A test stub is a test double that provides static values to the software under test.
A test stub provides canned answers to calls made during the test, usually not responding at all to anything outside what's programmed in for the test.[1]
A stub may be coded by hand, generated via a tool or be created as a dedicated part of a larger system such as a stub server or service.
Stubs differ from, which assert and verify interactions. Stubs only supply data.[2] [3]
