1 /*
2 * Copyright 2020 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 "Fps.h"
18
19 #include <gmock/gmock.h>
20 #include <gtest/gtest.h>
21
22 namespace android {
23
TEST(FpsTest,construct)24 TEST(FpsTest, construct) {
25 Fps fpsDefault;
26 EXPECT_FALSE(fpsDefault.isValid());
27
28 Fps fps1(60.0f);
29 EXPECT_TRUE(fps1.isValid());
30 Fps fps2 = Fps::fromPeriodNsecs(static_cast<nsecs_t>(1e9f / 60.0f));
31 EXPECT_TRUE(fps2.isValid());
32 EXPECT_TRUE(fps1.equalsWithMargin(fps2));
33 }
34
TEST(FpsTest,compare)35 TEST(FpsTest, compare) {
36 constexpr float kEpsilon = 1e-4f;
37 const Fps::EqualsInBuckets equalsInBuckets;
38 const Fps::EqualsWithMargin equalsWithMargin;
39
40 EXPECT_TRUE(Fps(60.0f).equalsWithMargin(Fps(60.f)));
41 EXPECT_TRUE(Fps(60.0f).equalsWithMargin(Fps(60.f - kEpsilon)));
42 EXPECT_TRUE(Fps(60.0f).equalsWithMargin(Fps(60.f + kEpsilon)));
43
44 EXPECT_TRUE(equalsInBuckets(Fps(60.0f), Fps(60.0f)));
45 EXPECT_TRUE(equalsInBuckets(Fps(60.0f), Fps(60.0f - kEpsilon)));
46 EXPECT_TRUE(equalsInBuckets(Fps(60.0f), Fps(60.0f + kEpsilon)));
47
48 EXPECT_TRUE(equalsWithMargin(Fps(60.0f), Fps(60.0f)));
49 EXPECT_TRUE(equalsWithMargin(Fps(60.0f), Fps(60.0f - kEpsilon)));
50 EXPECT_TRUE(equalsWithMargin(Fps(60.0f), Fps(60.0f + kEpsilon)));
51
52 EXPECT_TRUE(Fps(60.0f).lessThanOrEqualWithMargin(Fps(60.f + kEpsilon)));
53 EXPECT_TRUE(Fps(60.0f).lessThanOrEqualWithMargin(Fps(60.f)));
54 EXPECT_TRUE(Fps(60.0f).lessThanOrEqualWithMargin(Fps(60.f - kEpsilon)));
55
56 EXPECT_TRUE(Fps(60.0f).greaterThanOrEqualWithMargin(Fps(60.f + kEpsilon)));
57 EXPECT_TRUE(Fps(60.0f).greaterThanOrEqualWithMargin(Fps(60.f)));
58 EXPECT_TRUE(Fps(60.0f).greaterThanOrEqualWithMargin(Fps(60.f - kEpsilon)));
59
60 // Fps with difference of 1 should be different
61 EXPECT_FALSE(Fps(60.0f).equalsWithMargin(Fps(61.f)));
62 EXPECT_TRUE(Fps(60.0f).lessThanWithMargin(Fps(61.f)));
63 EXPECT_TRUE(Fps(60.0f).greaterThanWithMargin(Fps(59.f)));
64
65 // These are common refresh rates which should be different.
66 EXPECT_FALSE(Fps(60.0f).equalsWithMargin(Fps(59.94f)));
67 EXPECT_TRUE(Fps(60.0f).greaterThanWithMargin(Fps(59.94f)));
68 EXPECT_FALSE(equalsInBuckets(Fps(60.0f), Fps(59.94f)));
69 EXPECT_FALSE(equalsWithMargin(Fps(60.0f), Fps(59.94f)));
70 EXPECT_NE(std::hash<Fps>()(Fps(60.0f)), std::hash<Fps>()(Fps(59.94f)));
71
72 EXPECT_FALSE(Fps(30.0f).equalsWithMargin(Fps(29.97f)));
73 EXPECT_TRUE(Fps(30.0f).greaterThanWithMargin(Fps(29.97f)));
74 EXPECT_FALSE(equalsInBuckets(Fps(30.0f), Fps(29.97f)));
75 EXPECT_FALSE(equalsWithMargin(Fps(30.0f), Fps(29.97f)));
76 EXPECT_NE(std::hash<Fps>()(Fps(30.0f)), std::hash<Fps>()(Fps(29.97f)));
77 }
78
TEST(FpsTest,getIntValue)79 TEST(FpsTest, getIntValue) {
80 EXPECT_EQ(30, Fps(30.1f).getIntValue());
81 EXPECT_EQ(31, Fps(30.9f).getIntValue());
82 EXPECT_EQ(31, Fps(30.5f).getIntValue());
83 }
84
TEST(FpsTest,equalsInBucketsImpliesEqualHashes)85 TEST(FpsTest, equalsInBucketsImpliesEqualHashes) {
86 constexpr float kStep = 1e-4f;
87 const Fps::EqualsInBuckets equals;
88 for (float fps = 30.0f; fps < 31.0f; fps += kStep) {
89 const Fps left(fps);
90 const Fps right(fps + kStep);
91 if (equals(left, right)) {
92 ASSERT_EQ(std::hash<Fps>()(left), std::hash<Fps>()(right))
93 << "left= " << left << " right=" << right;
94 }
95 }
96 }
97
98 } // namespace android
99