/js/src/jit-test/tests/basic/testThinForEach.js

 1function testThinForEach() {
 2    var a = ["red"];
 3    var n = 0;
 4    for (var i = 0; i < 10; i++)
 5        for each (var v in a)
 6            if (v)
 7                n++;
 8    return n;
 9}
10assertEq(testThinForEach(), 10);