sergiorgiraldo/Guess the number

## Guess the number
//GUESS.JS

		var register;

		function Register(){
			this.low = 0;
			this.high = 100;
			this.last = 0;
		}

		//Guess strategies

		var Guesser = function(){
			this.direction = "";
		};

		Guesser.prototype = {
			setDirection:function(direction){
				this.direction = direction;
			},

			guess:function(){
				return this.direction.guess();
			}
		};

		var guessInitial = function(){
			this.guess =  function(){
				return Math.floor((Math.random() * 100) + 1);
			}
		};

		var guessHigher = function(){
			this.guess =  function(){
				register.low = register.last;

				return Math.floor((register.high + register.last)/2);
			}
		};

		var guessLower = function(){
			this.guess =  function(){
				register.high = register.last;

				return Math.floor((register.low + register.last)/2);
			}
		};

		//END - Guess strategies

		//UI methods

		var template = {
			strategy:null,

			setup:function(){

			},

			exec:function(){
				this.setup();

				if (!this.strategy){
					alert("UPS, DEFINE STRATEGY FIRST");
					return;
				}

				var guesser = new Guesser();
				guesser.setDirection(this.strategy);

				register.last = guesser.guess();

				updateUi();
			}
		};

		function getTemplate(){
			var F = function(){};
			F.prototype = template;
			return new F();
		}

		function start(){
			var impl = getTemplate();

			impl.setup = function(){
				impl.strategy = new guessInitial();
				register = new Register()
			};

			impl.exec();
		}

		function higher(){
			var impl = getTemplate();

			impl.setup = function(){
				impl.strategy = new guessHigher();
			};

			impl.exec();
		}

		function lower(){
			var impl = getTemplate();

			impl.setup = function(){
				impl.strategy = new guessLower();
			};

			impl.exec();
		}

		function gotIt(){
			alert("Heeeeeeeeee");
		}

		function $(el){
			return document.getElementById(el);
		}

		function updateUi(){
			$("nb").innerText = register.last;

			doTable();
		}

		function createCell(value){
			var cell = document.createElement("td");
	        var cellText = document.createTextNode(value);
	        cell.appendChild(cellText);
	        return cell;
		}

		function doTable(){
			var row = document.createElement("tr");

	        row.appendChild(createCell(register.low));
	        row.appendChild(createCell(register.high));
	        row.appendChild(createCell(register.last));

			$("tbody").appendChild(row);
		}

		//END UI methods

//GUESS.HTML
<!DOCTYPE html>
<html>
<head>
  <script type="text/javascript" src="./guess.js"></script><!-- SUT -->
</head>
<body>
	Pense em um número entre 1 e 100, aperte OK e eu vou adivinhar!<br/>
	<button id="start" onclick="start()">OK</button>
	<p>Seu número é <label id="nb"></label> ?</p>

	<p>
		<button id="higher" onclick="higher();">Meu número é higher</button>
		<button id="lower" onclick="lower();">Meu número é lower</button>
		<button id="gotIt" onclick="gotIt();">Acertou!</button>
	</p>

	<table name="tbl" id="tbl" border="1">
		<thead>
			<tr>
				<td>low</td>
				<td>high</td>
				<td>last</td>
			</tr>
		</thead>
		<tbody id="tbody">
		</tbody>
	</table>
</body>
</html>

//GUESSTESTS.HTML
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Guess unit tests</title>

  <link rel="stylesheet" type="text/css" href="jasmine/jasmine.css">

  <script type="text/javascript" src="jasmine/jasmine.js"></script>
  <script type="text/javascript" src="jasmine/jasmine-html.js"></script>
  <script type="text/javascript" src="jasmine/boot.js"></script>

  <script type="text/javascript" src="./guess.js"></script><!-- SUT -->

  <script type="text/javascript">
    describe("generic tests", function(){
      it( "register must initialize with 0 as low", function() {
        var r = new Register();
        expect(r.low).toBe(0);
        });

      it( "register must initialize with 100 as high", function() {
        var r = new Register();
        expect(r.high).toBe(100);
        });

      it("initial guess must multiply by 100 and sum 1 - random value", function(){
        spyOn(Math, "random").and.callFake(function(o){
          return 0.4;
        });

        expect(new guessInitial().guess()).toEqual(41);
        expect(Math.random).toHaveBeenCalled();
      });

      it("initial guess must multiply by 100 and sum 1 - edge value 0", function(){
        spyOn(Math, "random").and.callFake(function(o){
          return 0;
        });

        expect(new guessInitial().guess()).toEqual(1);
        expect(Math.random).toHaveBeenCalled();
      });

      it("initial guess must multiply by 100 and sum 1 - edge value 0.99", function(){
        spyOn(Math, "random").and.callFake(function(o){
          return 0.99;
        });

        expect(new guessInitial().guess()).toEqual(100);
        expect(Math.random).toHaveBeenCalled();
      });

      it("guess high must update low register", function(){
        register = new Register();
        register.high = 11;
        register.low = 12;
        register.last = 13;
        new guessHigher().guess();
        expect(register.low).toEqual(register.last);
      });

      it("guess high must be media from high and last", function(){
        register = new Register();
        register.high = 11;
        register.low = 8;
        register.last = 13;
        var nb = new guessHigher().guess();
        expect(nb).toEqual((register.high + register.last)/2);
      });

      it("guess low must update high register", function(){
        register = new Register();
        register.high = 31;
        register.low = 32;
        register.last = 33;
        new guessLower().guess();
        expect(register.high).toEqual(register.last);
      });

      it("guess low must be media from low and last", function(){
        register = new Register();
        register.high = 8;
        register.low = 11;
        register.last = 13;
        var nb = new guessLower().guess();
        expect(nb).toEqual((register.low + register.last)/2);
      });

    });
  </script>
</head>
<body></body>
</html>
	//GUESS.JS

	var register;

	function Register(){
	this.low = 0;
	this.high = 100;
	this.last = 0;
	}

	//Guess strategies

	var Guesser = function(){
	this.direction = "";
	};

	Guesser.prototype = {
	setDirection:function(direction){
	this.direction = direction;
	},

	guess:function(){
	return this.direction.guess();
	}
	};

	var guessInitial = function(){
	this.guess = function(){
	return Math.floor((Math.random() * 100) + 1);
	}
	};

	var guessHigher = function(){
	this.guess = function(){
	register.low = register.last;

	return Math.floor((register.high + register.last)/2);
	}
	};

	var guessLower = function(){
	this.guess = function(){
	register.high = register.last;

	return Math.floor((register.low + register.last)/2);
	}
	};

	//END - Guess strategies

	//UI methods

	var template = {
	strategy:null,

	setup:function(){

	},

	exec:function(){
	this.setup();

	if (!this.strategy){
	alert("UPS, DEFINE STRATEGY FIRST");
	return;
	}

	var guesser = new Guesser();
	guesser.setDirection(this.strategy);

	register.last = guesser.guess();

	updateUi();
	}
	};

	function getTemplate(){
	var F = function(){};
	F.prototype = template;
	return new F();
	}

	function start(){
	var impl = getTemplate();

	impl.setup = function(){
	impl.strategy = new guessInitial();
	register = new Register()
	};

	impl.exec();
	}

	function higher(){
	var impl = getTemplate();

	impl.setup = function(){
	impl.strategy = new guessHigher();
	};

	impl.exec();
	}

	function lower(){
	var impl = getTemplate();

	impl.setup = function(){
	impl.strategy = new guessLower();
	};

	impl.exec();
	}

	function gotIt(){
	alert("Heeeeeeeeee");
	}

	function $(el){
	return document.getElementById(el);
	}

	function updateUi(){
	$("nb").innerText = register.last;

	doTable();
	}

	function createCell(value){
	var cell = document.createElement("td");
	var cellText = document.createTextNode(value);
	cell.appendChild(cellText);
	return cell;
	}

	function doTable(){
	var row = document.createElement("tr");

	row.appendChild(createCell(register.low));
	row.appendChild(createCell(register.high));
	row.appendChild(createCell(register.last));

	$("tbody").appendChild(row);
	}

	//END UI methods

	//GUESS.HTML
	<!DOCTYPE html>
	<html>
	<head>
	<script type="text/javascript" src="./guess.js"></script><!-- SUT -->
	</head>
	<body>
	Pense em um número entre 1 e 100, aperte OK e eu vou adivinhar!<br/>
	<button id="start" onclick="start()">OK</button>
	<p>Seu número é <label id="nb"></label> ?</p>

	<p>
	<button id="higher" onclick="higher();">Meu número é higher</button>
	<button id="lower" onclick="lower();">Meu número é lower</button>
	<button id="gotIt" onclick="gotIt();">Acertou!</button>
	</p>

	<table name="tbl" id="tbl" border="1">
	<thead>
	<tr>
	<td>low</td>
	<td>high</td>
	<td>last</td>
	</tr>
	</thead>
	<tbody id="tbody">
	</tbody>
	</table>
	</body>
	</html>

	//GUESSTESTS.HTML
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>Guess unit tests</title>

	<link rel="stylesheet" type="text/css" href="jasmine/jasmine.css">

	<script type="text/javascript" src="jasmine/jasmine.js"></script>
	<script type="text/javascript" src="jasmine/jasmine-html.js"></script>
	<script type="text/javascript" src="jasmine/boot.js"></script>

	<script type="text/javascript" src="./guess.js"></script><!-- SUT -->

	<script type="text/javascript">
	describe("generic tests", function(){
	it( "register must initialize with 0 as low", function() {
	var r = new Register();
	expect(r.low).toBe(0);
	});

	it( "register must initialize with 100 as high", function() {
	var r = new Register();
	expect(r.high).toBe(100);
	});

	it("initial guess must multiply by 100 and sum 1 - random value", function(){
	spyOn(Math, "random").and.callFake(function(o){
	return 0.4;
	});

	expect(new guessInitial().guess()).toEqual(41);
	expect(Math.random).toHaveBeenCalled();
	});

	it("initial guess must multiply by 100 and sum 1 - edge value 0", function(){
	spyOn(Math, "random").and.callFake(function(o){
	return 0;
	});

	expect(new guessInitial().guess()).toEqual(1);
	expect(Math.random).toHaveBeenCalled();
	});

	it("initial guess must multiply by 100 and sum 1 - edge value 0.99", function(){
	spyOn(Math, "random").and.callFake(function(o){
	return 0.99;
	});

	expect(new guessInitial().guess()).toEqual(100);
	expect(Math.random).toHaveBeenCalled();
	});

	it("guess high must update low register", function(){
	register = new Register();
	register.high = 11;
	register.low = 12;
	register.last = 13;
	new guessHigher().guess();
	expect(register.low).toEqual(register.last);
	});

	it("guess high must be media from high and last", function(){
	register = new Register();
	register.high = 11;
	register.low = 8;
	register.last = 13;
	var nb = new guessHigher().guess();
	expect(nb).toEqual((register.high + register.last)/2);
	});

	it("guess low must update high register", function(){
	register = new Register();
	register.high = 31;
	register.low = 32;
	register.last = 33;
	new guessLower().guess();
	expect(register.high).toEqual(register.last);
	});

	it("guess low must be media from low and last", function(){
	register = new Register();
	register.high = 8;
	register.low = 11;
	register.last = 13;
	var nb = new guessLower().guess();
	expect(nb).toEqual((register.low + register.last)/2);
	});

	});
	</script>
	</head>
	<body></body>
	</html>