1/*
2 * Copyright (C) 2012 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 com.android.volley.toolbox;
18
19import org.junit.After;
20import org.junit.Before;
21import org.junit.Test;
22import org.junit.runner.RunWith;
23
24import static org.junit.Assert.*;
25
26public class ByteArrayPoolTest {
27    @Test public void reusesBuffer() {
28        ByteArrayPool pool = new ByteArrayPool(32);
29
30        byte[] buf1 = pool.getBuf(16);
31        byte[] buf2 = pool.getBuf(16);
32
33        pool.returnBuf(buf1);
34        pool.returnBuf(buf2);
35
36        byte[] buf3 = pool.getBuf(16);
37        byte[] buf4 = pool.getBuf(16);
38        assertTrue(buf3 == buf1 || buf3 == buf2);
39        assertTrue(buf4 == buf1 || buf4 == buf2);
40        assertTrue(buf3 != buf4);
41    }
42
43    @Test public void obeysSizeLimit() {
44        ByteArrayPool pool = new ByteArrayPool(32);
45
46        byte[] buf1 = pool.getBuf(16);
47        byte[] buf2 = pool.getBuf(16);
48        byte[] buf3 = pool.getBuf(16);
49
50        pool.returnBuf(buf1);
51        pool.returnBuf(buf2);
52        pool.returnBuf(buf3);
53
54        byte[] buf4 = pool.getBuf(16);
55        byte[] buf5 = pool.getBuf(16);
56        byte[] buf6 = pool.getBuf(16);
57
58        assertTrue(buf4 == buf2 || buf4 == buf3);
59        assertTrue(buf5 == buf2 || buf5 == buf3);
60        assertTrue(buf4 != buf5);
61        assertTrue(buf6 != buf1 && buf6 != buf2 && buf6 != buf3);
62    }
63
64    @Test public void returnsBufferWithRightSize() {
65        ByteArrayPool pool = new ByteArrayPool(32);
66
67        byte[] buf1 = pool.getBuf(16);
68        pool.returnBuf(buf1);
69
70        byte[] buf2 = pool.getBuf(17);
71        assertNotSame(buf2, buf1);
72
73        byte[] buf3 = pool.getBuf(15);
74        assertSame(buf3, buf1);
75    }
76}
77