Basic test of setting Oscillator node types.

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

PASS Oscillator correctly set to SINE type.
PASS Oscillator correctly set to SQUARE type.
PASS Oscillator correctly set to SAWTOOTH type.
PASS Oscillator correctly set to TRIANGLE type.
PASS Oscillator correctly set to CUSTOM type using setPeriodicWave.
PASS Directly setting oscillator type to custom correctly throws exception.
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