--- /dev/null
+'use strict'
+var test = require('tap').test
+var util = require('util')
+var stream = require('readable-stream')
+var TrackerStream = require('../index.js').TrackerStream
+var testEvent = require('./lib/test-event.js')
+
+var Sink = function () {
+ stream.Writable.apply(this, arguments)
+}
+util.inherits(Sink, stream.Writable)
+Sink.prototype._write = function (data, encoding, cb) {
+ cb()
+}
+
+test('TrackerStream', function (t) {
+ t.plan(9)
+
+ var name = 'test'
+ var track = new TrackerStream(name)
+
+ t.is(track.completed(), 0, 'Nothing todo is 0 completion')
+
+ var todo = 10
+ track = new TrackerStream(name, todo)
+ t.is(track.completed(), 0, 'Nothing done is 0 completion')
+
+ track.pipe(new Sink())
+
+ testEvent(track, 'change', afterCompleteWork)
+ track.write('0123456789')
+ function afterCompleteWork (er, onChangeName) {
+ t.is(er, null, 'write: on change event fired')
+ t.is(onChangeName, name, 'write: on change emits the correct name')
+ t.is(track.completed(), 1, 'write: 100% completed')
+
+ testEvent(track, 'change', afterAddWork)
+ track.addWork(10)
+ }
+ function afterAddWork (er, onChangeName) {
+ t.is(er, null, 'addWork: on change event fired')
+ t.is(track.completed(), 0.5, 'addWork: 50% completed')
+
+ testEvent(track, 'change', afterAllWork)
+ track.write('ABCDEFGHIJKLMNOPQRST')
+ }
+ function afterAllWork (er) {
+ t.is(er, null, 'allWork: on change event fired')
+ t.is(track.completed(), 1, 'allWork: 100% completed')
+ }
+})