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61deb0be81
Calling InitFieldTrialsFromString modifies a global variable so we must make sure that state is reset between test runs. Bug: webrtc:10335, webrtc:14336 Change-Id: Ia9839dd16a330ed3220ed470c28c541fc1cc0678 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/271022 Commit-Queue: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Auto-Submit: Emil Lundmark <lndmrk@webrtc.org> Cr-Commit-Position: refs/heads/main@{#37731}
137 lines
4.5 KiB
C++
137 lines
4.5 KiB
C++
/*
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* Copyright 2022 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "api/field_trials.h"
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#include <memory>
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#include "api/transport/field_trial_based_config.h"
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#include "system_wrappers/include/field_trial.h"
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#include "test/gmock.h"
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#include "test/gtest.h"
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#if GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
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#include "test/testsupport/rtc_expect_death.h"
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#endif // GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
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namespace webrtc {
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namespace {
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using ::testing::NotNull;
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using ::webrtc::field_trial::InitFieldTrialsFromString;
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class FieldTrialsTest : public testing::Test {
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protected:
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FieldTrialsTest() {
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// Make sure global state is consistent between test runs.
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InitFieldTrialsFromString(nullptr);
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}
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};
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TEST_F(FieldTrialsTest, EmptyStringHasNoEffect) {
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FieldTrials f("");
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EXPECT_FALSE(f.IsEnabled("MyCoolTrial"));
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EXPECT_FALSE(f.IsDisabled("MyCoolTrial"));
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}
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TEST_F(FieldTrialsTest, EnabledDisabledMustBeFirstInValue) {
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FieldTrials f(
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"MyCoolTrial/EnabledFoo/"
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"MyUncoolTrial/DisabledBar/"
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"AnotherTrial/BazEnabled/");
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EXPECT_TRUE(f.IsEnabled("MyCoolTrial"));
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EXPECT_TRUE(f.IsDisabled("MyUncoolTrial"));
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EXPECT_FALSE(f.IsEnabled("AnotherTrial"));
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}
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TEST_F(FieldTrialsTest, FieldTrialsDoesNotReadGlobalString) {
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static constexpr char s[] = "MyCoolTrial/Enabled/MyUncoolTrial/Disabled/";
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InitFieldTrialsFromString(s);
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FieldTrials f("");
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EXPECT_FALSE(f.IsEnabled("MyCoolTrial"));
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EXPECT_FALSE(f.IsDisabled("MyUncoolTrial"));
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}
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TEST_F(FieldTrialsTest, FieldTrialsWritesGlobalString) {
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FieldTrials f("MyCoolTrial/Enabled/MyUncoolTrial/Disabled/");
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EXPECT_TRUE(webrtc::field_trial::IsEnabled("MyCoolTrial"));
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EXPECT_TRUE(webrtc::field_trial::IsDisabled("MyUncoolTrial"));
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}
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TEST_F(FieldTrialsTest, FieldTrialsRestoresGlobalStringAfterDestruction) {
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static constexpr char s[] = "SomeString/Enabled/";
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InitFieldTrialsFromString(s);
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{
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FieldTrials f("SomeOtherString/Enabled/");
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EXPECT_STREQ(webrtc::field_trial::GetFieldTrialString(),
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"SomeOtherString/Enabled/");
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}
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EXPECT_STREQ(webrtc::field_trial::GetFieldTrialString(), s);
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}
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#if GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
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TEST_F(FieldTrialsTest, FieldTrialsDoesNotSupportSimultaneousInstances) {
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FieldTrials f("SomeString/Enabled/");
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RTC_EXPECT_DEATH(FieldTrials("SomeOtherString/Enabled/").Lookup("Whatever"),
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"Only one instance");
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}
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#endif // GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
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TEST_F(FieldTrialsTest, FieldTrialsSupportsSeparateInstances) {
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{ FieldTrials f("SomeString/Enabled/"); }
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{ FieldTrials f("SomeOtherString/Enabled/"); }
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}
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TEST_F(FieldTrialsTest, NonGlobalFieldTrialsInstanceDoesNotModifyGlobalString) {
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std::unique_ptr<FieldTrials> f =
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FieldTrials::CreateNoGlobal("SomeString/Enabled/");
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ASSERT_THAT(f, NotNull());
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EXPECT_TRUE(f->IsEnabled("SomeString"));
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EXPECT_FALSE(webrtc::field_trial::IsEnabled("SomeString"));
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}
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TEST_F(FieldTrialsTest, NonGlobalFieldTrialsSupportSimultaneousInstances) {
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std::unique_ptr<FieldTrials> f1 =
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FieldTrials::CreateNoGlobal("SomeString/Enabled/");
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std::unique_ptr<FieldTrials> f2 =
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FieldTrials::CreateNoGlobal("SomeOtherString/Enabled/");
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ASSERT_THAT(f1, NotNull());
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ASSERT_THAT(f2, NotNull());
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EXPECT_TRUE(f1->IsEnabled("SomeString"));
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EXPECT_FALSE(f1->IsEnabled("SomeOtherString"));
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EXPECT_FALSE(f2->IsEnabled("SomeString"));
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EXPECT_TRUE(f2->IsEnabled("SomeOtherString"));
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}
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TEST_F(FieldTrialsTest, GlobalAndNonGlobalFieldTrialsAreDisjoint) {
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FieldTrials f1("SomeString/Enabled/");
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std::unique_ptr<FieldTrials> f2 =
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FieldTrials::CreateNoGlobal("SomeOtherString/Enabled/");
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ASSERT_THAT(f2, NotNull());
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EXPECT_TRUE(f1.IsEnabled("SomeString"));
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EXPECT_FALSE(f1.IsEnabled("SomeOtherString"));
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EXPECT_FALSE(f2->IsEnabled("SomeString"));
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EXPECT_TRUE(f2->IsEnabled("SomeOtherString"));
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}
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TEST_F(FieldTrialsTest, FieldTrialBasedConfigReadsGlobalString) {
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static constexpr char s[] = "MyCoolTrial/Enabled/MyUncoolTrial/Disabled/";
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InitFieldTrialsFromString(s);
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FieldTrialBasedConfig f;
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EXPECT_TRUE(f.IsEnabled("MyCoolTrial"));
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EXPECT_TRUE(f.IsDisabled("MyUncoolTrial"));
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}
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} // namespace
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} // namespace webrtc
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