1/*
2 * Copyright (C) 2017 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.dx.util;
18
19import static org.junit.Assert.assertEquals;
20
21import java.util.Arrays;
22import org.junit.Test;
23
24public final class ByteArrayAnnotatedOutputTest {
25    @Test
26    public void testArrayZeroedOut() {
27        int length = 100;
28        byte[] data = new byte[length];
29        Arrays.fill(data, (byte) 0xFF);
30
31        ByteArrayAnnotatedOutput output = new ByteArrayAnnotatedOutput(data);
32
33        output.writeZeroes(length);
34
35        for (int i = 0; i < length; i++) {
36            assertEquals("Position " + i + " has not been zeroed out", 0, data[i]);
37        }
38    }
39
40    @Test
41    public void testArrayAligned() {
42        int length = 16;
43        byte[] data = new byte[length];
44        Arrays.fill(data, (byte) 0xFF);
45
46        ByteArrayAnnotatedOutput output = new ByteArrayAnnotatedOutput(data);
47
48        // write at least one byte, so alignment is not correct
49        output.writeByte(0);
50        output.alignTo(length);
51
52        for (int i = 0; i < length; i++) {
53            assertEquals("Position " + i + " has not been zeroed out", 0, data[i]);
54        }
55    }
56}
57