1 files changed, 57 insertions, 0 deletions
diff --git a/src/system_wrappers/source/trace_unittest.cc b/src/system_wrappers/source/trace_unittest.cc
new file mode 100644
index 0000000000..982e715726
--- /dev/null
+++ b/src/system_wrappers/source/trace_unittest.cc
@@ -0,0 +1,57 @@
+/*
+ *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "system_wrappers/interface/trace.h"
+
+#include "gtest/gtest.h"
+#include "system_wrappers/source/cpu_measurement_harness.h"
+#include "testsupport/fileutils.h"
+
+using webrtc::CpuMeasurementHarness;
+using webrtc::Trace;
+using webrtc::kTraceWarning;
+using webrtc::kTraceUtility;
+
+class Logger : public webrtc::CpuTarget {
+ public:
+  Logger() {
+    Trace::CreateTrace();
+    std::string trace_file = webrtc::test::OutputPath() +
+        "trace_unittest.txt";
+    Trace::SetTraceFile(trace_file.c_str());
+    Trace::SetLevelFilter(webrtc::kTraceAll);
+  }
+  virtual ~Logger() {
+    Trace::ReturnTrace();
+  }
+
+  virtual bool DoWork() {
+    // Use input paremeters to WEBRTC_TRACE that are not likely to be removed
+    // in future code. E.g. warnings will likely be kept and this file is in
+    // utility so it should use kTraceUtility.
+    WEBRTC_TRACE(kTraceWarning, kTraceUtility, 0, "Log line");
+    return true;
+  }
+};
+
+// This test is disabled because it measures CPU usage. This is flaky because
+// the CPU usage for a machine may spike due to OS or other application.
+TEST(TraceTest, DISABLED_CpuUsage) {
+  Logger logger;
+  const int periodicity_ms = 1;
+  const int iterations_per_period = 10;
+  const int duration_ms = 1000;
+  CpuMeasurementHarness* cpu_harness =
+      CpuMeasurementHarness::Create(&logger, periodicity_ms,
+                                    iterations_per_period, duration_ms);
+  cpu_harness->Run();
+  const int average_cpu = cpu_harness->AverageCpu();
+  EXPECT_GE(5, average_cpu);
+}