[runtime] [proxy] Implementing [[Call]]

test/mjsunit/harmony/proxies-call.js

Index: test/mjsunit/harmony/proxies-call.js
diff --git a/test/mjsunit/harmony/proxies-call.js b/test/mjsunit/harmony/proxies-call.js
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+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-proxies --harmony-reflect
+
+(function testNonCallable() {
+  var proxy = new Proxy({},{});
+  assertThrows(function(){ proxy() }, TypeError);
+
+  var proxy2 = new Proxy(proxy, {});
+  assertThrows(function(){ proxy2() }, TypeError);
+})();
+
+(function testCallProxyFallbackNoArguments() {
+  var called = false;
+  var target = function() {
+    called = true;
+  }
+  var proxy = new Proxy(target, {});
+  assertFalse(called);
+  proxy();
+  assertTrue(called);
+
+  called = false;
+  var proxy2 = new Proxy(proxy, {});
+  assertFalse(called);
+  proxy2();
+  assertTrue(called);
+})();
+
+(function testCallProxyFallback1Argument() {
+  var called = false;
+  var target = function(a) {
+    called = true;
+    assertEquals('1', a);
+  }
+  var proxy = new Proxy(target, {});
+  assertFalse(called);
+  proxy('1');
+  assertTrue(called);
+})();
+
+(function testCallProxyFallback2Arguments() {
+  var called = false;
+  var target = function(a, b) {
+    called = true;
+    assertEquals('1', a);
+    assertEquals('2', b);
+  }
+  var proxy = new Proxy(target, {});
+  assertFalse(called);
+  proxy('1', '2');
+  assertTrue(called);
+})();
+
+(function testCallProxyFallbackChangedReceiver() {
+  var apply_receiver = {receiver:true};
+  var seen_receiver = undefined;
+  var target = function() {
+    seen_receiver  = this;

[Jakob Kummerow, 2015/12/07 15:55:08]

super-nit: s/  / /

+  }
+  var proxy = new Proxy(target, {});
+  assertEquals(undefined, seen_receiver);
+  Reflect.apply(proxy, apply_receiver , [1,2,3,4]);

[Jakob Kummerow, 2015/12/07 15:55:08]

nit: s/ ,/,/

+  assertSame(apply_receiver, seen_receiver);
+})();
+
+(function testCallProxyTrap() {
+  var called = false;
+  var target = function(a, b) {
+    called = true;
+    assertEquals(1, a);
+    assertEquals(2, b);
+  }
+  var handler = {
+    apply : function(target, this_arg, args) {
+      target.apply(this_arg, args);

[Jakob Kummerow, 2015/12/07 15:55:08]

You probably want to check that this, too, was called (as opposed to the
existing trap being ignored). Maybe turn |called| into a counter, put "called +=
10" and "called += 1" into |target| and |handler.apply| respectively, and then
assertEquals(11, called).

[Camillo Bruni, 2015/12/07 16:54:10]

added called_target and called_handler

+    }
+  }
+  var proxy = new Proxy(target, handler);
+  assertFalse(called);
+  Reflect.apply(proxy, {rec:1}, [1,2,3,4]);

[Jakob Kummerow, 2015/12/07 15:55:08]

I'd align the arguments with the assertEquals() in |target|. Either pass in only
[1, 2], or check all four.

[Camillo Bruni, 2015/12/07 16:54:10]

right.

+  assertTrue(called);
+})();