| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/feature_list.h" |
| |
| #include <stddef.h> |
| |
| #include <algorithm> |
| #include <utility> |
| #include <vector> |
| |
| #include "base/format_macros.h" |
| #include "base/memory/read_only_shared_memory_region.h" |
| #include "base/metrics/field_trial.h" |
| #include "base/metrics/persistent_memory_allocator.h" |
| #include "base/stl_util.h" |
| #include "base/strings/string_piece.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/test/scoped_feature_list.h" |
| #include "base/test/scoped_field_trial_list_resetter.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace base { |
| |
| namespace { |
| |
| constexpr char kFeatureOnByDefaultName[] = "OnByDefault"; |
| struct Feature kFeatureOnByDefault { |
| kFeatureOnByDefaultName, FEATURE_ENABLED_BY_DEFAULT |
| }; |
| |
| constexpr char kFeatureOffByDefaultName[] = "OffByDefault"; |
| struct Feature kFeatureOffByDefault { |
| kFeatureOffByDefaultName, FEATURE_DISABLED_BY_DEFAULT |
| }; |
| |
| std::string SortFeatureListString(const std::string& feature_list) { |
| std::vector<base::StringPiece> features = |
| FeatureList::SplitFeatureListString(feature_list); |
| std::sort(features.begin(), features.end()); |
| return JoinString(features, ","); |
| } |
| |
| } // namespace |
| |
| class FeatureListTest : public testing::Test { |
| public: |
| FeatureListTest() { |
| // Provide an empty FeatureList to each test by default. |
| scoped_feature_list_.InitWithFeatureList(std::make_unique<FeatureList>()); |
| } |
| ~FeatureListTest() override = default; |
| |
| private: |
| test::ScopedFeatureList scoped_feature_list_; |
| |
| DISALLOW_COPY_AND_ASSIGN(FeatureListTest); |
| }; |
| |
| TEST_F(FeatureListTest, DefaultStates) { |
| EXPECT_TRUE(FeatureList::IsEnabled(kFeatureOnByDefault)); |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| } |
| |
| TEST_F(FeatureListTest, InitializeFromCommandLine) { |
| struct { |
| const char* enable_features; |
| const char* disable_features; |
| bool expected_feature_on_state; |
| bool expected_feature_off_state; |
| } test_cases[] = { |
| {"", "", true, false}, |
| {"OffByDefault", "", true, true}, |
| {"OffByDefault", "OnByDefault", false, true}, |
| {"OnByDefault,OffByDefault", "", true, true}, |
| {"", "OnByDefault,OffByDefault", false, false}, |
| // In the case an entry is both, disable takes precedence. |
| {"OnByDefault", "OnByDefault,OffByDefault", false, false}, |
| }; |
| |
| for (size_t i = 0; i < base::size(test_cases); ++i) { |
| const auto& test_case = test_cases[i]; |
| SCOPED_TRACE(base::StringPrintf("Test[%" PRIuS "]: [%s] [%s]", i, |
| test_case.enable_features, |
| test_case.disable_features)); |
| |
| auto feature_list = std::make_unique<FeatureList>(); |
| feature_list->InitializeFromCommandLine(test_case.enable_features, |
| test_case.disable_features); |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| EXPECT_EQ(test_case.expected_feature_on_state, |
| FeatureList::IsEnabled(kFeatureOnByDefault)) |
| << i; |
| EXPECT_EQ(test_case.expected_feature_off_state, |
| FeatureList::IsEnabled(kFeatureOffByDefault)) |
| << i; |
| } |
| } |
| |
| TEST_F(FeatureListTest, CheckFeatureIdentity) { |
| // Tests that CheckFeatureIdentity() correctly detects when two different |
| // structs with the same feature name are passed to it. |
| |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::make_unique<FeatureList>()); |
| FeatureList* feature_list = FeatureList::GetInstance(); |
| |
| // Call it twice for each feature at the top of the file, since the first call |
| // makes it remember the entry and the second call will verify it. |
| EXPECT_TRUE(feature_list->CheckFeatureIdentity(kFeatureOnByDefault)); |
| EXPECT_TRUE(feature_list->CheckFeatureIdentity(kFeatureOnByDefault)); |
| EXPECT_TRUE(feature_list->CheckFeatureIdentity(kFeatureOffByDefault)); |
| EXPECT_TRUE(feature_list->CheckFeatureIdentity(kFeatureOffByDefault)); |
| |
| // Now, call it with a distinct struct for |kFeatureOnByDefaultName|, which |
| // should return false. |
| struct Feature kFeatureOnByDefault2 { |
| kFeatureOnByDefaultName, FEATURE_ENABLED_BY_DEFAULT |
| }; |
| EXPECT_FALSE(feature_list->CheckFeatureIdentity(kFeatureOnByDefault2)); |
| } |
| |
| TEST_F(FeatureListTest, FieldTrialOverrides) { |
| struct { |
| FeatureList::OverrideState trial1_state; |
| FeatureList::OverrideState trial2_state; |
| } test_cases[] = { |
| {FeatureList::OVERRIDE_DISABLE_FEATURE, |
| FeatureList::OVERRIDE_DISABLE_FEATURE}, |
| {FeatureList::OVERRIDE_DISABLE_FEATURE, |
| FeatureList::OVERRIDE_ENABLE_FEATURE}, |
| {FeatureList::OVERRIDE_ENABLE_FEATURE, |
| FeatureList::OVERRIDE_DISABLE_FEATURE}, |
| {FeatureList::OVERRIDE_ENABLE_FEATURE, |
| FeatureList::OVERRIDE_ENABLE_FEATURE}, |
| }; |
| |
| FieldTrial::ActiveGroup active_group; |
| for (size_t i = 0; i < base::size(test_cases); ++i) { |
| const auto& test_case = test_cases[i]; |
| SCOPED_TRACE(base::StringPrintf("Test[%" PRIuS "]", i)); |
| |
| test::ScopedFieldTrialListResetter resetter; |
| FieldTrialList field_trial_list(nullptr); |
| auto feature_list = std::make_unique<FeatureList>(); |
| |
| FieldTrial* trial1 = FieldTrialList::CreateFieldTrial("TrialExample1", "A"); |
| FieldTrial* trial2 = FieldTrialList::CreateFieldTrial("TrialExample2", "B"); |
| feature_list->RegisterFieldTrialOverride(kFeatureOnByDefaultName, |
| test_case.trial1_state, trial1); |
| feature_list->RegisterFieldTrialOverride(kFeatureOffByDefaultName, |
| test_case.trial2_state, trial2); |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| // Initially, neither trial should be active. |
| EXPECT_FALSE(FieldTrialList::IsTrialActive(trial1->trial_name())); |
| EXPECT_FALSE(FieldTrialList::IsTrialActive(trial2->trial_name())); |
| |
| const bool expected_enabled_1 = |
| (test_case.trial1_state == FeatureList::OVERRIDE_ENABLE_FEATURE); |
| EXPECT_EQ(expected_enabled_1, FeatureList::IsEnabled(kFeatureOnByDefault)); |
| // The above should have activated |trial1|. |
| EXPECT_TRUE(FieldTrialList::IsTrialActive(trial1->trial_name())); |
| EXPECT_FALSE(FieldTrialList::IsTrialActive(trial2->trial_name())); |
| |
| const bool expected_enabled_2 = |
| (test_case.trial2_state == FeatureList::OVERRIDE_ENABLE_FEATURE); |
| EXPECT_EQ(expected_enabled_2, FeatureList::IsEnabled(kFeatureOffByDefault)); |
| // The above should have activated |trial2|. |
| EXPECT_TRUE(FieldTrialList::IsTrialActive(trial1->trial_name())); |
| EXPECT_TRUE(FieldTrialList::IsTrialActive(trial2->trial_name())); |
| } |
| } |
| |
| TEST_F(FeatureListTest, FieldTrialAssociateUseDefault) { |
| auto feature_list = std::make_unique<FeatureList>(); |
| |
| FieldTrial* trial1 = FieldTrialList::CreateFieldTrial("TrialExample1", "A"); |
| FieldTrial* trial2 = FieldTrialList::CreateFieldTrial("TrialExample2", "B"); |
| feature_list->RegisterFieldTrialOverride( |
| kFeatureOnByDefaultName, FeatureList::OVERRIDE_USE_DEFAULT, trial1); |
| feature_list->RegisterFieldTrialOverride( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_USE_DEFAULT, trial2); |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| // Initially, neither trial should be active. |
| EXPECT_FALSE(FieldTrialList::IsTrialActive(trial1->trial_name())); |
| EXPECT_FALSE(FieldTrialList::IsTrialActive(trial2->trial_name())); |
| |
| // Check the feature enabled state is its default. |
| EXPECT_TRUE(FeatureList::IsEnabled(kFeatureOnByDefault)); |
| // The above should have activated |trial1|. |
| EXPECT_TRUE(FieldTrialList::IsTrialActive(trial1->trial_name())); |
| EXPECT_FALSE(FieldTrialList::IsTrialActive(trial2->trial_name())); |
| |
| // Check the feature enabled state is its default. |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| // The above should have activated |trial2|. |
| EXPECT_TRUE(FieldTrialList::IsTrialActive(trial1->trial_name())); |
| EXPECT_TRUE(FieldTrialList::IsTrialActive(trial2->trial_name())); |
| } |
| |
| TEST_F(FeatureListTest, CommandLineEnableTakesPrecedenceOverFieldTrial) { |
| auto feature_list = std::make_unique<FeatureList>(); |
| |
| // The feature is explicitly enabled on the command-line. |
| feature_list->InitializeFromCommandLine(kFeatureOffByDefaultName, ""); |
| |
| // But the FieldTrial would set the feature to disabled. |
| FieldTrial* trial = FieldTrialList::CreateFieldTrial("TrialExample2", "A"); |
| feature_list->RegisterFieldTrialOverride( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_DISABLE_FEATURE, trial); |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| EXPECT_FALSE(FieldTrialList::IsTrialActive(trial->trial_name())); |
| // Command-line should take precedence. |
| EXPECT_TRUE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| // Since the feature is on due to the command-line, and not as a result of the |
| // field trial, the field trial should not be activated (since the Associate* |
| // API wasn't used.) |
| EXPECT_FALSE(FieldTrialList::IsTrialActive(trial->trial_name())); |
| } |
| |
| TEST_F(FeatureListTest, CommandLineDisableTakesPrecedenceOverFieldTrial) { |
| auto feature_list = std::make_unique<FeatureList>(); |
| |
| // The feature is explicitly disabled on the command-line. |
| feature_list->InitializeFromCommandLine("", kFeatureOffByDefaultName); |
| |
| // But the FieldTrial would set the feature to enabled. |
| FieldTrial* trial = FieldTrialList::CreateFieldTrial("TrialExample2", "A"); |
| feature_list->RegisterFieldTrialOverride( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_ENABLE_FEATURE, trial); |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| EXPECT_FALSE(FieldTrialList::IsTrialActive(trial->trial_name())); |
| // Command-line should take precedence. |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| // Since the feature is on due to the command-line, and not as a result of the |
| // field trial, the field trial should not be activated (since the Associate* |
| // API wasn't used.) |
| EXPECT_FALSE(FieldTrialList::IsTrialActive(trial->trial_name())); |
| } |
| |
| TEST_F(FeatureListTest, IsFeatureOverriddenFromCommandLine) { |
| auto feature_list = std::make_unique<FeatureList>(); |
| |
| // No features are overridden from the command line yet |
| EXPECT_FALSE(feature_list->IsFeatureOverriddenFromCommandLine( |
| kFeatureOnByDefaultName, FeatureList::OVERRIDE_DISABLE_FEATURE)); |
| EXPECT_FALSE(feature_list->IsFeatureOverriddenFromCommandLine( |
| kFeatureOnByDefaultName, FeatureList::OVERRIDE_ENABLE_FEATURE)); |
| EXPECT_FALSE(feature_list->IsFeatureOverriddenFromCommandLine( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_DISABLE_FEATURE)); |
| EXPECT_FALSE(feature_list->IsFeatureOverriddenFromCommandLine( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_ENABLE_FEATURE)); |
| |
| // Now, enable |kFeatureOffByDefaultName| via the command-line. |
| feature_list->InitializeFromCommandLine(kFeatureOffByDefaultName, ""); |
| |
| // It should now be overridden for the enabled group. |
| EXPECT_FALSE(feature_list->IsFeatureOverriddenFromCommandLine( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_DISABLE_FEATURE)); |
| EXPECT_TRUE(feature_list->IsFeatureOverriddenFromCommandLine( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_ENABLE_FEATURE)); |
| |
| // Register a field trial to associate with the feature and ensure that the |
| // results are still the same. |
| feature_list->AssociateReportingFieldTrial( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_ENABLE_FEATURE, |
| FieldTrialList::CreateFieldTrial("Trial1", "A")); |
| EXPECT_FALSE(feature_list->IsFeatureOverriddenFromCommandLine( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_DISABLE_FEATURE)); |
| EXPECT_TRUE(feature_list->IsFeatureOverriddenFromCommandLine( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_ENABLE_FEATURE)); |
| |
| // Now, register a field trial to override |kFeatureOnByDefaultName| state |
| // and check that the function still returns false for that feature. |
| feature_list->RegisterFieldTrialOverride( |
| kFeatureOnByDefaultName, FeatureList::OVERRIDE_DISABLE_FEATURE, |
| FieldTrialList::CreateFieldTrial("Trial2", "A")); |
| EXPECT_FALSE(feature_list->IsFeatureOverriddenFromCommandLine( |
| kFeatureOnByDefaultName, FeatureList::OVERRIDE_DISABLE_FEATURE)); |
| EXPECT_FALSE(feature_list->IsFeatureOverriddenFromCommandLine( |
| kFeatureOnByDefaultName, FeatureList::OVERRIDE_ENABLE_FEATURE)); |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| // Check the expected feature states for good measure. |
| EXPECT_TRUE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOnByDefault)); |
| } |
| |
| TEST_F(FeatureListTest, AssociateReportingFieldTrial) { |
| struct { |
| const char* enable_features; |
| const char* disable_features; |
| bool expected_enable_trial_created; |
| bool expected_disable_trial_created; |
| } test_cases[] = { |
| // If no enable/disable flags are specified, no trials should be created. |
| {"", "", false, false}, |
| // Enabling the feature should result in the enable trial created. |
| {kFeatureOffByDefaultName, "", true, false}, |
| // Disabling the feature should result in the disable trial created. |
| {"", kFeatureOffByDefaultName, false, true}, |
| }; |
| |
| const char kTrialName[] = "ForcingTrial"; |
| const char kForcedOnGroupName[] = "ForcedOn"; |
| const char kForcedOffGroupName[] = "ForcedOff"; |
| |
| for (size_t i = 0; i < base::size(test_cases); ++i) { |
| const auto& test_case = test_cases[i]; |
| SCOPED_TRACE(base::StringPrintf("Test[%" PRIuS "]: [%s] [%s]", i, |
| test_case.enable_features, |
| test_case.disable_features)); |
| |
| test::ScopedFieldTrialListResetter resetter; |
| FieldTrialList field_trial_list(nullptr); |
| auto feature_list = std::make_unique<FeatureList>(); |
| feature_list->InitializeFromCommandLine(test_case.enable_features, |
| test_case.disable_features); |
| |
| FieldTrial* enable_trial = nullptr; |
| if (feature_list->IsFeatureOverriddenFromCommandLine( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_ENABLE_FEATURE)) { |
| enable_trial = base::FieldTrialList::CreateFieldTrial(kTrialName, |
| kForcedOnGroupName); |
| feature_list->AssociateReportingFieldTrial( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_ENABLE_FEATURE, |
| enable_trial); |
| } |
| FieldTrial* disable_trial = nullptr; |
| if (feature_list->IsFeatureOverriddenFromCommandLine( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_DISABLE_FEATURE)) { |
| disable_trial = base::FieldTrialList::CreateFieldTrial( |
| kTrialName, kForcedOffGroupName); |
| feature_list->AssociateReportingFieldTrial( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_DISABLE_FEATURE, |
| disable_trial); |
| } |
| EXPECT_EQ(test_case.expected_enable_trial_created, enable_trial != nullptr); |
| EXPECT_EQ(test_case.expected_disable_trial_created, |
| disable_trial != nullptr); |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| EXPECT_FALSE(FieldTrialList::IsTrialActive(kTrialName)); |
| if (disable_trial) { |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| EXPECT_TRUE(FieldTrialList::IsTrialActive(kTrialName)); |
| EXPECT_EQ(kForcedOffGroupName, disable_trial->group_name()); |
| } else if (enable_trial) { |
| EXPECT_TRUE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| EXPECT_TRUE(FieldTrialList::IsTrialActive(kTrialName)); |
| EXPECT_EQ(kForcedOnGroupName, enable_trial->group_name()); |
| } |
| } |
| } |
| |
| TEST_F(FeatureListTest, RegisterExtraFeatureOverrides) { |
| auto feature_list = std::make_unique<FeatureList>(); |
| std::vector<FeatureList::FeatureOverrideInfo> overrides; |
| overrides.push_back({std::cref(kFeatureOnByDefault), |
| FeatureList::OverrideState::OVERRIDE_DISABLE_FEATURE}); |
| overrides.push_back({std::cref(kFeatureOffByDefault), |
| FeatureList::OverrideState::OVERRIDE_ENABLE_FEATURE}); |
| feature_list->RegisterExtraFeatureOverrides(std::move(overrides)); |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOnByDefault)); |
| EXPECT_TRUE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| } |
| |
| TEST_F(FeatureListTest, InitializeFromCommandLineThenRegisterExtraOverrides) { |
| auto feature_list = std::make_unique<FeatureList>(); |
| feature_list->InitializeFromCommandLine(kFeatureOnByDefaultName, |
| kFeatureOffByDefaultName); |
| std::vector<FeatureList::FeatureOverrideInfo> overrides; |
| overrides.push_back({std::cref(kFeatureOnByDefault), |
| FeatureList::OverrideState::OVERRIDE_DISABLE_FEATURE}); |
| overrides.push_back({std::cref(kFeatureOffByDefault), |
| FeatureList::OverrideState::OVERRIDE_ENABLE_FEATURE}); |
| feature_list->RegisterExtraFeatureOverrides(std::move(overrides)); |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| // The InitializeFromCommandLine supersedes the RegisterExtraFeatureOverrides |
| // because it was called first. |
| EXPECT_TRUE(FeatureList::IsEnabled(kFeatureOnByDefault)); |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| |
| std::string enable_features; |
| std::string disable_features; |
| FeatureList::GetInstance()->GetFeatureOverrides(&enable_features, |
| &disable_features); |
| EXPECT_EQ(kFeatureOnByDefaultName, SortFeatureListString(enable_features)); |
| EXPECT_EQ(kFeatureOffByDefaultName, SortFeatureListString(disable_features)); |
| } |
| |
| TEST_F(FeatureListTest, GetFeatureOverrides) { |
| auto feature_list = std::make_unique<FeatureList>(); |
| feature_list->InitializeFromCommandLine("A,X", "D"); |
| |
| Feature feature_b = {"B", FEATURE_ENABLED_BY_DEFAULT}; |
| Feature feature_c = {"C", FEATURE_DISABLED_BY_DEFAULT}; |
| std::vector<FeatureList::FeatureOverrideInfo> overrides; |
| overrides.push_back({std::cref(feature_b), |
| FeatureList::OverrideState::OVERRIDE_DISABLE_FEATURE}); |
| overrides.push_back({std::cref(feature_c), |
| FeatureList::OverrideState::OVERRIDE_ENABLE_FEATURE}); |
| feature_list->RegisterExtraFeatureOverrides(std::move(overrides)); |
| |
| FieldTrial* trial = FieldTrialList::CreateFieldTrial("Trial", "Group"); |
| feature_list->RegisterFieldTrialOverride(kFeatureOffByDefaultName, |
| FeatureList::OVERRIDE_ENABLE_FEATURE, |
| trial); |
| |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| std::string enable_features; |
| std::string disable_features; |
| FeatureList::GetInstance()->GetFeatureOverrides(&enable_features, |
| &disable_features); |
| EXPECT_EQ("A,C,OffByDefault<Trial,X", SortFeatureListString(enable_features)); |
| EXPECT_EQ("B,D", SortFeatureListString(disable_features)); |
| |
| FeatureList::GetInstance()->GetCommandLineFeatureOverrides(&enable_features, |
| &disable_features); |
| EXPECT_EQ("A,C,X", SortFeatureListString(enable_features)); |
| EXPECT_EQ("B,D", SortFeatureListString(disable_features)); |
| } |
| |
| TEST_F(FeatureListTest, GetFeatureOverrides_UseDefault) { |
| auto feature_list = std::make_unique<FeatureList>(); |
| feature_list->InitializeFromCommandLine("A,X", "D"); |
| |
| FieldTrial* trial = FieldTrialList::CreateFieldTrial("Trial", "Group"); |
| feature_list->RegisterFieldTrialOverride( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_USE_DEFAULT, trial); |
| |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| std::string enable_features; |
| std::string disable_features; |
| FeatureList::GetInstance()->GetFeatureOverrides(&enable_features, |
| &disable_features); |
| EXPECT_EQ("*OffByDefault<Trial,A,X", SortFeatureListString(enable_features)); |
| EXPECT_EQ("D", SortFeatureListString(disable_features)); |
| } |
| |
| TEST_F(FeatureListTest, GetFieldTrial) { |
| FieldTrial* trial = FieldTrialList::CreateFieldTrial("Trial", "Group"); |
| auto feature_list = std::make_unique<FeatureList>(); |
| feature_list->RegisterFieldTrialOverride( |
| kFeatureOnByDefaultName, FeatureList::OVERRIDE_USE_DEFAULT, trial); |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| EXPECT_EQ(trial, FeatureList::GetFieldTrial(kFeatureOnByDefault)); |
| EXPECT_EQ(nullptr, FeatureList::GetFieldTrial(kFeatureOffByDefault)); |
| } |
| |
| TEST_F(FeatureListTest, InitializeFromCommandLine_WithFieldTrials) { |
| FieldTrialList::CreateFieldTrial("Trial", "Group"); |
| auto feature_list = std::make_unique<FeatureList>(); |
| feature_list->InitializeFromCommandLine("A,OffByDefault<Trial,X", "D"); |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| EXPECT_FALSE(FieldTrialList::IsTrialActive("Trial")); |
| EXPECT_TRUE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| EXPECT_TRUE(FieldTrialList::IsTrialActive("Trial")); |
| } |
| |
| TEST_F(FeatureListTest, InitializeFromCommandLine_UseDefault) { |
| FieldTrialList::CreateFieldTrial("T1", "Group"); |
| FieldTrialList::CreateFieldTrial("T2", "Group"); |
| auto feature_list = std::make_unique<FeatureList>(); |
| feature_list->InitializeFromCommandLine( |
| "A,*OffByDefault<T1,*OnByDefault<T2,X", "D"); |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| EXPECT_FALSE(FieldTrialList::IsTrialActive("T1")); |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| EXPECT_TRUE(FieldTrialList::IsTrialActive("T1")); |
| |
| EXPECT_FALSE(FieldTrialList::IsTrialActive("T2")); |
| EXPECT_TRUE(FeatureList::IsEnabled(kFeatureOnByDefault)); |
| EXPECT_TRUE(FieldTrialList::IsTrialActive("T2")); |
| } |
| |
| TEST_F(FeatureListTest, InitializeInstance) { |
| std::unique_ptr<base::FeatureList> feature_list(new base::FeatureList); |
| test::ScopedFeatureList scoped_feature_list; |
| scoped_feature_list.InitWithFeatureList(std::move(feature_list)); |
| |
| EXPECT_TRUE(FeatureList::IsEnabled(kFeatureOnByDefault)); |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| |
| // Initialize from command line if we haven't yet. |
| FeatureList::InitializeInstance("", kFeatureOnByDefaultName); |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOnByDefault)); |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| |
| // Do not initialize from commandline if we have already. |
| FeatureList::InitializeInstance(kFeatureOffByDefaultName, ""); |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOnByDefault)); |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| } |
| |
| TEST_F(FeatureListTest, UninitializedInstance_IsEnabledReturnsFalse) { |
| std::unique_ptr<FeatureList> original_feature_list = |
| FeatureList::ClearInstanceForTesting(); |
| |
| // This test case simulates the calling pattern found in code which does not |
| // explicitly initialize the features list. |
| // All IsEnabled() calls should return the default value in this scenario. |
| EXPECT_EQ(nullptr, FeatureList::GetInstance()); |
| EXPECT_TRUE(FeatureList::IsEnabled(kFeatureOnByDefault)); |
| EXPECT_EQ(nullptr, FeatureList::GetInstance()); |
| EXPECT_FALSE(FeatureList::IsEnabled(kFeatureOffByDefault)); |
| |
| if (original_feature_list) |
| FeatureList::RestoreInstanceForTesting(std::move(original_feature_list)); |
| } |
| |
| TEST_F(FeatureListTest, StoreAndRetrieveFeaturesFromSharedMemory) { |
| std::unique_ptr<base::FeatureList> feature_list(new base::FeatureList); |
| |
| // Create some overrides. |
| feature_list->RegisterOverride(kFeatureOffByDefaultName, |
| FeatureList::OVERRIDE_ENABLE_FEATURE, nullptr); |
| feature_list->RegisterOverride( |
| kFeatureOnByDefaultName, FeatureList::OVERRIDE_DISABLE_FEATURE, nullptr); |
| feature_list->FinalizeInitialization(); |
| |
| // Create an allocator and store the overrides. |
| base::MappedReadOnlyRegion shm = |
| base::ReadOnlySharedMemoryRegion::Create(4 << 10); |
| WritableSharedPersistentMemoryAllocator allocator(std::move(shm.mapping), 1, |
| ""); |
| feature_list->AddFeaturesToAllocator(&allocator); |
| |
| std::unique_ptr<base::FeatureList> feature_list2(new base::FeatureList); |
| |
| // Check that the new feature list is empty. |
| EXPECT_FALSE(feature_list2->IsFeatureOverriddenFromCommandLine( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_ENABLE_FEATURE)); |
| EXPECT_FALSE(feature_list2->IsFeatureOverriddenFromCommandLine( |
| kFeatureOnByDefaultName, FeatureList::OVERRIDE_DISABLE_FEATURE)); |
| |
| feature_list2->InitializeFromSharedMemory(&allocator); |
| // Check that the new feature list now has 2 overrides. |
| EXPECT_TRUE(feature_list2->IsFeatureOverriddenFromCommandLine( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_ENABLE_FEATURE)); |
| EXPECT_TRUE(feature_list2->IsFeatureOverriddenFromCommandLine( |
| kFeatureOnByDefaultName, FeatureList::OVERRIDE_DISABLE_FEATURE)); |
| } |
| |
| TEST_F(FeatureListTest, StoreAndRetrieveAssociatedFeaturesFromSharedMemory) { |
| std::unique_ptr<base::FeatureList> feature_list(new base::FeatureList); |
| |
| // Create some overrides. |
| FieldTrial* trial1 = FieldTrialList::CreateFieldTrial("TrialExample1", "A"); |
| FieldTrial* trial2 = FieldTrialList::CreateFieldTrial("TrialExample2", "B"); |
| feature_list->RegisterFieldTrialOverride( |
| kFeatureOnByDefaultName, FeatureList::OVERRIDE_USE_DEFAULT, trial1); |
| feature_list->RegisterFieldTrialOverride( |
| kFeatureOffByDefaultName, FeatureList::OVERRIDE_USE_DEFAULT, trial2); |
| feature_list->FinalizeInitialization(); |
| |
| // Create an allocator and store the overrides. |
| base::MappedReadOnlyRegion shm = |
| base::ReadOnlySharedMemoryRegion::Create(4 << 10); |
| WritableSharedPersistentMemoryAllocator allocator(std::move(shm.mapping), 1, |
| ""); |
| feature_list->AddFeaturesToAllocator(&allocator); |
| |
| std::unique_ptr<base::FeatureList> feature_list2(new base::FeatureList); |
| feature_list2->InitializeFromSharedMemory(&allocator); |
| feature_list2->FinalizeInitialization(); |
| |
| // Check that the field trials are still associated. |
| FieldTrial* associated_trial1 = |
| feature_list2->GetAssociatedFieldTrial(kFeatureOnByDefault); |
| FieldTrial* associated_trial2 = |
| feature_list2->GetAssociatedFieldTrial(kFeatureOffByDefault); |
| EXPECT_EQ(associated_trial1, trial1); |
| EXPECT_EQ(associated_trial2, trial2); |
| } |
| |
| } // namespace base |
