The datasheet for a component will tell you something about test parameters and how something is tested both parametrically and by waveform. Looking at a site like partagent (I'm thinking irfanengtips is a plant from partagent!) ain't gonna help you AT ALL except perhaps by getting you the datasheet.
Partagent IN PARTICULAR will not help BEYOND getting you the datasheet because RNTD DOES NOT COVER TEST PROPERTIES!!! I.e., you CAN NOT search for a part BASED on test conditions via the RNTD (which partagent claims to be based on - see my other post on RNTD). That's currently an issue on the table.
Failing the datasheet, read the long history (40 years?) of International Test Conference proceedings at your local technical library(!) or talk to a test engineer. There's also at least one relevant usenet news group (name escapes me now and laziness sets in).