Add a unittest that DeleteAll(CookieMonster*) does flush

net/cookies/cookie_monster_unittest.cc

 // Copyright (c) 2012 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 "net/cookies/cookie_store_unittest.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 2293 matching lines @@
   EXPECT_TRUE(IsCookieInList(cookie6_with_new_path, cookies_to_add));
   EXPECT_FALSE(IsCookieInList(cookie6_with_new_path, cookies_to_delete));
 
   // |cookie7| is kept and |cookie7_with_new_path| is added as a new cookie.
   EXPECT_FALSE(IsCookieInList(cookie7, cookies_to_add));
   EXPECT_FALSE(IsCookieInList(cookie7, cookies_to_delete));
   EXPECT_TRUE(IsCookieInList(cookie7_with_new_path, cookies_to_add));
   EXPECT_FALSE(IsCookieInList(cookie7_with_new_path, cookies_to_delete));
 }
 
+// Check that DeleteAll does flush (as a sanity check that flush_count()
+// works).
+TEST_F(CookieMonsterTest, DeleteAll) {
+  scoped_refptr<FlushablePersistentStore> store(new FlushablePersistentStore());
+  scoped_refptr<CookieMonster> cm(new CookieMonster(store.get(), NULL));
+  cm->SetPersistSessionCookies(true);
+
+  EXPECT_TRUE(SetCookie(cm.get(), url_google_, "X=Y; path=/"));
+
+  ASSERT_EQ(0, store->flush_count());
+  EXPECT_EQ(1, DeleteAll(cm.get()));
+  EXPECT_EQ(1, store->flush_count());
+}
+
 TEST_F(CookieMonsterTest, HistogramCheck) {
   scoped_refptr<CookieMonster> cm(new CookieMonster(NULL, NULL));
   // Should match call in InitializeHistograms, but doesn't really matter
   // since the histogram should have been initialized by the CM construction
   // above.
   base::HistogramBase* expired_histogram = base::Histogram::FactoryGet(
       "Cookie.ExpirationDurationMinutes", 1, 10 * 365 * 24 * 60, 50,
       base::Histogram::kUmaTargetedHistogramFlag);
 
   scoped_ptr<base::HistogramSamples> samples1(
@@ skipping 624 matching lines @@
       monster()->AddCallbackForCookie(
           test_url_, "abc",
           base::Bind(&RecordCookieChanges, &cookies1, nullptr)));
   SetCookie(monster(), test_url_, "abc=def");
   base::MessageLoop::current()->RunUntilIdle();
   EXPECT_EQ(1U, cookies0.size());
   EXPECT_EQ(1U, cookies0.size());
 }
 
 }  // namespace net