1 /*
2 * Copyright 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 #undef LOG_TAG
18 #define LOG_TAG "SchedulerUnittests"
19
20 #include <gmock/gmock.h>
21 #include <gtest/gtest.h>
22
23 #include <array>
24
25 #include "Scheduler/SchedulerUtils.h"
26
27 namespace android {
28 namespace scheduler {
29
30 class SchedulerUtilsTest : public testing::Test {
31 public:
32 SchedulerUtilsTest() = default;
33 ~SchedulerUtilsTest() override = default;
34 };
35
36 namespace {
TEST_F(SchedulerUtilsTest,calculate_mean)37 TEST_F(SchedulerUtilsTest, calculate_mean) {
38 std::array<int64_t, 30> testArray{};
39 // Calling the function on empty array returns 0.
40 EXPECT_EQ(0, calculate_mean(testArray));
41
42 testArray[0] = 33;
43 EXPECT_EQ(1, calculate_mean(testArray));
44 testArray[1] = 33;
45 testArray[2] = 33;
46 EXPECT_EQ(3, calculate_mean(testArray));
47 testArray[3] = 42;
48 EXPECT_EQ(4, calculate_mean(testArray));
49 testArray[4] = 33;
50 EXPECT_EQ(5, calculate_mean(testArray));
51 testArray[5] = 42;
52 EXPECT_EQ(7, calculate_mean(testArray));
53 for (int i = 6; i < 30; i++) {
54 testArray[i] = 33;
55 }
56 EXPECT_EQ(33, calculate_mean(testArray));
57 }
58
TEST_F(SchedulerUtilsTest,calculate_median)59 TEST_F(SchedulerUtilsTest, calculate_median) {
60 std::vector<int64_t> testVector;
61 // Calling the function on empty vector returns 0.
62 EXPECT_EQ(0, calculate_median(&testVector));
63
64 testVector.push_back(33);
65 EXPECT_EQ(33, calculate_median(&testVector));
66 testVector.push_back(33);
67 testVector.push_back(33);
68 EXPECT_EQ(33, calculate_median(&testVector));
69 testVector.push_back(42);
70 EXPECT_EQ(33, calculate_median(&testVector));
71 testVector.push_back(33);
72 EXPECT_EQ(33, calculate_median(&testVector));
73 testVector.push_back(42);
74 EXPECT_EQ(33, calculate_median(&testVector));
75 testVector.push_back(42);
76 EXPECT_EQ(33, calculate_median(&testVector));
77 testVector.push_back(42);
78 EXPECT_EQ(42, calculate_median(&testVector));
79 testVector.push_back(60);
80 EXPECT_EQ(42, calculate_median(&testVector));
81 testVector.push_back(60);
82 EXPECT_EQ(42, calculate_median(&testVector));
83 testVector.push_back(33);
84 EXPECT_EQ(42, calculate_median(&testVector));
85 testVector.push_back(33);
86 EXPECT_EQ(42, calculate_median(&testVector));
87 testVector.push_back(33);
88 EXPECT_EQ(33, calculate_median(&testVector));
89 }
90
TEST_F(SchedulerUtilsTest,calculate_mode)91 TEST_F(SchedulerUtilsTest, calculate_mode) {
92 std::vector<int64_t> testVector;
93 // Calling the function on empty vector returns 0.
94 EXPECT_EQ(0, calculate_mode(testVector));
95
96 testVector.push_back(33);
97 EXPECT_EQ(33, calculate_mode(testVector));
98 testVector.push_back(33);
99 testVector.push_back(33);
100 EXPECT_EQ(33, calculate_mode(testVector));
101 testVector.push_back(42);
102 EXPECT_EQ(33, calculate_mode(testVector));
103 testVector.push_back(33);
104 EXPECT_EQ(33, calculate_mode(testVector));
105 testVector.push_back(42);
106 EXPECT_EQ(33, calculate_mode(testVector));
107 testVector.push_back(42);
108 EXPECT_EQ(33, calculate_mode(testVector));
109 testVector.push_back(42);
110 EXPECT_EQ(33, calculate_mode(testVector));
111 testVector.push_back(60);
112 EXPECT_EQ(33, calculate_mode(testVector));
113 testVector.push_back(60);
114 EXPECT_EQ(33, calculate_mode(testVector));
115 testVector.push_back(33);
116 // 5 occurences of 33.
117 EXPECT_EQ(33, calculate_mode(testVector));
118 testVector.push_back(42);
119 // 5 occurences of 33, 5 occurences of 42. We choose the first one.
120 EXPECT_EQ(33, calculate_mode(testVector));
121 testVector.push_back(42);
122 // 5 occurences of 33, 6 occurences of 42.
123 EXPECT_EQ(42, calculate_mode(testVector));
124 testVector.push_back(42);
125 // 5 occurences of 33, 7 occurences of 42.
126 EXPECT_EQ(42, calculate_mode(testVector));
127 }
128
129 } // namespace
130 } // namespace scheduler
131 } // namespace android