reducer-tester


> reducer tester

See how-to-test-reducers

Install

``
$ yarn add --dev reducer-tester
`

Usage

`js
// reducer.js
export const initialState = { count: 0, other: 'other' }

export default (state = initialState, action) => {
switch (action.type) {
case 'inc':
return { ...state, count: state.count + 1 }
case 'dec':
return { ...state, count: state.count - 1 }
default:
return state
}
}

// reducer.test.js
import reducerTester from 'reducer-tester'
import reducer, { initialState } from './reducer'

reducerTester({
reducer,
state: initialState,
tests: [{ type: 'inc' }, { type: 'dec' }],
})
`

$3

`diff
// Jest Snapshot v1, https://goo.gl/fbAQLP

exports[handle initial state 1] =
"Snapshot Diff:
Compared values have no visual difference."
;

exports[dec 1] =
"Snapshot Diff:
- Before
+ After

Object {
- "count": 0,
+ "count": -1,
"other": "other",
}"
;

exports[inc 1] =
"Snapshot Diff:
- Before
+ After

Object {
- "count": 0,
+ "count": 1,
"other": "other",
}
;
`

Full example

`js
import reducerTester from 'reducer-tester'
import reducer, { initialState } from './reducer'

reducerTester({
reducer, // #required
state: initialState, // #required
tests: [{ type: 'inc' }, { type: 'dec' }], // #required
initialTest: false, // # optional, default: true
titlePrefix: 'handle ', // # optional, default: ''
})
`

`diff
// Jest Snapshot v1, https://goo.gl/fbAQLP

exports[handle dec 1] =
"Snapshot Diff:
- Before
+ After

Object {
- "count: 0,
+ count: -1,
}
;

exports[handle inc 1] =
"Snapshot Diff:
- Before
+ After

Object {
- count: 0,
+ count: 1,
}
;
`

$3

#### Atom Editor User

Install language-diff and file-types. And open config.json and edit as blow.

`cson
"*":
"file-types":
"\\.js\\.snap$": "source.diff"
``

Hooray! Very readable!

!68747470733a2f2f71696974612d696d6167652d73746f72652e73332e616d617a6f6e6177732e636f6d2f302f31353331392f64666537363137312d323735322d646265302d613038652d6330633436646330396264662e706e67 (495×575)

Contributors

Thanks goes to these wonderful people (emoji key):

akameco 💻 📖 ⚠️ 🚇

Ahn Dohyung 📖

kinakobo 📖

This project follows the all-contributors specification. Contributions of any kind welcome!

License

MIT © akameco