Kata bowling excercise. create a bowling game using 1 game class with 2 methods: roll(pins:int) and score():int . call score() after all rolls are completed.

Game.as

package {
import flash.utils.Dictionary;

import spark.components.TextArea;

public class Game {
	private const TOTAL_LABEL:String = "Total: ";
	private const GUTTER_LABEL:String = "Gutter!";
	private const OPEN_FRAME:String = "You got ";
	private const FRAME_LABEL:String = "Frame: ";
	private const STRIKE_LABEL:String = "Strike!";
	private const SPARE_LABEL:String = "Spare!";
	private const FRAMES_TOTAL:uint = 10;
	private const PINS_TOTAL:uint = 10;

	private var display:Function = function (frame:uint, roll:uint, result:String):void {
		output.text += FRAME_LABEL + frame + " - roll " + roll + ": " + result + "\n";
	}
	private var currentRoll:uint = 1;
	private var currentFrame:uint = 1;
	private var scoreData:Dictionary = new Dictionary();
	private var finalScore:uint = 0;
	private var output:TextArea;

	public var currentPinsRemaining:uint = 10;

	public function Game(output:TextArea) {
		this.output = output;
	}

	public function roll(pins:int):void {
		if (currentFrame < FRAMES_TOTAL){ // Normal frame logic
			if (currentRoll == 1) {    // 1st roll for the current frame.
				scoreData[currentFrame] = []; // create a score node for the frame
				currentPinsRemaining = PINS_TOTAL - pins;
				scoreData[currentFrame][0] = pins
				if (currentPinsRemaining == 0){   // STRIKE!!
					display(currentFrame, currentRoll, STRIKE_LABEL);
					scoreData[currentFrame][0] = pins; // store roll result
					currentFrame++;             //increment current frame.
					currentRoll = 1;
					currentPinsRemaining = PINS_TOTAL; // reset pins
				}else if (scoreData[currentFrame][0] == 0){    // gutter
					display(currentFrame, currentRoll, GUTTER_LABEL);
					currentRoll++;
				}else {
					display(currentFrame, currentRoll, OPEN_FRAME + pins);
					currentRoll++;
				}
			}else{  // 2nd roll
				currentPinsRemaining -= pins;
				scoreData[currentFrame][1] = pins; // store roll result
				if (currentPinsRemaining == 0) { // spare
					display(currentFrame, currentRoll, SPARE_LABEL);
				}else if (pins == 0){    // gutter
					display(currentFrame, currentRoll, GUTTER_LABEL);
				}else {
					display(currentFrame, currentRoll, OPEN_FRAME + pins);
				}
				currentRoll = 1; // reset roll
				currentPinsRemaining = PINS_TOTAL;   // reset pins
				currentFrame++;//increment current frame.
			}
		}
		else if (currentFrame == 10) // 10th frame logic
		{
			if (currentRoll == 1) {
				scoreData[currentFrame] = []; // create a score node for the 10th frame
				currentPinsRemaining = PINS_TOTAL - pins;
				scoreData[currentFrame][0] = pins; // store roll result
				if (pins == 10){   // STRIKE!!
					currentPinsRemaining = PINS_TOTAL; // Strike in the 10 frame, 1st ball. Reset pins.
					display(currentFrame, currentRoll, STRIKE_LABEL);
				}else if (pins == 0) {
					display(currentFrame, currentRoll, GUTTER_LABEL);
				}else {
					display(currentFrame, currentRoll, OPEN_FRAME + pins);
				}
				currentRoll++;
			}
			else if (currentRoll == 2)  // 2nd roll
			{
				scoreData[currentFrame][1] = pins; // store roll result
				if (scoreData[currentFrame][0] != 10){   // if no strike on 1st roll
					currentPinsRemaining -= pins;
					if (currentPinsRemaining == 0) {// we cleaned up a spare from 1st frame
						currentPinsRemaining = PINS_TOTAL; // Reset pins.
						display(currentFrame, currentRoll, SPARE_LABEL);
						currentRoll++; // allow another roll
					} else {
						// did not cleanup spare, no 3rd roll!
						display(currentFrame, currentRoll, OPEN_FRAME + pins);
						currentFrame++; // kill game by setting frame to 11
						output.text += TOTAL_LABEL + score().toString();
					}
				} else {     // "clean" 2nd roll
					if (pins == 10){   // Strike again!
						currentPinsRemaining = PINS_TOTAL; // Reset pins.
						display(currentFrame, currentRoll, STRIKE_LABEL);
					} else {
						currentPinsRemaining -= pins; // update remaining pins
						display(currentFrame, currentRoll, OPEN_FRAME + pins);
					}
					currentRoll++; // allow 3rd roll
				}
			}
			else  // 3rd roll
			{
				scoreData[currentFrame][2] = pins; // store roll result
				if (scoreData[currentFrame][1] != 10 && scoreData[currentFrame][0] + scoreData[currentFrame][1] != 10)   // if no strike or spare on 2nd roll
				{
					currentPinsRemaining -= pins;
					if (currentPinsRemaining == 0) {// we cleaned up a spare from 2nd frame
						display(currentFrame, currentRoll, SPARE_LABEL);
					} else {// did not cleanup spare, no 3rd roll!
						display(currentFrame, currentRoll, OPEN_FRAME + pins);
					}
				} else {   // "clean" 3rd roll
					if (pins == 10){   // Strike again!!
						display(currentFrame, currentRoll, STRIKE_LABEL);
					} else {
						display(currentFrame, currentRoll, OPEN_FRAME + pins);
					}
				}
				currentFrame++; // kill game by setting frame to 11
				output.text += TOTAL_LABEL + score().toString();
			}
		}
	}

	public function score():int {
		var clearedLastFrame:Boolean = false;
		for each(var node:Array in scoreData) {
			var frameScore:uint = 0;
			if (clearedLastFrame) {
				frameScore += node[0];
			}
			if (node[0] != 10) {
				frameScore += node[0] + node[1];
			} else {
				frameScore += node[0];
			}
			finalScore += frameScore;
			if (frameScore == 10) {
				clearedLastFrame = true;
			} else {
				clearedLastFrame = false;
			}
		}
		return finalScore;
	}
}
}

kata1.mxml

<?xml version="1.0"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark"
                       applicationComplete="init()">
    <fx:Script><![CDATA[
        import mx.controls.Alert;

        private var game:Game;

        protected function init():void {
            output.text = "";
            game = new Game(output);
        }
        ]]></fx:Script>
    <s:layout><s:VerticalLayout></s:VerticalLayout></s:layout>
   <s:TextArea id="output" width="400" height="300" />
    <s:Button label="Roll Random" click="game.roll(Math.random()*(game.currentPinsRemaining+1))"  />
    <s:Button label="Roll Perfect" click="game.roll(game.currentPinsRemaining)"  />
    <s:Button label="New Game" click="init()"  />
</s:WindowedApplication>