chrome/browser/window_management/screen_details_browsertest.cc

// Copyright 2022 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/devtools/devtools_window_testing.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/test/base/chrome_test_utils.h"
#include "chrome/test/base/in_process_browser_test.h"
#include "chrome/test/base/ui_test_utils.h"
#include "components/permissions/permission_request_manager.h"
#include "content/browser/screen_details/screen_details_test_utils.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/web_contents.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "third_party/blink/public/common/features.h"

using ScreenDetailsTest = InProcessBrowserTest;

// Tests the basic structure and values of the ScreenDetails API.
// TODO(crbug.com/1119974): Need content_browsertests permission controls.
IN_PROC_BROWSER_TEST_F(ScreenDetailsTest, GetScreenDetailsBasic) {
  auto* tab = chrome_test_utils::GetActiveWebContents(this);
  ASSERT_TRUE(embedded_test_server()->Start());
  ASSERT_TRUE(ui_test_utils::NavigateToURL(
      browser(), embedded_test_server()->GetURL("/empty.html")));

  // Auto-accept the permission request.
  permissions::PermissionRequestManager* permission_request_manager_tab =
      permissions::PermissionRequestManager::FromWebContents(tab);
  permission_request_manager_tab->set_auto_response_for_test(
      permissions::PermissionRequestManager::ACCEPT_ALL);

  ASSERT_TRUE(EvalJs(tab, "'getScreenDetails' in self").ExtractBool());
  content::EvalJsResult result =
      EvalJs(tab, content::test::kGetScreenDetailsScript);
  EXPECT_EQ(content::test::GetExpectedScreenDetails(), result.value);
}

class ScreenDetailsFullscreenScreenSizeTest
    : public ScreenDetailsTest,
      public testing::WithParamInterface<bool> {
 public:
  ScreenDetailsFullscreenScreenSizeTest() {
    scoped_feature_list_.InitWithFeatureState(
        blink::features::kFullscreenScreenSizeMatchesDisplay,
        FullscreenScreenSizeMatchesDisplayEnabled());
  }
  bool FullscreenScreenSizeMatchesDisplayEnabled() { return GetParam(); }

 private:
  base::test::ScopedFeatureList scoped_feature_list_;
};

INSTANTIATE_TEST_SUITE_P(All,
                         ScreenDetailsFullscreenScreenSizeTest,
                         testing::Bool());

// Test screen size in fullscreen. ScreenDetailed always yields display metrics,
// but `window.screen` may yield smaller viewport dimensions while the frame is
// fullscreen as a speculative site compatibility measure, because web authors
// may assume that screen dimensions match window.innerWidth/innerHeight while a
// page is fullscreen, but that is not always true. crbug.com/1367416
// TODO(crbug.com/1119974): Need content_browsertests permission controls.
IN_PROC_BROWSER_TEST_P(ScreenDetailsFullscreenScreenSizeTest, FullscreenSize) {
  auto* tab = chrome_test_utils::GetActiveWebContents(this);
  ASSERT_TRUE(embedded_test_server()->Start());
  ASSERT_TRUE(ui_test_utils::NavigateToURL(
      browser(), embedded_test_server()->GetURL("/empty.html")));

  // Auto-accept the permission request.
  permissions::PermissionRequestManager::FromWebContents(tab)
      ->set_auto_response_for_test(
          permissions::PermissionRequestManager::ACCEPT_ALL);

  constexpr char kGetCurrentScreenSizeScript[] = R"JS(
    window.getScreenDetails().then(sD => {
        return `${sD.currentScreen.width}x${sD.currentScreen.height}`;
    });
  )JS";

  // Check initial dimensions before entering fullscreen.
  ASSERT_FALSE(tab->IsFullscreen());
  const std::string display_size =
      tab->GetRenderWidgetHostView()->GetScreenInfo().rect.size().ToString();
  EXPECT_EQ(display_size, EvalJs(tab, "`${screen.width}x${screen.height}`"));
  EXPECT_NE(display_size, EvalJs(tab, "`${innerWidth}x${innerHeight}`"));
  EXPECT_EQ(display_size, EvalJs(tab, kGetCurrentScreenSizeScript));

  // Check dimensions after entering fullscreen yields a `resize`, and after
  // docking DevTools yields a `resize` as the fullscreen content area shrinks.
  constexpr char kEnterFullscreenAndResizeScript[] = R"JS(
    Promise.all([ document.documentElement.requestFullscreen(),
                  new Promise(r => { onresize = r; })
                ]).then(() => {
                  window.nextResize = new Promise(r => { onresize = r; });
                  return !!document.fullscreenElement;
                });
  )JS";
  ASSERT_TRUE(EvalJs(tab, kEnterFullscreenAndResizeScript).ExtractBool());
  DevToolsWindowTesting::OpenDevToolsWindowSync(tab, true);
  ASSERT_TRUE(EvalJs(tab, "window.nextResize").error.empty());
  ASSERT_TRUE(tab->IsFullscreen());
  if (FullscreenScreenSizeMatchesDisplayEnabled()) {
    // `window.screen` dimensions match the display size.
    EXPECT_EQ(display_size, EvalJs(tab, "`${screen.width}x${screen.height}`"));
    EXPECT_NE(EvalJs(tab, "`${screen.width}x${screen.height}`").ExtractString(),
              EvalJs(tab, "`${innerWidth}x${innerHeight}`").ExtractString());
  } else {
    // `window.screen` dimensions match the smaller viewport size.
    EXPECT_NE(display_size, EvalJs(tab, "`${screen.width}x${screen.height}`"));
    EXPECT_EQ(EvalJs(tab, "`${screen.width}x${screen.height}`").ExtractString(),
              EvalJs(tab, "`${innerWidth}x${innerHeight}`").ExtractString());
  }
  EXPECT_EQ(display_size, EvalJs(tab, kGetCurrentScreenSizeScript));

  // Check dimensions again after exiting fullscreen yields a `resize`.
  constexpr char kExitFullscreenAndResizeScript[] = R"JS(
    Promise.all([ document.exitFullscreen(),
                  new Promise(r => { onresize = r; })
                ]).then(() => {
                  return !document.fullscreenElement;
                });
  )JS";
  ASSERT_TRUE(EvalJs(tab, kExitFullscreenAndResizeScript).ExtractBool());
  ASSERT_FALSE(tab->IsFullscreen());
  EXPECT_EQ(display_size, EvalJs(tab, "`${screen.width}x${screen.height}`"));
  EXPECT_EQ(display_size, EvalJs(tab, kGetCurrentScreenSizeScript));
}