1 /*
2  * Copyright 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 #include <ftl/fake_guard.h>
18 #include <gtest/gtest.h>
19 
20 #include <functional>
21 #include <mutex>
22 
23 namespace android::test {
24 
25 // Keep in sync with example usage in header file.
TEST(FakeGuard,Example)26 TEST(FakeGuard, Example) {
27   struct {
28     std::mutex mutex;
29     int x FTL_ATTRIBUTE(guarded_by(mutex)) = -1;
30 
31     int f() {
32       {
33         ftl::FakeGuard guard(mutex);
34         x = 0;
35       }
36 
37       return FTL_FAKE_GUARD(mutex, x + 1);
38     }
39 
40     std::function<int()> g() const {
41       return [this]() FTL_FAKE_GUARD(mutex) { return x; };
42     }
43   } s;
44 
45   EXPECT_EQ(s.f(), 1);
46   EXPECT_EQ(s.g()(), 0);
47 }
48 
49 }  // namespace android::test
50