Add support for OfflinePagesDownloadBridge.

components/offline_pages/downloads/download_ui_adapter_unittest.cc

+// Copyright 2016 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 "components/offline_pages/downloads/download_ui_adapter.h"
+
+#include "base/bind.h"
+#include "base/run_loop.h"
+#include "base/single_thread_task_runner.h"
+#include "base/test/test_mock_time_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "base/time/time.h"
+#include "components/offline_pages/stub_offline_page_model.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace offline_pages {
+
+class DownloadUIAdapterTest
+    : public testing::Test,
+      public DownloadUIAdapter::Observer {
+ public:
+  DownloadUIAdapterTest();
+  ~DownloadUIAdapterTest() override;
+
+  DownloadUIAdapter* adapter() { return adapter_.get(); }
+
+  // testing::Test
+  void SetUp() override;
+  void TearDown() override;
+
+  // DownloadUIAdapter::Observer
+  void ItemsLoaded() override;
+  void ItemAdded(const DownloadUIItem& item) override;
+  void ItemUpdated(const DownloadUIItem& item) override;
+  void ItemDeleted(std::string guid) override;
+
+  // Runs until all of the tasks that are not delayed are gone from the task
+  // queue.
+  void PumpLoop();
+
+  bool items_loaded;
+
+ private:
+  std::unique_ptr<DownloadUIAdapter> adapter_;
+  scoped_refptr<base::TestMockTimeTaskRunner> task_runner_;
+};
+
+DownloadUIAdapterTest::DownloadUIAdapterTest()
+    : items_loaded(false),
+      task_runner_(new base::TestMockTimeTaskRunner) {
+}
+
+DownloadUIAdapterTest::~DownloadUIAdapterTest() {
+}
+
+void DownloadUIAdapterTest::SetUp() {
+  adapter_.reset(new DownloadUIAdapter(new StubOfflinePageModel()));
+}
+
+void DownloadUIAdapterTest::TearDown() {
+}
+
+void DownloadUIAdapterTest::ItemsLoaded() {
+  items_loaded = true;
+}
+void DownloadUIAdapterTest::ItemAdded(const DownloadUIItem& item) {}
+void DownloadUIAdapterTest::ItemUpdated(const DownloadUIItem& item) {}
+void DownloadUIAdapterTest::ItemDeleted(std::string guid) {}
+
+void DownloadUIAdapterTest::PumpLoop() {
+  task_runner_->RunUntilIdle();
+}
+
+TEST_F(DownloadUIAdapterTest, TrivialLoad) {
+  // Onload should make snapshot right away.
+  EXPECT_FALSE(items_loaded);
+  PumpLoop();
+  EXPECT_TRUE(items_loaded);
+}
+
+}  // namespace offline_pages