1 /*
2 * Copyright (C) 2022 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 #define LOG_TAG "methodstatistics_tests"
18
19 #include <mediautils/MethodStatistics.h>
20
21 #include <atomic>
22 #include <gtest/gtest.h>
23 #include <utils/Log.h>
24
25 using namespace android::mediautils;
26 using CodeType = size_t;
27
28 constexpr CodeType HELLO_CODE = 10;
29 constexpr const char * HELLO_NAME = "hello";
30 constexpr float HELLO_EVENTS[] = { 1.f, 3.f }; // needs lossless average
31
32 constexpr CodeType WORLD_CODE = 21;
33 constexpr const char * WORLD_NAME = "world";
34
35 constexpr CodeType UNKNOWN_CODE = 12345;
36
TEST(methodstatistics_tests,method_names)37 TEST(methodstatistics_tests, method_names) {
38 const MethodStatistics<CodeType> methodStatistics{
39 {HELLO_CODE, HELLO_NAME},
40 {WORLD_CODE, WORLD_NAME},
41 };
42
43 ASSERT_EQ(std::string(HELLO_NAME), methodStatistics.getMethodForCode(HELLO_CODE));
44 ASSERT_EQ(std::string(WORLD_NAME), methodStatistics.getMethodForCode(WORLD_CODE));
45 // an unknown code returns itself as a number.
46 ASSERT_EQ(std::to_string(UNKNOWN_CODE), methodStatistics.getMethodForCode(UNKNOWN_CODE));
47 }
48
TEST(methodstatistics_tests,events)49 TEST(methodstatistics_tests, events) {
50 MethodStatistics<CodeType> methodStatistics{
51 {HELLO_CODE, HELLO_NAME},
52 {WORLD_CODE, WORLD_NAME},
53 };
54
55 size_t n = 0;
56 float sum = 0.f;
57 for (const auto event : HELLO_EVENTS) {
58 methodStatistics.event(HELLO_CODE, event);
59 sum += event;
60 ++n;
61 }
62
63 const auto helloStats = methodStatistics.getStatistics(HELLO_CODE);
64 ASSERT_EQ((signed)n, helloStats.getN());
65 ASSERT_EQ(sum / n, helloStats.getMean());
66 ASSERT_EQ(n, methodStatistics.getMethodCount(HELLO_CODE));
67
68 const auto unsetStats = methodStatistics.getStatistics(UNKNOWN_CODE);
69 ASSERT_EQ(0, unsetStats.getN());
70 ASSERT_EQ(0.f, unsetStats.getMean());
71 ASSERT_EQ(0U, methodStatistics.getMethodCount(UNKNOWN_CODE));
72 }
73