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// Copyright 2015 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 "chrome/browser/data_usage/tab_id_provider.h"
#include <stdint.h>
#include "base/bind.h"
#include "base/callback.h"
#include "base/location.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop/message_loop.h"
#include "base/run_loop.h"
#include "base/single_thread_task_runner.h"
#include "base/task_runner.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace chrome_browser_data_usage {
namespace {
const int32_t kTabId = 10;
class TabIdProviderTest : public testing::Test {
public:
TabIdProviderTest()
: task_runner_(base::MessageLoop::current()->task_runner()),
tab_id_getter_call_count_(0) {}
~TabIdProviderTest() override {}
base::Callback<int32_t(void)> TabIdGetterCallback() {
return base::Bind(&TabIdProviderTest::GetTabId, base::Unretained(this));
}
base::TaskRunner* task_runner() { return task_runner_.get(); }
base::RunLoop* run_loop() { return &run_loop_; }
int tab_id_getter_call_count() const { return tab_id_getter_call_count_; }
private:
int32_t GetTabId() {
++tab_id_getter_call_count_;
return kTabId;
}
base::MessageLoop message_loop_;
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
base::RunLoop run_loop_;
int tab_id_getter_call_count_;
DISALLOW_COPY_AND_ASSIGN(TabIdProviderTest);
};
// Copies |tab_id| into |capture|.
void CaptureTabId(int32_t* capture, int32_t tab_id) {
*capture = tab_id;
}
TEST_F(TabIdProviderTest, ProvideTabId) {
TabIdProvider provider(task_runner(), FROM_HERE, TabIdGetterCallback());
int32_t tab_id = -1;
provider.ProvideTabId(base::Bind(&CaptureTabId, &tab_id));
run_loop()->RunUntilIdle();
EXPECT_EQ(1, tab_id_getter_call_count());
EXPECT_EQ(kTabId, tab_id);
}
TEST_F(TabIdProviderTest, ProvideTabIdPiggyback) {
TabIdProvider provider(task_runner(), FROM_HERE, TabIdGetterCallback());
// First, ask for the first tab ID to kick things off.
int32_t first_tab_id = -1;
provider.ProvideTabId(base::Bind(&CaptureTabId, &first_tab_id));
// The first tab ID callback should still be pending, with the tab ID not
// available yet, so this second callback should piggyback off of the first
// callback.
int32_t piggyback_tab_id = -1;
provider.ProvideTabId(base::Bind(&CaptureTabId, &piggyback_tab_id));
run_loop()->RunUntilIdle();
// The tab ID getter callback should only have been called once.
EXPECT_EQ(1, tab_id_getter_call_count());
EXPECT_EQ(kTabId, first_tab_id);
EXPECT_EQ(kTabId, piggyback_tab_id);
}
TEST_F(TabIdProviderTest, ProvideTabIdCacheHit) {
TabIdProvider provider(task_runner(), FROM_HERE, TabIdGetterCallback());
// First, ask for the first tab ID to kick things off.
int32_t first_tab_id = -1;
provider.ProvideTabId(base::Bind(&CaptureTabId, &first_tab_id));
// Wait for the first tab ID callback to finish.
run_loop()->RunUntilIdle();
EXPECT_EQ(1, tab_id_getter_call_count());
EXPECT_EQ(kTabId, first_tab_id);
// Ask for another tab ID, which should be satisfied by the cached tab ID from
// the first callback.
int32_t cache_hit_tab_id = -1;
provider.ProvideTabId(base::Bind(&CaptureTabId, &cache_hit_tab_id));
// This cache hit callback should run synchronously, without causing the tab
// ID getter callback to run again.
EXPECT_EQ(1, tab_id_getter_call_count());
EXPECT_EQ(kTabId, cache_hit_tab_id);
}
TEST_F(TabIdProviderTest, ProvideTabIdAfterProviderDestroyed) {
scoped_ptr<TabIdProvider> provider(
new TabIdProvider(task_runner(), FROM_HERE, TabIdGetterCallback()));
// Ask for two tab IDs.
int32_t first_tab_id = -1, second_tab_id = -1;
provider->ProvideTabId(base::Bind(&CaptureTabId, &first_tab_id));
provider->ProvideTabId(base::Bind(&CaptureTabId, &second_tab_id));
// Then, destroy the |provider| before the tab ID getter callback or any other
// callbacks are run.
provider.reset();
// The callbacks should still complete successfully later even though the
// |provider| no longer exists.
run_loop()->RunUntilIdle();
EXPECT_EQ(1, tab_id_getter_call_count());
EXPECT_EQ(kTabId, first_tab_id);
EXPECT_EQ(kTabId, second_tab_id);
}
} // namespace
} // namespace chrome_browser_data_usage
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