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What does "assertion" mean in programming?
assertion is one of the most common terms in software development. This guide explains what it means, how it is used in practice, and why it matters, with real examples from the developer world.
Definition
A statement in a test that checks whether a condition is true. If the assertion fails, the test fails. Assertions express the expected behavior of the code under test.
Example
"Add an assertion to verify that the function returns 404 when the user does not exist."
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