| /* |
| * Copyright (c) 2012, 2015, 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 8004504 |
| * @summary Ensure that ListBuffer is working properly |
| * @modules jdk.compiler/com.sun.tools.javac.util |
| */ |
| |
| import com.sun.tools.javac.util.List; |
| import com.sun.tools.javac.util.ListBuffer; |
| import java.util.Iterator; |
| import java.util.Objects; |
| |
| public class ListBufferTest { |
| public static void main(String... args) { |
| testRemove(); |
| testCopiedEndsWithList_nil(); |
| } |
| |
| private static void testCopiedEndsWithList_nil() { |
| ListBuffer<String> lb = new ListBuffer<>(); |
| |
| lb.add("a"); |
| lb.add("b"); |
| lb.add("c"); |
| |
| List<String> l1 = lb.toList(); |
| |
| assertListEquals(l1, "a", "b", "c"); |
| assertEndsWithNil(l1); |
| |
| lb.add("d"); |
| |
| List<String> l2 = lb.toList(); |
| assertListEquals(l2, "a", "b", "c", "d"); |
| assertEndsWithNil(l2); |
| assertListEquals(l1, "a", "b", "c"); |
| } |
| |
| private static void testRemove() { |
| ListBuffer<String> lb1 = new ListBuffer<>(); |
| |
| lb1.add("a"); |
| lb1.add("b"); |
| lb1.add("c"); |
| |
| assertListEquals(lb1.toList(), "a", "b", "c"); |
| assertEquals(lb1.next(), "a"); |
| assertListEquals(lb1.toList(), "b", "c"); |
| assertEquals(lb1.next(), "b"); |
| assertListEquals(lb1.toList(), "c"); |
| assertEquals(lb1.next(), "c"); |
| assertListEquals(lb1.toList()); |
| assertEquals(lb1.next(), null); |
| |
| lb1.add("d"); |
| |
| assertEquals(lb1.next(), "d"); |
| } |
| |
| private static void assertEndsWithNil(List<?> list) { |
| while (!list.isEmpty()) { |
| list = list.tail; |
| } |
| |
| if (list != List.nil()) throw new IllegalStateException("Not ending with List.nil()"); |
| } |
| |
| private static <T> void assertListEquals(Iterable<T> list, T... data) { |
| int i = 0; |
| Iterator<T> it = list.iterator(); |
| |
| while (it.hasNext() && i < data.length) { |
| assertEquals(it.next(), data[i++]); |
| } |
| |
| if (it.hasNext()) { |
| throw new IllegalStateException("Too many elements in the list"); |
| } |
| |
| if (i < data.length) { |
| throw new IllegalStateException("Too few elements in the list"); |
| } |
| } |
| |
| private static void assertEquals(Object expected, Object actual) { |
| if (!Objects.equals(expected, actual)) { |
| throw new IllegalStateException("Incorrect content. Expected: " + expected + ", actual: " + actual); |
| } |
| } |
| } |