testing-library/jest-dom
Jest Dom
jest-dom ist eine Sammlung benutzerdefinierter Matcher und Assertions für Jest, die darauf ausgelegt sind, HTML-Elementzustände, Barrierefreiheit und DOM-Eigenschaften zu validieren. Es fungiert als spezialisiertes Toolkit zur Überprüfung des strukturellen und visuellen Zustands von Webelementen während automatisierter Tests.
Die Bibliothek bietet spezialisierte Funktionen zur Überprüfung von CSS-Klassen, Attributen und Formularvalidität. Sie enthält eine Suite von Assertions zur Überprüfung von ARIA-Rollen, zugänglichen Namen und der Kompatibilität mit assistiven Technologien.
Die Funktionen decken die Überprüfung von Elementpräsenz, Sichtbarkeit und Positionierung innerhalb der Dokumentenhierarchie ab. Zudem enthält sie Dienstprogramme zur Validierung von Webformularzuständen, einschließlich Eingabewerten, Validitätsanforderungen und interaktiven Zuständen wie Fokus und Textauswahl.
Features
- DOM Testing Utilities - Offers a comprehensive toolkit for validating the accessibility, visibility, and structural properties of web elements.
- DOM Matchers - Extends the Jest test runner with a comprehensive collection of specialized matchers for DOM state verification.
- DOM Presence Verifications - Provides matchers to assert whether an element exists in the DOM or within a specific container.
- Accessibility Testing - Evaluates software interfaces to ensure they meet accessibility standards and are readable by assistive technologies.
- DOM Content Assertions - Offers assertions to verify that elements contain specific text or HTML content.
- Element State Verifications - Provides matchers to check HTML attributes, CSS classes, and applied styles to confirm an element's structural state.
- Custom Matchers - Ships specialized matchers for asserting CSS classes, attributes, and form validity in JavaScript tests.
- Accessible Attribute Verifications - Provides specialized matchers to verify accessible names, roles, and descriptions for assistive technology compatibility.
- Accessibility Validation Utilities - Provides a suite of assertions for verifying ARIA roles and accessibility standards within the browser DOM.
- UI State Verifications - Validates that the UI has reached the expected state by checking element properties like focus, visibility, and disabled status.
- ARIA Attribute Validations - Implements assertions to ensure elements comply with WAI-ARIA standards for assistive technologies.
- Element Property Inspection - Enables programmatic inspection of DOM properties and attributes to verify the current state of web elements.
- Input State Verifications - Verifies internal states of form controls, including focus, validity, and user text selections.
- Form Validity Assertions - Checks whether a form element is currently valid, invalid, or marked as required.
- Form Value Assertions - Provides matchers to assert the values of individual form controls or entire fieldsets.
- DOM Hierarchy Navigators - Provides utilities to navigate the DOM hierarchy to verify parent-child relationships and element positioning.
- DOM Structure Verification - Ensures the generated HTML structure matches expected patterns and hierarchical relationships.
- Relative Positioning Verifications - Determines if an element appears before or after another specific element in the document hierarchy.
- Web Form Test Assertions - Provides matchers to check that input fields and form elements have correct values and validity states.
- Form Value Display Verifications - Verifies the actual value displayed to the end user for various supported form elements.
- Computed Style Analyzers - Analyzes resolved CSS values via the browser's computed style API to determine element visibility and layout.
- Testing and Quality Assurance - Custom matchers for testing the state of the DOM.
