114 lines
3.4 KiB
Java
114 lines
3.4 KiB
Java
/*
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* Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8004504
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* @summary Ensure that ListBuffer is working properly
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* @modules jdk.compiler/com.sun.tools.javac.util
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*/
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import com.sun.tools.javac.util.List;
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import com.sun.tools.javac.util.ListBuffer;
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import java.util.Iterator;
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import java.util.Objects;
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public class ListBufferTest {
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public static void main(String... args) {
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testRemove();
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testCopiedEndsWithList_nil();
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}
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private static void testCopiedEndsWithList_nil() {
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ListBuffer<String> lb = new ListBuffer<>();
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lb.add("a");
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lb.add("b");
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lb.add("c");
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List<String> l1 = lb.toList();
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assertListEquals(l1, "a", "b", "c");
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assertEndsWithNil(l1);
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lb.add("d");
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List<String> l2 = lb.toList();
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assertListEquals(l2, "a", "b", "c", "d");
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assertEndsWithNil(l2);
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assertListEquals(l1, "a", "b", "c");
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}
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private static void testRemove() {
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ListBuffer<String> lb1 = new ListBuffer<>();
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lb1.add("a");
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lb1.add("b");
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lb1.add("c");
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assertListEquals(lb1.toList(), "a", "b", "c");
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assertEquals(lb1.next(), "a");
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assertListEquals(lb1.toList(), "b", "c");
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assertEquals(lb1.next(), "b");
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assertListEquals(lb1.toList(), "c");
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assertEquals(lb1.next(), "c");
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assertListEquals(lb1.toList());
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assertEquals(lb1.next(), null);
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lb1.add("d");
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assertEquals(lb1.next(), "d");
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}
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private static void assertEndsWithNil(List<?> list) {
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while (!list.isEmpty()) {
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list = list.tail;
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}
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if (list != List.nil()) throw new IllegalStateException("Not ending with List.nil()");
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}
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private static <T> void assertListEquals(Iterable<T> list, T... data) {
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int i = 0;
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Iterator<T> it = list.iterator();
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while (it.hasNext() && i < data.length) {
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assertEquals(it.next(), data[i++]);
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}
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if (it.hasNext()) {
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throw new IllegalStateException("Too many elements in the list");
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}
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if (i < data.length) {
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throw new IllegalStateException("Too few elements in the list");
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}
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}
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private static void assertEquals(Object expected, Object actual) {
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if (!Objects.equals(expected, actual)) {
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throw new IllegalStateException("Incorrect content. Expected: " + expected + ", actual: " + actual);
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}
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}
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}
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