vows = require 'vows'
assert = require 'assert'
base32 = require '../dist/base32.min.js'
crypto = require 'crypto'

suite = vows.describe 'Base32 Encoding'

teststring = 'lowercase UPPERCASE 1234567 !@#$%^&*'

suite = suite.addBatch
  'When encoding a test string':
    topic: ->
      base32.encode teststring

    'it has the right value': (topic) ->
      assert.equal topic, 'dhqqetbjcdgq6t90an850haj8d0n6h9064t36d1n6rvj08a04cj2aqh658'

    'it decodes to the right value': (topic) ->
      assert.equal base32.decode(topic), teststring

  'When encoding a sha1 sum':
    topic: ->
      sha1 = crypto.createHash('sha1').update(teststring).digest('binary')
      original: sha1, encoded: base32.encode sha1

    'it has the right value': (topic) ->
      assert.equal topic.encoded, '1wwn60g9bv8n5g8n72udmk7yqm80dvtu'

    'it has 32 characters': (topic) ->
      assert.equal topic.encoded.length, 32

    'it decodes correctly': (topic) ->
      assert.equal topic.original, base32.decode(topic.encoded)

  'When using the built-in hasher':
    topic: ->
      hash = base32.sha1(teststring)

    'it produces the same value': (topic) ->
      assert.equal topic, '1wwn60g9bv8n5g8n72udmk7yqm80dvtu'

  'When streaming a string to encode':
    topic: ->
      enc = new base32.Encoder
      output = enc.update teststring.substr(0,10)
      output+= enc.update teststring.substr(10)
      output+= enc.finish()
      output

    'it should produce the correct value': (topic) ->
      assert.equal topic, 'dhqqetbjcdgq6t90an850haj8d0n6h9064t36d1n6rvj08a04cj2aqh658'

  'When decoding a string with common errors':
    topic: ->
      base32.decode 'dHqqetbjcdgq6t9Oan850hAj8d0n6h9O64t36dLn6rvjO8a04cj2aqh6S8'

    'it should be the same as the original': (topic) ->
      assert.equal topic, teststring

  'When using a streaming hash':
    topic: ->
      base32.sha1()

    'it should calculate the right digest': (hash) ->
      hash.update(teststring.substr(0,10))
      hash.update(teststring.substr(10))
      assert.equal hash.digest(), '1wwn60g9bv8n5g8n72udmk7yqm80dvtu'

  'When we hash a file':
    topic: ->
      base32.sha1.file('LICENSE', this.callback)

    'it should give the right value': (hash) ->
      assert.equal hash, 'za118kbdknm728mwx9r5g9rtv3mw2y4d'

suite.run()