WIKIPEDIA proxyquire.js

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/* jshint asi:true */
'use strict'

var assert = require('assert')
var proxyquire = require('..')
var stats = require('./samples/stats')

describe('Given foo requires the bar and path modules and bar.bar() returns "bar"', function () {
  var file = '/folder/test.ext'
  var foo
  var foober
  var barber = { bar: function () { return 'barber' } }

describe('When I resolve foo with no overrides to bar as foo and resolve foo with barber stub as foober.', function () {
    before(function () {
      stats.reset()
      foo = proxyquire('./samples/foo', { './bar': { /* no overrides */ } })
      foober = proxyquire('./samples/foo', { './bar': barber })
    })

it('foo is required 2 times', function () {
      assert.strictEqual(stats.fooRequires(), 2)
    })

describe('foo\'s bar is unchanged', function () {
      it('foo.bigBar() == "BAR"', function () {
        assert.strictEqual(foo.bigBar(), 'BAR')
      })
    })

describe('only stubbed modules have overrides in foober', function () {
      it('foober.bigBar() == "BARBER"', function () {
        assert.strictEqual(foober.bigBar(), 'BARBER')
      })

it('foober.bigExt("/folder/test.ext") == ".EXT"', function () {
        assert.strictEqual(foober.bigExt(file), '.EXT')
      })

it('foober.bigBas("/folder/test.ext") == "TEST.EXT"', function () {
        assert.strictEqual(foober.bigBas(file), 'TEST.EXT')
      })
    })

describe('when I override keys of stubs after resolve', function () {
      before(function () {
        barber.bar = function () { return 'friseur' }
        barber.rab = function () { return 'rabarber' }
      })

it('overrides behavior when module is required inside function call', function () {
        assert.strictEqual(foober.bigBar(), 'FRISEUR')
      })

it('overrides behavior when module is required on top of file', function () {
        assert.strictEqual(foober.bigRab(), 'RABARBER')
      })

describe('and then delete overrides of stubs after resolve', function () {
        beforeEach(function () {
          delete barber.bar
          delete barber.rab
        })

it('reverts to original behavior when module is required inside function call', function () {
          assert.strictEqual(foober.bigBar(), 'BAR')
        })

it('doesn\'t properly revert to original behavior when module is required on top of file ', function () {
          assert.throws(foober.bigRab)
        })
      })
    })
  })

describe('When foo.bigExt() returns capitalized path.extname and foo.bigBas() returns capitalized path.basename', function () {
    describe('and path.extname(file) is stubbed to return "override " + file', function () {
      describe('and callThru was not changed globally or for path module', function () {
        before(function () {
          foo = proxyquire('./samples/foo', {
            path: {
              extname: function (file) { return 'override ' + file }
            }
          })
        })

it('foo.bigExt(file) == "OVERRIDE /FOLDER/TEST.EXT"', function () {
          assert.strictEqual(foo.bigExt(file), 'OVERRIDE /FOLDER/TEST.EXT')
        })

it('foo.bigBas(file) == "TEST.EXT"', function () {
          assert.strictEqual(foo.bigBas(file), 'TEST.EXT')
        })
      })

describe('and callThru is turned off for path module', function () {
        before(function () {
          foo = proxyquire('./samples/foo', {
            path: {
              extname: function (file) { return 'override ' + file }, '@noCallThru': true
            }
          })
        })

it('foo.bigExt(file) == "OVERRIDE /FOLDER/TEST.EXT"', function () {
          assert.strictEqual(foo.bigExt(file), 'OVERRIDE /FOLDER/TEST.EXT')
        })

it('foo.bigBas(file) throws', function () {
          assert.throws(foo.bigBas)
        })
      })

describe('and callThru was turned off globally', function () {
        var $proxyquire
        before(function () {
          $proxyquire = proxyquire.noCallThru()
        })

describe('and not changed for path module', function () {
          before(function () {
            foo = $proxyquire('./samples/foo', {
              path: {
                extname: function (file) { return 'override ' + file }
              }
            })
          })

it('foo.bigExt(file) == "OVERRIDE /FOLDER/TEST.EXT"', function () {
            assert.strictEqual(foo.bigExt(file), 'OVERRIDE /FOLDER/TEST.EXT')
          })

it('foo.bigBas(file) throws', function () {
            assert.throws(foo.bigBas)
          })
        })

describe('and turned back on for path module', function () {
          before(function () {
            foo = $proxyquire('./samples/foo', {
              path: {
                extname: function (file) { return 'override ' + file }, '@noCallThru': false
              }
            })
          })

it('foo.bigExt(file) == "OVERRIDE /FOLDER/TEST.EXT"', function () {
            assert.strictEqual(foo.bigExt(file), 'OVERRIDE /FOLDER/TEST.EXT')
          })

it('foo.bigBas(file) == "TEST.EXT"', function () {
            assert.strictEqual(foo.bigBas(file), 'TEST.EXT')
          })
        })

describe('and turned back on globally', function () {
          before(function () {
            foo = $proxyquire
              .callThru()
              .load('./samples/foo', {
                path: {
                  extname: function (file) { return 'override ' + file }
                }
              })
          })

it('foo.bigExt(file) == "OVERRIDE /FOLDER/TEST.EXT"', function () {
            assert.strictEqual(foo.bigExt(file), 'OVERRIDE /FOLDER/TEST.EXT')
          })

it('foo.bigBas(file) == "TEST.EXT"', function () {
            assert.strictEqual(foo.bigBas(file), 'TEST.EXT')
          })
        })
      })
    })
  })
})