redux-saga-testing

Name: redux-saga-testing
Author: anivar

anivar February 23, 2026

2 copies 0 downloads

AI agent skill for testing Redux Sagas — expectSaga, testSaga, providers, Jest/Vitest. Works with Claude Code, Cursor, Codex, Windsurf.

Redux-Saga Testing

Created by Anivar Aravind

An AI agent skill for writing tests for Redux Sagas using redux-saga-test-plan. Works with Jest and Vitest.

The Problem

AI agents often write saga tests that are brittle (asserting exact effect order when it doesn't matter), miss provider setup (causing tests to hit real APIs), or use manual generator stepping when expectSaga would be simpler and more maintainable. The result: tests that break on harmless refactors and pass when they shouldn't.

This Solution

A focused testing skill covering expectSaga (integration), testSaga (unit), providers, matchers, and reducer integration — with 12 anti-patterns showing exactly what goes wrong and how to fix it.

Install

npx skills add anivar/redux-saga-testing -g

Or with full URL:

npx skills add https://github.com/anivar/redux-saga-testing

Baseline

redux-saga-test-plan ^5.x
redux-saga ^1.4.2
Jest or Vitest

What's Inside

Testing Approaches

Approach	Type	Use When
`expectSaga`	Integration	Default choice — order-independent, async, assertions on effects and state
`testSaga`	Unit	Effect ordering matters (e.g., must `select` before `call`)
`runSaga`	Manual	Need full store integration or custom middleware

Providers

Provider Type	Purpose
Static providers	Map effect → return value (simple, covers most cases)
Dynamic providers	Custom logic per effect type (conditional mocking)
Partial matchers	`matchers.call.fn(apiFn)` — match by function regardless of args

Anti-Patterns

12 common testing mistakes with BAD/GOOD code examples:

Asserting effect order in integration tests
Missing providers for API calls
Not awaiting expectSaga (test always passes)
Testing implementation instead of behavior
Ignoring error paths and cancellation

Structure

├── SKILL.md

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