Testing the code involves a simple process: it triggers a method based on a certain condition. If the condition is not met, another method from within the first one is triggered as an attribute.
app.js:
function test (fn, isActivated) {
if (isActivated) {
return fn('foo')
}
return fn.subFn('bar')
}
var fn = function (p) { return p }
fn.subFn = function (p) { return 'sub-' + p }
var resFn = test(fn, true)
var resSubFn = test(fn, false)
document.write(resFn) // displays 'foo' as expected
document.write(resSubFn) // displays 'bar' as expectedA spy has been placed on each method, but oddly enough, the spy on the fn method does not seem to work while the spy on the enclosed method subFn functions correctly. Here's the scenario:
app.test.js:
'use strict'
const chai = require('chai')
const sinon = require('sinon')
const trigger = require('../app').trigger
chai.should()
describe('test app', function () {
before(function () {
this.fn = function () {}
this.fn.subFn = function () {}
this.subFnSpy = sinon.spy(this.fn, 'subFn')
this.fnSpy = sinon.spy(this.fn)
})
describe('isActivated is true', function () {
before(function () {
trigger(this.fn, true)
})
it('should invoke fn', function () {
this.fnSpy.callCount.should.equal(1) // returns false because callCount = 0
})
})
describe('isActivated is false', function () {
before(function () {
trigger(this.fn, false)
})
it('should invoke subFn', function () {
this.subFnSpy.callCount.should.equal(1) // returns false because callCount = 0
})
})
})
Since the spy on the fn function seems to be malfunctioning, I attempted using two separate methods. Unfortunately, both spies failed in this instance:
app.js:
exports.trigger = function (fn, subFn, isActivated) {
if (isActivated) {
return fn('fn')
}
return subFn('bar')
}
app.test.js
'use strict'
const chai = require('chai')
const sinon = require('sinon')
const trigger = require('../app').trigger
chai.should()
describe('test app', function () {
before(function () {
this.fn = function () {}
this.subFn = function () {}
this.fnSpy = sinon.spy(this.fn)
this.subFnSpy = sinon.spy(this.subFn)
})
beforeEach(function () {
this.fnSpy.reset()
this.subFnSpy.reset()
})
describe('isActivated is true', function () {
before(function () {
trigger(this.fn, this.subFn, true)
})
it('should invoke fn if isActivated is true', function () {
this.fnSpy.callCount.should.equal(1) // returns false
})
})
describe('isActivated is false', function () {
before(function () {
trigger(this.fn, this.subFn, false)
})
it('should invoke subFn if isActivated is true', function () {
this.subFnSpy.callCount.should.equal(1) // returns false
})
})
})
Any suggestions on what might be going wrong here?