MD Downloads: check for removed files on page load

chrome/browser/ui/webui/md_downloads/md_downloads_dom_handler_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 "chrome/browser/ui/webui/md_downloads/md_downloads_dom_handler.h"
+
+#include "chrome/test/base/testing_profile.h"
+#include "content/public/test/mock_download_manager.h"
+#include "content/public/test/test_browser_thread_bundle.h"
+#include "content/public/test/test_web_ui.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+TEST(MdDownloadsDOMHandlerTest, ChecksForRemovedFiles) {
+  content::TestBrowserThreadBundle thread_bundle;
+  TestingProfile profile;
+
+  testing::NiceMock<content::MockDownloadManager> manager;
+  ON_CALL(manager, GetBrowserContext()).WillByDefault(
+      testing::Return(&profile));
+
+  content::TestWebUI web_ui;
+
+  EXPECT_CALL(manager, CheckForHistoryFilesRemoval());
+  MdDownloadsDOMHandler handler(&manager, &web_ui);
+
+  testing::Mock::VerifyAndClear(&manager);
+
+  EXPECT_CALL(manager, CheckForHistoryFilesRemoval());
+  handler.RenderViewReused(nullptr);
+}