Index: base/metrics/histogram_base_unittest.cc |
diff --git a/base/metrics/histogram_base_unittest.cc b/base/metrics/histogram_base_unittest.cc |
index 4944f31790ba35dda3cbebeded439635027a6858..0e19d56f4c1ad5e8f748c9c70eeab66e5eba7376 100644 |
--- a/base/metrics/histogram_base_unittest.cc |
+++ b/base/metrics/histogram_base_unittest.cc |
@@ -167,6 +167,25 @@ TEST_F(HistogramBaseTest, DeserializeCustomHistogram) { |
EXPECT_EQ(0, deserialized->flags()); |
} |
-// TODO(kaiwang): Add SparseHistogram test. |
+TEST_F(HistogramBaseTest, DeserializeSparseHistogram) { |
+ HistogramBase* histogram = SparseHistogram::FactoryGet( |
+ "TestHistogram", HistogramBase::kIPCSerializationSourceFlag); |
+ |
+ Pickle pickle; |
+ ASSERT_TRUE(histogram->SerializeInfo(&pickle)); |
+ |
+ PickleIterator iter(pickle); |
+ HistogramBase* deserialized = DeserializeHistogramInfo(&iter); |
+ EXPECT_EQ(histogram, deserialized); |
+ |
+ ResetStatisticsRecorder(); |
+ |
+ PickleIterator iter2(pickle); |
+ deserialized = DeserializeHistogramInfo(&iter2); |
+ EXPECT_TRUE(deserialized); |
+ EXPECT_NE(histogram, deserialized); |
+ EXPECT_EQ("TestHistogram", deserialized->histogram_name()); |
+ EXPECT_EQ(0, deserialized->flags()); |
+} |
} // namespace base |