Index: base/test/histogram_recorder_unittest.cc |
diff --git a/base/test/histogram_recorder_unittest.cc b/base/test/histogram_recorder_unittest.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..f4cdf499e52bf6a1172cfcfb589f57a9c1700ba9 |
--- /dev/null |
+++ b/base/test/histogram_recorder_unittest.cc |
@@ -0,0 +1,41 @@ |
+// Copyright 2013 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 "base/memory/scoped_ptr.h" |
+#include "base/metrics/histogram.h" |
+#include "base/metrics/histogram_samples.h" |
+#include "base/test/histogram_recorder.h" |
+#include "testing/gtest/include/gtest/gtest.h" |
+ |
+namespace base { |
+ |
+class HistogramRecorderTest : public testing::Test { |
+ public: |
+ static void SetUpTestCase() { |
+ HistogramRecorder::Initialize(); |
+ } |
ppi
2013/12/23 16:37:48
I'm afraid we have to follow suit of existing unit
lpromero
2013/12/23 17:22:54
Done.
|
+}; |
+ |
+TEST_F(HistogramRecorderTest, Scope) { |
+ // Record a histogram before the creation of the recorder. |
+ UMA_HISTOGRAM_BOOLEAN("Test", true); |
+ |
+ HistogramRecorder recorder; |
+ |
+ // Verify that no histogram is recorded. |
+ scoped_ptr<HistogramSamples> samples( |
+ recorder.GetHistogramSamplesSinceCreation("Test")); |
+ EXPECT_TRUE(samples); |
+ EXPECT_EQ(0, samples->TotalCount()); |
+ |
+ // Record a histogram after the creation of the recorder. |
+ UMA_HISTOGRAM_BOOLEAN("Test", true); |
+ |
+ // Verify that one histogram is recorded. |
+ samples = recorder.GetHistogramSamplesSinceCreation("Test"); |
+ EXPECT_TRUE(samples); |
+ EXPECT_EQ(1, samples->TotalCount()); |
+} |
+ |
+} // namespace base |