1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package libcore.java.util.function;
18
19import junit.framework.TestCase;
20
21import java.util.function.Consumer;
22
23public class ConsumerTest extends TestCase {
24
25  public void testAndThen() throws Exception {
26    Consumer<StringBuilder> sweet = s -> s.append("sweet");
27    Consumer<StringBuilder> dude = s -> s.append("dude");
28
29    StringBuilder sb = new StringBuilder();
30    sweet.andThen(dude).accept(sb);
31    assertEquals("sweetdude", sb.toString());
32
33    sb.setLength(0);
34    dude.andThen(sweet).accept(sb);
35    assertEquals("dudesweet", sb.toString());
36  }
37
38  public void testAndThen_null() throws Exception {
39    Consumer<StringBuilder> one = s -> s.append("one");
40    try {
41      one.andThen(null);
42      fail();
43    } catch (NullPointerException expected) {}
44  }
45}
46