rtc_base/data_rate_limiter_unittest.cc

/*
 *  Copyright 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 "rtc_base/data_rate_limiter.h"

#include "test/gtest.h"

namespace rtc {

TEST(RateLimiterTest, TestCanUse) {
  // Diet: Can eat 2,000 calories per day.
  DataRateLimiter limiter = DataRateLimiter(2000, 1.0);

  double monday = 1.0;
  double tuesday = 2.0;
  double thursday = 4.0;

  EXPECT_TRUE(limiter.CanUse(0, monday));
  EXPECT_TRUE(limiter.CanUse(1000, monday));
  EXPECT_TRUE(limiter.CanUse(1999, monday));
  EXPECT_TRUE(limiter.CanUse(2000, monday));
  EXPECT_FALSE(limiter.CanUse(2001, monday));

  limiter.Use(1000, monday);

  EXPECT_TRUE(limiter.CanUse(0, monday));
  EXPECT_TRUE(limiter.CanUse(999, monday));
  EXPECT_TRUE(limiter.CanUse(1000, monday));
  EXPECT_FALSE(limiter.CanUse(1001, monday));

  limiter.Use(1000, monday);

  EXPECT_TRUE(limiter.CanUse(0, monday));
  EXPECT_FALSE(limiter.CanUse(1, monday));

  EXPECT_TRUE(limiter.CanUse(0, tuesday));
  EXPECT_TRUE(limiter.CanUse(1, tuesday));
  EXPECT_TRUE(limiter.CanUse(1999, tuesday));
  EXPECT_TRUE(limiter.CanUse(2000, tuesday));
  EXPECT_FALSE(limiter.CanUse(2001, tuesday));

  limiter.Use(1000, tuesday);

  EXPECT_TRUE(limiter.CanUse(1000, tuesday));
  EXPECT_FALSE(limiter.CanUse(1001, tuesday));

  limiter.Use(1000, thursday);

  EXPECT_TRUE(limiter.CanUse(1000, tuesday));
  EXPECT_FALSE(limiter.CanUse(1001, tuesday));
}

}  // namespace rtc