TLV9002-Q1: typical test waveform

That depends on what you want to test. DC characteristics use a DC signal; frequency-dependent characteristics typically use a sine wave.

This device has already been tested after manufacturing. If you want to test basic functionality afterwards, you would typically configure it as a voltage follwer and test multiple voltages or a sine wave; if you do an in-circuit test, you might be only able to test it as a comparator.