test double

test double (plural test doubles)

1. (programming) An object or procedure that looks and behaves like its release-intended counterpart, but is actually a simplified version to reduce complexity and facilitate testing.
   • 2010, Ken Pugh, Lean-Agile Acceptance Test-Driven-Development‎, Pearson Education, →ISBN:

     A test double is something that stands in for a real system when tests are being run. It comes from the idea of a double who stands in for the real actor when shooting a movie.

• dummy
• fake
• mock object, mock
• spy
• stub