Glossary
The testing pyramid is a model for balancing many focused lower-level tests with fewer broad end-to-end tests. It emphasizes placing checks at a useful level rather than forcing every assertion through the UI.
Browser tests exercise complete journeys but also depend on more systems. A balanced suite can make failures easier to locate while retaining coverage of the real user flow.
Teams use unit tests for isolated logic, integration tests for boundaries and browser tests for a deliberate set of customer journeys. The exact balance depends on the application.
Zerocheck fits the browser end-to-end layer. Use it for flows your team otherwise checks by hand, alongside unit and integration tests. It does not replace API-only, security, performance or native-mobile testing.