Destructuring/default tests for generators and async functions

test/mjsunit/es6/default-parameters.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.
 
 
 (function TestDefaults() {
   function f1(x = 1) { return x }
   assertEquals(1, f1());
   assertEquals(1, f1(undefined));
   assertEquals(2, f1(2));
@@ skipping 332 matching lines @@
    assertEquals(2, (function(x, y, z = 1, ...a) {}).length);
    assertEquals(1, (function(x, y = 1, z) {}).length);
    assertEquals(1, (function(x, y = 1, z, ...a) {}).length);
    assertEquals(1, (function(x, y = 1, z, v = 2) {}).length);
    assertEquals(1, (function(x, y = 1, z, v = 2, ...a) {}).length);
 })();
 
 (function TestDirectiveThrows() {
   "use strict";
 
-  assertThrows(function(){ eval("function(x=1){'use strict';}") }, SyntaxError);
-  assertThrows(function(){ eval("(x=1) => {'use strict';}") }, SyntaxError);
-  assertThrows(
-    function(){ eval("(class{foo(x=1) {'use strict';}});") }, SyntaxError);
+  assertThrows("(function(x=1){'use strict';})", SyntaxError);
+  assertThrows("(x=1) => {'use strict';}", SyntaxError);
+  assertThrows("(class{foo(x=1) {'use strict';}});", SyntaxError);
 
-  assertThrows(
-    function(){ eval("function(a, x=1){'use strict';}") }, SyntaxError);
-  assertThrows(function(){ eval("(a, x=1) => {'use strict';}") }, SyntaxError);
-  assertThrows(
-    function(){ eval("(class{foo(a, x=1) {'use strict';}});") }, SyntaxError);
+  assertThrows("(function(a, x=1){'use strict';})", SyntaxError);
+  assertThrows("(a, x=1) => {'use strict';}", SyntaxError);
+  assertThrows("(class{foo(a, x=1) {'use strict';}});", SyntaxError);
+
+  assertThrows("(function({x}){'use strict';})", SyntaxError);
+  assertThrows("({x}) => {'use strict';}", SyntaxError);
+  assertThrows("(class{foo({x}) {'use strict';}});", SyntaxError);
 })();