Add support for writing unit tests for Mojo-backed apps/extensions APIs.

extensions/test/test_extensions_client.cc

Index: extensions/test/test_extensions_client.cc
diff --git a/extensions/test/test_extensions_client.cc b/extensions/test/test_extensions_client.cc
index 8cee49a19c25046dd71f08138847451721b42cb9..47a6a4750877e313a039f162245dd87955d72437 100644
--- a/extensions/test/test_extensions_client.cc
+++ b/extensions/test/test_extensions_client.cc
@@ -4,15 +4,30 @@
 
 #include "extensions/test/test_extensions_client.h"
 
+#include "extensions/common/api/generated_schemas.h"
 #include "extensions/common/common_manifest_handlers.h"
+#include "extensions/common/features/api_feature.h"
+#include "extensions/common/features/base_feature_provider.h"
 #include "extensions/common/features/feature_provider.h"
 #include "extensions/common/features/json_feature_provider_source.h"
+#include "extensions/common/features/manifest_feature.h"
+#include "extensions/common/features/permission_feature.h"
 #include "extensions/common/manifest_handler.h"
 #include "extensions/common/url_pattern_set.h"
 #include "extensions/test/test_permission_message_provider.h"
+#include "grit/extensions_resources.h"
 
 namespace extensions {
 
+namespace {
+
+template <class FeatureClass>
+SimpleFeature* CreateFeature() {
+  return new FeatureClass;
+}
+
+}  // namespace
+
 TestExtensionsClient::TestExtensionsClient() {
 }
 
@@ -34,17 +49,42 @@ TestExtensionsClient::GetPermissionMessageProvider() const {
   return provider;
 }
 
-// TODO(yoz): Implement something reasonable here.
 scoped_ptr<FeatureProvider> TestExtensionsClient::CreateFeatureProvider(
     const std::string& name) const {
-  return scoped_ptr<FeatureProvider>();
+  scoped_ptr<FeatureProvider> provider;
+  scoped_ptr<JSONFeatureProviderSource> source(
+      CreateFeatureProviderSource(name));
+  if (name == "api") {
+    provider.reset(new BaseFeatureProvider(source->dictionary(),
+                                           CreateFeature<APIFeature>));
+  } else if (name == "manifest") {
+    provider.reset(new BaseFeatureProvider(source->dictionary(),
+                                           CreateFeature<ManifestFeature>));
+  } else if (name == "permission") {
+    provider.reset(new BaseFeatureProvider(source->dictionary(),
+                                           CreateFeature<PermissionFeature>));
+  } else {
+    NOTREACHED();
+  }
+  return provider.Pass();
 }
 
-// TODO(yoz): Implement something reasonable here.
 scoped_ptr<JSONFeatureProviderSource>
 TestExtensionsClient::CreateFeatureProviderSource(
     const std::string& name) const {
-  return scoped_ptr<JSONFeatureProviderSource>();
+  scoped_ptr<JSONFeatureProviderSource> source(
+      new JSONFeatureProviderSource(name));
+  if (name == "api") {
+    source->LoadJSON(IDR_EXTENSION_API_FEATURES);
+  } else if (name == "manifest") {
+    source->LoadJSON(IDR_EXTENSION_MANIFEST_FEATURES);
+  } else if (name == "permission") {
+    source->LoadJSON(IDR_EXTENSION_PERMISSION_FEATURES);
+  } else {
+    NOTREACHED();
+    source.reset();
+  }
+  return source.Pass();
 }
 
 void TestExtensionsClient::FilterHostPermissions(
@@ -77,12 +117,12 @@ bool TestExtensionsClient::IsScriptableURL(const GURL& url,
 
 bool TestExtensionsClient::IsAPISchemaGenerated(
     const std::string& name) const {
-  return false;
+  return core_api::GeneratedSchemas::IsGenerated(name);
 }
 
 base::StringPiece TestExtensionsClient::GetAPISchema(
     const std::string& name) const {
-  return base::StringPiece();
+  return core_api::GeneratedSchemas::Get(name);
 }
 
 void TestExtensionsClient::RegisterAPISchemaResources(ExtensionAPI* api) const {