1 /*
2  * Copyright (C) 2018 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 
17 #include "gtest/gtest.h"
18 
19 #include "chre/util/buffer.h"
20 #include "chre/util/macros.h"
21 
22 using chre::Buffer;
23 
24 void fillBufferWithSequentialValues(float *buffer, size_t size) {
25   for (size_t i = 0; i < size; i++) {
26     buffer[i] = static_cast<float>(i);
27   }
28 }
29 
30 TEST(Buffer, EmptyByDefault) {
31   Buffer<float> buffer;
32   EXPECT_EQ(buffer.data(), nullptr);
33   EXPECT_EQ(buffer.size(), 0);
34 }
35 
36 TEST(Buffer, Wrap) {
37   float buf[128];
38   fillBufferWithSequentialValues(buf, ARRAY_SIZE(buf));
39 
40   Buffer<float> buffer;
41   buffer.wrap(buf, ARRAY_SIZE(buf));
42   EXPECT_EQ(buffer.data(), buf);
43   EXPECT_EQ(buffer.size(), ARRAY_SIZE(buf));
44 }
45 
46 TEST(Buffer, CopyArray) {
47   float buf[128];
48   fillBufferWithSequentialValues(buf, ARRAY_SIZE(buf));
49 
50   Buffer<float> buffer;
51   EXPECT_TRUE(buffer.copy_array(buf, ARRAY_SIZE(buf)));
52   EXPECT_EQ(buffer.size(), ARRAY_SIZE(buf));
53 
54   for (size_t i = 0; i < ARRAY_SIZE(buf); i++) {
55     EXPECT_EQ(buffer.data()[i], static_cast<float>(i));
56   }
57 }
58 
59 TEST(Buffer, CopyArrayEmpty) {
60   Buffer<float> buffer;
61   EXPECT_TRUE(buffer.copy_array(nullptr, 0));
62   EXPECT_EQ(buffer.data(), nullptr);
63   EXPECT_EQ(buffer.size(), 0);
64 }
65 
66 TEST(Buffer, CopyArrayEmptyAfterWrap) {
67   float buf[128];
68   fillBufferWithSequentialValues(buf, ARRAY_SIZE(buf));
69 
70   Buffer<float> buffer;
71   buffer.wrap(buf, ARRAY_SIZE(buf));
72   EXPECT_TRUE(buffer.copy_array(nullptr, 0));
73   EXPECT_EQ(buffer.data(), nullptr);
74   EXPECT_EQ(buffer.size(), 0);
75 }
76 
77 TEST(Buffer, CopyArrayEmptyAfterCopy) {
78   float buf[128];
79   fillBufferWithSequentialValues(buf, ARRAY_SIZE(buf));
80 
81   Buffer<float> buffer;
82   EXPECT_TRUE(buffer.copy_array(buf, ARRAY_SIZE(buf)));
83   EXPECT_TRUE(buffer.copy_array(nullptr, 0));
84   EXPECT_EQ(buffer.data(), nullptr);
85   EXPECT_EQ(buffer.size(), 0);
86 }
87