Testing

n.
  1. The act of testing or proving; trial; proof.
  2. (Metal.) The operation of refining gold or silver in a test, or cupel; cupellation.
    3. Testing machine (Engin.),
    a machine used in the determination of the strength of materials, as iron, stone, etc., and their behavior under strains of various kinds, as elongation, bending, crushing, etc.