Write specs for cmd arguments

lib/program.js

@@ -1,20 +1,23 @@
-var _ = require('lodash');
 var program = require('commander');
 
-var list = function(val) {
-  return _(val.split(',')).map(function(format) {
+var parseList = function(list) {
+  return list.split(',').map(function(format) {
     return format.trim();
   });
 };
 
+var DEFAULT_FORMATS = ['avi', 'mkv', 'mp4', 'mpg'];
+
 program
   .version(require('../package.json').version)
-  .option('-f, --formats [formats]', 'list of movie formats to process, default avi,mkv,mp4,mpg', list)
+  .option('-f, --formats [formats]',
+    'list of movie formats to process, default ' + DEFAULT_FORMATS.join(', '),
+    parseList)
   .option('-d, --directory [directory]', 'working directory')
   .parse(process.argv);
 
 if (!program.formats) {
-  program.formats = ['avi', 'mkv', 'mp4', 'mpg'];
+  program.formats = DEFAULT_FORMATS;
 }
 
 module.exports = program;

lib/program_spec.js

@@ -0,0 +1,40 @@
+var expect = require('chai').expect;
+
+var program = require('./program');
+
+describe('program', function() {
+
+  beforeEach(function() {
+    program.parse(['', '', '-d', '/foo/bar'])
+  });
+
+  describe('directory', function() {
+
+    it('can be overridden', function() {
+      expect(program.directory).to.eq('/foo/bar');
+    });
+
+  });
+
+  describe('formats', function() {
+
+    it('has default values', function() {
+      expect(program.formats).to.be.an('array');
+      expect(program.formats).to.include('avi');
+      expect(program.formats).to.include('mkv');
+      expect(program.formats).to.include('mp4');
+      expect(program.formats).to.include('mpg');
+    });
+
+    it('can be overridden', function() {
+      program.parse(['', '', '-f', 'gif, swf']);
+
+      expect(program.formats).to.be.an('array');
+      expect(program.formats).to.have.length(2);
+      expect(program.formats).to.include('gif');
+      expect(program.formats).to.include('swf');
+    });
+
+  });
+
+});