1 files changed, 139 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/experiments/quality_rampup_experiment_unittest.cc b/third_party/libwebrtc/rtc_base/experiments/quality_rampup_experiment_unittest.cc
new file mode 100644
index 0000000000..b0ede34791
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/experiments/quality_rampup_experiment_unittest.cc
@@ -0,0 +1,139 @@
+/*
+ *  Copyright 2019 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/experiments/quality_rampup_experiment.h"
+
+#include "test/field_trial.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace {
+
+class QualityRampupExperimentTest : public ::testing::Test {
+ protected:
+  int64_t NowMs() const { return current_ms_; }
+  int64_t AdvanceMs(int64_t delta_ms) {
+    current_ms_ += delta_ms;
+    return current_ms_;
+  }
+  int64_t current_ms_ = 2345;
+};
+
+TEST_F(QualityRampupExperimentTest, ValuesNotSetByDefault) {
+  const auto settings = QualityRampupExperiment::ParseSettings();
+  EXPECT_FALSE(settings.MinPixels());
+  EXPECT_FALSE(settings.MinDurationMs());
+  EXPECT_FALSE(settings.MaxBitrateFactor());
+}
+
+TEST_F(QualityRampupExperimentTest, ParseMinPixels) {
+  test::ScopedFieldTrials field_trials(
+      "WebRTC-Video-QualityRampupSettings/min_pixels:10000/");
+  EXPECT_EQ(10000, QualityRampupExperiment::ParseSettings().MinPixels());
+}
+
+TEST_F(QualityRampupExperimentTest, ParseMinDuration) {
+  test::ScopedFieldTrials field_trials(
+      "WebRTC-Video-QualityRampupSettings/min_duration_ms:987/");
+  EXPECT_EQ(987, QualityRampupExperiment::ParseSettings().MinDurationMs());
+}
+
+TEST_F(QualityRampupExperimentTest, ParseMaxBitrateFactor) {
+  test::ScopedFieldTrials field_trials(
+      "WebRTC-Video-QualityRampupSettings/max_bitrate_factor:1.23/");
+  EXPECT_EQ(1.23, QualityRampupExperiment::ParseSettings().MaxBitrateFactor());
+}
+
+TEST_F(QualityRampupExperimentTest, ReportsBwHighWhenDurationPassed) {
+  test::ScopedFieldTrials field_trials(
+      "WebRTC-Video-QualityRampupSettings/"
+      "min_pixels:10000,min_duration_ms:2000/");
+  auto exp = QualityRampupExperiment::ParseSettings();
+  EXPECT_EQ(10000, exp.MinPixels());
+  EXPECT_EQ(2000, exp.MinDurationMs());
+
+  const uint32_t kMaxKbps = 800;
+  exp.SetMaxBitrate(/*pixels*/ 10000, kMaxKbps);
+
+  const uint32_t kAvailableKbps = kMaxKbps;
+  EXPECT_FALSE(exp.BwHigh(NowMs(), kAvailableKbps));
+  EXPECT_FALSE(exp.BwHigh(AdvanceMs(2000 - 1), kAvailableKbps));
+  EXPECT_TRUE(exp.BwHigh(AdvanceMs(1), kAvailableKbps));
+}
+
+TEST_F(QualityRampupExperimentTest, UsesMaxSetBitrate) {
+  test::ScopedFieldTrials field_trials(
+      "WebRTC-Video-QualityRampupSettings/"
+      "min_pixels:10000,min_duration_ms:2000/");
+  auto exp = QualityRampupExperiment::ParseSettings();
+
+  const uint32_t kMaxKbps = 800;
+  exp.SetMaxBitrate(/*pixels*/ 10000, kMaxKbps);
+  exp.SetMaxBitrate(/*pixels*/ 10000, kMaxKbps - 1);
+
+  EXPECT_FALSE(exp.BwHigh(NowMs(), kMaxKbps - 1));
+  EXPECT_FALSE(exp.BwHigh(AdvanceMs(2000), kMaxKbps - 1));
+  EXPECT_FALSE(exp.BwHigh(AdvanceMs(1), kMaxKbps));
+  EXPECT_TRUE(exp.BwHigh(AdvanceMs(2000), kMaxKbps));
+}
+
+TEST_F(QualityRampupExperimentTest, DoesNotReportBwHighIfBelowMinPixels) {
+  test::ScopedFieldTrials field_trials(
+      "WebRTC-Video-QualityRampupSettings/"
+      "min_pixels:10000,min_duration_ms:2000/");
+  auto exp = QualityRampupExperiment::ParseSettings();
+
+  const uint32_t kMaxKbps = 800;
+  exp.SetMaxBitrate(/*pixels*/ 9999, kMaxKbps);
+
+  const uint32_t kAvailableKbps = kMaxKbps;
+  EXPECT_FALSE(exp.BwHigh(NowMs(), kAvailableKbps));
+  EXPECT_FALSE(exp.BwHigh(AdvanceMs(2000), kAvailableKbps));
+}
+
+TEST_F(QualityRampupExperimentTest, ReportsBwHighWithMaxBitrateFactor) {
+  test::ScopedFieldTrials field_trials(
+      "WebRTC-Video-QualityRampupSettings/"
+      "min_pixels:10000,min_duration_ms:2000,max_bitrate_factor:1.5/");
+  auto exp = QualityRampupExperiment::ParseSettings();
+  EXPECT_EQ(10000, exp.MinPixels());
+  EXPECT_EQ(2000, exp.MinDurationMs());
+  EXPECT_EQ(1.5, exp.MaxBitrateFactor());
+
+  const uint32_t kMaxKbps = 800;
+  exp.SetMaxBitrate(/*pixels*/ 10000, kMaxKbps);
+
+  const uint32_t kAvailableKbps = kMaxKbps * 1.5;
+  EXPECT_FALSE(exp.BwHigh(NowMs(), kAvailableKbps - 1));
+  EXPECT_FALSE(exp.BwHigh(AdvanceMs(2000), kAvailableKbps - 1));
+  EXPECT_FALSE(exp.BwHigh(AdvanceMs(1), kAvailableKbps));
+  EXPECT_TRUE(exp.BwHigh(AdvanceMs(2000), kAvailableKbps));
+}
+
+TEST_F(QualityRampupExperimentTest, ReportsBwHigh) {
+  test::ScopedFieldTrials field_trials(
+      "WebRTC-Video-QualityRampupSettings/"
+      "min_pixels:10000,min_duration_ms:2000/");
+  auto exp = QualityRampupExperiment::ParseSettings();
+
+  const uint32_t kMaxKbps = 800;
+  exp.SetMaxBitrate(/*pixels*/ 10000, kMaxKbps);
+
+  const uint32_t kAvailableKbps = kMaxKbps;
+  EXPECT_FALSE(exp.BwHigh(NowMs(), kAvailableKbps));
+  EXPECT_FALSE(exp.BwHigh(AdvanceMs(2000 - 1), kAvailableKbps));
+  EXPECT_FALSE(exp.BwHigh(AdvanceMs(1), kAvailableKbps - 1));  // Below, reset.
+  EXPECT_FALSE(exp.BwHigh(AdvanceMs(1), kAvailableKbps));
+  EXPECT_FALSE(exp.BwHigh(AdvanceMs(2000 - 1), kAvailableKbps));
+  EXPECT_TRUE(exp.BwHigh(AdvanceMs(1), kAvailableKbps));
+}
+
+}  // namespace
+}  // namespace webrtc