Add PrefStore::GetValues

components/prefs/overlay_user_pref_store_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 "components/prefs/overlay_user_pref_store.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
 #include "components/prefs/pref_store_observer_mock.h"
 #include "components/prefs/testing_pref_store.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::Mock;
 using ::testing::StrEq;
 
 namespace base {
 namespace {
 
 const char kBrowserWindowPlacement[] = "browser.window_placement";
 const char kShowBookmarkBar[] = "bookmark_bar.show_on_all_tabs";
+const char kSharedKey[] = "sync_promo.show_on_first_run_allowed";
 
 const char* const overlay_key = kBrowserWindowPlacement;
 const char* const regular_key = kShowBookmarkBar;
+const char* const shared_key = kSharedKey;
 // With the removal of the kWebKitGlobalXXX prefs, we'll no longer have real
 // prefs using the overlay pref store, so make up keys here.
 const char mapped_overlay_key[] = "test.per_tab.javascript_enabled";
 const char mapped_underlay_key[] = "test.per_profile.javascript_enabled";
 
 }  // namespace
 
 class OverlayUserPrefStoreTest : public testing::Test {
  protected:
   OverlayUserPrefStoreTest()
       : underlay_(new TestingPrefStore()),
         overlay_(new OverlayUserPrefStore(underlay_.get())) {
     overlay_->RegisterOverlayPref(overlay_key);
+    overlay_->RegisterOverlayPref(shared_key);
     overlay_->RegisterOverlayPref(mapped_overlay_key, mapped_underlay_key);
   }
 
   ~OverlayUserPrefStoreTest() override {}
 
   scoped_refptr<TestingPrefStore> underlay_;
   scoped_refptr<OverlayUserPrefStore> overlay_;
 };
 
 TEST_F(OverlayUserPrefStoreTest, Observer) {
@@ skipping 254 matching lines @@
   // Check that an overlay preference is returned.
   EXPECT_TRUE(overlay_->GetValue(overlay_key, &value));
   EXPECT_TRUE(base::FundamentalValue(43).Equals(value));
   overlay_->ClearMutableValues();
 
   // Check that an underlay preference is returned.
   EXPECT_TRUE(overlay_->GetValue(overlay_key, &value));
   EXPECT_TRUE(base::FundamentalValue(42).Equals(value));
 }
 
+TEST_F(OverlayUserPrefStoreTest, GetValues) {
+  // To check merge behavior, create underlay and overlay so each has a key the

[Sam McNally, 2017/02/21 01:58:25]

Can you test with mapped_overlay_key and mapped_underlay_key?

[tibell, 2017/02/21 02:11:07]

Done.

+  // other doesn't have and they have one key in common.
+  underlay_->SetValue(regular_key, base::WrapUnique(new FundamentalValue(42)),
+                      WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
+  overlay_->SetValue(overlay_key, base::WrapUnique(new FundamentalValue(43)),
+                     WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
+  underlay_->SetValue(shared_key, base::WrapUnique(new FundamentalValue(42)),
+                      WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
+  overlay_->SetValue(shared_key, base::WrapUnique(new FundamentalValue(43)),
+                     WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
+
+  auto values = overlay_->GetValues();
+  const Value* value = nullptr;
+  // Check that an overlay preference is returned.
+  ASSERT_TRUE(values->Get(overlay_key, &value));
+  EXPECT_TRUE(base::FundamentalValue(43).Equals(value));
+
+  // Check that an underlay preference is returned.
+  ASSERT_TRUE(values->Get(regular_key, &value));
+  EXPECT_TRUE(base::FundamentalValue(42).Equals(value));
+
+  // Check that the overlay is preferred.
+  ASSERT_TRUE(values->Get(shared_key, &value));
+  EXPECT_TRUE(base::FundamentalValue(43).Equals(value));
+}
+
 }  // namespace base