chromium/chrome/browser/media/webrtc/tab_capture_access_handler_unittest.cc

// 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/media/webrtc/tab_capture_access_handler.h"

#include <memory>
#include <string>
#include <utility>

#include "base/functional/bind.h"
#include "base/run_loop.h"
#include "build/build_config.h"
#include "chrome/browser/extensions/api/tab_capture/tab_capture_registry.h"
#include "chrome/browser/media/webrtc/fake_desktop_media_picker_factory.h"
#include "chrome/test/base/chrome_render_view_host_test_harness.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/desktop_media_id.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/web_contents.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/public/common/mediastream/media_stream_request.h"
#include "third_party/blink/public/mojom/mediastream/media_stream.mojom-shared.h"
#include "third_party/blink/public/mojom/mediastream/media_stream.mojom.h"

#if BUILDFLAG(IS_CHROMEOS)
#include "chrome/browser/chromeos/policy/dlp/dlp_content_manager.h"
#include "chrome/browser/chromeos/policy/dlp/test/mock_dlp_content_manager.h"
#endif  // BUILDFLAG(IS_CHROMEOS)

namespace {
constexpr char kOrigin[] = …;
constexpr blink::mojom::MediaStreamRequestResult kInvalidResult = …;
}  // namespace

class TabCaptureAccessHandlerTest : public ChromeRenderViewHostTestHarness { … };

TEST_F(TabCaptureAccessHandlerTest, PermissionGiven) { … }

#if BUILDFLAG(IS_CHROMEOS)
TEST_F(TabCaptureAccessHandlerTest, DlpRestricted) {
  const content::DesktopMediaID source(
      content::DesktopMediaID::TYPE_WEB_CONTENTS,
      content::DesktopMediaID::kNullId,
      content::WebContentsMediaCaptureId(
          web_contents()->GetPrimaryMainFrame()->GetProcess()->GetID(),
          web_contents()->GetPrimaryMainFrame()->GetRoutingID()));

  // Setup Data Leak Prevention restriction.
  policy::MockDlpContentManager mock_dlp_content_manager;
  policy::ScopedDlpContentObserverForTesting scoped_dlp_content_manager(
      &mock_dlp_content_manager);
  EXPECT_CALL(mock_dlp_content_manager, CheckScreenShareRestriction)
      .WillOnce([](const content::DesktopMediaID& media_id,
                   const std::u16string& application_title,
                   base::OnceCallback<void(bool)> callback) {
        std::move(callback).Run(/*should_proceed=*/false);
      });

  extensions::TabCaptureRegistry::Get(profile())->AddRequest(
      web_contents(), /*extension_id=*/"", /*is_anonymous=*/false,
      GURL(kOrigin), source, process_id(), main_frame_id());

  blink::mojom::MediaStreamRequestResult result = kInvalidResult;
  blink::mojom::StreamDevices devices;
  ProcessRequest(source, &result, &devices);

  EXPECT_EQ(blink::mojom::MediaStreamRequestResult::PERMISSION_DENIED, result);
  EXPECT_FALSE(devices.video_device.has_value());
  EXPECT_FALSE(devices.audio_device.has_value());
}

TEST_F(TabCaptureAccessHandlerTest, DlpNotRestricted) {
  const content::DesktopMediaID source(
      content::DesktopMediaID::TYPE_WEB_CONTENTS,
      content::DesktopMediaID::kNullId,
      content::WebContentsMediaCaptureId(
          web_contents()->GetPrimaryMainFrame()->GetProcess()->GetID(),
          web_contents()->GetPrimaryMainFrame()->GetRoutingID()));

  // Setup Data Leak Prevention restriction.
  policy::MockDlpContentManager mock_dlp_content_manager;
  policy::ScopedDlpContentObserverForTesting scoped_dlp_content_manager(
      &mock_dlp_content_manager);
  EXPECT_CALL(mock_dlp_content_manager, CheckScreenShareRestriction)
      .WillOnce([](const content::DesktopMediaID& media_id,
                   const std::u16string& application_title,
                   base::OnceCallback<void(bool)> callback) {
        std::move(callback).Run(/*should_proceed=*/true);
      });

  extensions::TabCaptureRegistry::Get(profile())->AddRequest(
      web_contents(), /*extension_id=*/"", /*is_anonymous=*/false,
      GURL(kOrigin), source, process_id(), main_frame_id());

  blink::mojom::MediaStreamRequestResult result = kInvalidResult;
  blink::mojom::StreamDevices devices;
  ProcessRequest(source, &result, &devices);

  EXPECT_EQ(blink::mojom::MediaStreamRequestResult::OK, result);
  EXPECT_TRUE(devices.video_device.has_value());
  EXPECT_FALSE(devices.audio_device.has_value());
}

TEST_F(TabCaptureAccessHandlerTest, DlpWebContentsDestroyed) {
  const content::DesktopMediaID source(
      content::DesktopMediaID::TYPE_WEB_CONTENTS,
      content::DesktopMediaID::kNullId,
      content::WebContentsMediaCaptureId(
          web_contents()->GetPrimaryMainFrame()->GetProcess()->GetID(),
          web_contents()->GetPrimaryMainFrame()->GetRoutingID()));

  // Setup Data Leak Prevention restriction.
  policy::MockDlpContentManager mock_dlp_content_manager;
  policy::ScopedDlpContentObserverForTesting scoped_dlp_content_manager(
      &mock_dlp_content_manager);
  EXPECT_CALL(mock_dlp_content_manager, CheckScreenShareRestriction)
      .WillOnce([&](const content::DesktopMediaID& media_id,
                    const std::u16string& application_title,
                    base::OnceCallback<void(bool)> callback) {
        DeleteContents();
        std::move(callback).Run(/*should_proceed=*/true);
      });

  extensions::TabCaptureRegistry::Get(profile())->AddRequest(
      web_contents(), /*extension_id=*/"", /*is_anonymous=*/false,
      GURL(kOrigin), source, process_id(), main_frame_id());

  blink::mojom::MediaStreamRequestResult result = kInvalidResult;
  blink::mojom::StreamDevices devices;
  ProcessRequest(source, &result, &devices, /*expect_result=*/false);

  EXPECT_EQ(kInvalidResult, result);
  EXPECT_FALSE(devices.video_device.has_value());
  EXPECT_FALSE(devices.audio_device.has_value());
}

#endif  // BUILDFLAG(IS_CHROMEOS)