What is Test stub?

1.	What is Test stub?
Answer» In Agile, a test stub is a small piece of code (modules) that simulates an component/element in the system being tested and can replace it. Top-down integration testing often involves the use of stubs to simulate or mimic the behavior of lower-level modules that have not been integrated. Stubs are temporary replacements for a called module, and produce the same output as the actual product.

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