[es6] add SetFunctionName() behaviour to AssignmentExpression

test/mjsunit/harmony/function-name.js

 // 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-function-name
 
 (function testVariableDeclarationsFunction() {
   'use strict';
   var a = function(){};
   assertEquals('a', a.name);
@@ skipping 102 matching lines @@
     static [sym2]() { }
   }
 
   // Should be 'a'
   assertEquals('', C.prototype[a].name);
   // Should be '[1]'
   assertEquals('', C.prototype[sym1].name);
   // Should be '[2]'
   assertEquals('', C[sym2].name);
 })();
+
+
+(function testAssignment() {
+  var basicFn, arrowFn, generatorFn, classLit;
+
+  basicFn = function() { return true; };

[adamk, 2016/01/13 22:45:09]

Please also add a case where the function has a name (and show that it's not
overwritten).

[caitp (gmail), 2016/01/13 22:53:46]

Done.

+  assertEquals('basicFn', basicFn.name);
+  var basicFn2 = basicFn;
+  assertEquals('basicFn', basicFn2.name);
+
+  arrowFn = x => x;
+  assertEquals('arrowFn', arrowFn.name);
+  var arrowFn2 = arrowFn;
+  assertEquals('arrowFn', arrowFn2.name);
+
+  generatorFn = function*() { yield true; };
+  assertEquals('generatorFn', generatorFn.name);
+  var generatorFn2 = generatorFn;
+  assertEquals('generatorFn', generatorFn2.name);
+
+  classLit = class { constructor() {} };

[adamk, 2016/01/13 22:45:09]

Can you also add a case where the class is named, and one where it has a static
"name" method?

[caitp (gmail), 2016/01/13 22:53:46]

Done.

+  assertEquals('classLit', classLit.name);
+  var classLit2 = classLit;
+  assertEquals('classLit', classLit2.name);
+})();