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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/visibility_timer_tab_helper.h"
#include "base/test/bind.h"
#include "base/test/task_environment.h"
#include "chrome/test/base/chrome_render_view_host_test_harness.h"
#include "content/public/browser/web_contents.h"
class VisibilityTimerTabHelperTest : public ChromeRenderViewHostTestHarness {
public:
VisibilityTimerTabHelperTest()
: ChromeRenderViewHostTestHarness(
base::test::TaskEnvironment::TimeSource::MOCK_TIME) {}
};
TEST_F(VisibilityTimerTabHelperTest, Delay) {
bool task_executed = false;
VisibilityTimerTabHelper::CreateForWebContents(web_contents());
VisibilityTimerTabHelper::FromWebContents(web_contents())
->PostTaskAfterVisibleDelay(FROM_HERE,
base::BindLambdaForTesting([&task_executed] {
EXPECT_FALSE(task_executed);
task_executed = true;
}),
base::Seconds(1));
EXPECT_FALSE(task_executed);
// The task will be executed after 1 second, but the timer is reset whenever
// the tab is not visible, so these 500ms never add up to >= 1 second.
for (int n = 0; n < 10; n++) {
web_contents()->WasShown();
task_environment()->FastForwardBy(base::Milliseconds(500));
web_contents()->WasHidden();
}
EXPECT_FALSE(task_executed);
// Time elapsed whilst hidden is not counted.
// n.b. This line also clears out any old scheduled timer tasks. This is
// important, because otherwise Timer::Reset (triggered by
// VisibilityTimerTabHelper::WasShown) may choose to re-use an existing
// scheduled task, and when it fires Timer::RunScheduledTask will call
// TimeTicks::Now() (which unlike task_environment()->NowTicks(), we can't
// fake), and miscalculate the remaining delay at which to fire the timer.
task_environment()->FastForwardBy(base::Days(1));
EXPECT_FALSE(task_executed);
// So 500ms is still not enough.
web_contents()->WasShown();
task_environment()->FastForwardBy(base::Milliseconds(500));
EXPECT_FALSE(task_executed);
// But 5*500ms > 1 second, so it should now be blocked.
for (int n = 0; n < 4; n++)
task_environment()->FastForwardBy(base::Milliseconds(500));
EXPECT_TRUE(task_executed);
}
TEST_F(VisibilityTimerTabHelperTest, TasksAreQueuedInDormantState) {
std::string tasks_executed;
VisibilityTimerTabHelper::CreateForWebContents(web_contents());
VisibilityTimerTabHelper::FromWebContents(web_contents())
->PostTaskAfterVisibleDelay(
FROM_HERE, base::BindLambdaForTesting([&] { tasks_executed += "1"; }),
base::Seconds(1));
web_contents()->WasShown();
task_environment()->FastForwardBy(base::Milliseconds(500));
// Add second task. Its timer does not advance until after the first task
// completes.
VisibilityTimerTabHelper::FromWebContents(web_contents())
->PostTaskAfterVisibleDelay(
FROM_HERE, base::BindLambdaForTesting([&] { tasks_executed += "2"; }),
base::Seconds(1));
web_contents()->WasHidden();
web_contents()->WasShown();
task_environment()->FastForwardBy(base::Milliseconds(990));
EXPECT_EQ("", tasks_executed);
task_environment()->FastForwardBy(base::Milliseconds(11));
EXPECT_EQ("1", tasks_executed);
task_environment()->FastForwardBy(base::Milliseconds(1000));
EXPECT_EQ("12", tasks_executed);
}
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