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index.js
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index.js
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var mn = require('mininet')({stdio: 'inherit', prefixStdio: true, defer: true})
var tape = require('tape')
var path = require('path')
var pending = []
var parentFilename = (module.parent && module.parent.filename) || '.'
var parentDirname = path.dirname(parentFilename)
delete require.cache[__filename]
tape.onFinish(function () {
if (mn.started) mn.stop()
})
test.mininet = mn
test.hosts = mn.hosts
test.switches = mn.switches
test.topologies = require('./topologies')(mn)
test.createSwitch = function () {
return mn.createSwitch()
}
test.createHost = function () {
return mn.createHost()
}
test.createController = function () {
return mn.createController()
}
module.exports = test
test.only = (name, fn) => tape.only(name, t => runner(t, fn))
test.skip = (name, fn) => {}
function test (name, fn) {
tape(name, t => runner(t, fn))
}
function runner (t, fn) {
if (!mn.started) {
var old = global.__mininet__
if (old && old.started && !old.stopped) {
old.on('stop', start)
old.stop()
} else {
start()
}
} else {
ready()
}
function start () {
global.__mininet__ = mn
mn.on('start', ready)
mn.start()
}
function ready () {
t.run = run
var missing = pending.length
if (!missing) return fn(t)
pending.forEach(function (proc) {
if (proc.killed) return process.nextTick(onclose)
proc.on('close', onclose)
proc.kill('SIGINT')
function onclose () {
if (!--missing) {
pending = []
fn(t)
}
}
})
}
function run (host, src) {
var hostFilename = require.resolve('mininet/host')
if (typeof src === 'function') src = ';(' + src.toString() + ')()'
var proc = host.spawnNode(`
var EventEmitter = require('events').EventEmitter
var host = require('${hostFilename}')
var target = {}
var ip = '${host.ip}'
var mac = '${host.mac}'
var __dirname = '${parentDirname}'
var __filename = '${parentFilename}'
global.t = new Proxy({}, {
get: function (target, name) {
return function (...args) {
host.send('test', {name, args})
}
}
})
var handler =
vm.runInNewContext(
${JSON.stringify(src)},
new Proxy(target, {
get: function (target, name) {
if (global.hasOwnProperty(name)) return global[name]
if (target.hasOwnProperty(name)) return target[name]
if (name !== 'tapenet' && !/^h\\d+$/.test(name)) return
var e = target[name] = createEmitter(name)
return e
}
}),
{filename: '[${host.id}-test]'}
)
function createEmitter (id) {
var e = new EventEmitter()
e.id = id
e.emit = function (...args) {
EventEmitter.prototype.emit.apply(this, arguments)
host.broadcast(id + ':emit', args)
return true
}
host.on('message:' + id + ':emit', function (args) {
EventEmitter.prototype.emit.apply(e, args)
})
return e
}
`)
proc.on('message:test', function (data) {
t[data.name].apply(t, data.args)
})
pending.push(proc)
return proc
}
}