File: desktop_media_picker_controller_unittest.cc

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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <memory>
#include <tuple>
#include <utility>
#include <vector>

#include "base/strings/utf_string_conversions.h"
#include "base/test/mock_callback.h"
#include "chrome/browser/media/webrtc/desktop_media_picker.h"
#include "chrome/browser/media/webrtc/desktop_media_picker_controller.h"
#include "chrome/browser/media/webrtc/desktop_media_picker_factory_impl.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"

using testing::_;
using testing::AnyNumber;
using testing::ByMove;
using testing::InvokeArgument;
using testing::Ne;
using testing::Return;
using testing::ReturnRef;
using testing::WithArg;

namespace {

DesktopMediaList::WebContentsFilter GetDefaultFilter() {
  return base::BindRepeating(
      [](content::WebContents* web_contents) { return true; });
}

}  // namespace

class MockDesktopMediaPicker : public DesktopMediaPicker {
 public:
  MOCK_METHOD3(Show,
               void(const Params& params,
                    std::vector<std::unique_ptr<DesktopMediaList>> source_lists,
                    DoneCallback done_callback));
};

class MockDesktopMediaList : public DesktopMediaList {
 public:
  MOCK_METHOD(void, SetUpdatePeriod, (base::TimeDelta period));
  MOCK_METHOD(void, SetThumbnailSize, (const gfx::Size& thumbnail_size));
  MOCK_METHOD(void, SetViewDialogWindowId, (content::DesktopMediaID dialog_id));
  MOCK_METHOD(void, StartUpdating, (DesktopMediaListObserver * observer));
  MOCK_METHOD(void, Update, (UpdateCallback callback));
  MOCK_METHOD(void,
              SetPreviewedSource,
              (const std::optional<content::DesktopMediaID>& id));
  MOCK_METHOD(int, GetSourceCount, (), (const));
  MOCK_METHOD(Source&, GetSource, (int), (const));
  MOCK_METHOD(DesktopMediaList::Type, GetMediaListType, (), (const));
  MOCK_METHOD(bool, IsSourceListDelegated, (), (const));
  MOCK_METHOD(void, ClearDelegatedSourceListSelection, ());
  MOCK_METHOD(void, FocusList, ());
  MOCK_METHOD(void, HideList, ());
  MOCK_METHOD(void, ShowDelegatedList, ());
};

class MockDesktopMediaPickerFactory : public DesktopMediaPickerFactory {
 public:
  MOCK_METHOD(std::unique_ptr<DesktopMediaPicker>,
              CreatePicker,
              (const content::MediaStreamRequest*),
              (override));
  MOCK_METHOD(std::vector<std::unique_ptr<DesktopMediaList>>,
              CreateMediaList,
              (const std::vector<DesktopMediaList::Type>&,
               content::WebContents*,
               DesktopMediaList::WebContentsFilter));
};

class DesktopMediaPickerControllerTest : public testing::Test {
 public:
  void SetUp() override {
    ON_CALL(factory_, CreatePicker).WillByDefault([this]() {
      return std::unique_ptr<DesktopMediaPicker>(std::move(picker_));
    });
    ON_CALL(factory_, CreateMediaList)
        .WillByDefault([this](const auto& types,
                              content::WebContents* web_contents,
                              DesktopMediaList::WebContentsFilter
                                  includable_web_contents_filter) {
          std::vector<std::unique_ptr<DesktopMediaList>> lists;
          lists.push_back(std::move(media_list_));
          return lists;
        });
  }

 protected:
  DesktopMediaPickerController::Params picker_params_{
      DesktopMediaPickerController::Params::RequestSource::kUnknown};
  base::MockCallback<DesktopMediaPickerController::DoneCallback> done_;
  std::vector<DesktopMediaList::Type> source_types_{
      DesktopMediaList::Type::kScreen};
  content::DesktopMediaID media_id_{content::DesktopMediaID::TYPE_SCREEN, 42};
  std::unique_ptr<MockDesktopMediaPicker> picker_ =
      std::make_unique<MockDesktopMediaPicker>();
  std::unique_ptr<MockDesktopMediaList> media_list_ =
      std::make_unique<MockDesktopMediaList>();
  MockDesktopMediaPickerFactory factory_;
};

// Test that the picker dialog is shown and the selected media ID is returned.
TEST_F(DesktopMediaPickerControllerTest, ShowPicker) {
  auto filter = GetDefaultFilter();
  EXPECT_CALL(factory_, CreatePicker(nullptr));
  EXPECT_CALL(factory_, CreateMediaList(source_types_, nullptr, filter));
  EXPECT_CALL(done_, Run("", media_id_));
  EXPECT_CALL(*picker_, Show)
      .WillOnce(WithArg<2>([&](DesktopMediaPicker::DoneCallback cb) {
        std::move(cb).Run(media_id_);
      }));
  EXPECT_CALL(*media_list_, Update).Times(0);

  DesktopMediaPickerController controller(&factory_);
  controller.Show(picker_params_, source_types_, filter, done_.Get());
}

// Test that a null result is returned in response to WebContentsDestroyed().
TEST_F(DesktopMediaPickerControllerTest, WebContentsDestroyed) {
  auto filter = GetDefaultFilter();
  EXPECT_CALL(factory_, CreatePicker(nullptr));
  EXPECT_CALL(factory_, CreateMediaList(source_types_, nullptr, filter));
  EXPECT_CALL(done_, Run("", content::DesktopMediaID()));
  EXPECT_CALL(*picker_, Show);

  DesktopMediaPickerController controller(&factory_);
  controller.Show(picker_params_, source_types_, filter, done_.Get());
  controller.WebContentsDestroyed();
}

// Test that the picker dialog can be bypassed.
TEST_F(DesktopMediaPickerControllerTest, ShowSingleScreen) {
  auto filter = GetDefaultFilter();
  picker_params_.select_only_screen = true;

  DesktopMediaList::Source source;
  source.id = media_id_;
  source.name = u"fake name";

  EXPECT_CALL(factory_, CreatePicker(nullptr)).Times(0);
  EXPECT_CALL(factory_, CreateMediaList(source_types_, nullptr, filter));
  EXPECT_CALL(done_, Run("", source.id));
  EXPECT_CALL(*picker_, Show).Times(0);
  EXPECT_CALL(*media_list_, Update)
      .WillOnce(
          [](DesktopMediaList::UpdateCallback cb) { std::move(cb).Run(); });
  EXPECT_CALL(*media_list_, GetSourceCount)
      .Times(AnyNumber())
      .WillRepeatedly(Return(1));
  EXPECT_CALL(*media_list_, GetSource(0))
      .Times(AnyNumber())
      .WillRepeatedly(ReturnRef(source));

  DesktopMediaPickerController controller(&factory_);
  controller.Show(picker_params_, source_types_, filter, done_.Get());
}

// Test that an error is reported when no sources are found.
TEST_F(DesktopMediaPickerControllerTest, EmptySourceList) {
  EXPECT_CALL(factory_, CreateMediaList)
      .WillOnce(
          Return(ByMove(std::vector<std::unique_ptr<DesktopMediaList>>())));
  EXPECT_CALL(done_, Run(Ne(""), content::DesktopMediaID()));

  DesktopMediaPickerController controller(&factory_);
  controller.Show(picker_params_, source_types_, GetDefaultFilter(),
                  done_.Get());
}

// Test that an error is reported when no picker can be created.
TEST_F(DesktopMediaPickerControllerTest, NoPicker) {
  EXPECT_CALL(factory_, CreatePicker)
      .WillOnce(Return(ByMove(std::unique_ptr<DesktopMediaPicker>())));
  EXPECT_CALL(done_, Run(Ne(""), content::DesktopMediaID()));
  EXPECT_CALL(factory_, CreateMediaList).Times(AnyNumber());

  DesktopMediaPickerController controller(&factory_);
  controller.Show(picker_params_, source_types_, GetDefaultFilter(),
                  done_.Get());
}