1 Test EventSource reconnect after end of event stream.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS es.readyState is es.CONNECTING
7 PASS es.readyState is es.OPEN
8 PASS evt.lastEventId is "77☃"
9 PASS es.readyState is es.CONNECTING
10 PASS es.readyState is es.OPEN
11 PASS evt.data is "77☃"
12 PASS evt.lastEventId is "77☃"
13 PASS es.readyState is es.CLOSED
14 PASS successfullyParsed is true