1 /*
2 * Copyright 2018 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10 #include "rtc_base/experiments/field_trial_units.h"
11
12 #include <string>
13
14 #include "absl/strings/string_view.h"
15 #include "absl/types/optional.h"
16 #include "rtc_base/experiments/field_trial_parser.h"
17 #include "test/gtest.h"
18
19 namespace webrtc {
20 namespace {
21 struct DummyExperiment {
22 FieldTrialParameter<DataRate> target_rate =
23 FieldTrialParameter<DataRate>("t", DataRate::KilobitsPerSec(100));
24 FieldTrialParameter<TimeDelta> period =
25 FieldTrialParameter<TimeDelta>("p", TimeDelta::Millis(100));
26 FieldTrialOptional<DataSize> max_buffer =
27 FieldTrialOptional<DataSize>("b", absl::nullopt);
28
DummyExperimentwebrtc::__anone87196960111::DummyExperiment29 explicit DummyExperiment(absl::string_view field_trial) {
30 ParseFieldTrial({&target_rate, &max_buffer, &period}, field_trial);
31 }
32 };
33 } // namespace
34
TEST(FieldTrialParserUnitsTest,FallsBackToDefaults)35 TEST(FieldTrialParserUnitsTest, FallsBackToDefaults) {
36 DummyExperiment exp("");
37 EXPECT_EQ(exp.target_rate.Get(), DataRate::KilobitsPerSec(100));
38 EXPECT_FALSE(exp.max_buffer.GetOptional().has_value());
39 EXPECT_EQ(exp.period.Get(), TimeDelta::Millis(100));
40 }
TEST(FieldTrialParserUnitsTest,ParsesUnitParameters)41 TEST(FieldTrialParserUnitsTest, ParsesUnitParameters) {
42 DummyExperiment exp("t:300kbps,b:5bytes,p:300ms");
43 EXPECT_EQ(exp.target_rate.Get(), DataRate::KilobitsPerSec(300));
44 EXPECT_EQ(*exp.max_buffer.GetOptional(), DataSize::Bytes(5));
45 EXPECT_EQ(exp.period.Get(), TimeDelta::Millis(300));
46 }
TEST(FieldTrialParserUnitsTest,ParsesDefaultUnitParameters)47 TEST(FieldTrialParserUnitsTest, ParsesDefaultUnitParameters) {
48 DummyExperiment exp("t:300,b:5,p:300");
49 EXPECT_EQ(exp.target_rate.Get(), DataRate::KilobitsPerSec(300));
50 EXPECT_EQ(*exp.max_buffer.GetOptional(), DataSize::Bytes(5));
51 EXPECT_EQ(exp.period.Get(), TimeDelta::Millis(300));
52 }
TEST(FieldTrialParserUnitsTest,ParsesInfinityParameter)53 TEST(FieldTrialParserUnitsTest, ParsesInfinityParameter) {
54 DummyExperiment exp("t:inf,p:inf");
55 EXPECT_EQ(exp.target_rate.Get(), DataRate::Infinity());
56 EXPECT_EQ(exp.period.Get(), TimeDelta::PlusInfinity());
57 }
TEST(FieldTrialParserUnitsTest,ParsesOtherUnitParameters)58 TEST(FieldTrialParserUnitsTest, ParsesOtherUnitParameters) {
59 DummyExperiment exp("t:300bps,p:0.3 seconds,b:8 bytes");
60 EXPECT_EQ(exp.target_rate.Get(), DataRate::BitsPerSec(300));
61 EXPECT_EQ(*exp.max_buffer.GetOptional(), DataSize::Bytes(8));
62 EXPECT_EQ(exp.period.Get(), TimeDelta::Millis(300));
63 }
TEST(FieldTrialParserUnitsTest,IgnoresOutOfRange)64 TEST(FieldTrialParserUnitsTest, IgnoresOutOfRange) {
65 FieldTrialConstrained<DataRate> rate("r", DataRate::KilobitsPerSec(30),
66 DataRate::KilobitsPerSec(10),
67 DataRate::KilobitsPerSec(100));
68 FieldTrialConstrained<TimeDelta> delta("d", TimeDelta::Millis(30),
69 TimeDelta::Millis(10),
70 TimeDelta::Millis(100));
71 FieldTrialConstrained<DataSize> size(
72 "s", DataSize::Bytes(30), DataSize::Bytes(10), DataSize::Bytes(100));
73 ParseFieldTrial({&rate, &delta, &size}, "r:0,d:0,s:0");
74 EXPECT_EQ(rate->kbps(), 30);
75 EXPECT_EQ(delta->ms(), 30);
76 EXPECT_EQ(size->bytes(), 30);
77 ParseFieldTrial({&rate, &delta, &size}, "r:300,d:300,s:300");
78 EXPECT_EQ(rate->kbps(), 30);
79 EXPECT_EQ(delta->ms(), 30);
80 EXPECT_EQ(size->bytes(), 30);
81 ParseFieldTrial({&rate, &delta, &size}, "r:50,d:50,s:50");
82 EXPECT_EQ(rate->kbps(), 50);
83 EXPECT_EQ(delta->ms(), 50);
84 EXPECT_EQ(size->bytes(), 50);
85 }
86
87 } // namespace webrtc
88