Adds trunk/talk folder of revision 359 from libjingles google code to

trunk/talk


git-svn-id: http://webrtc.googlecode.com/svn/trunk@4318 4adac7df-926f-26a2-2b94-8c16560cd09d

talk/base/ratetracker_unittest.cc

@@ -0,0 +1,91 @@
+/*
+ * libjingle
+ * Copyright 2010, Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright notice,
+ *     this list of conditions and the following disclaimer in the documentation
+ *     and/or other materials provided with the distribution.
+ *  3. The name of the author may not be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "talk/base/gunit.h"
+#include "talk/base/ratetracker.h"
+
+namespace talk_base {
+
+class RateTrackerForTest : public RateTracker {
+ public:
+  RateTrackerForTest() : time_(0) {}
+  virtual uint32 Time() const { return time_; }
+  void AdvanceTime(uint32 delta) { time_ += delta; }
+
+ private:
+  uint32 time_;
+};
+
+TEST(RateTrackerTest, TestBasics) {
+  RateTrackerForTest tracker;
+  EXPECT_EQ(0U, tracker.total_units());
+  EXPECT_EQ(0U, tracker.units_second());
+
+  // Add a sample.
+  tracker.Update(1234);
+  // Advance the clock by 100 ms.
+  tracker.AdvanceTime(100);
+  // total_units should advance, but units_second should stay 0.
+  EXPECT_EQ(1234U, tracker.total_units());
+  EXPECT_EQ(0U, tracker.units_second());
+
+  // Repeat.
+  tracker.Update(1234);
+  tracker.AdvanceTime(100);
+  EXPECT_EQ(1234U * 2, tracker.total_units());
+  EXPECT_EQ(0U, tracker.units_second());
+
+  // Advance the clock by 800 ms, so we've elapsed a full second.
+  // units_second should now be filled in properly.
+  tracker.AdvanceTime(800);
+  EXPECT_EQ(1234U * 2, tracker.total_units());
+  EXPECT_EQ(1234U * 2, tracker.units_second());
+
+  // Poll the tracker again immediately. The reported rate should stay the same.
+  EXPECT_EQ(1234U * 2, tracker.total_units());
+  EXPECT_EQ(1234U * 2, tracker.units_second());
+
+  // Do nothing and advance by a second. We should drop down to zero.
+  tracker.AdvanceTime(1000);
+  EXPECT_EQ(1234U * 2, tracker.total_units());
+  EXPECT_EQ(0U, tracker.units_second());
+
+  // Send a bunch of data at a constant rate for 5.5 "seconds".
+  // We should report the rate properly.
+  for (int i = 0; i < 5500; i += 100) {
+    tracker.Update(9876U);
+    tracker.AdvanceTime(100);
+  }
+  EXPECT_EQ(9876U * 10, tracker.units_second());
+
+  // Advance the clock by 500 ms. Since we sent nothing over this half-second,
+  // the reported rate should be reduced by half.
+  tracker.AdvanceTime(500);
+  EXPECT_EQ(9876U * 5, tracker.units_second());
+}
+
+}  // namespace talk_base