Basic tests for DynamicsCompressorNode API.

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

PASS threshold attribute has correct default value.
PASS knee attribute has correct default value.
PASS ratio attribute has correct default value.
PASS attack attribute has correct default value.
PASS release attribute has correct default value.
PASS successfullyParsed is true

TEST COMPLETE