| Test EventSource constructor functionality. Should print a series of PASS messages followed by DONE. | |
| PASS: missing argument to EventSource constructor resulted in an exception (TypeError: Not enough arguments) | |
| PASS: passing an empty string to the EventSource constructor resulted in an exception (Error: SYNTAX_ERR: DOM Exception 12) | |
| PASS: passing an invalid URL to the EventSource constructor resulted in an exception (Error: SYNTAX_ERR: DOM Exception 12) | |
| DONE | |