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redux-test-reducer

redux-test-reducer is a simple module that allows you to cleanly test your Redux reducers.

Installation

$ npm install --save-dev redux-test-reducer

Usage

This package works with any JavaScript testing framework. Here's an example with Mocha:

var testReducer = require('redux-test-reducer');

// Simple counter reducer from the redux docs
var reducer = function(state, action) {
  if (action.type === 'INCREMENT') {
    return state + 1;
  } else if (action.type === 'DECREMENT') {
    return state - 1;
  } else {
    return state;
  }
}

// Load the reducer to create an assertion function
var assertReducer = testReducer(reducer);

describe('#reducer', function() {
  it('can increment', function() {
    assertReducer({
      from: 0,
      to: 1,
      action: { type: 'INCREMENT' }
    });
  });

  it('can decrement', function() {
    assertReducer({
      from: 2,
      to: 1,
      action: { type: 'DECREMENT' }
    });
  });
});

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new pull request