The phrase "a test of first" is not correct in written English.
It seems to be an incomplete or incorrect expression, possibly intended to convey a concept related to testing or evaluation.
Example: "The project will serve as a test of first for our new methodology."
Alternatives: "a preliminary test" or "an initial assessment".
Yet the latest round of a dispute over rights to a block of prime downtown land is almost certain to reach the United States Supreme Court in a test of First Amendment rights that also touches on the separation of church and state.
At the same time that the case has been exhaustively examined online, few traditional, that is, offline, outlets have taken up the Manning prosecution as a test of First Amendment principles, a challenge to the free flow of information needed by the public trying to evaluate the conduct of the war in Iraq.
A test of fourth grade reading tests fourth grade reading.
In September, a U.S. Department of Energy facility successfully completed a test of the first U.S.-built superconducting radio frequency niobium cavity intended to become part of the prototype accelerator at Fermilab.
Since then, the school has posted several videos from all three movies, including production of the first movie's spitting dilophosaurus and a test of the third movie's Pteranodon suit.
In a move that legal experts said could present a major test of First Amendment rights in the Internet era, a federal judge in San Francisco on Friday ordered the disabling of a Web site devoted to disclosing confidential information.
This is a test of a hypothesis first made by Benjamin Lee Whorf, an early 20th-century American linguist, that the structure of language affects the way people think.
The struggle now looms as a test of Mr. Blair's second-term priority -- restoring Britain's battered public services.
The fly is a test of gross stereopsis (3000 seconds of arc).
The imprint, Clarke's first, is a test of sorts for the veteran artist.
It's a test of will and principle," Obama's first White House press secretary, Jay Carney, tweeted Thursday morning.
