test.js

'use strict';
/* global it: false, describe: false */

var plural = require('./index')
  , assert = require('assert')

describe('test monkey patching', function() {
  describe('removing monkey patching (unmonkeyPatch)', function() {
    it('should work as intended', function() {
      plural.monkeyPatch()
      assert.doesNotThrow(function() { String('test').plural() }, 'plural should be monkeypatched into String')
      plural.unmonkeyPatch()
      assert.throws(function() { String('test').plural() }, TypeError, 'plural should not be monkeypatched into String')
    })
  })
})

describe('plurals match', function() {
  it('should match plurals', function() {
    assert.equal(plural('test'), 'tests')
    assert.equal(plural('hero'), 'heroes')
    assert.equal(plural('embryo'), 'embryos')
    assert.equal(plural('zero'), 'zeroes')
    assert.equal(plural('cherry'), 'cherries')
    assert.equal(plural('sky'), 'skies')
    assert.equal(plural('seaway'), 'seaways')
    assert.equal(plural('soliloquy'), 'soliloquies')
    assert.equal(plural('monkey'), 'monkeys')
    assert.equal(plural('day'), 'days')
    assert.equal(plural('witch'), 'witches')
    assert.equal(plural('box'), 'boxes')
    assert.equal(plural('gallery'), 'galleries')
    assert.equal(plural('stereo'), 'stereos')
    assert.equal(plural('memo'), 'memos')
    assert.equal(plural('hero'), 'heroes')
    assert.equal(plural('omen'), 'omens')
    assert.equal(plural('chilli'), 'chillies')
  })

  it('should match greek/latin plurals', function() {
    assert.equal(plural('nucleus'), 'nuclei')
    assert.equal(plural('syllabus'), 'syllabi')
    assert.equal(plural('focus'), 'foci')
    assert.equal(plural('fungus'), 'fungi')
    assert.equal(plural('cactus'), 'cacti')

    assert.equal(plural('thesis'), 'theses')
    assert.equal(plural('crisis'), 'crises')

    assert.equal(plural('appendix'), 'appendices')
    assert.equal(plural('index'), 'indices')

    assert.equal(plural('criterion'), 'criteria')
  })

  it('should convert f/fe ending words to "ves"', function() {
    assert.equal(plural('knife'), 'knives')
    assert.equal(plural('leaf'), 'leaves')
    assert.equal(plural('hoof'), 'hooves')
    assert.equal(plural('life'), 'lives')
    assert.equal(plural('self'), 'selves')
    assert.equal(plural('elf'), 'elves')
  })

  it('should handle man/woman/human', function() {
    assert.equal(plural('man'), 'men')
    assert.equal(plural('woman'), 'women')
    assert.notEqual(plural('oman'), 'omen')
    assert.equal(plural('human'), 'humans')
  })

  it('should handle words that are the same both singular/plural', function() {
    assert.equal(plural('bison'), 'bison')
    assert.equal(plural('cod'), 'cod')
    assert.equal(plural('deer'), 'deer')
    assert.equal(plural('fowl'), 'fowl')
    assert.equal(plural('halibut'), 'halibut')
    assert.equal(plural('moose'), 'moose')
    assert.equal(plural('sheep'), 'sheep')
    assert.equal(plural('kudos'), 'kudos')
    assert.equal(plural('premises'), 'premises')
    assert.equal(plural('shambles'), 'shambles')
  })

  it('should not flag anything that starts with those above words', function() {
    assert.equal(plural('zipcode'), 'zipcodes')
    assert.equal(plural('afowl'), 'afowls')
    assert.equal(plural('moosed'), 'mooseds')
  })

  it('should handle some unique plurals', function() {
    assert.equal(plural('die'), 'dice')
    assert.equal(plural('goose'), 'geese')
    assert.equal(plural('mouse'), 'mice')
    assert.equal(plural('person'), 'people')
  })

  it('should handle plurals that are singular', function() {

    var tools = ['goggle', 'scissor', 'plier', 'tong', 'tweezer']
    var clothes = ['trouser', 'pant', 'pantie', 'clothe']
    var games = ['billiard', 'bowl', 'card', 'dart', 'skittle', 'draught']
    var illnesses = ['diabete', 'measle', 'mump', 'rabie', 'ricket', 'shingle']
    var misc = ['kudo', 'premise', 'shamble', 'glasse', 'spectacle', 'jitter',
      'alm', 'fece', 'bowel', 'sud', 'entrail', 'electronic', 'outskirt', 'odd', 'tropic',
      'riche', 'surrounding', 'thank', 'heroic', 'remain', 'amend'
    ]

    tools.concat(clothes, games, illnesses, misc).forEach(function(w) {
      assert.equal(plural(w + 's'), w + 's')
    })
  })

  it('should handle -ics ending words', function() {
    var words = [
      'mathematics', 'statistics', 'linguistics', 'classics', 'acoustics',
    ]
    words.forEach(function(w) {
      assert.equal(plural(w), w)
    })
  })

  it('should make sure uncountable words aren\'t converted to plural form', function() {
    var words = [
      'tea', 'sugar', 'water', 'air', 'rice', 'knowledge', 'beauty',
      'anger', 'fear', 'love', 'money', 'research', 'safety', 'evidence'
    ]
    words.forEach(function(w) {
      assert.equal(plural(w), w)
    })
  })

  it('should make sure addRule works', function() {
    assert.notEqual(plural('zzz'), 'roh')

    plural.addRule('zzz', 'yyy')

    assert.equal(plural('zzz'), 'yyy')
  })

  it('should be case insensitive', function() {
    assert.equal(plural('test'), 'tests')
    assert.equal(plural('Test'), 'Tests')
    assert.equal(plural('TesT'), 'TesTs')
    assert.equal(plural('pennY'), 'pennies')
    assert.equal(plural('PeNnY'), 'PeNnies')
    assert.equal(plural('KudoS'), 'KudoS')
  })
})

describe('addRule should return plural construct', function() {
  it('should be equal', function() {
    assert.equal(plural.addRule(/garababble/i, function(w) { return w }), plural)
  })
})