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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/common/one_shot_event.h"
#include "base/bind.h"
#include "base/run_loop.h"
#include "base/single_thread_task_runner.h"
#include "base/test/test_simple_task_runner.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace extensions {
namespace {
void Increment(int* i) { ++*i; }
TEST(OneShotEventTest, RecordsSignal) {
OneShotEvent event;
EXPECT_FALSE(event.is_signaled());
event.Signal();
EXPECT_TRUE(event.is_signaled());
}
TEST(OneShotEventTest, CallsQueue) {
OneShotEvent event;
scoped_refptr<base::TestSimpleTaskRunner> runner(
new base::TestSimpleTaskRunner);
int i = 0;
event.Post(FROM_HERE, base::Bind(&Increment, &i), runner);
event.Post(FROM_HERE, base::Bind(&Increment, &i), runner);
EXPECT_EQ(0U, runner->GetPendingTasks().size());
event.Signal();
ASSERT_EQ(2U, runner->GetPendingTasks().size());
EXPECT_NE(runner->GetPendingTasks()[0].location.line_number(),
runner->GetPendingTasks()[1].location.line_number())
<< "Make sure FROM_HERE is propagated.";
EXPECT_EQ(0, i);
runner->RunPendingTasks();
EXPECT_EQ(2, i);
}
TEST(OneShotEventTest, CallsAfterSignalDontRunInline) {
OneShotEvent event;
scoped_refptr<base::TestSimpleTaskRunner> runner(
new base::TestSimpleTaskRunner);
int i = 0;
event.Signal();
event.Post(FROM_HERE, base::Bind(&Increment, &i), runner);
EXPECT_EQ(1U, runner->GetPendingTasks().size());
EXPECT_EQ(0, i);
runner->RunPendingTasks();
EXPECT_EQ(1, i);
}
TEST(OneShotEventTest, PostDefaultsToCurrentMessageLoop) {
OneShotEvent event;
scoped_refptr<base::TestSimpleTaskRunner> runner(
new base::TestSimpleTaskRunner);
base::MessageLoop loop;
int runner_i = 0;
int loop_i = 0;
event.Post(FROM_HERE, base::Bind(&Increment, &runner_i), runner);
event.Post(FROM_HERE, base::Bind(&Increment, &loop_i));
event.Signal();
EXPECT_EQ(1U, runner->GetPendingTasks().size());
EXPECT_EQ(0, runner_i);
runner->RunPendingTasks();
EXPECT_EQ(1, runner_i);
EXPECT_EQ(0, loop_i);
base::RunLoop().RunUntilIdle();
EXPECT_EQ(1, loop_i);
}
void CheckSignaledAndPostIncrement(
OneShotEvent* event,
const scoped_refptr<base::SingleThreadTaskRunner>& runner,
int* i) {
EXPECT_TRUE(event->is_signaled());
event->Post(FROM_HERE, base::Bind(&Increment, i), runner);
}
TEST(OneShotEventTest, IsSignaledAndPostsFromCallbackWork) {
OneShotEvent event;
scoped_refptr<base::TestSimpleTaskRunner> runner(
new base::TestSimpleTaskRunner);
int i = 0;
event.Post(FROM_HERE,
base::Bind(&CheckSignaledAndPostIncrement, &event, runner, &i),
runner);
EXPECT_EQ(0, i);
event.Signal();
// CheckSignaledAndPostIncrement is queued on |runner|.
EXPECT_EQ(1U, runner->GetPendingTasks().size());
EXPECT_EQ(0, i);
runner->RunPendingTasks();
// Increment is queued on |runner|.
EXPECT_EQ(1U, runner->GetPendingTasks().size());
EXPECT_EQ(0, i);
runner->RunPendingTasks();
// Increment has run.
EXPECT_EQ(0U, runner->GetPendingTasks().size());
EXPECT_EQ(1, i);
}
} // namespace
} // namespace extensions
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