PASS 'use strict'; var s = str(); s.length = 1; s.length threw exception of type TypeError. PASS var s = str(); s.length = 1; s.length is 3 PASS true === true PASS 'use strict'; var s = str(); delete s.length threw exception of type TypeError. PASS var s = str(); delete s.length is false PASS true === true PASS 'use strict'; "foo".length = 1 threw exception of type TypeError. PASS "foo".length = 1 is 1 PASS true === true PASS 'use strict'; delete "foo".length threw exception of type TypeError. PASS delete "foo".length is false PASS true === true PASSED! PASS successfullyParsed is true TEST COMPLETE