I don't know however I would recommend that you get one from an external source in advance because you don't want to show up the day of your flight and find out that they ran out of tests or something.
Not quite sure I needed one because I traveled to St. Lucia..
This is a national airport, and tests are only required for international travel, so I don't believe they offer it, no. When I was there two different times last week, there was no mention of it
I came in a Sunday morning, so I didn't see anyone offering a test. However I did see people giving information at Laquadia airport about the vaccines on Friday morning.
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