What is Automation Testing?

What is automation testing?

Automation testing is the practice of using software and tools to run tests automatically, rather than a person executing them by hand each time. Automated tests can run on every commit, in a CI/CD pipeline, giving developers immediate feedback on whether a change works and whether it broke anything else.

The goal is not to replace human judgement but to remove the slow, repetitive work of re-checking known behaviour, so the team can release frequently without sacrificing confidence in the software.

The main types of software tests

Software testing works at several levels, each with a different scope. Unit testing targets the smallest components of the software, individual functions or procedures, and is usually written by developers, for example a test for a function that sums an array of numbers. Integration testing checks how different units work together, such as the interaction between a database layer and a business-logic layer, and is typically handled by a developer or tester.

System testing then evaluates the software as a whole against its specified requirements, often run by a dedicated tester or QA team under normal, load, and stress conditions. Finally, acceptance testing verifies the system against user requirements to confirm it meets real needs, and is carried out by clients, end-users, or stakeholders, for example testing the full checkout flow of an e-commerce site.

The testing pyramid

The testing pyramid is a simple guide for how to balance these test types. At the base sit many fast, cheap unit tests, because they pinpoint problems precisely and run in milliseconds. In the middle are fewer integration tests that check how components fit together, and at the top are a small number of end-to-end or acceptance tests that exercise the whole system.

The shape matters: relying on a few slow, broad tests makes failures hard to diagnose and pipelines slow, while a broad base of unit tests catches most issues early and cheaply. Following the pyramid keeps your test suite both fast and trustworthy.

Why automation testing matters for Agile and CI/CD

Agile and CI/CD depend on shipping small changes frequently, and that is only safe when each change is verified automatically. Automated tests give fast feedback on the health of the codebase, catch regressions before they reach production, and keep the main branch in a releasable state, which is exactly what continuous integration requires.

They also make change less scary. A solid automated suite acts as a safety net that lets developers refactor and add features with confidence, knowing that any broken behaviour will be flagged immediately. That is what allows a team to move quickly without accumulating risk.

How 8grams approaches automation testing

At 8grams, we build automated testing into our clients' pipelines, from unit tests on every commit to integration and end-to-end checks before release. Combined with CI/CD and trunk-based development, it keeps the codebase releasable and lets teams ship quickly with confidence.