Two duplex streams that are eachothers passthrough
npm install passthrough-pair
const pair = require('passthrough-pair')
const [a, b] = pair()
a.write('hello')
b.on('data', function (data) {
// hello
b.write('echo: ' + data)
})
a.on('data', function (data) {
// echo: hello
})
Mostly useful for testing flows
Apache-2.0