Snapshot Testing

Snapshot Testing

Snapshot testing is an automated testing technique that captures the output of a piece of code — such as a rendered UI component or a data structure — and comp…

Test Coverage

Test coverage is a metric that measures the proportion of a codebase — expressed as lines, branches, functions, or statements — that is executed by an automate…

Mocking Framework

A mocking framework is a testing library that creates fake, controllable substitutes for real dependencies — such as databases, network calls, or other service…

Snapshot Testing

Understand how Jest's snapshot testing captures serialized output over time, when it's a good fit, and how to manage snapshot files responsibly.