Loiane Groner • 12/16/2025

Angular v21 and the End of TS-Only Test Coverage: Why We Must Rethink Component Testing

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Angular v21 replaces Jasmine/Karma with Vitest as the default, a change that now includes HTML template logic in test coverage reports. This article explains why this ends the era of TypeScript-only coverage, the impact of using protected members for template bindings, and how developers must adapt by testing through the template rather than directly accessing component internals.

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#testing #component testing #test coverage
Angular v21 and the End of TS-Only Test Coverage: Why We Must Rethink Component Testing

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