lecture 9 of 160 completed

Component testing, and where the boundary sits

Cypress can mount a component directly. The senior question is not how, but which tests belong there instead of in E2E.

What you'll learn

Which tests belong at component level instead of end to end
The boundary rule, in one sentence
How to migrate a slow suite without losing coverage

Picture a suite with 180 end-to-end tests for form validation. Each one logs in, navigates to a form, types an invalid value, and checks the error message. The suite takes fifty minutes and most of it is this.

Every one of those tests was checking a component. None of them needed a login, a database, or a page.

Cypress component testing mounts a single component in a real browser, without your application around it:

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Keep reading with the full course

The Foundations track and the first 5 lectures of each framework are free. This lecture is part of the paid course, which unlocks every lecture, all three frameworks, and downloads.

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