1 Checks incomplete datetime formats are rejected.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
7 PASS getUserAgentShadowTextContent(input) is "1999-07-31 11:59 PM"
8 Invalid format, fallback to yyyy-MM-dd'T'HH:mm
9 PASS getUserAgentShadowTextContent(input) is "1999-07-31T23:59"
10 PASS getUserAgentShadowTextContent(input) is "1999-07-31T23:59"
11 PASS getUserAgentShadowTextContent(input) is "1999-07-31T23:59"
12 PASS successfullyParsed is true