TestDouble の TestStub と TestSpy

test_double.js

// see http://goyoki.hatenablog.com/entry/20120301/1330608789
var q = require('qunitjs')
;(function () {
    var qTap = require('qunit-tap')
    qTap(q, require('util').puts, {showSourceOnFailure: false})
    q.init()
    q.config.updateRate = 0
    q.assert.is = q.assert.strictEqual
})()


q.module('stub: 関節入力値を操作する', {
    setup: function () {
        this.stub = function () { return this.v }.bind(this)
    }
  , teardown: function () {
        this.v = null
    }
})
q.test('use stub', function (t) {
    var subt = function subt (input, except) {
        this.v = input
        t.is(except, this.stub())
    }.bind(this)

    subt(100, 100)
    subt(-1,  -1)
})


q.module('spy: 間接出力値を操作する', {
    setup: function () {
        this.spy = function (input) { this.output = input }.bind(this)
    }
  , teardown: function () {
        this.output = null
    }
})
q.test('use spy', function (t) {
    var subt = function subt (input, except) {
        this.spy(input)
        t.is(except, this.output)
    }.bind(this)

    subt(100, 100)
    subt(-1, -1)
})