1 // Copyright 2015 The Chromium OS Authors. All rights reserved.
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 <brillo/message_loops/fake_message_loop.h>
6
7 #include <memory>
8 #include <vector>
9
10 #include <base/bind.h>
11 #include <base/bind_helpers.h>
12 #include <base/location.h>
13 #include <base/test/simple_test_clock.h>
14 #include <gtest/gtest.h>
15
16 #include <brillo/bind_lambda.h>
17 #include <brillo/message_loops/message_loop.h>
18
19 using base::Bind;
20 using base::Time;
21 using base::TimeDelta;
22 using std::vector;
23
24 namespace brillo {
25
26 using TaskId = MessageLoop::TaskId;
27
28 class FakeMessageLoopTest : public ::testing::Test {
29 protected:
SetUp()30 void SetUp() override {
31 loop_.reset(new FakeMessageLoop(nullptr));
32 EXPECT_TRUE(loop_.get());
33 }
TearDown()34 void TearDown() override {
35 EXPECT_FALSE(loop_->PendingTasks());
36 }
37
38 base::SimpleTestClock clock_;
39 std::unique_ptr<FakeMessageLoop> loop_;
40 };
41
TEST_F(FakeMessageLoopTest,CancelTaskInvalidValuesTest)42 TEST_F(FakeMessageLoopTest, CancelTaskInvalidValuesTest) {
43 EXPECT_FALSE(loop_->CancelTask(MessageLoop::kTaskIdNull));
44 EXPECT_FALSE(loop_->CancelTask(1234));
45 }
46
TEST_F(FakeMessageLoopTest,PostDelayedTaskRunsInOrder)47 TEST_F(FakeMessageLoopTest, PostDelayedTaskRunsInOrder) {
48 vector<int> order;
49 auto callback = [](std::vector<int>* order, int value) {
50 order->push_back(value);
51 };
52 loop_->PostDelayedTask(Bind(callback, base::Unretained(&order), 1),
53 TimeDelta::FromSeconds(1));
54 loop_->PostDelayedTask(Bind(callback, base::Unretained(&order), 4),
55 TimeDelta::FromSeconds(4));
56 loop_->PostDelayedTask(Bind(callback, base::Unretained(&order), 3),
57 TimeDelta::FromSeconds(3));
58 loop_->PostDelayedTask(Bind(callback, base::Unretained(&order), 2),
59 TimeDelta::FromSeconds(2));
60 // Run until all the tasks are run.
61 loop_->Run();
62 EXPECT_EQ((vector<int>{1, 2, 3, 4}), order);
63 }
64
TEST_F(FakeMessageLoopTest,PostDelayedTaskAdvancesTheTime)65 TEST_F(FakeMessageLoopTest, PostDelayedTaskAdvancesTheTime) {
66 Time start = Time::FromInternalValue(1000000);
67 clock_.SetNow(start);
68 loop_.reset(new FakeMessageLoop(&clock_));
69 loop_->PostDelayedTask(base::DoNothing(), TimeDelta::FromSeconds(1));
70 loop_->PostDelayedTask(base::DoNothing(), TimeDelta::FromSeconds(2));
71 EXPECT_FALSE(loop_->RunOnce(false));
72 // If the callback didn't run, the time shouldn't change.
73 EXPECT_EQ(start, clock_.Now());
74
75 // If we run only one callback, the time should be set to the time that
76 // callack ran.
77 EXPECT_TRUE(loop_->RunOnce(true));
78 EXPECT_EQ(start + TimeDelta::FromSeconds(1), clock_.Now());
79
80 // If the clock is advanced manually, we should be able to run the
81 // callback without blocking, since the firing time is in the past.
82 clock_.SetNow(start + TimeDelta::FromSeconds(3));
83 EXPECT_TRUE(loop_->RunOnce(false));
84 // The time should not change even if the callback is due in the past.
85 EXPECT_EQ(start + TimeDelta::FromSeconds(3), clock_.Now());
86 }
87
TEST_F(FakeMessageLoopTest,WatchFileDescriptorWaits)88 TEST_F(FakeMessageLoopTest, WatchFileDescriptorWaits) {
89 int fd = 1234;
90 // We will simulate this situation. At the beginning, we will watch for a
91 // file descriptor that won't trigger for 10s. Then we will pretend it is
92 // ready after 10s and expect its callback to run just once.
93 int called = 0;
94 TaskId task_id = loop_->WatchFileDescriptor(
95 FROM_HERE, fd, MessageLoop::kWatchRead, false,
96 Bind([](int* called) { (*called)++; }, base::Unretained(&called)));
97 EXPECT_NE(MessageLoop::kTaskIdNull, task_id);
98
99 EXPECT_NE(MessageLoop::kTaskIdNull,
100 loop_->PostDelayedTask(Bind(&FakeMessageLoop::BreakLoop,
101 base::Unretained(loop_.get())),
102 TimeDelta::FromSeconds(10)));
103 EXPECT_NE(MessageLoop::kTaskIdNull,
104 loop_->PostDelayedTask(Bind(&FakeMessageLoop::BreakLoop,
105 base::Unretained(loop_.get())),
106 TimeDelta::FromSeconds(20)));
107 loop_->Run();
108 EXPECT_EQ(0, called);
109
110 loop_->SetFileDescriptorReadiness(fd, MessageLoop::kWatchRead, true);
111 loop_->Run();
112 EXPECT_EQ(1, called);
113 EXPECT_FALSE(loop_->CancelTask(task_id));
114 }
115
TEST_F(FakeMessageLoopTest,PendingTasksTest)116 TEST_F(FakeMessageLoopTest, PendingTasksTest) {
117 loop_->PostDelayedTask(base::DoNothing(), TimeDelta::FromSeconds(1));
118 EXPECT_TRUE(loop_->PendingTasks());
119 loop_->Run();
120 }
121
122 } // namespace brillo
123