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1 // Copyright 2017 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 #include "base/metrics/field_trial.h" | |
9 #include "testing/gtest/include/gtest/gtest.h" | |
10 | |
11 namespace base { | |
12 namespace test { | |
13 | |
14 namespace { | |
15 | |
16 const base::Feature kTestFeature1{"TestFeature1", | |
17 base::FEATURE_DISABLED_BY_DEFAULT}; | |
18 const base::Feature kTestFeature2{"TestFeature2", | |
19 base::FEATURE_DISABLED_BY_DEFAULT}; | |
20 | |
21 void ExpectFeatures(const std::string& enabled_features, | |
22 const std::string& disabled_features) { | |
23 base::FeatureList* list = base::FeatureList::GetInstance(); | |
24 std::string actual_enabled_features; | |
25 std::string actual_disabled_features; | |
26 | |
27 list->GetFeatureOverrides(&actual_enabled_features, | |
28 &actual_disabled_features); | |
29 | |
30 EXPECT_EQ(enabled_features, actual_enabled_features); | |
31 EXPECT_EQ(disabled_features, actual_disabled_features); | |
32 } | |
33 | |
34 } // namespace | |
35 | |
36 class ScopedFeatureListTest : public testing::Test { | |
37 public: | |
38 ScopedFeatureListTest() { | |
39 // Clear default feature list. | |
40 std::unique_ptr<base::FeatureList> feature_list(new base::FeatureList); | |
41 feature_list->InitializeFromCommandLine(std::string(), std::string()); | |
42 original_feature_list_ = base::FeatureList::ClearInstanceForTesting(); | |
43 base::FeatureList::SetInstance(std::move(feature_list)); | |
44 } | |
45 | |
46 ~ScopedFeatureListTest() override { | |
47 // Restore feature list. | |
48 if (original_feature_list_) { | |
49 base::FeatureList::ClearInstanceForTesting(); | |
50 base::FeatureList::RestoreInstanceForTesting( | |
51 std::move(original_feature_list_)); | |
52 } | |
53 } | |
54 | |
55 private: | |
56 // Save the present FeatureList and restore it after test finish. | |
57 std::unique_ptr<FeatureList> original_feature_list_; | |
58 | |
59 DISALLOW_COPY_AND_ASSIGN(ScopedFeatureListTest); | |
60 }; | |
61 | |
62 TEST_F(ScopedFeatureListTest, BasicScoped) { | |
63 ExpectFeatures(std::string(), std::string()); | |
64 EXPECT_FALSE(FeatureList::IsEnabled(kTestFeature1)); | |
65 { | |
66 test::ScopedFeatureList feature_list1; | |
67 feature_list1.InitFromCommandLine("TestFeature1", std::string()); | |
68 ExpectFeatures("TestFeature1", std::string()); | |
69 EXPECT_TRUE(FeatureList::IsEnabled(kTestFeature1)); | |
70 } | |
71 ExpectFeatures(std::string(), std::string()); | |
72 EXPECT_FALSE(FeatureList::IsEnabled(kTestFeature1)); | |
73 } | |
74 | |
75 TEST_F(ScopedFeatureListTest, EnableFeatureOverrideDisable) { | |
76 test::ScopedFeatureList feature_list1; | |
77 feature_list1.InitWithFeatures({}, {kTestFeature1}); | |
78 | |
79 { | |
80 test::ScopedFeatureList feature_list2; | |
81 feature_list2.InitWithFeatures({kTestFeature1}, {}); | |
82 ExpectFeatures("TestFeature1", std::string()); | |
83 } | |
84 } | |
85 | |
86 TEST_F(ScopedFeatureListTest, FeatureOverrideNotMakeDuplicate) { | |
87 test::ScopedFeatureList feature_list1; | |
88 feature_list1.InitWithFeatures({}, {kTestFeature1}); | |
89 | |
90 { | |
91 test::ScopedFeatureList feature_list2; | |
92 feature_list2.InitWithFeatures({}, {kTestFeature1}); | |
93 ExpectFeatures(std::string(), "TestFeature1"); | |
94 } | |
95 } | |
96 | |
97 TEST_F(ScopedFeatureListTest, FeatureOverrideFeatureWithDefault) { | |
98 test::ScopedFeatureList feature_list1; | |
99 feature_list1.InitFromCommandLine("*TestFeature1", std::string()); | |
100 | |
101 { | |
102 test::ScopedFeatureList feature_list2; | |
103 feature_list2.InitWithFeatures({kTestFeature1}, {}); | |
104 ExpectFeatures("TestFeature1", std::string()); | |
105 } | |
106 } | |
107 | |
108 TEST_F(ScopedFeatureListTest, FeatureOverrideFeatureWithDefault2) { | |
109 test::ScopedFeatureList feature_list1; | |
110 feature_list1.InitFromCommandLine("*TestFeature1", std::string()); | |
111 | |
112 { | |
113 test::ScopedFeatureList feature_list2; | |
114 feature_list2.InitWithFeatures({}, {kTestFeature1}); | |
115 ExpectFeatures(std::string(), "TestFeature1"); | |
116 } | |
117 } | |
118 | |
119 TEST_F(ScopedFeatureListTest, FeatureOverrideFeatureWithEnabledFieldTried) { | |
120 test::ScopedFeatureList feature_list1; | |
121 | |
122 std::unique_ptr<FeatureList> feature_list(new FeatureList); | |
123 FieldTrialList field_trial_list(nullptr); | |
124 FieldTrial* trial = FieldTrialList::CreateFieldTrial("TrialExample", "A"); | |
125 feature_list->RegisterFieldTrialOverride( | |
126 kTestFeature1.name, FeatureList::OVERRIDE_ENABLE_FEATURE, trial); | |
127 feature_list1.InitWithFeatureList(std::move(feature_list)); | |
128 | |
129 { | |
130 test::ScopedFeatureList feature_list2; | |
131 feature_list2.InitWithFeatures({kTestFeature1}, {}); | |
132 ExpectFeatures("TestFeature1", std::string()); | |
133 } | |
134 } | |
135 | |
136 TEST_F(ScopedFeatureListTest, FeatureOverrideFeatureWithDisabledFieldTried) { | |
137 test::ScopedFeatureList feature_list1; | |
138 | |
139 std::unique_ptr<FeatureList> feature_list(new FeatureList); | |
140 FieldTrialList field_trial_list(nullptr); | |
141 FieldTrial* trial = FieldTrialList::CreateFieldTrial("TrialExample", "A"); | |
142 feature_list->RegisterFieldTrialOverride( | |
143 kTestFeature1.name, FeatureList::OVERRIDE_DISABLE_FEATURE, trial); | |
144 feature_list1.InitWithFeatureList(std::move(feature_list)); | |
145 | |
146 { | |
147 test::ScopedFeatureList feature_list2; | |
148 feature_list2.InitWithFeatures({kTestFeature1}, {}); | |
149 ExpectFeatures("TestFeature1", std::string()); | |
150 } | |
151 } | |
152 | |
153 TEST_F(ScopedFeatureListTest, FeatureOverrideKeepsOtherExistingFeature) { | |
154 test::ScopedFeatureList feature_list1; | |
155 feature_list1.InitWithFeatures({}, {kTestFeature1}); | |
156 | |
157 { | |
158 test::ScopedFeatureList feature_list2; | |
159 feature_list2.InitWithFeatures({}, {kTestFeature2}); | |
160 EXPECT_FALSE(FeatureList::IsEnabled(kTestFeature1)); | |
161 EXPECT_FALSE(FeatureList::IsEnabled(kTestFeature2)); | |
162 } | |
163 } | |
164 | |
165 TEST_F(ScopedFeatureListTest, FeatureOverrideKeepsOtherExistingFeature2) { | |
166 test::ScopedFeatureList feature_list1; | |
167 feature_list1.InitWithFeatures({}, {kTestFeature1}); | |
168 | |
169 { | |
170 test::ScopedFeatureList feature_list2; | |
171 feature_list2.InitWithFeatures({kTestFeature2}, {}); | |
172 ExpectFeatures("TestFeature2", "TestFeature1"); | |
173 } | |
174 } | |
175 | |
176 TEST_F(ScopedFeatureListTest, FeatureOverrideKeepsOtherExistingDefaultFeature) { | |
177 test::ScopedFeatureList feature_list1; | |
178 feature_list1.InitFromCommandLine("*TestFeature1", std::string()); | |
179 | |
180 { | |
181 test::ScopedFeatureList feature_list2; | |
182 feature_list2.InitWithFeatures({}, {kTestFeature2}); | |
183 ExpectFeatures("*TestFeature1", "TestFeature2"); | |
184 } | |
185 } | |
186 | |
187 } // namespace test | |
188 } // namespace base | |
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