1 // Copyright 2016 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/test/scoped_feature_list.h" 6 7 #include <string> 8 9 namespace base { 10 namespace test { 11 12 namespace { 13 14 static std::string GetFeatureString( 15 const std::initializer_list<base::Feature>& features) { 16 std::string output; 17 for (const base::Feature& feature : features) { 18 if (!output.empty()) 19 output += ","; 20 output += feature.name; 21 } 22 return output; 23 } 24 25 } // namespace 26 27 ScopedFeatureList::ScopedFeatureList() {} 28 29 ScopedFeatureList::~ScopedFeatureList() { 30 if (original_feature_list_) { 31 base::FeatureList::ClearInstanceForTesting(); 32 base::FeatureList::RestoreInstanceForTesting( 33 std::move(original_feature_list_)); 34 } 35 } 36 37 void ScopedFeatureList::Init() { 38 std::unique_ptr<base::FeatureList> feature_list(new base::FeatureList); 39 feature_list->InitializeFromCommandLine(std::string(), std::string()); 40 InitWithFeatureList(std::move(feature_list)); 41 } 42 43 void ScopedFeatureList::InitWithFeatures( 44 const std::initializer_list<base::Feature>& enabled_features, 45 const std::initializer_list<base::Feature>& disabled_features) { 46 InitFromCommandLine(GetFeatureString(enabled_features), 47 GetFeatureString(disabled_features)); 48 } 49 50 void ScopedFeatureList::InitWithFeatureList( 51 std::unique_ptr<FeatureList> feature_list) { 52 DCHECK(!original_feature_list_); 53 original_feature_list_ = base::FeatureList::ClearInstanceForTesting(); 54 base::FeatureList::SetInstance(std::move(feature_list)); 55 } 56 57 void ScopedFeatureList::InitFromCommandLine( 58 const std::string& enable_features, 59 const std::string& disable_features) { 60 std::unique_ptr<base::FeatureList> feature_list(new base::FeatureList); 61 feature_list->InitializeFromCommandLine(enable_features, disable_features); 62 InitWithFeatureList(std::move(feature_list)); 63 } 64 65 void ScopedFeatureList::InitAndEnableFeature(const base::Feature& feature) { 66 InitFromCommandLine(feature.name, std::string()); 67 } 68 69 void ScopedFeatureList::InitAndDisableFeature(const base::Feature& feature) { 70 InitFromCommandLine(std::string(), feature.name); 71 } 72 73 } // namespace test 74 } // namespace base 75
