01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.commons.betwixt.expression;
18:
19: import java.util.ArrayList;
20: import java.util.Collection;
21: import java.util.List;
22:
23: import junit.framework.TestCase;
24:
25: /**
26: * Tests for {@link CollectionUpdater}.
27: */
28: public class TestCollectionUpdater extends TestCase {
29:
30: private CollectionUpdater updater = CollectionUpdater.getInstance();
31: private Context context = new Context();
32:
33: protected void setUp() throws Exception {
34: super .setUp();
35: updater = CollectionUpdater.getInstance();
36: context = new Context();
37: }
38:
39: public void testUpdateNull() throws Exception {
40: context.setBean(null);
41: updater.update(context, null);
42: updater.update(context, "Whatever");
43: }
44:
45: public void testUpdateNotCollection() throws Exception {
46: context.setBean("Whatever");
47: updater.update(context, null);
48: updater.update(context, "Whatever");
49: }
50:
51: public void testUpdateCollection() throws Exception {
52: List list = new ArrayList();
53: context.setBean(list);
54: updater.update(context, null);
55: updater.update(context, "Whatever");
56: assertEquals("Updater updates the list with the value", 1, list
57: .size());
58: updater.update(context, "Thus");
59: assertEquals("Updater updates the list with the value", 2, list
60: .size());
61: assertEquals("Updater updates the list in order", "Whatever",
62: list.get(0));
63: assertEquals("Updater updates the list in order", "Thus", list
64: .get(1));
65: }
66: }
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