Java version

japaz/pom.xml

@@ -0,0 +1,19 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.japaz.katas</groupId>
+  <artifactId>Abril-Bowling</artifactId>
+  <version>0.0.1-SNAPSHOT</version>
+  <dependencies>
+  	<dependency>
+  		<groupId>junit</groupId>
+  		<artifactId>junit</artifactId>
+  		<version>4.8.2</version>
+  		<type>jar</type>
+  		<scope>test</scope>
+  	</dependency>
+  </dependencies>
+  <dependencyManagement>
+  	<dependencies>
+  	</dependencies>
+  </dependencyManagement>
+</project>

japaz/src/main/java/com/japaz/katas/ab/BowlingScorer.java

@@ -0,0 +1,101 @@
+package com.japaz.katas.ab;
+
+public class BowlingScorer {
+	private int currentFrame = 0;
+	private boolean secondRollInAFrame = false;
+	private String sequenceOfRolls;
+	private int score;
+
+	public BowlingScorer(String sequenceOfRolls) {
+		currentFrame = 0;
+		secondRollInAFrame = false;
+		score = 0;
+		this.sequenceOfRolls = sequenceOfRolls;  
+	}
+
+	public int calculateScore() {
+		int currentRoll = 0;
+
+		while (currentFrame < 10) {
+			int rollValue = sequenceOfRolls.charAt(currentRoll);
+
+			switch(rollValue) {
+			case 'X' :  score+=10;
+						processNextRoll(currentRoll);
+						processTheRollAfterNext(currentRoll);
+						endFrame();
+						break;
+			case '9' :
+			case '8' :
+			case '7' :
+			case '6' :
+			case '5' :
+			case '4' :
+			case '3' :
+			case '2' :
+			case '1' :
+			case '0' :  processNumericValue(rollValue);
+						if (secondRollInAFrame) {
+							endFrame();
+						} else {
+							secondRollInAFrame = true;
+						}
+						break;
+			case '/' :  score=score+10-Character.digit(sequenceOfRolls.charAt(currentRoll-1),10);
+						processNextRoll(currentRoll);
+						endFrame();
+						break;
+			case '-' :  
+					    endFrame();
+						break;
+			}
+			currentRoll++;
+		}
+		return score;
+	}
+
+	private void processNextRoll(int currentRoll) {
+		int rollValue = sequenceOfRolls.charAt(currentRoll+1);
+		processXOrNumeric(rollValue);
+	}
+
+	private void processTheRollAfterNext(int currentRoll) {
+		int rollValue = sequenceOfRolls.charAt(currentRoll+2);
+		processXOrNumeric(rollValue);
+		processSlash(currentRoll, rollValue);
+	}
+
+	private void processXOrNumeric(int rollValue) {
+		switch (rollValue) {
+		case 'X' : score+=10;
+					break;
+		case '9' :
+		case '8' :
+		case '7' :
+		case '6' :
+		case '5' :
+		case '4' :
+		case '3' :
+		case '2' :
+		case '1' :
+		case '0' :  processNumericValue(rollValue);
+					break;
+		}
+	}
+
+	private void processNumericValue(int rollValue) {
+		score+=Character.digit(rollValue, 10);
+	}
+
+	private void processSlash(int currentRoll, int rollValue) {
+		switch (rollValue) {
+		case '/' : score=score+10-Character.digit(sequenceOfRolls.charAt(currentRoll+1), 10);
+					break;
+		}
+	}
+
+	private void endFrame() {
+		currentFrame++;
+		secondRollInAFrame = false;
+	}
+}

japaz/src/test/java/com/japaz/katas/ab/TestFrameScorer.java

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+package com.japaz.katas.ab;
+
+import junit.framework.Assert;
+
+import org.junit.Before;
+import org.junit.Test;
+
+public class TestFrameScorer {
+	@Test
+	public void test_12_Strikes_Is_300() {
+		String sequenceOfRolls = "XXXXXXXXXXXX";
+		int score = new BowlingScorer(sequenceOfRolls).calculateScore();
+		Assert.assertEquals("12 Strikes must be 300 points", 300, score);
+	}
+
+	@Test
+	public void test_10_Pairs_Of_9_And_Miss_Is_90() {
+		String sequenceOfRolls = "9-9-9-9-9-9-9-9-9-9-";
+		int score = new BowlingScorer(sequenceOfRolls).calculateScore();
+		Assert.assertEquals("10 Pairs of 9 and miss must be 90", 90, score);
+	}
+
+	@Test
+	public void test_10_Pairs_Of_5_And_Spare_With_Final_5_Is_150() {
+		String sequenceOfRolls = "5/5/5/5/5/5/5/5/5/5/5";
+		int score = new BowlingScorer(sequenceOfRolls).calculateScore();
+		Assert.assertEquals("10 Pairs of 5 and spare, with a final 5 must be 150", 150, score);
+	}
+
+	@Test
+	public void test_Strikes_Must_Count_Next_Two_Shoots_Double() {
+		String sequenceOfRolls = "X535-5-5-5-5-5-5-5-";
+		int score = new BowlingScorer(sequenceOfRolls).calculateScore();
+		Assert.assertEquals(66, score);
+	}
+
+	@Test
+	public void test_Strikes_Must_Count_Next_Two_Shoots_Double_Even_A_Miss() {
+		String sequenceOfRolls = "X5-5-5-5-5-5-5-5-5-";
+		int score = new BowlingScorer(sequenceOfRolls).calculateScore();
+		Assert.assertEquals(60, score);
+	}
+
+	@Test
+	public void test_Strikes_Must_Count_Next_Two_Shoots_Double_Even_An_Spare() {
+		String sequenceOfRolls = "X5/5-5-5-5-5-5-5-5-";
+		int score = new BowlingScorer(sequenceOfRolls).calculateScore();
+		Assert.assertEquals(75, score);
+	}
+
+	@Test
+	public void test_Strikes_Must_Count_Next_Two_Shoots_Double_Even_A_Miss_At_The_Last() {
+		String sequenceOfRolls = "1-1-1-1-1-1-1-1-1-X5-";
+		int score = new BowlingScorer(sequenceOfRolls).calculateScore();
+		Assert.assertEquals(24, score);
+	}
+
+	@Test
+	public void test_Strikes_Must_Count_Next_Two_Shoots_Double_Even_An_Spare_At_The_Last() {
+		String sequenceOfRolls = "1-1-1-1-1-1-1-1-1-X5/";
+		int score = new BowlingScorer(sequenceOfRolls).calculateScore();
+		Assert.assertEquals(29, score);
+	}
+}