| XMLHttpRequest.open() should be correctly overloaded | |
| PASS: if async argument is true, send() should behave asynchronously | |
| PASS: if async argument is false, send() should behave synchronously | |
| PASS: if async argument is not given, send() should behave like as async=true | |
| PASS: if async argument is undefined, send() should behave like as async=false | |
| PASS: if async argument is a non-empty string, send() should behave like as async=true |