Add the WebRTC.webkitApiCountPerSession metric.

content/renderer/media/webrtc_uma_histograms_unittest.cc

Index: content/renderer/media/webrtc_uma_histograms_unittest.cc
diff --git a/content/renderer/media/webrtc_uma_histograms_unittest.cc b/content/renderer/media/webrtc_uma_histograms_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7d3a9199fcb2fac9b5156aefe1b284e069ef508c
--- /dev/null
+++ b/content/renderer/media/webrtc_uma_histograms_unittest.cc
@@ -0,0 +1,66 @@
+// Copyright 2014 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 "content/renderer/media/webrtc_uma_histograms.h"
+
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using ::testing::_;
+
+namespace content {
+
+class MockPerSessionWebRTCAPIMetrics : public PerSessionWebRTCAPIMetrics {
+ public:
+  MockPerSessionWebRTCAPIMetrics() {}
+
+  using PerSessionWebRTCAPIMetrics::LogUsageOnlyOnce;
+
+  MOCK_METHOD1(LogUsage, void(JavaScriptAPIName));
+};
+
+TEST(PerSessionWebRTCAPIMetrics, NoCallOngoingGetUserMedia) {
+  MockPerSessionWebRTCAPIMetrics metrics;
+  EXPECT_CALL(metrics, LogUsage(_)).Times(1);
+  metrics.LogUsageOnlyOnce(WEBKIT_GET_USER_MEDIA);
+}
+
+TEST(PerSessionWebRTCAPIMetrics, CallOngoingGetUserMedia) {
+  MockPerSessionWebRTCAPIMetrics metrics;
+  metrics.IncrementStreamCounter();
+  EXPECT_CALL(metrics, LogUsage(WEBKIT_GET_USER_MEDIA)).Times(1);
+  metrics.LogUsageOnlyOnce(WEBKIT_GET_USER_MEDIA);
+}
+
+TEST(PerSessionWebRTCAPIMetrics, NoCallOngoingRTCPeerConnection) {
+  MockPerSessionWebRTCAPIMetrics metrics;
+  EXPECT_CALL(metrics, LogUsage(WEBKIT_RTC_PEER_CONNECTION));
+  metrics.LogUsageOnlyOnce(WEBKIT_RTC_PEER_CONNECTION);
+}
+
+TEST(PerSessionWebRTCAPIMetrics, NoCallOngoingMultiplePC) {
+  MockPerSessionWebRTCAPIMetrics metrics;
+  EXPECT_CALL(metrics, LogUsage(WEBKIT_RTC_PEER_CONNECTION)).Times(1);
+  metrics.LogUsageOnlyOnce(WEBKIT_RTC_PEER_CONNECTION);
+  metrics.LogUsageOnlyOnce(WEBKIT_RTC_PEER_CONNECTION);
+  metrics.LogUsageOnlyOnce(WEBKIT_RTC_PEER_CONNECTION);
+}
+
+TEST(PerSessionWebRTCAPIMetrics, BeforeAfterCallMultiplePC) {
+  MockPerSessionWebRTCAPIMetrics metrics;
+  EXPECT_CALL(metrics, LogUsage(WEBKIT_RTC_PEER_CONNECTION)).Times(1);
+  metrics.LogUsageOnlyOnce(WEBKIT_RTC_PEER_CONNECTION);
+  metrics.LogUsageOnlyOnce(WEBKIT_RTC_PEER_CONNECTION);
+  metrics.IncrementStreamCounter();
+  metrics.IncrementStreamCounter();
+  metrics.LogUsageOnlyOnce(WEBKIT_RTC_PEER_CONNECTION);
+  metrics.DecrementStreamCounter();
+  metrics.LogUsageOnlyOnce(WEBKIT_RTC_PEER_CONNECTION);
+  metrics.DecrementStreamCounter();
+  EXPECT_CALL(metrics, LogUsage(WEBKIT_RTC_PEER_CONNECTION)).Times(1);
+  metrics.LogUsageOnlyOnce(WEBKIT_RTC_PEER_CONNECTION);
+  metrics.LogUsageOnlyOnce(WEBKIT_RTC_PEER_CONNECTION);
+}
+
+}  // namespace content