Preact Testing: Component Lifecycle and DOM Integration Tests
The preactjs/preact repository showcases a comprehensive testing approach focused on unit testing using Jest as the primary testing framework. The test suite contains 99 tests that thoroughly verify core functionality, component lifecycles, and DOM interactions. The tests demonstrate best practices for testing Preact components, with particular attention to DOM sibling detection, form element behaviors, and component lifecycle methods. Qodo Tests Hub provides developers with an organized view into these test implementations, making it easier to understand Preact's testing patterns and best practices. Through the platform, developers can explore real-world examples of component lifecycle testing, DOM manipulation verification, and state management validation. This practical insight helps teams adopt effective testing strategies for their own Preact applications while learning from established testing patterns.
| Path | Test Type | Language | Description |
|---|---|---|---|
| test/browser/lifecycles/componentWillUpdate.test.js |
unit
|
javascript | This Jest unit test verifies the componentWillUpdate lifecycle method behavior in Preact components during various update scenarios. |
| test/browser/mathml.test.js |
unit
|
javascript | This Jest unit test verifies MathML namespace handling and rendering functionality in Preact components. |
| test/browser/select.test.js |
unit
|
javascript | This Jest unit test verifies select element functionality and value management in Preact components. |
| test/shared/createContext.test.js |
unit
|
javascript | This Jest unit test verifies the createContext API functionality and Provider component behavior in Preact. |
| compat/test/browser/Children.test.js |
unit
|
javascript | This Jest unit test verifies React’s Children utility implementation in Preact’s compatibility layer. |
| compat/test/browser/PureComponent.test.js |
unit
|
javascript | This Jest unit test verifies PureComponent implementation in Preact’s React compatibility layer, including lifecycle methods and rendering optimization. |
| compat/test/browser/component.test.js |
unit
|
javascript | This Jest unit test verifies React component compatibility and lifecycle methods in Preact’s compat module. |
| compat/test/browser/componentDidCatch.test.js |
unit
|
javascript | This Jest unit test verifies componentDidCatch error boundary functionality in Preact’s React compatibility layer. |
| compat/test/browser/events.test.js |
unit
|
javascript | This Jest unit test verifies event handling and normalization in Preact’s React compatibility layer |
| compat/test/browser/findDOMNode.test.js |
unit
|
javascript | This Jest unit test verifies findDOMNode compatibility between Preact and React implementations for DOM node retrieval and null handling. |