jestjs/jest

[Feature]: Detect unused stubs in test code

Open

#12 296 ouverte le 3 févr. 2022

Voir sur GitHub
 (13 commentaires) (10 réactions) (0 assignés)TypeScript (45 361 stars) (6 653 forks)batch import
:rocket: Feature RequestHelp WantedPinned

Description

🚀 Feature Proposal

As described in this article, JUnit and Mockito support detecting unnecessary stubs and tell the user to remove them. It would be great to have that feature in Jest.

Motivation

Removing unused stubs makes the test code cleaner and more maintainable.

Example

No response

Pitch

Removing unused stubs makes the test code cleaner and more maintainable. This leads to users writing cleaner and more delightful tests and prevents certain errors from happening when users expect their stubs to be responsible for a specific behavior when actually they have never been called.

Guide contributeur

Stack technique
jesttypescriptjavascript
Domaine
testingdeveloper experience
Type d'issue
feature
DifficultéDifficulté estimée pour un nouveau contributeur, de 1 pour un très petit changement à 5 pour un travail expert.
3
Temps estiméFourchette de temps approximative pour investiguer, implémenter, tester et préparer une pull request.
3-5 days
Statut d'activitéDisponibilité apparente de l'issue : fraîche, active, ancienne, bloquée ou en attente d'un mainteneur.
stale
ClartéClarté avec laquelle l'issue explique le changement attendu, les critères d'acceptation et la prochaine étape.
clear
Prérequis
Understanding of Jest test structureBasics of mocking
Accessibilité débutantScore de 1 à 100 estimant l'accessibilité de cette issue pour un premier contributeur.
35
Direction de recherche
Investigate how Jest currently handles stubs (mock functions) and where they are tracked. Look at the Jest source code, particularly packages/jest core and packages/jest runtime. Consider how an unnecessary stub detection mechanism could be added, similar to Mockito's UnnecessaryStubbingException. The issue references a Baeldung article for inspiration, so reviewing that may provide implementation ideas.