Put some chaos in your express application.
The aim of this library is to provide simple chaos testing cases for express applications.
npm add express-chaos-middleware- Requests slowdown : Endpoints can be slowed down randomly
- Random response error : Endpoints can respond randomly with an error code
- Random exception : Endpoints can throw exceptions randomly
Chaos features have a 10 percent "chance" of being called by default. The percentage can be changed in the configuration object.
const {chaos} = require('express-chaos-middleware');
app.use(chaos())The probability of chaos can be configured in the input object param.
This parameter is a number value between 0 and 100.
const {chaos} = require('express-chaos-middleware');
app.use(chaos({
probability: 50,
}))The max slowdown delay can be configured in the input object param.
const {chaos} = require('express-chaos-middleware');
app.use(chaos({
maxDelay: 1000,
}))The http error codes array can be overridden in the input object param.
const {chaos} = require('express-chaos-middleware');
app.use(chaos({
errCodes: [400, 500],
}))The chaos feature list can be overrided in the input object param.
You can for example only use delay and http error codes with the following configuration
All rules are exported in the Rules object.
const {chaos} = require('express-chaos-middleware');
app.use(chaos({
rules: [Rules.DELAY, Rules.HTTPERROR],
}))