add Object#toString.toString as fallback for lodash, lodash/lodash#1197

zloirock · May 11, 2015 · 136130f · 136130f
1 parent 0c28267
commit 136130f
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Showing 4 changed files with 22 additions and 7 deletions.
diff --git a/library/modules/es6.object.to-string.js b/library/modules/es6.object.to-string.js
@@ -2,8 +2,14 @@
 // 19.1.3.6 Object.prototype.toString()
 var $   = require('./$')
   , cof = require('./$.cof')
+  , src = String({}.toString)
   , tmp = {};
-tmp[require('./$.wks')('toStringTag')] = 'z';
-if($.FW && cof(tmp) != 'z')$.hide(Object.prototype, 'toString', function toString(){
+function toString(){
   return '[object ' + cof.classof(this) + ']';
-});
+}
+// lodash uses String(Object.prototype.toString) in isNative
+toString.toString = function(){
+  return src;
+};
+tmp[require('./$.wks')('toStringTag')] = 'z';
+if($.FW && cof(tmp) != 'z')$.hide(Object.prototype, 'toString', toString);
diff --git a/modules/es6.object.to-string.js b/modules/es6.object.to-string.js
@@ -2,8 +2,14 @@
 // 19.1.3.6 Object.prototype.toString()
 var $   = require('./$')
   , cof = require('./$.cof')
+  , src = String({}.toString)
   , tmp = {};
-tmp[require('./$.wks')('toStringTag')] = 'z';
-if($.FW && cof(tmp) != 'z')$.hide(Object.prototype, 'toString', function toString(){
+function toString(){
   return '[object ' + cof.classof(this) + ']';
-});
+}
+// lodash uses String(Object.prototype.toString) in isNative
+toString.toString = function(){
+  return src;
+};
+tmp[require('./$.wks')('toStringTag')] = 'z';
+if($.FW && cof(tmp) != 'z')$.hide(Object.prototype, 'toString', toString);
diff --git a/tests/tests.js b/tests/tests.js
diff --git a/tests/tests/es6.object.to-string.ls b/tests/tests/es6.object.to-string.ls
@@ -36,4 +36,6 @@ test 'Object#toString' !->
     eq toString.call(JSON), '[object JSON]', 'classof JSON is `JSON`'
   class Class
     @::[Symbol.toStringTag] = \Class
-  eq '' + new Class, '[object Class]', 'classof user class is [Symbol.toStringTag]'
+  eq '' + new Class, '[object Class]', 'classof user class is [Symbol.toStringTag]'
+
+  ok /native code/.test(Object::toString), 'Object#toString.toString'