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 <gtest/gtest.h>
18 #include <ui/DisplayId.h>
19
20 #include <algorithm>
21 #include <iterator>
22 #include <vector>
23
24 #include "DisplayIdGenerator.h"
25
26 namespace android {
27
28 template <typename Id>
testGenerateId()29 void testGenerateId() {
30 DisplayIdGenerator<Id> generator;
31
32 std::vector<std::optional<Id>> ids;
33 std::generate_n(std::back_inserter(ids), 10, [&] { return generator.generateId(); });
34
35 // All IDs should be different.
36 for (auto it = ids.begin(); it != ids.end(); ++it) {
37 EXPECT_TRUE(*it);
38
39 for (auto dup = it + 1; dup != ids.end(); ++dup) {
40 EXPECT_NE(*it, *dup);
41 }
42 }
43 }
44
TEST(DisplayIdGeneratorTest,generateGpuVirtualDisplayId)45 TEST(DisplayIdGeneratorTest, generateGpuVirtualDisplayId) {
46 testGenerateId<GpuVirtualDisplayId>();
47 }
48
TEST(DisplayIdGeneratorTest,generateHalVirtualDisplayId)49 TEST(DisplayIdGeneratorTest, generateHalVirtualDisplayId) {
50 testGenerateId<HalVirtualDisplayId>();
51 }
52
TEST(DisplayIdGeneratorTest,releaseId)53 TEST(DisplayIdGeneratorTest, releaseId) {
54 constexpr size_t kMaxIdsCount = 5;
55 DisplayIdGenerator<GpuVirtualDisplayId> generator(kMaxIdsCount);
56
57 const auto id = generator.generateId();
58 EXPECT_TRUE(id);
59
60 for (size_t i = 1; i < kMaxIdsCount; i++) {
61 EXPECT_TRUE(generator.generateId());
62 }
63
64 EXPECT_FALSE(generator.generateId());
65
66 generator.releaseId(*id);
67 EXPECT_TRUE(generator.generateId());
68 }
69
TEST(DisplayIdGeneratorTest,maxIdsCount)70 TEST(DisplayIdGeneratorTest, maxIdsCount) {
71 constexpr size_t kMaxIdsCount = 5;
72 DisplayIdGenerator<GpuVirtualDisplayId> generator(kMaxIdsCount);
73
74 for (size_t i = 0; i < kMaxIdsCount; i++) {
75 EXPECT_TRUE(generator.generateId());
76 }
77
78 EXPECT_FALSE(generator.generateId());
79 }
80
81 } // namespace android
82