Reland r130462: Implement FeatureProvider for ExtensionAPI."

chrome/common/extensions/feature_unittest.cc

 // Copyright (c) 2012 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 "chrome/common/extensions/feature.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 using extensions::Feature;
 
 namespace {
 
 struct IsAvailableTestData {
   std::string extension_id;
   Extension::Type extension_type;
-  Feature::Context context;
   Feature::Location location;
   Feature::Platform platform;
   int manifest_version;
   Feature::Availability expected_result;
 };
 
 }  // namespace
 
 TEST(ExtensionFeatureTest, IsAvailableNullCase) {
   const IsAvailableTestData tests[] = {
-    { "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_CONTEXT,
+    { "", Extension::TYPE_UNKNOWN,
       Feature::UNSPECIFIED_LOCATION, Feature::UNSPECIFIED_PLATFORM, -1,
       Feature::IS_AVAILABLE },
-    { "random-extension", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_CONTEXT,
+    { "random-extension", Extension::TYPE_UNKNOWN,
       Feature::UNSPECIFIED_LOCATION, Feature::UNSPECIFIED_PLATFORM, -1,
       Feature::IS_AVAILABLE },
-    { "", Extension::TYPE_PACKAGED_APP, Feature::UNSPECIFIED_CONTEXT,
+    { "", Extension::TYPE_PACKAGED_APP,
       Feature::UNSPECIFIED_LOCATION, Feature::UNSPECIFIED_PLATFORM, -1,
       Feature::IS_AVAILABLE },
-    { "", Extension::TYPE_UNKNOWN, Feature::BLESSED_EXTENSION_CONTEXT,
+    { "", Extension::TYPE_UNKNOWN,
       Feature::UNSPECIFIED_LOCATION, Feature::UNSPECIFIED_PLATFORM, -1,
       Feature::IS_AVAILABLE },
-    { "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_CONTEXT,
+    { "", Extension::TYPE_UNKNOWN,
       Feature::COMPONENT_LOCATION, Feature::UNSPECIFIED_PLATFORM, -1,
       Feature::IS_AVAILABLE },
-    { "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_CONTEXT,
+    { "", Extension::TYPE_UNKNOWN,
       Feature::UNSPECIFIED_LOCATION, Feature::CHROMEOS_PLATFORM, -1,
       Feature::IS_AVAILABLE },
-    { "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_CONTEXT,
+    { "", Extension::TYPE_UNKNOWN,
       Feature::UNSPECIFIED_LOCATION, Feature::UNSPECIFIED_PLATFORM, 25,
       Feature::IS_AVAILABLE }
   };
 
   Feature feature;
   for (size_t i = 0; i < arraysize(tests); ++i) {
     const IsAvailableTestData& test = tests[i];
     EXPECT_EQ(test.expected_result,
-              feature.IsAvailable(test.extension_id, test.extension_type,
-                                  test.location, test.context, test.platform,
-                                  test.manifest_version));
+              feature.IsAvailableToManifest(test.extension_id,
+                                            test.extension_type,
+                                            test.location,
+                                            test.manifest_version,
+                                            test.platform));
   }
 }
 
 TEST(ExtensionFeatureTest, Whitelist) {
   Feature feature;
   feature.whitelist()->insert("foo");
   feature.whitelist()->insert("bar");
 
-  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailable(
-      "foo", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
-  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailable(
-      "bar", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
+  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailableToManifest(
+      "foo", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION, -1,
+      Feature::UNSPECIFIED_PLATFORM));
+  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailableToManifest(
+      "bar", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION, -1,
+      Feature::UNSPECIFIED_PLATFORM));
 
-  EXPECT_EQ(Feature::NOT_FOUND_IN_WHITELIST, feature.IsAvailable(
-      "baz", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
-  EXPECT_EQ(Feature::NOT_FOUND_IN_WHITELIST, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
+  EXPECT_EQ(Feature::NOT_FOUND_IN_WHITELIST, feature.IsAvailableToManifest(
+      "baz", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION, -1,
+      Feature::UNSPECIFIED_PLATFORM));
+  EXPECT_EQ(Feature::NOT_FOUND_IN_WHITELIST, feature.IsAvailableToManifest(
+      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION, -1,
+      Feature::UNSPECIFIED_PLATFORM));
 
   feature.extension_types()->insert(Extension::TYPE_PACKAGED_APP);
-  EXPECT_EQ(Feature::NOT_FOUND_IN_WHITELIST, feature.IsAvailable(
-      "baz", Extension::TYPE_PACKAGED_APP, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
+  EXPECT_EQ(Feature::NOT_FOUND_IN_WHITELIST, feature.IsAvailableToManifest(
+      "baz", Extension::TYPE_PACKAGED_APP, Feature::UNSPECIFIED_LOCATION, -1,
+      Feature::UNSPECIFIED_PLATFORM));
 }
 
 TEST(ExtensionFeatureTest, PackageType) {
   Feature feature;
   feature.extension_types()->insert(Extension::TYPE_EXTENSION);
   feature.extension_types()->insert(Extension::TYPE_PACKAGED_APP);
 
-  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailable(
-      "", Extension::TYPE_EXTENSION, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
-  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailable(
-      "", Extension::TYPE_PACKAGED_APP, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
+  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailableToManifest(
+      "", Extension::TYPE_EXTENSION, Feature::UNSPECIFIED_LOCATION, -1,
+      Feature::UNSPECIFIED_PLATFORM));
+  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailableToManifest(
+      "", Extension::TYPE_PACKAGED_APP, Feature::UNSPECIFIED_LOCATION, -1,
+      Feature::UNSPECIFIED_PLATFORM));
 
-  EXPECT_EQ(Feature::INVALID_TYPE, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
-  EXPECT_EQ(Feature::INVALID_TYPE, feature.IsAvailable(
-      "", Extension::TYPE_THEME, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
+  EXPECT_EQ(Feature::INVALID_TYPE, feature.IsAvailableToManifest(
+      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION, -1,
+      Feature::UNSPECIFIED_PLATFORM));
+  EXPECT_EQ(Feature::INVALID_TYPE, feature.IsAvailableToManifest(
+      "", Extension::TYPE_THEME, Feature::UNSPECIFIED_LOCATION, -1,
+      Feature::UNSPECIFIED_PLATFORM));
 }
 
 TEST(ExtensionFeatureTest, Context) {
   Feature feature;
   feature.contexts()->insert(Feature::BLESSED_EXTENSION_CONTEXT);
-  feature.contexts()->insert(Feature::CONTENT_SCRIPT_CONTEXT);
+  feature.extension_types()->insert(Extension::TYPE_PACKAGED_APP);
+  feature.set_platform(Feature::CHROMEOS_PLATFORM);
+  feature.set_min_manifest_version(21);
+  feature.set_max_manifest_version(25);
 
-  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::BLESSED_EXTENSION_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
-  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::CONTENT_SCRIPT_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
+  DictionaryValue manifest;
+  manifest.SetString("name", "test");
+  manifest.SetString("version", "1");
+  manifest.SetInteger("manifest_version", 21);
+  manifest.SetString("app.launch.local_path", "foo.html");
 
-  EXPECT_EQ(Feature::INVALID_CONTEXT, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNBLESSED_EXTENSION_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
-  EXPECT_EQ(Feature::INVALID_CONTEXT, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
+  std::string error;
+  scoped_refptr<const Extension> extension(Extension::Create(
+      FilePath(), Extension::INTERNAL, manifest, Extension::NO_FLAGS, &error));
+  EXPECT_EQ("", error);
+  ASSERT_TRUE(extension.get());
+
+  feature.whitelist()->insert("monkey");
+  EXPECT_EQ(Feature::NOT_FOUND_IN_WHITELIST, feature.IsAvailableToContext(
+      extension.get(), Feature::BLESSED_EXTENSION_CONTEXT,
+      Feature::CHROMEOS_PLATFORM));
+  feature.whitelist()->clear();
+
+  feature.extension_types()->clear();
+  feature.extension_types()->insert(Extension::TYPE_THEME);
+  EXPECT_EQ(Feature::INVALID_TYPE, feature.IsAvailableToContext(
+      extension.get(), Feature::BLESSED_EXTENSION_CONTEXT,
+      Feature::CHROMEOS_PLATFORM));
+  feature.extension_types()->clear();
+  feature.extension_types()->insert(Extension::TYPE_PACKAGED_APP);
+
+  feature.contexts()->clear();
+  feature.contexts()->insert(Feature::UNBLESSED_EXTENSION_CONTEXT);
+  EXPECT_EQ(Feature::INVALID_CONTEXT, feature.IsAvailableToContext(
+      extension.get(), Feature::BLESSED_EXTENSION_CONTEXT,
+      Feature::CHROMEOS_PLATFORM));
+  feature.contexts()->clear();
+  feature.contexts()->insert(Feature::BLESSED_EXTENSION_CONTEXT);
+
+  feature.set_location(Feature::COMPONENT_LOCATION);
+  EXPECT_EQ(Feature::INVALID_LOCATION, feature.IsAvailableToContext(
+      extension.get(), Feature::BLESSED_EXTENSION_CONTEXT,
+      Feature::CHROMEOS_PLATFORM));
+  feature.set_location(Feature::UNSPECIFIED_LOCATION);
+
+  EXPECT_EQ(Feature::INVALID_PLATFORM, feature.IsAvailableToContext(
+      extension.get(), Feature::BLESSED_EXTENSION_CONTEXT,
+      Feature::UNSPECIFIED_PLATFORM));
+
+  feature.set_min_manifest_version(22);
+  EXPECT_EQ(Feature::INVALID_MIN_MANIFEST_VERSION, feature.IsAvailableToContext(
+      extension.get(), Feature::BLESSED_EXTENSION_CONTEXT,
+      Feature::CHROMEOS_PLATFORM));
+  feature.set_min_manifest_version(21);
+
+  feature.set_max_manifest_version(18);
+  EXPECT_EQ(Feature::INVALID_MAX_MANIFEST_VERSION, feature.IsAvailableToContext(
+      extension.get(), Feature::BLESSED_EXTENSION_CONTEXT,
+      Feature::CHROMEOS_PLATFORM));
+  feature.set_max_manifest_version(25);
 }
 
 TEST(ExtensionFeatureTest, Location) {
   Feature feature;
 
   // If the feature specifies "component" as its location, then only component
   // extensions can access it.
   feature.set_location(Feature::COMPONENT_LOCATION);
-  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::COMPONENT_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
-  EXPECT_EQ(Feature::INVALID_LOCATION, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
+  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailableToManifest(
+      "", Extension::TYPE_UNKNOWN, Feature::COMPONENT_LOCATION, -1,
+      Feature::UNSPECIFIED_PLATFORM));
+  EXPECT_EQ(Feature::INVALID_LOCATION, feature.IsAvailableToManifest(
+      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION, -1,
+      Feature::UNSPECIFIED_PLATFORM));
 
   // But component extensions can access anything else, whatever their location.
   feature.set_location(Feature::UNSPECIFIED_LOCATION);
-  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::COMPONENT_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
+  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailableToManifest(
+      "", Extension::TYPE_UNKNOWN, Feature::COMPONENT_LOCATION, -1,
+      Feature::UNSPECIFIED_PLATFORM));
 }
 
 TEST(ExtensionFeatureTest, Platform) {
   Feature feature;
   feature.set_platform(Feature::CHROMEOS_PLATFORM);
-  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::CHROMEOS_PLATFORM, -1));
-  EXPECT_EQ(Feature::INVALID_PLATFORM, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, -1));
+  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailableToManifest(
+      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION, -1,
+      Feature::CHROMEOS_PLATFORM));
+  EXPECT_EQ(Feature::INVALID_PLATFORM, feature.IsAvailableToManifest(
+      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION, -1,
+      Feature::UNSPECIFIED_PLATFORM));
 }
 
 TEST(ExtensionFeatureTest, Version) {
   Feature feature;
   feature.set_min_manifest_version(5);
 
-  EXPECT_EQ(Feature::INVALID_MIN_MANIFEST_VERSION, feature.IsAvailable(
+  EXPECT_EQ(Feature::INVALID_MIN_MANIFEST_VERSION,
+            feature.IsAvailableToManifest(
+                "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
+                0, Feature::UNSPECIFIED_PLATFORM));
+  EXPECT_EQ(Feature::INVALID_MIN_MANIFEST_VERSION,
+            feature.IsAvailableToManifest(
+                "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
+                4, Feature::UNSPECIFIED_PLATFORM));
+
+  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailableToManifest(
       "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, 0));
-  EXPECT_EQ(Feature::INVALID_MIN_MANIFEST_VERSION, feature.IsAvailable(
+      5, Feature::UNSPECIFIED_PLATFORM));
+  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailableToManifest(
       "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, 4));
-
-  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, 5));
-  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, 10));
+      10, Feature::UNSPECIFIED_PLATFORM));
 
   feature.set_max_manifest_version(8);
 
-  EXPECT_EQ(Feature::INVALID_MAX_MANIFEST_VERSION, feature.IsAvailable(
+  EXPECT_EQ(Feature::INVALID_MAX_MANIFEST_VERSION,
+            feature.IsAvailableToManifest(
+                "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
+                10, Feature::UNSPECIFIED_PLATFORM));
+  EXPECT_EQ(Feature::IS_AVAILABLE,
+            feature.IsAvailableToManifest(
+                "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
+                8, Feature::UNSPECIFIED_PLATFORM));
+  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailableToManifest(
       "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, 10));
-  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, 8));
-  EXPECT_EQ(Feature::IS_AVAILABLE, feature.IsAvailable(
-      "", Extension::TYPE_UNKNOWN, Feature::UNSPECIFIED_LOCATION,
-      Feature::UNSPECIFIED_CONTEXT, Feature::UNSPECIFIED_PLATFORM, 7));
+      7, Feature::UNSPECIFIED_PLATFORM));
 }
 
 TEST(ExtensionFeatureTest, ParseNull) {
   scoped_ptr<DictionaryValue> value(new DictionaryValue());
-  scoped_ptr<Feature> feature(Feature::Parse(value.get()));
+  scoped_ptr<Feature> feature(new Feature());
+  feature->Parse(value.get());
   EXPECT_TRUE(feature->whitelist()->empty());
   EXPECT_TRUE(feature->extension_types()->empty());
   EXPECT_TRUE(feature->contexts()->empty());
   EXPECT_EQ(Feature::UNSPECIFIED_LOCATION, feature->location());
   EXPECT_EQ(Feature::UNSPECIFIED_PLATFORM, feature->platform());
   EXPECT_EQ(0, feature->min_manifest_version());
   EXPECT_EQ(0, feature->max_manifest_version());
 }
 
 TEST(ExtensionFeatureTest, ParseWhitelist) {
   scoped_ptr<DictionaryValue> value(new DictionaryValue());
   ListValue* whitelist = new ListValue();
   whitelist->Append(Value::CreateStringValue("foo"));
   whitelist->Append(Value::CreateStringValue("bar"));
   value->Set("whitelist", whitelist);
-  scoped_ptr<Feature> feature(Feature::Parse(value.get()));
+  scoped_ptr<Feature> feature(new Feature());
+  feature->Parse(value.get());
   EXPECT_EQ(2u, feature->whitelist()->size());
   EXPECT_TRUE(feature->whitelist()->count("foo"));
   EXPECT_TRUE(feature->whitelist()->count("bar"));
 }
 
 TEST(ExtensionFeatureTest, ParsePackageTypes) {
   scoped_ptr<DictionaryValue> value(new DictionaryValue());
   ListValue* extension_types = new ListValue();
   extension_types->Append(Value::CreateStringValue("extension"));
   extension_types->Append(Value::CreateStringValue("theme"));
   extension_types->Append(Value::CreateStringValue("packaged_app"));
   extension_types->Append(Value::CreateStringValue("hosted_app"));
   extension_types->Append(Value::CreateStringValue("platform_app"));
   value->Set("extension_types", extension_types);
-  scoped_ptr<Feature> feature(Feature::Parse(value.get()));
+  scoped_ptr<Feature> feature(new Feature());
+  feature->Parse(value.get());
   EXPECT_EQ(5u, feature->extension_types()->size());
   EXPECT_TRUE(feature->extension_types()->count(Extension::TYPE_EXTENSION));
   EXPECT_TRUE(feature->extension_types()->count(Extension::TYPE_THEME));
   EXPECT_TRUE(feature->extension_types()->count(Extension::TYPE_PACKAGED_APP));
   EXPECT_TRUE(feature->extension_types()->count(Extension::TYPE_HOSTED_APP));
   EXPECT_TRUE(feature->extension_types()->count(Extension::TYPE_PLATFORM_APP));
 
   value->SetString("extension_types", "all");
-  scoped_ptr<Feature> feature2(Feature::Parse(value.get()));
+  scoped_ptr<Feature> feature2(new Feature());
+  feature2->Parse(value.get());
   EXPECT_EQ(*(feature->extension_types()), *(feature2->extension_types()));
 }
 
 TEST(ExtensionFeatureTest, ParseContexts) {
   scoped_ptr<DictionaryValue> value(new DictionaryValue());
   ListValue* contexts = new ListValue();
   contexts->Append(Value::CreateStringValue("blessed_extension"));
   contexts->Append(Value::CreateStringValue("unblessed_extension"));
   contexts->Append(Value::CreateStringValue("content_script"));
   contexts->Append(Value::CreateStringValue("web_page"));
   value->Set("contexts", contexts);
-  scoped_ptr<Feature> feature(Feature::Parse(value.get()));
+  scoped_ptr<Feature> feature(new Feature());
+  feature->Parse(value.get());
   EXPECT_EQ(4u, feature->contexts()->size());
   EXPECT_TRUE(feature->contexts()->count(Feature::BLESSED_EXTENSION_CONTEXT));
   EXPECT_TRUE(feature->contexts()->count(Feature::UNBLESSED_EXTENSION_CONTEXT));
   EXPECT_TRUE(feature->contexts()->count(Feature::CONTENT_SCRIPT_CONTEXT));
   EXPECT_TRUE(feature->contexts()->count(Feature::WEB_PAGE_CONTEXT));
 
   value->SetString("contexts", "all");
-  scoped_ptr<Feature> feature2(Feature::Parse(value.get()));
+  scoped_ptr<Feature> feature2(new Feature());
+  feature2->Parse(value.get());
   EXPECT_EQ(*(feature->contexts()), *(feature2->contexts()));
 }
 
 TEST(ExtensionFeatureTest, ParseLocation) {
   scoped_ptr<DictionaryValue> value(new DictionaryValue());
   value->SetString("location", "component");
-  scoped_ptr<Feature> feature(Feature::Parse(value.get()));
+  scoped_ptr<Feature> feature(new Feature());
+  feature->Parse(value.get());
   EXPECT_EQ(Feature::COMPONENT_LOCATION, feature->location());
 }
 
 TEST(ExtensionFeatureTest, ParsePlatform) {
   scoped_ptr<DictionaryValue> value(new DictionaryValue());
   value->SetString("platform", "chromeos");
-  scoped_ptr<Feature> feature(Feature::Parse(value.get()));
+  scoped_ptr<Feature> feature(new Feature());
+  feature->Parse(value.get());
   EXPECT_EQ(Feature::CHROMEOS_PLATFORM, feature->platform());
 }
 
 TEST(ExtensionFeatureTest, ManifestVersion) {
   scoped_ptr<DictionaryValue> value(new DictionaryValue());
   value->SetInteger("min_manifest_version", 1);
   value->SetInteger("max_manifest_version", 5);
-  scoped_ptr<Feature> feature(Feature::Parse(value.get()));
+  scoped_ptr<Feature> feature(new Feature());
+  feature->Parse(value.get());
   EXPECT_EQ(1, feature->min_manifest_version());
   EXPECT_EQ(5, feature->max_manifest_version());
 }
+
+TEST(ExtensionFeatureTest, Inheritance) {
+  Feature feature;
+  feature.whitelist()->insert("foo");
+  feature.extension_types()->insert(Extension::TYPE_THEME);
+  feature.contexts()->insert(Feature::BLESSED_EXTENSION_CONTEXT);
+  feature.set_location(Feature::COMPONENT_LOCATION);
+  feature.set_platform(Feature::CHROMEOS_PLATFORM);
+  feature.set_min_manifest_version(1);
+  feature.set_max_manifest_version(2);
+
+  Feature feature2 = feature;
+  EXPECT_TRUE(feature2.Equals(feature));
+
+  DictionaryValue definition;
+  feature2.Parse(&definition);
+  EXPECT_TRUE(feature2.Equals(feature));
+
+  ListValue* whitelist = new ListValue();
+  ListValue* extension_types = new ListValue();
+  ListValue* contexts = new ListValue();
+  whitelist->Append(Value::CreateStringValue("bar"));
+  extension_types->Append(Value::CreateStringValue("extension"));
+  contexts->Append(Value::CreateStringValue("unblessed_extension"));
+  definition.Set("whitelist", whitelist);
+  definition.Set("extension_types", extension_types);
+  definition.Set("contexts", contexts);
+  // Can't test location or platform because we only have one value so far.
+  definition.Set("min_manifest_version", Value::CreateIntegerValue(2));
+  definition.Set("max_manifest_version", Value::CreateIntegerValue(3));
+
+  feature2.Parse(&definition);
+  EXPECT_FALSE(feature2.Equals(feature));
+  EXPECT_EQ(1u, feature2.whitelist()->size());
+  EXPECT_EQ(1u, feature2.extension_types()->size());
+  EXPECT_EQ(1u, feature2.contexts()->size());
+  EXPECT_EQ(1u, feature2.whitelist()->count("bar"));
+  EXPECT_EQ(1u, feature2.extension_types()->count(Extension::TYPE_EXTENSION));
+  EXPECT_EQ(1u,
+            feature2.contexts()->count(Feature::UNBLESSED_EXTENSION_CONTEXT));
+  EXPECT_EQ(2, feature2.min_manifest_version());
+  EXPECT_EQ(3, feature2.max_manifest_version());
+}
+
+TEST(ExtensionFeatureTest, Equals) {
+  Feature feature;
+  feature.whitelist()->insert("foo");
+  feature.extension_types()->insert(Extension::TYPE_THEME);
+  feature.contexts()->insert(Feature::UNBLESSED_EXTENSION_CONTEXT);
+  feature.set_location(Feature::COMPONENT_LOCATION);
+  feature.set_platform(Feature::CHROMEOS_PLATFORM);
+  feature.set_min_manifest_version(18);
+  feature.set_max_manifest_version(25);
+
+  Feature feature2(feature);
+  EXPECT_TRUE(feature2.Equals(feature));
+
+  feature2.whitelist()->clear();
+  EXPECT_FALSE(feature2.Equals(feature));
+
+  feature2 = feature;
+  feature2.extension_types()->clear();
+  EXPECT_FALSE(feature2.Equals(feature));
+
+  feature2 = feature;
+  feature2.contexts()->clear();
+  EXPECT_FALSE(feature2.Equals(feature));
+
+  feature2 = feature;
+  feature2.set_location(Feature::UNSPECIFIED_LOCATION);
+  EXPECT_FALSE(feature2.Equals(feature));
+
+  feature2 = feature;
+  feature2.set_platform(Feature::UNSPECIFIED_PLATFORM);
+  EXPECT_FALSE(feature2.Equals(feature));
+
+  feature2 = feature;
+  feature2.set_min_manifest_version(0);
+  EXPECT_FALSE(feature2.Equals(feature));
+
+  feature2 = feature;
+  feature2.set_max_manifest_version(0);
+  EXPECT_FALSE(feature2.Equals(feature));
+}