| // CHECKSTYLE_OFF: Copyrighted to ASF |
| /* |
| * Copyright 1999-2004 The Apache Software Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| // CHECKSTYLE_ON |
| package com.google.gwt.emultest.java.util; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.List; |
| |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| abstract class TestComparator extends TestObject { |
| |
| public abstract Comparator makeComparator(); |
| |
| public abstract List getComparableObjectsOrdered(); |
| |
| @Override |
| public Object makeObject() { |
| return makeComparator(); |
| } |
| |
| /** |
| * There were no Comparators in version 1.x. |
| * |
| * @return 2 |
| */ |
| @Override |
| public int getCompatibilityVersion() { |
| return 2; |
| } |
| |
| public void reverseObjects(List list) { |
| Collections.reverse(list); |
| } |
| |
| /** |
| * Sort object according to the given Comparator. |
| * |
| * @param list List to sort |
| * @param comparator sorting comparator |
| */ |
| public void sortObjects(List list, Comparator comparator) { |
| |
| Collections.sort(list, comparator); |
| } |
| |
| @Override |
| public boolean supportsEmptyCollections() { |
| return false; |
| } |
| |
| @Override |
| public boolean supportsFullCollections() { |
| return false; |
| } |
| |
| public void testEmptyListSort() { |
| List list = new ArrayList(); |
| sortObjects(list, makeComparator()); |
| |
| List list2 = new ArrayList(); |
| |
| assertTrue("Comparator cannot sort empty lists", list2.equals(list)); |
| } |
| |
| public void testReverseListSort() { |
| Comparator comparator = makeComparator(); |
| |
| List randomList = getComparableObjectsOrdered(); |
| reverseObjects(randomList); |
| sortObjects(randomList, comparator); |
| |
| List orderedList = getComparableObjectsOrdered(); |
| |
| assertTrue("Comparator did not reorder the List correctly", orderedList.equals(randomList)); |
| } |
| |
| public String getCanonicalComparatorName(Object object) { |
| StringBuilder retval = new StringBuilder(); |
| retval.append("data/test/"); |
| String colName = object.getClass().getName(); |
| colName = colName.substring(colName.lastIndexOf(".") + 1); |
| retval.append(colName); |
| retval.append(".version"); |
| retval.append(getCompatibilityVersion()); |
| retval.append(".obj"); |
| return retval.toString(); |
| } |
| |
| /** Compare the current serialized form of the Comparator against the canonical version in CVS. */ |
| public void testComparatorCompatibility() { |
| Comparator comparator = null; |
| |
| // make sure the canonical form produces the ordering we currently |
| // expect |
| List randomList = getComparableObjectsOrdered(); |
| reverseObjects(randomList); |
| sortObjects(randomList, comparator); |
| |
| List orderedList = getComparableObjectsOrdered(); |
| |
| assertTrue( |
| "Comparator did not reorder the List correctly:" + randomList, |
| orderedList.equals(randomList)); |
| } |
| } |