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/message_loops/message_loop.h>
17
18 using base::BindOnce;
19 using base::Time;
20 using base::TimeDelta;
21 using std::vector;
22
23 namespace brillo {
24
25 using TaskId = MessageLoop::TaskId;
26
27 class FakeMessageLoopTest : public ::testing::Test {
28 protected:
SetUp()29 void SetUp() override {
30 loop_.reset(new FakeMessageLoop(nullptr));
31 EXPECT_TRUE(loop_.get());
32 }
TearDown()33 void TearDown() override {
34 EXPECT_FALSE(loop_->PendingTasks());
35 }
36
37 base::SimpleTestClock clock_;
38 std::unique_ptr<FakeMessageLoop> loop_;
39 };
40
TEST_F(FakeMessageLoopTest,CancelTaskInvalidValuesTest)41 TEST_F(FakeMessageLoopTest, CancelTaskInvalidValuesTest) {
42 EXPECT_FALSE(loop_->CancelTask(MessageLoop::kTaskIdNull));
43 EXPECT_FALSE(loop_->CancelTask(1234));
44 }
45
TEST_F(FakeMessageLoopTest,PostDelayedTaskRunsInOrder)46 TEST_F(FakeMessageLoopTest, PostDelayedTaskRunsInOrder) {
47 vector<int> order;
48 loop_->PostDelayedTask(
49 BindOnce([](vector<int>* order) { order->push_back(1); }, &order),
50 TimeDelta::FromSeconds(1));
51 loop_->PostDelayedTask(
52 BindOnce([](vector<int>* order) { order->push_back(4); }, &order),
53 TimeDelta::FromSeconds(4));
54 loop_->PostDelayedTask(
55 BindOnce([](vector<int>* order) { order->push_back(3); }, &order),
56 TimeDelta::FromSeconds(3));
57 loop_->PostDelayedTask(
58 BindOnce([](vector<int>* order) { order->push_back(2); }, &order),
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,PendingTasksTest)88 TEST_F(FakeMessageLoopTest, PendingTasksTest) {
89 loop_->PostDelayedTask(base::DoNothing(), TimeDelta::FromSeconds(1));
90 EXPECT_TRUE(loop_->PendingTasks());
91 loop_->Run();
92 }
93
94 } // namespace brillo
95