Test Harness

General

// Definition

The infrastructure that runs tests — the framework, runners, fixtures, mocks, and reporting tools that make tests executable and observable.

// Related terms

Test Suite
A collection of related test cases organised for execution together — usually grouped by feature, layer (unit, integration, e2e), or test type (smoke, regression).
Test Fixture
A known, fixed state used as a baseline for tests — sample data, a seeded database, or a configured environment that ensures repeatability across runs.
Assertion
A statement in a test that checks an expected condition holds. If it doesn't, the test fails. The core of every automated test.

Learn more · Core Java for QA

Chapter 9 · Lesson 2: Guided Walkthrough — OOP Design, Collections, File I/O, and Error Handling