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/debug/task_trace.h"
6
7 #include <ostream>
8
9 #include "base/memory/raw_ptr.h"
10 #include "base/memory/raw_ref.h"
11 #include "base/run_loop.h"
12 #include "base/task/single_thread_task_runner.h"
13 #include "base/test/bind.h"
14 #include "base/test/task_environment.h"
15 #include "testing/gtest/include/gtest/gtest.h"
16
17 namespace base {
18 namespace debug {
19
TEST(TaskTraceTest,NoTask)20 TEST(TaskTraceTest, NoTask) {
21 TaskTrace task_trace;
22 EXPECT_TRUE(task_trace.empty());
23 std::array<const void*, 4> addresses = {0};
24 EXPECT_EQ(task_trace.GetAddresses(addresses), 0ul);
25 }
26
27 class ThreeTasksTest {
28 public:
ThreeTasksTest()29 ThreeTasksTest() {}
30
Run()31 void Run() {
32 task_runner->PostTask(FROM_HERE, base::BindOnce(&ThreeTasksTest::TaskA,
33 base::Unretained(this)));
34 task_environment.RunUntilIdle();
35 }
36
TaskA()37 void TaskA() {
38 TaskTrace task_trace;
39 EXPECT_FALSE(task_trace.empty());
40 std::array<const void*, 4> addresses = {0};
41 EXPECT_EQ(task_trace.GetAddresses(addresses), 1ul);
42 task_a_address = addresses[0];
43 task_runner->PostTask(FROM_HERE, base::BindOnce(&ThreeTasksTest::TaskB,
44 base::Unretained(this)));
45 }
46
TaskB()47 void TaskB() {
48 TaskTrace task_trace;
49 EXPECT_FALSE(task_trace.empty());
50 std::array<const void*, 4> addresses = {0};
51 EXPECT_EQ(task_trace.GetAddresses(addresses), 2ul);
52 task_b_address = addresses[0];
53 EXPECT_EQ(addresses[1], task_a_address);
54 task_runner->PostTask(FROM_HERE, base::BindOnce(&ThreeTasksTest::TaskC,
55 base::Unretained(this)));
56 }
57
TaskC()58 void TaskC() {
59 TaskTrace task_trace;
60 EXPECT_FALSE(task_trace.empty());
61 std::array<const void*, 4> addresses;
62 EXPECT_EQ(task_trace.GetAddresses(addresses), 3ul);
63 EXPECT_EQ(addresses[1], task_b_address);
64 EXPECT_EQ(addresses[2], task_a_address);
65 }
66
67 private:
68 base::test::TaskEnvironment task_environment;
69 const raw_ref<base::SingleThreadTaskRunner> task_runner{
70 *task_environment.GetMainThreadTaskRunner()};
71
72 raw_ptr<const void> task_a_address = nullptr;
73 raw_ptr<const void> task_b_address = nullptr;
74 };
75
TEST(TaskTraceTest,ThreeTasks)76 TEST(TaskTraceTest, ThreeTasks) {
77 ThreeTasksTest().Run();
78 }
79
80 } // namespace debug
81 } // namespace base
82