Test equal-power panner model of AudioPannerNode.

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

PASS Number of impulses matches the number of panner nodes.
PASS All impulses at expected offsets.
PASS Left channel gain values are correct.
PASS Right channel gain values are correct.
PASS EqualPower panner test passed
PASS successfullyParsed is true

TEST COMPLETE