Array.prototype.{every, filter, find, findIndex, forEach, map, some}: Use fresh primitive wrapper f…

test/mjsunit/harmony/array-findindex.js

Index: test/mjsunit/harmony/array-findindex.js
diff --git a/test/mjsunit/harmony/array-findindex.js b/test/mjsunit/harmony/array-findindex.js
index a33849dab393afd1f233bd9ec5461d0c489e794a..1a4ed5865c2be04ec6edc8a8c9c35d4ea1e296d2 100644
--- a/test/mjsunit/harmony/array-findindex.js
+++ b/test/mjsunit/harmony/array-findindex.js
@@ -237,6 +237,24 @@ assertEquals(3, a.findIndex(function(val) { return 24 === val; }));
     return this.elementAt(key) === val;
   }, thisArg);
   assertEquals(1, index);
+
+  // When evaluating 'this', primitive values should be coerced to an object.
+  // See ECMA-262, Annex C.
+  a = [];
+  [1, 2].findIndex(function() { a.push(this) }, "");
+  assertTrue(a[0] !== a[1]);
+
+  // When evaluating 'this', non-primitive values are not coerced to an object.
+  a = [];
+  [1, 2].findIndex(function() { a.push(this) }, {});
+  assertFalse(a[0] !== a[1]);
+
+  // In strict mode, when evaluating 'this', primitive values should not be
+  // coerced to an object.
+  a = [];
+  [1, 2].findIndex(function() { 'use strict'; a.push(this); }, "");
+  assertTrue(a[0] === "" && a[0] === a[1]);
+
 })();
 
 // Test exceptions