Checks incomplete datetime formats are rejected.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".

Valid format
PASS getUserAgentShadowTextContent(input) is "07-1999"
Invalid format, fallback to yyyy-MM
PASS getUserAgentShadowTextContent(input) is "1999-07"
PASS getUserAgentShadowTextContent(input) is "1999-07"
PASS successfullyParsed is true

TEST COMPLETE