old_contents: var assert = require('assert');
  var fs = require('fs');
  var path = require('path');
  
  var formatTextToTanzaku = require('../index');
  
  var konnichiwaSekaiTanzaku = fs.readFileSync(path.join(__dirname, 'support/konnichiwa-sekai.txt')).toString();
  konnichiwaSekaiTanzaku = konnichiwaSekaiTanzaku.replace(/\n$/, '');
  var helloWorldTanzaku = fs.readFileSync(path.join(__dirname, 'support/hello-world.txt')).toString();
  helloWorldTanzaku = helloWorldTanzaku.replace(/\n$/, '');
  
  
  describe('tanzaku', function() {
  
    it('should be defined', function() {
      assert.strictEqual(typeof formatTextToTanzaku, 'function');
    });
  
    it('should format zenkaku-text', function() {
      var actual = formatTextToTanzaku('こんにちわ、世界！');
      assert.strictEqual(actual, konnichiwaSekaiTanzaku);
    });
  
    it('should format hankaku-text', function() {
      var actual = formatTextToTanzaku('Hello World!');
      assert.strictEqual(actual, helloWorldTanzaku);
    });
  });
  
new_contents: var assert = require('assert');
  var fs = require('fs');
  var path = require('path');
  
  var formatTextToTanzaku = require('../index');
  
  var konnichiwaSekaiTanzaku = fs.readFileSync(path.join(__dirname, 'support/konnichiwa-sekai.txt')).toString();
  konnichiwaSekaiTanzaku = konnichiwaSekaiTanzaku.replace(/\n$/, '');
  var helloWorldTanzaku = fs.readFileSync(path.join(__dirname, 'support/hello-world.txt')).toString();
  helloWorldTanzaku = helloWorldTanzaku.replace(/\n$/, '');
  
  
  describe('tanzaku', function() {
  
    it('should be defined', function() {
      assert.strictEqual(typeof formatTextToTanzaku, 'function');
    });
  
    it('should format zenkaku-text', function() {
      var actual = formatTextToTanzaku('こんにちわ、世界！');
      assert.strictEqual(konnichiwaSekaiTanzaku, actual);
    });
  
    it('should format hankaku-text', function() {
      var actual = formatTextToTanzaku('Hello World!');
      assert.strictEqual(helloWorldTanzaku, actual);
    });
  });
  
subject: Tweak test code