LibrarySystem/UnorderedLibrarySystem.html at master · meekowhy/LibrarySystem · GitHub

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<script src="TinyTestMod.js"></script>
<script>

	(function() {

		var libraryStorage = {}

		function librarySystem(libraryName, array, callback) {
			if (arguments.length > 1) {
				if (array.length === 0) {
					libraryStorage[libraryName] = callback();
				} else {
					libraryStorage[libraryName] = {};
					libraryStorage[libraryName]['callback'] = callback;
					libraryStorage[libraryName]['array'] = array;
				};
			} else {
				if (typeof libraryStorage[libraryName] !== 'object') {
					return libraryStorage[libraryName];
				} else {
					var arrayOfValues = libraryStorage[libraryName]['array'].map(function(currentValue) {
                				return libraryStorage[currentValue];
            					});
					return libraryStorage[libraryName]['callback'].apply(null,arrayOfValues)
				}
			};
	}

		window.librarySystem = librarySystem;

	})()


    tests({

        'TEST1: it should run a callback function': function() {
        	librarySystem('test1', [], function() {
        		var test1 = 'ok';
        		eq(test1,'ok');
			});

        },

        'TEST2: it should save a callback`s return value and return it back if provided with only 1 argument': function() {
        	librarySystem('test2', [], function() {
  				return 'value';
			});
            eq(librarySystem('test2'),'value');
        },

        'TEST3: it should run a callback with array items values as arguments': function() {
        	librarySystem('testKey', [], function() {
        		return 1;
        	});
        	librarySystem('testKey2', [], function() {
        		return 3;
        	});
        	librarySystem('test3', ['testKey','testKey2'], function(a,b) {
  				return a + b;
			});
			var b = librarySystem('test3');
			eq(4,b)
        },

        'TEST4: it should update the library if the value of corresponding array item has changed': function() {
        	librarySystem('test4', ['I should change'], function(a) {
  				return a;
			});
			librarySystem('I should change', [], function() {
  				return 'I have changed';
			});
			eq(librarySystem('test4'),'I have changed')
        },

		'TEST5: the callback function for each library should run only once. ': function() {
			var counter = 0;
			librarySystem('test5', ['a'], function(a) {
					counter++;
			});
			librarySystem('test5');
			librarySystem('test5');
			eq(counter,1)
		    },

    });

</script>