Beasts Question No. 3

script.js

// Beasts Question No. 3

// librarySystem with dependencies

// https://github.com/gordonmzhu/beasts/issues/1

(function() {

  var libraryStorage = {};

  function librarySystem(libraryName, dependencyArray, callback) {

    // create object
    if (arguments.length > 1) {

      // There are dependencies
      if (dependencyArray.length > 0) {

        var dependencyObjArray = dependencyArray.map(function(dependency) {
          return libraryStorage[dependency];
        });

        //debugger;

        libraryStorage[libraryName] = callback.apply(null, dependencyObjArray);

      } else {
        //No dependency, just create the object
        libraryStorage[libraryName] = callback();
      }

    } else {
      return libraryStorage[libraryName];
    }
  }

  window.librarySystem = librarySystem;

})();

test.js

tests({

    'No dependency': function() {

      librarySystem('dependency', [], function() {
        return 'loaded dependency';
      })

      eq("loaded dependency", librarySystem('dependency'));

    },


    'One dependency': function() {

      librarySystem('dependency', [], function() {
        return 'loaded dependency';
      });

      librarySystem('app', ['dependency'], function(dependency) {
        return 'app with ' + dependency;
      });

      eq("app with loaded dependency", librarySystem('app'));

    },


    'Two dependency': function() {

      librarySystem('name', [], function() {
        return 'Gordon';
      });

      librarySystem('company', [], function() {
        return 'Watch and Code';
      });

      librarySystem('workBlurb', ['name', 'company'], function(name, company) {
        return name + ' works at ' + company;
      });

      eq("Gordon works at Watch and Code", librarySystem('workBlurb'));

    },


  });