Send TranslateEventProtos to UMA.

components/translate/core/browser/translate_ranker_unittest.cc

Index: components/translate/core/browser/translate_ranker_unittest.cc
diff --git a/components/translate/core/browser/translate_ranker_unittest.cc b/components/translate/core/browser/translate_ranker_unittest.cc
index 8c1f1b2927efaa7b83abf530d22dc31cd4656b77..23a7fac0f272f9984ff6730caa335bf285e3137e 100644
--- a/components/translate/core/browser/translate_ranker_unittest.cc
+++ b/components/translate/core/browser/translate_ranker_unittest.cc
@@ -10,6 +10,7 @@
 #include "base/feature_list.h"
 #include "base/strings/stringprintf.h"
 #include "base/test/scoped_feature_list.h"
+#include "components/metrics/proto/translate_event.pb.h"
 #include "components/pref_registry/testing_pref_service_syncable.h"
 #include "components/prefs/scoped_user_pref_update.h"
 #include "components/translate/core/browser/proto/translate_ranker_model.pb.h"
@@ -80,6 +81,21 @@ class TranslateRankerTest : public ::testing::Test {
 
   static double Sigmoid(double x) { return 1.0 / (1.0 + exp(-x)); }
 
+  static metrics::TranslateEventProto CreateTranslateEvent(
+      const std::string& src_lang,
+      const std::string& dst_lang,
+      int accept_count,
+      int decline_count,
+      int ignore_count) {
+    metrics::TranslateEventProto translate_event;
+    translate_event.set_source_language(src_lang);
+    translate_event.set_target_language(dst_lang);
+    translate_event.set_accept_count(accept_count);
+    translate_event.set_decline_count(decline_count);
+    translate_event.set_ignore_count(ignore_count);
+    return translate_event;
+  }
+
   static const char* const kPreferredLanguagePrefs;
 
   std::unique_ptr<user_prefs::TestingPrefServiceSyncable> prefs_;
@@ -156,4 +172,33 @@ TEST_F(TranslateRankerTest, ShouldOfferTranslation) {
                                                               "en", "fr"));
 }
 
+TEST_F(TranslateRankerTest, RecordAndFlushEvents) {
+  InitFeatures({kTranslateRankerQuery, kTranslateRankerEnforcement}, {});
+  std::unique_ptr<translate::TranslateRanker> ranker = GetRankerForTest(0.0f);
+  std::vector<metrics::TranslateEventProto> flushed_events;
+
+  // Check that flushing an empty cache will return an empty vector.
+  ranker->FlushTranslateEvents(&flushed_events);
+  EXPECT_EQ(0U, flushed_events.size());
+
+  auto event_1 = CreateTranslateEvent("fr", "en", 1, 0, 3);
+  auto event_2 = CreateTranslateEvent("jp", "en", 2, 0, 3);
+  auto event_3 = CreateTranslateEvent("es", "de", 4, 5, 6);
+  ranker->RecordTranslateEvent(event_1);
+  ranker->RecordTranslateEvent(event_2);
+  ranker->RecordTranslateEvent(event_3);
+
+  // Capture the data and verify that it is as expected.
+  ranker->FlushTranslateEvents(&flushed_events);
+  EXPECT_EQ(3U, flushed_events.size());
+  ASSERT_EQ("fr", flushed_events[0].source_language());
+  ASSERT_EQ("jp", flushed_events[1].source_language());
+  ASSERT_EQ("es", flushed_events[2].source_language());
+
+  // Check that the cache has been cleared.
+  ranker->FlushTranslateEvents(&flushed_events);
+  EXPECT_EQ(0U, flushed_events.size());
+}
+

[Alexei Svitkine (slow), 2016/10/12 15:21:58]

Nit: Remove extra empty line.

[hamelphi, 2016/10/12 16:17:21]

Done.

+
 }  // namespace translate