Basic tests for BiquadFilterNode.

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

PASS BiquadFilterNode has one input.
PASS BiquadFilterNode has one output.
PASS Biquad filter defaults to low-pass filter.
PASS The default value of frequency is 350.
PASS The default value of Q is 1.
PASS The default value of gain is 0.
PASS Biquad filter type 'lowpass' is settable.
PASS Biquad filter type 'highpass' is settable.
PASS Biquad filter type 'bandpass' is settable.
PASS Biquad filter type 'lowshelf' is settable.
PASS Biquad filter type 'highshelf' is settable.
PASS Biquad filter type 'peaking' is settable.
PASS Biquad filter type 'notch' is settable.
PASS Biquad filter type 'allpass' is settable.
PASS Setting .type to illegal string value did not throw an exception.
PASS Setting .type to illegal type did not throw an exception.
PASS successfullyParsed is true

TEST COMPLETE