IE 11 has native Map/Set, but it takes an optional *function*, no…

…t an optional iterable, in the constructor. (wtf?)
paulmillr · May 29, 2015 · 0ad74b6 · 0ad74b6
1 parent cf2558a
commit 0ad74b6
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/test/collections.js b/test/collections.js
@@ -108,7 +108,9 @@ describe('Collections', function () {
     it('should accept an iterable as argument', function () {
       testMapping(map, 'a', 'b');
       testMapping(map, 'c', 'd');
-      var map2 = new Map(map);
+      var map2;
+      expect(function () { map2 = new Map(map); }).not.to['throw'](Error);
+      expect(map2).to.be.an.instanceOf(Map);
       expect(map2.has('a')).to.equal(true);
       expect(map2.has('c')).to.equal(true);
       expect(map2).to.have.entries([['a', 'b'], ['c', 'd']]);