1 // Copyright 2019 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "base/message_loop/work_id_provider.h"
6
7 #include <limits>
8 #include <memory>
9 #include <utility>
10
11 #include "base/functional/callback.h"
12 #include "base/test/bind.h"
13 #include "base/threading/simple_thread.h"
14 #include "testing/gtest/include/gtest/gtest.h"
15
16 namespace base {
17
18 namespace {
19
20 class TestThread : public SimpleThread {
21 public:
TestThread(OnceCallback<void (WorkIdProvider *)> validate_func)22 TestThread(OnceCallback<void(WorkIdProvider*)> validate_func)
23 : SimpleThread("WorkIdProviderTestThread"),
24 validate_func_(std::move(validate_func)) {}
25
Run()26 void Run() override {
27 std::move(validate_func_).Run(WorkIdProvider::GetForCurrentThread());
28 }
29
30 private:
31 OnceCallback<void(WorkIdProvider*)> validate_func_;
32 };
33
34 template <class Func>
RunTest(const Func & func)35 void RunTest(const Func& func) {
36 TestThread thread(BindLambdaForTesting(func));
37
38 thread.Start();
39 thread.Join();
40 }
41
42 } // namespace
43
TEST(WorkIdProviderTest,StartsAtZero)44 TEST(WorkIdProviderTest, StartsAtZero) {
45 RunTest(
46 [](WorkIdProvider* provider) { EXPECT_EQ(0u, provider->GetWorkId()); });
47 }
48
TEST(WorkIdProviderTest,Increment)49 TEST(WorkIdProviderTest, Increment) {
50 RunTest([](WorkIdProvider* provider) {
51 provider->IncrementWorkIdForTesting();
52 EXPECT_EQ(1u, provider->GetWorkId());
53
54 provider->IncrementWorkIdForTesting();
55 EXPECT_EQ(2u, provider->GetWorkId());
56
57 provider->IncrementWorkIdForTesting();
58 EXPECT_EQ(3u, provider->GetWorkId());
59 });
60 }
61
TEST(WorkIdProviderTest,SkipsZeroOnOverflow)62 TEST(WorkIdProviderTest, SkipsZeroOnOverflow) {
63 RunTest([](WorkIdProvider* provider) {
64 provider->SetCurrentWorkIdForTesting(
65 std::numeric_limits<unsigned int>::max());
66 provider->IncrementWorkIdForTesting();
67 EXPECT_EQ(1u, provider->GetWorkId());
68 });
69 }
70
71 } // namespace base
72