This test case verifies that session storage only stores strings.
Length is 0
Testing implicit setters
Type/value for null is string/null
Type/value for 0 is string/0
Type/value for function(){} is string/function () {}
Testing explicit setters
Type/value for null is string/null
Type/value for 0 is string/0
Type/value for function(){} is string/function () {}
Testing index setters
Type/value for null is string/null
Type/value for 0 is string/0
Type/value for function(){} is string/function () {}