Configure synthetic delays through TraceLog

base/debug/trace_event_unittest.cc

 // Copyright (c) 2012 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/debug/trace_event_unittest.h"
 
 #include <cstdlib>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
+#include "base/debug/trace_event_synthetic_delay.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "base/process/process_handle.h"
 #include "base/strings/stringprintf.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread.h"
@@ skipping 2553 matching lines @@
     const DictionaryValue* item;
     EXPECT_TRUE(trace_parsed_.GetDictionary(i, &item));
     double timestamp;
     EXPECT_TRUE(item->GetDouble("ts", &timestamp));
     EXPECT_GE(timestamp, last_timestamp);
     EXPECT_LE(timestamp, end_time);
     last_timestamp = timestamp;
   }
 }
 
+TEST_F(TraceEventTestFixture, ConfigureSyntheticDelays) {
+  BeginSpecificTrace("test.Delay=0.05");
+
+  base::TimeTicks start = base::TimeTicks::Now();
+  {
+    TRACE_EVENT_SYNTHETIC_DELAY("test.Delay");
+  }
+  base::TimeDelta duration = base::TimeTicks::Now() - start;
+  EXPECT_GE(duration.InMilliseconds(), 50);
+
+  EndTraceAndFlush();
+}
+
 }  // namespace debug
 }  // namespace base