Got expected outcome

ZachResults.md

@@ -0,0 +1,15 @@
+***
+Simulation of 2 dice tossed for 1000000 times.
+***
+
+2 :   27389:  0.03  
+3 :   55543:  0.06  
+4 :   83925:  0.08  
+5 :   110847:  0.11  
+6 :   139083:  0.14  
+7 :   166554:  0.17  
+8 :   139119:  0.14  
+9 :   110969:  0.11  
+10 :   83486:  0.08  
+11 :   55431:  0.06  
+12 :   27654:  0.03  

pom.xml

@@ -7,6 +7,14 @@
     <groupId>com.zipcodewilmington</groupId>
     <artifactId>Dicey-Lab</artifactId>
     <version>1.0-SNAPSHOT</version>
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.13.1</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
 
 
 </project>

src/main/java/Bins.java

@@ -1,4 +1,39 @@
+import java.util.*;
 
 public class Bins {
 
+    private int startingBin;
+    private int endingBin;
+    Integer[] diceRolls;
+
+    public Bins(int startingBin, int endingBin) {
+        this.startingBin = startingBin;
+        this.endingBin = endingBin;
+        diceRolls = new Integer[endingBin - (startingBin - 1)];
+        Arrays.fill(diceRolls, 0);
+    }
+
+    public int getBin(int binNumber) {
+        return diceRolls[binNumber - startingBin];
+    }
+
+    public void incrementBin(int binNumber) {
+        diceRolls[binNumber - startingBin]++;
+    }
+
+    public int getStartingBin() {
+        return startingBin;
+    }
+
+    public void setStartingBin(int startingBin) {
+        this.startingBin = startingBin;
+    }
+
+    public int getEndingBin() {
+        return endingBin;
+    }
+
+    public void setEndingBin(int endingBin) {
+        this.endingBin = endingBin;
+    }
 }

src/main/java/Dice.java

@@ -1,4 +1,27 @@
+import java.util.Random;
+
 public class Dice {
 
+    private int numberOfDice;
+
+    public Dice(Integer numberOfDice) {
+        this.numberOfDice = numberOfDice;
+    }
+
+    public Integer tossAndSum() {
+        int sum = 0;
+        for (int i = 0; i < numberOfDice; i++) {
+            sum += (int)(Math.random() * 6 + 1);
+        }
+        return sum;
+
+    }
+
+    public Integer getNumberOfDice() {
+        return numberOfDice;
+    }
 
+    public void setNumberOfDice(Integer numberOfDice) {
+        this.numberOfDice = numberOfDice;
+    }
 }

src/main/java/Simulation.java

@@ -1,5 +1,48 @@
+import java.util.*;
+
 public class Simulation {
 
+    private int numberOfDies;
+    private int numberOfTosses;
+
+    public Simulation(Integer numberOfDies, Integer numberOfTosses) {
+        this.numberOfDies = numberOfDies;
+        this.numberOfTosses = numberOfTosses;
+    }
+
+    public Integer[] runSimulation() {
+        Dice die = new Dice(numberOfDies);
+        Bins results = new Bins(numberOfDies, numberOfDies * 6);
+        for (int i = 0; i < numberOfTosses; i++) {
+            int diceRoll = die.tossAndSum();
+            results.incrementBin(diceRoll);
+        }
+        return results.diceRolls;
+    }
+
+    public void printResults() {
+        Integer[] diceRolls = runSimulation();
+        StringBuilder builder = new StringBuilder();
+        System.out.printf("***\nSimulation of %s dice tossed for %s times.\n***\n\n", numberOfDies, numberOfTosses);
+        for (int i = 0; i < diceRolls.length; i++) {
+            for (int j = 0; j < (diceRolls[i] / numberOfTosses) * 100; i++) {
+                builder.append("*");
+            }
+            System.out.printf("%s :   %s:  %.2f  %s\n", i + numberOfDies, diceRolls[i], (double)diceRolls[i] / numberOfTosses, builder.toString());
+            builder.delete(0, builder.length());
+        }
+    }
+
+    public Integer getNumberOfDies() {
+        return numberOfDies;
+    }
 
+    public Integer getNumberOfTosses() {
+        return numberOfTosses;
+    }
 
+    public static void main(String[] args) {
+        Simulation simulation = new Simulation(2, 1000000);
+        simulation.printResults();
+    }
 }

src/test/java/BinsTest.java

@@ -0,0 +1,22 @@
+import org.junit.Assert;
+import org.junit.Test;
+
+public class BinsTest {
+
+    @Test
+    public void constructorTest() {
+        // Given
+        Integer expectedStartingBin = 2;
+        Integer expectedEndingBin = 12;
+        Bins results = new Bins(expectedStartingBin, expectedEndingBin);
+
+
+        // When
+        Integer actualStartingBin = results.getStartingBin();
+        Integer actualEndingBin = results.getEndingBin();
+
+        // Then
+        Assert.assertEquals(expectedStartingBin, actualStartingBin);
+        Assert.assertEquals(expectedEndingBin, actualEndingBin);
+    }
+}

src/test/java/DiceTest.java

@@ -0,0 +1,46 @@
+import org.junit.Assert;
+import org.junit.Test;
+
+public class DiceTest {
+
+    @Test
+    public void tossAndSumTest() {
+        // Given
+        Integer numberOfDice = 2;
+
+        // When
+        Dice dice = new Dice(numberOfDice);
+        Integer sumOfDice = dice.tossAndSum();
+
+        // Then
+        Assert.assertTrue(sumOfDice >= numberOfDice && sumOfDice <= numberOfDice * 6);
+    }
+
+    @Test
+    public void tossAndSumTest1() {
+        // Given
+        Integer numberOfDice = 4;
+
+        // When
+        Dice dice = new Dice(numberOfDice);
+        Integer sumOfDice = dice.tossAndSum();
+
+        // Then
+        Assert.assertTrue(sumOfDice >= numberOfDice && sumOfDice <= numberOfDice * 6);
+    }
+
+    @Test
+    public void constructorTest() {
+        // Given
+        Integer expectedNumberOfDice = 4;
+        Dice dice = new Dice(expectedNumberOfDice);
+
+
+        // When
+        Integer actualNumberOfDice = dice.getNumberOfDice();
+
+        // Then
+        Assert.assertEquals(expectedNumberOfDice, actualNumberOfDice);
+    }
+
+}

src/test/java/SimulationTest.java

@@ -0,0 +1,22 @@
+import org.junit.Assert;
+import org.junit.Test;
+
+public class SimulationTest {
+
+    @Test
+    public void constructorTest() {
+        // Given
+        Integer expectedNumberOfDies = 2;
+        Integer expectedNumberOfTosses = 1000000;
+
+
+        // When
+        Simulation simulation = new Simulation(expectedNumberOfDies, expectedNumberOfTosses);
+        Integer actualNumberOfDies = simulation.getNumberOfDies();
+        Integer actualNumberOfTosses = simulation.getNumberOfTosses();
+
+        // Then
+        Assert.assertEquals(expectedNumberOfDies, actualNumberOfDies);
+        Assert.assertEquals(expectedNumberOfTosses, actualNumberOfTosses);
+    }
+}