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foo-tests.js
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foo-tests.js
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'use strict'
/*
* These examples demonstrate how to use proxyquire with Sinon.JS (<http://sinonjs.org/>).
* Run these tests with mocha (<http://visionmedia.github.com/mocha/>).
* e.g., mocha foo-tests.js
*/
var proxyquire = require('../..')
var sinon = require('sinon')
var assert = require('assert')
var fs = require('fs')
var path = require('path')
var foo
// Stubbing return values
describe('when path.extname(file) returns ".markdown"', function () {
var extnameStub
var file = 'somefile'
before(function () {
extnameStub = sinon.stub(path, 'extname')
foo = proxyquire('./foo', { path: { extname: extnameStub } })
extnameStub.withArgs(file).returns('.markdown')
})
after(function () {
path.extname.restore()
})
it('extnameAllCaps returns ".MARKDOWN"', function () {
assert.strictEqual(foo.extnameAllCaps(file), '.MARKDOWN')
})
})
// Stubbing callbacks
describe('when fs.readdir calls back with ["file1", "file2"]', function () {
var readdirStub
before(function () {
readdirStub = sinon.stub(fs, 'readdir')
foo = proxyquire('./foo', { fs: { readdir: readdirStub } })
readdirStub.withArgs('../simple').yields(null, ['file1', 'file2'])
})
after(function () {
fs.readdir.restore()
})
it('filesAllCaps calls back with ["FILE1", "FILE2"]', function (done) {
foo.filesAllCaps('../simple', function (err, files) {
assert.strictEqual(err, null)
assert.strictEqual(files[0], 'FILE1')
assert.strictEqual(files[1], 'FILE2')
done()
})
})
})
describe('when fs.readdir returns an error', function () {
var readdirError,
readdirStub
before(function () {
readdirStub = sinon.stub(fs, 'readdir')
foo = proxyquire('./foo', { fs: { readdir: readdirStub } })
readdirError = new Error('some error')
readdirStub.withArgs('../simple').yields(readdirError, null)
})
after(function () {
fs.readdir.restore()
})
it('filesAllCaps calls back with that error', function (done) {
foo.filesAllCaps('../simple', function (err, files) {
assert.strictEqual(err, readdirError)
assert.strictEqual(files, null)
done()
})
})
})
// Spying
describe('when calling filesAllCaps with "../simple"', function () {
var readdirSpy
before(function () {
readdirSpy = sinon.spy(fs, 'readdir')
foo = proxyquire('./foo', { fs: { readdir: readdirSpy } })
})
after(function () {
fs.readdir.restore()
})
it('calls fs.readdir with "../simple"', function (done) {
foo.filesAllCaps('../simple', function (err, files) {
assert.ifError(err)
assert(fs.readdir.calledOnce)
assert.strictEqual(fs.readdir.getCall(0).args[0], '../simple')
done()
})
})
})