What is End-to-end testing?
End-to-end testing is automated testing that runs through complete user journeys in a real or realistic environment, such as signing up, adding items to a cart and paying, to confirm every layer works together. These tests are slower and more fragile than unit tests, so teams reserve them for the most important flows.
Why it matters for your business
End-to-end tests protect the journeys that directly earn or lose money, catching integration failures that isolated tests miss before customers encounter them.
Each night, an automated browser test logs into a staging copy of a B2B portal, places a reorder and checks that the order appears in the ERP.