/**
* Copyright 2011 Google Inc.
*
* 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.
*
*/
package org.waveprotocol.wave.model.document.operation.algorithm;
import junit.framework.TestCase;
import org.waveprotocol.wave.model.document.operation.DocOp;
import org.waveprotocol.wave.model.document.operation.impl.DocOpBuilder;
import org.waveprotocol.wave.model.operation.OpComparators;
/**
* Some basic tests for the doc-op collector.
*
* @author hearnden@google.com (David Hearnden)
*/
public class DocOpCollectorTest extends TestCase {
public void testSimpleMonotonicComposition() {
DocOpCollector collector = new DocOpCollector();
DocOp a = new DocOpBuilder().characters("a").build();
DocOp b = new DocOpBuilder().retain(1).characters("b").build();
DocOp c = new DocOpBuilder().retain(2).characters("c").build();
DocOp d = new DocOpBuilder().retain(3).characters("d").build();
collector.add(a);
collector.add(b);
collector.add(c);
collector.add(d);
DocOp expected = new DocOpBuilder().characters("abcd").build();
assertTrue(OpComparators.SYNTACTIC_IDENTITY.equal(expected, collector.composeAll()));
}
// There is no DocOp object that can represent a universal no-op, so null
// needs to be used instead. To work correctly, the collector needs to compose
// an empty collection to a universal no-op.
public void testEmptyCollectionComposesToNull() {
assertNull(new DocOpCollector().composeAll());
}
}