Added implementation of three classes in BBR,with unit-tests.

webrtc/modules/remote_bitrate_estimator/test/estimators/max_bandwidth_filter_unittest.cc

Index: webrtc/modules/remote_bitrate_estimator/test/estimators/max_bandwidth_filter_unittest.cc
diff --git a/webrtc/modules/remote_bitrate_estimator/test/estimators/max_bandwidth_filter_unittest.cc b/webrtc/modules/remote_bitrate_estimator/test/estimators/max_bandwidth_filter_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..56b65cff0d86931f6d24c02c7a8421483d51e250
--- /dev/null
+++ b/webrtc/modules/remote_bitrate_estimator/test/estimators/max_bandwidth_filter_unittest.cc
@@ -0,0 +1,68 @@
+/*
+ *  Copyright (c) 2017 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 "webrtc/modules/remote_bitrate_estimator/test/estimators/max_bandwidth_filter.h"
+
+#include "webrtc/test/gtest.h"
+
+namespace webrtc {
+namespace testing {
+namespace bwe {
+TEST(MaxBandwidthFilterTest, InitializationCheck) {
+  MaxBandwidthFilter max_bandwidth_filter;
+  EXPECT_EQ(max_bandwidth_filter.max_bandwidth_estimate(), 0);
+}
+
+TEST(MaxBandwidthFilterTest, AddOneBandwidthSample) {
+  MaxBandwidthFilter max_bandwidth_filter;
+  max_bandwidth_filter.AddBandwidthSample(13, 4, 10);
+  EXPECT_EQ(max_bandwidth_filter.max_bandwidth_estimate(), 13);
+}
+
+TEST(MaxBandwidthFilterTest, AddSeveralBandwidthSamples) {
+  MaxBandwidthFilter max_bandwidth_filter;
+  max_bandwidth_filter.AddBandwidthSample(10, 5, 10);
+  max_bandwidth_filter.AddBandwidthSample(13, 6, 10);
+  EXPECT_EQ(max_bandwidth_filter.max_bandwidth_estimate(), 13);
+}
+
+TEST(MaxBandwidthFilterTest, SampleTimeOut) {
+  MaxBandwidthFilter max_bandwidth_filter;
+  max_bandwidth_filter.AddBandwidthSample(13, 5, 10);
+  max_bandwidth_filter.AddBandwidthSample(10, 15, 10);
+  EXPECT_EQ(max_bandwidth_filter.max_bandwidth_estimate(), 10);
+}
+
+TEST(MaxBandwidthFilterTest, FullBandwidthReached) {
+  MaxBandwidthFilter max_bandwidth_filter;
+  max_bandwidth_filter.AddBandwidthSample(100, 1, 10);
+  EXPECT_EQ(max_bandwidth_filter.FullBandwidthReached(1.25f, 3), false);
+  max_bandwidth_filter.AddBandwidthSample(110, 2, 10);
+  EXPECT_EQ(max_bandwidth_filter.FullBandwidthReached(1.25f, 3), false);
+  max_bandwidth_filter.AddBandwidthSample(120, 3, 10);
+  EXPECT_EQ(max_bandwidth_filter.FullBandwidthReached(1.25f, 3), false);
+  max_bandwidth_filter.AddBandwidthSample(124, 4, 10);
+  EXPECT_EQ(max_bandwidth_filter.FullBandwidthReached(1.25f, 3), true);
+}
+
+TEST(MaxBandwidthFilterTest, FullBandwidthNotReached) {
+  MaxBandwidthFilter max_bandwidth_filter;
+  max_bandwidth_filter.AddBandwidthSample(100, 1, 10);
+  EXPECT_EQ(max_bandwidth_filter.FullBandwidthReached(1.25f, 3), false);
+  max_bandwidth_filter.AddBandwidthSample(110, 2, 10);
+  EXPECT_EQ(max_bandwidth_filter.FullBandwidthReached(1.25f, 3), false);
+  max_bandwidth_filter.AddBandwidthSample(120, 3, 10);
+  EXPECT_EQ(max_bandwidth_filter.FullBandwidthReached(1.25f, 3), false);
+  max_bandwidth_filter.AddBandwidthSample(125, 4, 10);
+  EXPECT_EQ(max_bandwidth_filter.FullBandwidthReached(1.25f, 3), false);
+}
+}  // namespace bwe
+}  // namespace testing
+}  // namespace webrtc