[Extensions Bindings] Add Events support

extensions/renderer/api_bindings_system_unittest.cc

Index: extensions/renderer/api_bindings_system_unittest.cc
diff --git a/extensions/renderer/api_bindings_system_unittest.cc b/extensions/renderer/api_bindings_system_unittest.cc
index 9e0941bd9d6c7c1b6c01ebe0bc346f35d0056d3b..0969d7e493b8aab88c5d260ce8c27ddc435b2786 100644
--- a/extensions/renderer/api_bindings_system_unittest.cc
+++ b/extensions/renderer/api_bindings_system_unittest.cc
@@ -53,6 +53,9 @@ const char kAlphaAPISpec[] =
     "      'name': 'callback',"
     "      'type': 'function'"
     "    }]"
+    "  }],"
+    "  'events': [{"
+    "    'name': 'alphaEvent'"
     "  }]"
     "}";
 
@@ -270,6 +273,26 @@ TEST_F(APIBindingsSystemTest, TestInitializationAndCallbacks) {
   }
 
   {
+    // Test an event registration -> event occurrence.
+    const char kTestCall[] =
+        "obj.alphaEvent.addListener(function() {\n"
+        "  this.eventArguments = Array.from(arguments);\n"
+        "});\n";
+    CallFunctionOnObject(context, alpha_api, kTestCall);
+
+    const char kResponseArgsJson[] = "['response',1,{'key':42}]";
+    std::unique_ptr<base::ListValue> expected_args =
+        ListValueFromString(kResponseArgsJson);
+    bindings_system()->FireEventInContext("alpha.alphaEvent", context,
+                                          *expected_args);
+
+    std::unique_ptr<base::Value> result = GetBaseValuePropertyFromObject(
+        context->Global(), context, "eventArguments");
+    ASSERT_TRUE(result);
+    EXPECT_EQ(ReplaceSingleQuotes(kResponseArgsJson), ValueToString(*result));
+  }
+
+  {
     // Test a call -> response on the second API.
     const char kTestCall[] = "obj.simpleFunc(2)";
     CallFunctionOnObject(context, beta_api, kTestCall);
@@ -416,6 +439,24 @@ TEST_F(APIBindingsSystemTestWithRealAPI, RealAPIs) {
     EXPECT_FALSE(last_request());
     reset_last_request();  // Just to not pollute future results.
   }
+
+  {
+    const char kTestCall[] =
+        "chrome.idle.onStateChanged.addListener(state => {\n"
+        "  this.idleState = state;\n"
+        "});\n";
+    ExecuteScript(context, kTestCall);
+    v8::Local<v8::Value> v8_result =
+        GetPropertyFromObject(context->Global(), context, "idleState");
+    EXPECT_TRUE(v8_result->IsUndefined());
+    bindings_system()->FireEventInContext("idle.onStateChanged", context,
+                                          *ListValueFromString("['active']"));
+
+    std::unique_ptr<base::Value> result =
+        GetBaseValuePropertyFromObject(context->Global(), context, "idleState");
+    ASSERT_TRUE(result);
+    EXPECT_EQ("\"active\"", ValueToString(*result));
+  }
 }
 
 }  // namespace extensions