i10, i0 }, intComp);
	ok = ok & test(new Object[] { i0, i10000, i10, i1000, i100 }, intComp);
	ok = ok & test(new Object[] { i0, i0, i0, i0, i0 }, intComp);
	ok = ok & test(new Object[] { i0, i0, i10000, i0, i0 }, intComp);
	ok = ok & test(new Object[] { i0, i0, i10000, i10000, i0 }, intComp);
	ok = ok & test(new Object[] { i0, i0, i10000, i10000, i0 }, intComp);
	ok = ok & test(new Object[] { i0, i10000, i10000, i10000, i10000 }, intComp);

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

    boolean test(Object[] data, SortedList.Comparator c) {
	return testAllowDups(data, c) && testNoDups(data, c);
    }

    boolean testAllowDups(Object[] data, SortedList.Comparator c) {
	err.println("test: " + toString(data, 0, data.length));
	SortedList list = new SortedList(c, false);
	Object[] expected = new Object[data.length];

	int n = 0;
	for (int i = 0; i < data.length; i++) {
	    list.insert(data[i]);
	    expected[n++] = data[i];
	    sort(expected, 0, n, c);
	    if (!verify(list, expected, 0, n, c)) {
		err.println("mismatch:");
		err.println("  expected: " + toString(expected, 0, n));
		err.println("     found: " + list);
		return false;
	    }
	}

	return true;
    }

    boolean testNoDups(Object[] data, SortedList.Comparator c) {
	SortedList list = new SortedList(c, true);
	Object[] expected = new Object[data.length];

	int n = 0;
	for (int i = 0; i < data.length; i++) {
	    list.insert(data[i]);
	insert: {
		for (int j = 0; j < n; j++) {
		    if (c.compare(data[i], expected[j]) == 0)
			break insert;
		}
		expected[n++] = data[i];
		sort(expected, 0, n, c);
	    }
	    if (!verify(list, expected, 0, n, c)) {
		err.println("mismatch:");
		err.println("  expected: " + toString(expected, 0, n));
		err.println("     found: " + list);
		return false;
	    }
	}

	return true;
    }

    void sort(Object[] data, int offset, int length, SortedList.Comparator c) {
	for (int i = offset; i < offset + length; i++) {
	    for (int j = i; j > offset && c.compare(data[j - 1], data[j]) > 0; j--) {
		Object o = data[j];
		data[j] = data[j-1];
		data[j - 1] = o;
	    }
	}
    }

    String toString(Object[] array, int offset, int length) {
	StringBuffer sb = new StringBuffer();
	for (int i = offset; i < (offset + length); i++) {
	    if (i > offset)
		sb.append(",");
	    sb.append(String.valueOf(array[i]));
	}
	return sb.toString();
    }
	

    boolean verify(SortedList l, Object[] expected, int offset, int length, SortedList.Comparator c) {
	int i = offset;
	for (SortedList.Entry e = l.getFirst(); e != null; e = e.getNext()) {
	    if (i < expected.length) {
		if (c.compare(e.getData(), expected[i]) != 0)
		    // data difference found
		    return false;
	    }
	    else 
		// list is longer than expected
		return false;

	    i++;
	}

	return (i == offset + length);
    }

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