Add a full end-to-end test for Background Fetch

content/browser/background_fetch/background_fetch_embedded_worker_test_helper.h

 // Copyright 2017 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.
 
 #ifndef CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_EMBEDDED_WORKER_TEST_HELPER_H_
 #define CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_EMBEDDED_WORKER_TEST_HELPER_H_
 
 #include <string>
 #include <vector>
 
+#include "base/callback.h"
 #include "base/macros.h"
 #include "base/optional.h"
 #include "content/browser/service_worker/embedded_worker_test_helper.h"
 
 namespace content {
 
 struct BackgroundFetchSettledFetch;
 
 namespace mojom {
 enum class BackgroundFetchState;
 }
 
 // Extension of the EmbeddedWorkerTestHelper that enables instrumentation of the
 // events related to the Background Fetch API. Storage for these tests will
 // always be kept in memory, as data persistence is tested elsewhere.
 class BackgroundFetchEmbeddedWorkerTestHelper
     : public EmbeddedWorkerTestHelper {
  public:
   BackgroundFetchEmbeddedWorkerTestHelper();
   ~BackgroundFetchEmbeddedWorkerTestHelper() override;
 
   // Toggles whether the named Service Worker event should fail.
   void set_fail_abort_event(bool fail) { fail_abort_event_ = fail; }
   void set_fail_click_event(bool fail) { fail_click_event_ = fail; }
   void set_fail_fetch_fail_event(bool fail) { fail_fetch_fail_event_ = fail; }
   void set_fail_fetched_event(bool fail) { fail_fetched_event_ = fail; }
 
+  // Sets a base::Callback that should be executed when the named event is ran.
+  void set_abort_event_closure(const base::Closure& closure) {
+    abort_event_closure_ = closure;
+  }
+  void set_click_event_closure(const base::Closure& closure) {
+    click_event_closure_ = closure;
+  }
+  void set_fetch_fail_event_closure(const base::Closure& closure) {
+    fetch_fail_event_closure_ = closure;
+  }
+  void set_fetched_event_closure(const base::Closure& closure) {
+    fetched_event_closure_ = closure;
+  }
+
   const base::Optional<std::string>& last_tag() const { return last_tag_; }
   const base::Optional<mojom::BackgroundFetchState>& last_state() const {
     return last_state_;
   }
   const base::Optional<std::vector<BackgroundFetchSettledFetch>> last_fetches()
       const {
     return last_fetches_;
   }
 
  protected:
@@ skipping 17 matching lines @@
       const std::vector<BackgroundFetchSettledFetch>& fetches,
       const mojom::ServiceWorkerEventDispatcher::
           DispatchBackgroundFetchedEventCallback& callback) override;
 
  private:
   bool fail_abort_event_ = false;
   bool fail_click_event_ = false;
   bool fail_fetch_fail_event_ = false;
   bool fail_fetched_event_ = false;
 
+  base::Closure abort_event_closure_;
+  base::Closure click_event_closure_;
+  base::Closure fetch_fail_event_closure_;
+  base::Closure fetched_event_closure_;
+
   base::Optional<std::string> last_tag_;
   base::Optional<mojom::BackgroundFetchState> last_state_;
   base::Optional<std::vector<BackgroundFetchSettledFetch>> last_fetches_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundFetchEmbeddedWorkerTestHelper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_EMBEDDED_WORKER_TEST_HELPER_H_