[NTP Snippets] FetchMore backend

components/ntp_snippets/content_suggestions_service_unittest.cc

Index: components/ntp_snippets/content_suggestions_service_unittest.cc
diff --git a/components/ntp_snippets/content_suggestions_service_unittest.cc b/components/ntp_snippets/content_suggestions_service_unittest.cc
index 99d7a3fd0259b478e397167124398b0371f48247..dd14b8bd6b7d398b06ace43278868f1e9ac7a4ba 100644
--- a/components/ntp_snippets/content_suggestions_service_unittest.cc
+++ b/components/ntp_snippets/content_suggestions_service_unittest.cc
@@ -88,6 +88,7 @@ class MockProvider : public ContentSuggestionsProvider {
                void(base::Time begin,
                     base::Time end,
                     const base::Callback<bool(const GURL& url)>& filter));
+  MOCK_METHOD2(FetchMore, void(const Category&, FetchedMoreCallback));
   MOCK_METHOD1(ClearCachedSuggestions, void(Category category));
   MOCK_METHOD2(GetDismissedSuggestionsForDebugging,
                void(Category category,
@@ -575,6 +576,15 @@ TEST_F(ContentSuggestionsServiceTest, ShouldForwardClearHistory) {
   service()->ClearHistory(begin, end, filter);
 }
 
+TEST_F(ContentSuggestionsServiceTest, ShouldForwardFetchMore) {
+  Category category = FromKnownCategory(KnownCategories::ARTICLES);
+  MockProvider* provider = RegisterProvider(category);
+  provider->FireCategoryStatusChangedWithCurrentStatus(category);
+  EXPECT_CALL(*provider, FetchMore(category, _));
+  service()->FetchMore(category,
+                       ContentSuggestionsService::FetchedMoreCallback());
+}
+
 TEST_F(ContentSuggestionsServiceTest, DismissAndRestoreCategory) {
   // Register a category with one suggestion.
   Category category = FromKnownCategory(KnownCategories::ARTICLES);