Add CallAsFunction method to the Object class in the API

test/cctest/test-api.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 6942 matching lines @@
 }
 
 
 // Test that a call handler can be set for objects which will allow
 // non-function objects created through the API to be called as
 // functions.
 THREADED_TEST(CallAsFunction) {
   v8::HandleScope scope;
   LocalContext context;
 
-  Local<v8::FunctionTemplate> t = v8::FunctionTemplate::New();
-  Local<ObjectTemplate> instance_template = t->InstanceTemplate();
-  instance_template->SetCallAsFunctionHandler(call_as_function);
-  Local<v8::Object> instance = t->GetFunction()->NewInstance();
-  context->Global()->Set(v8_str("obj"), instance);
-  v8::TryCatch try_catch;
-  Local<Value> value;
-  CHECK(!try_catch.HasCaught());
+  { Local<v8::FunctionTemplate> t = v8::FunctionTemplate::New();
+    Local<ObjectTemplate> instance_template = t->InstanceTemplate();
+    instance_template->SetCallAsFunctionHandler(call_as_function);
+    Local<v8::Object> instance = t->GetFunction()->NewInstance();
+    context->Global()->Set(v8_str("obj"), instance);
+    v8::TryCatch try_catch;
+    Local<Value> value;
+    CHECK(!try_catch.HasCaught());
 
-  value = CompileRun("obj(42)");
-  CHECK(!try_catch.HasCaught());
-  CHECK_EQ(42, value->Int32Value());
+    value = CompileRun("obj(42)");
+    CHECK(!try_catch.HasCaught());
+    CHECK_EQ(42, value->Int32Value());
 
-  value = CompileRun("(function(o){return o(49)})(obj)");
-  CHECK(!try_catch.HasCaught());
-  CHECK_EQ(49, value->Int32Value());
+    value = CompileRun("(function(o){return o(49)})(obj)");
+    CHECK(!try_catch.HasCaught());
+    CHECK_EQ(49, value->Int32Value());
 
-  // test special case of call as function
-  value = CompileRun("[obj]['0'](45)");
-  CHECK(!try_catch.HasCaught());
-  CHECK_EQ(45, value->Int32Value());
+    // test special case of call as function
+    value = CompileRun("[obj]['0'](45)");
+    CHECK(!try_catch.HasCaught());
+    CHECK_EQ(45, value->Int32Value());
 
-  value = CompileRun("obj.call = Function.prototype.call;"
-                     "obj.call(null, 87)");
-  CHECK(!try_catch.HasCaught());
-  CHECK_EQ(87, value->Int32Value());
+    value = CompileRun("obj.call = Function.prototype.call;"
+                       "obj.call(null, 87)");
+    CHECK(!try_catch.HasCaught());
+    CHECK_EQ(87, value->Int32Value());
 
-  // Regression tests for bug #1116356: Calling call through call/apply
-  // must work for non-function receivers.
-  const char* apply_99 = "Function.prototype.call.apply(obj, [this, 99])";
-  value = CompileRun(apply_99);
-  CHECK(!try_catch.HasCaught());
-  CHECK_EQ(99, value->Int32Value());
+    // Regression tests for bug #1116356: Calling call through call/apply
+    // must work for non-function receivers.
+    const char* apply_99 = "Function.prototype.call.apply(obj, [this, 99])";
+    value = CompileRun(apply_99);
+    CHECK(!try_catch.HasCaught());
+    CHECK_EQ(99, value->Int32Value());
 
-  const char* call_17 = "Function.prototype.call.call(obj, this, 17)";
-  value = CompileRun(call_17);
-  CHECK(!try_catch.HasCaught());
-  CHECK_EQ(17, value->Int32Value());
+    const char* call_17 = "Function.prototype.call.call(obj, this, 17)";
+    value = CompileRun(call_17);
+    CHECK(!try_catch.HasCaught());
+    CHECK_EQ(17, value->Int32Value());
 
-  // Check that the call-as-function handler can be called through
-  // new.
-  value = CompileRun("new obj(43)");
-  CHECK(!try_catch.HasCaught());
-  CHECK_EQ(-43, value->Int32Value());
+    // Check that the call-as-function handler can be called through
+    // new.
+    value = CompileRun("new obj(43)");
+    CHECK(!try_catch.HasCaught());
+    CHECK_EQ(-43, value->Int32Value());
+
+    // Check that the call-as-function handler can be called through
+    // the API.
+    v8::Handle<Value> args[] = { v8_num(28) };
+    value = instance->CallAsFunction(instance, 1, args);
+    CHECK(!try_catch.HasCaught());
+    CHECK_EQ(28, value->Int32Value());
+  }
+
+  { Local<v8::FunctionTemplate> t = v8::FunctionTemplate::New();
+    Local<ObjectTemplate> instance_template = t->InstanceTemplate();
+    Local<v8::Object> instance = t->GetFunction()->NewInstance();
+    context->Global()->Set(v8_str("obj2"), instance);
+    v8::TryCatch try_catch;
+    Local<Value> value;
+    CHECK(!try_catch.HasCaught());
+
+    // Call an object without call-as-function handler through the JS
+    value = CompileRun("obj2(28)");
+    CHECK(value.IsEmpty());
+    CHECK(try_catch.HasCaught());
+    String::AsciiValue exception_value1(try_catch.Exception());
+    CHECK_EQ(*exception_value1,
+        "TypeError: Property 'obj2' of object #<Object> is not a function");

[Mads Ager (chromium), 2011/05/04 09:28:54]

Instead of checking the actual text here I think we should just check that it is
a type error.

+    try_catch.Reset();
+
+    // Call an object without call-as-function handler through the API
+    value = CompileRun("obj2(28)");
+    v8::Handle<Value> args[] = { v8_num(28) };
+    value = instance->CallAsFunction(instance, 1, args);
+    CHECK(value.IsEmpty());
+    CHECK(try_catch.HasCaught());
+    String::AsciiValue exception_value2(try_catch.Exception());
+    CHECK_EQ(*exception_value2, "TypeError: [object Object] is not a function");

[Mads Ager (chromium), 2011/05/04 09:28:54]

Same here.

+    try_catch.Reset();
+  }
+
+  { Local<v8::FunctionTemplate> t = v8::FunctionTemplate::New();
+    Local<ObjectTemplate> instance_template = t->InstanceTemplate();
+    instance_template->SetCallAsFunctionHandler(ThrowValue);
+    Local<v8::Object> instance = t->GetFunction()->NewInstance();
+    context->Global()->Set(v8_str("obj3"), instance);
+    v8::TryCatch try_catch;
+    Local<Value> value;
+    CHECK(!try_catch.HasCaught());
+
+    // Catch the exception which is thrown by call-as-function handler
+    value = CompileRun("obj3(22)");
+    CHECK(try_catch.HasCaught());
+    String::AsciiValue exception_value1(try_catch.Exception());
+    CHECK_EQ(*exception_value1, "22");
+    try_catch.Reset();
+
+    v8::Handle<Value> args[] = { v8_num(23) };
+    value = instance->CallAsFunction(instance, 1, args);
+    CHECK(try_catch.HasCaught());
+    String::AsciiValue exception_value2(try_catch.Exception());
+    CHECK_EQ(*exception_value2, "23");
+    try_catch.Reset();
+  }
 }
 
 
 static int CountHandles() {
   return v8::HandleScope::NumberOfHandles();
 }
 
 
 static int Recurse(int depth, int iterations) {
   v8::HandleScope scope;
@@ skipping 7073 matching lines @@
 
   // Disallow but setting a global callback that will allow the calls.
   context->AllowCodeGenerationFromStrings(false);
   V8::SetAllowCodeGenerationFromStringsCallback(&CodeGenerationAllowed);
   CheckCodeGenerationAllowed();
 
   // Set a callback that disallows the code generation.
   V8::SetAllowCodeGenerationFromStringsCallback(&CodeGenerationDisallowed);
   CheckCodeGenerationDisallowed();
 }