/*!
 * limon-prev-next <https://github.com/limonjs/limon-prev-next>
 *
 * Copyright (c) 2016 Charlike Mike Reagent <@tunnckoCore> (http://www.tunnckocore.tk)
 * Released under the MIT license.
 */

/* jshint asi:true */

'use strict'

var test = require('assertit')
var Limon = require('limon').Limon
var plugin = require('./index')

test('should add prev/next methods', function (done) {
  var lexer = new Limon()
    .use(plugin())
    .use(function (app) {
      return function () {
        test.strictEqual(typeof this.prev, 'function')
        test.strictEqual(typeof this.next, 'function')
        test.strictEqual(typeof this.step, 'function')
        test.strictEqual(typeof app.prev, 'function')
        test.strictEqual(typeof app.next, 'function')
        test.strictEqual(typeof app.step, 'function')
      }
    })
    .tokenize('foo bar')

  test.strictEqual(typeof lexer.prev, 'undefined')
  test.strictEqual(typeof lexer.next, 'undefined')
  test.strictEqual(typeof lexer.step, 'undefined')
  done()
})

test('should `prev` method be able to pass a string as number', function (done) {
  new Limon()
    .use(plugin())
    .use(function () {
      return function (ch) {
        if (ch === 'c') {
          test.strictEqual(this.prev(0), 'c')
          test.strictEqual(this.step(0), 'c')

          test.strictEqual(this.prev('0'), 'c')
          test.strictEqual(this.step('0'), 'c')

          test.strictEqual(this.prev(), '>')
          test.strictEqual(this.step(-1), '>')

          test.strictEqual(this.prev(1), '>')
          test.strictEqual(this.prev('1'), '>')
          test.strictEqual(this.step('-1'), '>')

          test.strictEqual(this.prev(3), 'b')
          test.strictEqual(this.prev('3'), 'b')
          test.strictEqual(this.step('-3'), 'b')
        }
      }
    })
    .tokenize('ab >c.8')

  done()
})

test('should `next` method be able to pass a string as number', function (done) {
  new Limon()
    .use(plugin())
    .use(function () {
      return function (ch) {
        if (ch === ' ') {
          test.strictEqual(this.next(0), ' ')
          test.strictEqual(this.step(0), ' ')

          test.strictEqual(this.next('0'), ' ')
          test.strictEqual(this.step('0'), ' ')

          test.strictEqual(this.next(1), '>')
          test.strictEqual(this.next('1'), '>')
          test.strictEqual(this.step(1), '>')
          test.strictEqual(this.step('1'), '>')

          test.strictEqual(this.next(4), '8')
          test.strictEqual(this.next('4'), '8')
          test.strictEqual(this.step(4), '8')
          test.strictEqual(this.step('4'), '8')
        }
      }
    })
    .tokenize('ab >c.8')

  done()
})