[Offline pages] OPMStoreSQL implementation of Add disabling updates

components/offline_pages/offline_page_metadata_store_impl_unittest.cc

 // Copyright 2015 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/offline_page_metadata_store.h"
 
 #include <stdint.h>
 
 #include <memory>
 
@@ skipping 429 matching lines @@
 
   CheckThatOfflinePageCanBeSaved(std::move(store));
 }
 
 // Adds metadata of an offline page into a store and then opens the store
 // again to make sure that stored metadata survives store restarts.
 TEST_F(OfflinePageMetadataStoreTest, AddOfflinePage) {
   CheckThatOfflinePageCanBeSaved(BuildStore());
 }
 
+TEST_F(OfflinePageMetadataStoreTest, AddSameOfflinePageTwice) {
+  std::unique_ptr<OfflinePageMetadataStore> store(BuildStore());
+
+  OfflinePageItem offline_page(GURL(kTestURL), 1234LL, kTestClientId1,
+                               base::FilePath(kFilePath), kFileSize);
+  offline_page.title = base::UTF8ToUTF16("a title");
+  base::Time expiration_time = base::Time::Now();
+  offline_page.expiration_time = expiration_time;
+
+  store->AddOfflinePage(offline_page,
+                        base::Bind(&OfflinePageMetadataStoreTest::AddCallback,
+                                   base::Unretained(this)));
+  PumpLoop();
+  EXPECT_EQ(ADD, last_called_callback_);
+  EXPECT_EQ(STATUS_TRUE, last_status_);
+  ClearResults();
+
+  store->AddOfflinePage(offline_page,
+                        base::Bind(&OfflinePageMetadataStoreTest::AddCallback,
+                                   base::Unretained(this)));
+  PumpLoop();
+  EXPECT_EQ(ADD, last_called_callback_);
+  EXPECT_EQ(STATUS_FALSE, last_status_);
+}
+
 // Tests removing offline page metadata from the store, for which it first adds
 // metadata of an offline page.
 TEST_F(OfflinePageMetadataStoreTest, RemoveOfflinePage) {
   std::unique_ptr<OfflinePageMetadataStore> store(BuildStore());
 
   // Add an offline page.
   OfflinePageItem offline_page(GURL(kTestURL), 1234LL, kTestClientId1,
                                base::FilePath(kFilePath), kFileSize);
   store->AddOfflinePage(offline_page,
                         base::Bind(&OfflinePageMetadataStoreTest::AddCallback,
@@ skipping 234 matching lines @@
                  base::Unretained(this)));
   PumpLoop();
 
   EXPECT_EQ(LOAD, last_called_callback_);
   EXPECT_EQ(STATUS_TRUE, last_status_);
   ASSERT_EQ(0U, offline_pages_.size());
 }
 
 }  // namespace
 }  // namespace offline_pages