vite-plugin-mock-simple

Provide local mocks for Vite to consume them in your app when running development-server. This is a heavy modified fork of vite-plugin-mock-server by octoape licensed under the MIT-License. Forked to provide a simple vite-mock library.

A mock server plugin for Vite, developed based on TypeScript. And support using TypeScript and JavaScript to write Mock API. When the Mock API file is modified, it will be hot updated automatically. Zero Dependency

Install

node version: >=12.0.0

vite version: >=2.0.0

# if using npm
npm i vite-plugin-mock-simple -D
# if using yarn
yarn add vite-plugin-mock-simple -D

Usage

Config plugin in vite.config.ts and add an array of mocks

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import mockArray from './mockRoutes'

export default defineConfig({
  plugins: [
    vue(),
    mockSimple(mockArray)
  ]
})

Or just fill the mocks in the config file

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import mockSimple, { MockHandler } from 'vite-plugin-mock-simple'

export default defineConfig({
  plugins: [
    vue(),
    mockSimple([
      {
        pattern: '/api/test1/1',
        handle: (req, res) => {
        res.end('Hello world!' + req.url)
      }
    } as MockHandler
    ])
  ]
})

Or import the MockHandler arrays from multiple files

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import mockSimple from 'vite-plugin-mock-simple'
import routes1 from './mock/es.mock'
import routes2 from './mock/cjs.mock'
import routes3 from './mock/apis/es2.mock'
import routes4 from './mock/apis/cjs2.mock'

export default defineConfig({
  plugins: [
    vue(),
    mockSimple([...routes1, ...routes2, ...routes3(), ...routes4])
  ]
})

Mock file examples

The pattern is an ant-style path pattern string, use @howiefh/ant-path-matcher to match the pattern and request URL.

import { MockHandler } from 'vite-plugin-mock-simple'

export default [
  {
    // use method: 'GET' as default
    pattern: '/config.json',
    // Define a json-response directly, with the response-property 👌
    // in that case you cannot define the handle-property
    jsonBody: { databaseUrl: '//:firebaseio.com.', api: 'fake'}
  },
  {
    pattern: '/api/upload/1',
    // use some comma-delimetered values to generate mocks for each of these
    method: 'POST, GET, DELETE, PUT, Patch', 
    handle: (req, res) => {
      // to set an other status code than 200
      res.statusCode = 203 
      res.end('Hello world!' + req.url)
    }
  },
  {
    // optional: to give the app a more real experience
    // delay the time it takes to get the response in millisecounds.
    // 1000 => 1 secound
    delay: 1000
    pattern: '/api/delayed',
    jsonBody: ['1 sec delayed'],
  },
  {
    // * matches zero or more characters
    pattern: '/api/test1/*',
    handle: (req, res) => {
      res.end('Hello world star!' + req.url)
    }
  },
  {
    pattern: '/api/test1/users/{userId}',
    handle: (req, res) => {
      const data = {
        url: req.url,
        params: req.params,
        query: req.query
      }
      res.setHeader('Content-Type', 'application/json')
      res.end(JSON.stringify(data))
    }
  },
  {
    pattern: '/api/test1/body/json',
    method: 'POST',
    handle: (req, res) => {
      res.setHeader('Content-Type', 'application/json')

      // To use the data in the request body, read it from stream:
      // req is incomingMessage which extends stream.Readable 
      // --> https://nodejs.org/api/stream.html#readablereadsize
      // res.end need to be within the function
      // there is a size limit for the bodyString to get parsed 
      req.on('data', (bodyString: string) => { 
        let body: object = JSON.parse(bodyString)
        res.end(JSON.stringify(body))
      })
    }
  },
] as MockHandler[]

Metrics

The plugin will log all mock-routes and requests. These metrics are visible at //localhost:YOUR-PORT/mock-simple/ when your dev-server is running.

Try an example

This repository includes two example apps with some mock-routes

cd ./example2
npm i
npm run dev

Exported types by Module

MockHandler, an array of this objects are requiered by this plugin

export type MockHandler = {
  delay?: number,           // optional: time to delay the response in millisecounds
  pattern: string,          // pattern to match urls
  method?: string,          // default method is GET
  handle: (Request: Request, Response: http.ServerResponse) => void || response: Object
  jsonBody?: Object         // XOR to handle, only one of this properties can be defined per handler. A JS-Object that will be returned in json as response body
}

Request

type Request = Connect.IncomingMessage & { 
  body?: any, 
  params?: { [key: string]: string }, 
  query?: { [key: string]: string },
  cookies?: { [key: string]: string },
  session?: any
}

License

MIT