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// Copyright 2025 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/ui/tabs/tab_creation_metrics_controller.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/task_environment.h"
#include "base/test/test_mock_time_task_runner.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_commands.h"
#include "chrome/browser/ui/browser_tabstrip.h"
#include "chrome/browser/ui/tabs/tab_group_model.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/test/base/in_process_browser_test.h"
#include "chrome/test/base/ui_test_utils.h"
#include "components/tab_groups/tab_group_id.h"
#include "components/tab_groups/tab_group_visual_data.h"
#include "components/tabs/public/tab_group.h"
#include "content/public/test/browser_task_environment.h"
#include "content/public/test/browser_test.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"
#include "url/url_constants.h"
namespace tabs {
constexpr char kHistogramName[] = "Tab.GroupingTransition";
class TabCreationMetricsTest : public InProcessBrowserTest {
public:
TabCreationMetricsTest()
: task_runner_(base::MakeRefCounted<base::TestMockTimeTaskRunner>()) {}
void SetUpOnMainThread() override {
TabCreationMetricsController::SetTaskRunnerForTesting(task_runner_);
}
void TearDownOnMainThread() override {
TabCreationMetricsController::SetTaskRunnerForTesting(nullptr);
}
protected:
TabStripModel* tab_strip_model() { return browser()->tab_strip_model(); }
int TabCount() { return browser()->tab_strip_model()->count(); }
void AppendTab() {
chrome::AddTabAt(browser(), GURL(), -1, /*foreground=*/true);
}
void AppendTabToEndOfGroup(tab_groups::TabGroupId group_id) {
const auto tabs =
tab_strip_model()->group_model()->GetTabGroup(group_id)->ListTabs();
tab_strip_model()->delegate()->AddTabAt(GURL(), /*index=*/tabs.end(),
/*foreground=*/true, group_id);
tab_strip_model()->ActivateTabAt(tabs.end());
}
tab_groups::TabGroupId AddTabToNewGroup(int tab_index) {
tab_groups::TabGroupId group_id =
tab_strip_model()->AddToNewGroup({tab_index});
tab_strip_model()->ActivateTabAt(tab_index);
return group_id;
}
void AddTabToExistingGroup(int tab_index, tab_groups::TabGroupId group_id) {
tab_strip_model()->AddToExistingGroup({tab_index}, group_id);
tab_strip_model()->ActivateTabAt(tab_index);
}
void UngroupTab(int tab_index) {
tab_strip_model()->RemoveFromGroup({tab_index});
tab_strip_model()->ActivateTabAt(tab_index);
}
void FastForwardPastDelay() {
task_runner_->FastForwardBy(TabCreationMetricsController::kDelay +
base::Seconds(1));
}
scoped_refptr<base::TestMockTimeTaskRunner> task_runner_;
};
IN_PROC_BROWSER_TEST_F(TabCreationMetricsTest, UngroupedToUngrouped) {
base::HistogramTester histogram_tester;
AppendTab();
FastForwardPastDelay();
histogram_tester.ExpectBucketCount(
kHistogramName, TabGroupingTransitionType::kUngroupedToUngrouped, 1);
histogram_tester.ExpectTotalCount(kHistogramName, 1);
}
IN_PROC_BROWSER_TEST_F(TabCreationMetricsTest, UngroupedToGrouped) {
base::HistogramTester histogram_tester;
AppendTab();
// Group the newly created tab.
AddTabToNewGroup(TabCount() - 1);
FastForwardPastDelay();
histogram_tester.ExpectBucketCount(
kHistogramName, TabGroupingTransitionType::kUngroupedToGrouped, 1);
histogram_tester.ExpectTotalCount(kHistogramName, 1);
}
IN_PROC_BROWSER_TEST_F(TabCreationMetricsTest, GroupedToUngrouped) {
// Create a tab group with a tab.
AppendTab();
tab_groups::TabGroupId active_group_id = AddTabToNewGroup(TabCount() - 1);
FastForwardPastDelay();
base::HistogramTester histogram_tester;
// Create a new tab in the active group.
AppendTabToEndOfGroup(active_group_id);
// Ungroup the newly created tab from the active group.
UngroupTab(TabCount() - 1);
FastForwardPastDelay();
histogram_tester.ExpectBucketCount(
kHistogramName, TabGroupingTransitionType::kGroupedToUngrouped, 1);
histogram_tester.ExpectTotalCount(kHistogramName, 1);
}
IN_PROC_BROWSER_TEST_F(TabCreationMetricsTest, GroupedToInPreviousGroup) {
// Create a tab group with a tab.
AppendTab();
tab_groups::TabGroupId group_id = AddTabToNewGroup(TabCount() - 1);
FastForwardPastDelay();
base::HistogramTester histogram_tester;
// Create a new tab in the active group.
AppendTabToEndOfGroup(group_id);
FastForwardPastDelay();
histogram_tester.ExpectBucketCount(
kHistogramName, TabGroupingTransitionType::kGroupedToInPreviousGroup, 1);
histogram_tester.ExpectTotalCount(kHistogramName, 1);
}
IN_PROC_BROWSER_TEST_F(TabCreationMetricsTest, GroupedToOutsidePreviousGroup) {
// Create group A.
AppendTab();
tab_groups::TabGroupId group_id_a = AddTabToNewGroup(TabCount() - 1);
// Create group B.
AppendTab();
tab_groups::TabGroupId group_id_b = AddTabToNewGroup(TabCount() - 1);
FastForwardPastDelay();
base::HistogramTester histogram_tester;
// Add tab to group A then move to group B.
AppendTabToEndOfGroup(group_id_a);
AddTabToExistingGroup(1, group_id_b);
FastForwardPastDelay();
histogram_tester.ExpectBucketCount(
kHistogramName, TabGroupingTransitionType::kGroupedToOutsidePreviousGroup,
1);
histogram_tester.ExpectTotalCount(kHistogramName, 1);
}
} // namespace tabs
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