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scoobycoderscoobycoder
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initial commit of vending machine kata in java, needs refactoring
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‎bin/vending/VendingMachine.class

3.93 KB
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‎bin/vending/VendingMachineTests.class

4.86 KB
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‎src/vending/VendingMachine.java

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package vending;
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import java.text.NumberFormat;
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import java.util.ArrayList;
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public class VendingMachine {
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Double currentAmount = 0.0;
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Double coinReturnAmount = 0.0;
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ArrayList<Double> coinsList = new ArrayList<Double>();
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ArrayList<Double> returnSlotCoins = new ArrayList<Double>();
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String display = "";
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ArrayList<String> itemBinList = new ArrayList<String>();
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public ArrayList<Double> returnCoins() {
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setCoinReturnAmount(getCurrentAmount());
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setCurrentAmount(0.00);
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returnSlotCoins.addAll(coinsList);
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return coinsList;
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}
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public void insertPenny() {
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setCoinReturnAmount(0.01);
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returnSlotCoins.add((Double)0.01);
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}
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public void insertNickel() {
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setCurrentAmount(getCurrentAmount() + 0.05);
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updateDisplay();
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coinsList.add((Double)0.05);
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}
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public void insertDime() {
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setCurrentAmount(getCurrentAmount() + 0.10);
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updateDisplay();
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coinsList.add((Double)0.10);
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}
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public void insertQuarter() {
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setCurrentAmount(getCurrentAmount() + 0.25);
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updateDisplay();
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coinsList.add((Double)0.25);
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}
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public void sodaButton() {
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if (getCurrentAmount() >= 1.25){
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updateChangeAmount();
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itemBinList.add("Soda");
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}
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}
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public void chipsButton() {
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if (getCurrentAmount() >= 0.75){
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updateChangeAmount();
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itemBinList.add("Chips");
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}
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}
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public void candyButton() {
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if (getCurrentAmount() >= 0.50){
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updateChangeAmount();
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itemBinList.add("Candy");
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}
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}
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// Helper Methods
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private void updateDisplay() {
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NumberFormat nf = NumberFormat.getInstance();
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nf.setMinimumFractionDigits(2);
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String stringConversion = nf.format(getCurrentAmount());
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setDisplay("$" + stringConversion);
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}
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private void updateChangeAmount() {
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if (getCurrentAmount() >= 1.25) {
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setCurrentAmount(getCurrentAmount() - 1.25);
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}
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}
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//Getters / Setters
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public Double getCoinReturnAmount() {
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return coinReturnAmount;
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}
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public void setCoinReturnAmount(Double coinReturnAmount) {
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this.coinReturnAmount = coinReturnAmount;
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}
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public Double getCurrentAmount() {
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return currentAmount;
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}
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public void setCurrentAmount(Double currentAmount) {
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this.currentAmount = currentAmount;
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}
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public ArrayList<Double> getReturnSlotCoins() {
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return returnSlotCoins;
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}
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public void setReturnSlotCoins(ArrayList<Double> returnSlotCoins) {
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this.returnSlotCoins = returnSlotCoins;
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}
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public String getDisplay() {
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return display;
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}
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public void setDisplay(String display) {
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this.display = display;
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}
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public ArrayList<String> getItemBinList() {
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return itemBinList;
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}
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public void setItemBinList(ArrayList<String> itemBinList) {
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this.itemBinList = itemBinList;
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}
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}

‎test/vending/VendingMachineTests.java

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package vending;
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import static org.junit.Assert.assertEquals;
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import java.util.ArrayList;
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import org.junit.Before;
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import org.junit.Ignore;
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import org.junit.Test;
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public class VendingMachineTests {
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private VendingMachine vendingMachine;
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@Before
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public void setUp() {
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vendingMachine = new VendingMachine();
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}
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@Test
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public void shouldAcceptQuarter() {
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vendingMachine.insertQuarter();
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assertEquals((Double) 0.25, vendingMachine.getCurrentAmount());
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}
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@Test
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public void shouldResetCurrentAmountEqualToZeroWhenReturnCoinsIsPressed() {
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vendingMachine.setCurrentAmount(0.25);
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vendingMachine.returnCoins();
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assertEquals((Double) 0.0, vendingMachine.getCurrentAmount());
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}
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@Test
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public void shouldNotAcceptPenny() {
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vendingMachine.insertQuarter();
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vendingMachine.insertPenny();
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assertEquals((Double) 0.25, vendingMachine.getCurrentAmount());
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assertEquals((Double) 0.01, vendingMachine.getCoinReturnAmount());
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}
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@Test
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public void shouldAcceptNickel() {
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vendingMachine.insertNickel();
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assertEquals((Double) 0.05, vendingMachine.getCurrentAmount());
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}
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@Test
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public void shouldAcceptDime() {
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vendingMachine.insertDime();
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assertEquals((Double) 0.10, vendingMachine.getCurrentAmount());
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}
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@Test
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public void pressingCoinReturnShouldReturnExactCoinsInserted() {
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insertFiftyCentsInQuarters();
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vendingMachine.insertNickel();
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ArrayList<Double> expectedCoinList = new ArrayList<Double>();
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expectedCoinList.add((Double) 0.25);
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expectedCoinList.add((Double) 0.25);
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expectedCoinList.add((Double) 0.05);
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assertEquals(expectedCoinList, vendingMachine.returnCoins());
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}
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@Test
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public void returnCoinSlotShouldHoldAllCoinsReturned() {
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vendingMachine.insertPenny();
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insertFiftyCentsInQuarters();
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vendingMachine.insertNickel();
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ArrayList<Double> expectedCoinList = new ArrayList<Double>();
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expectedCoinList.add((Double) 0.01);
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expectedCoinList.add((Double) 0.25);
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expectedCoinList.add((Double) 0.25);
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expectedCoinList.add((Double) 0.05);
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vendingMachine.returnCoins();
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assertEquals(expectedCoinList, vendingMachine.getReturnSlotCoins());
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}
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@Test
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public void currentAmountShouldContinueToSumAllChangePutInMachine() {
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vendingMachine.insertPenny();
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insertFiftyCentsInQuarters();
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vendingMachine.insertNickel();
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assertEquals((Double) 0.55, vendingMachine.getCurrentAmount());
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}
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@Test
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public void displayShouldShowAmountOfCurrencyInsertedIntoMachine() {
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insertDollarInQuarters();
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vendingMachine.insertDime();
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vendingMachine.insertDime();
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vendingMachine.insertNickel();
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assertEquals("$1.25", vendingMachine.getDisplay());
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}
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@Test
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public void itemBinShouldHoldSodaWhenSodaButtonIsPressed() {
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insertDollarInQuarters();
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insertFiftyCentsInQuarters();
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ArrayList<String> expectedItemBinList = new ArrayList<String>();
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expectedItemBinList.add("Soda");
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vendingMachine.sodaButton();
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assertEquals(expectedItemBinList, vendingMachine.getItemBinList());
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}
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@Test
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public void vendingMachineShouldNotVendSodaIfChangeIsInsufficent() {
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insertDollarInQuarters();
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ArrayList<String> expectedItemBinList = new ArrayList<String>();
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vendingMachine.sodaButton();
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assertEquals(expectedItemBinList, vendingMachine.getItemBinList());
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}
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@Test
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public void itemBinShouldHoldChipsWhenChipsButtonIsPressed() {
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insertDollarInQuarters();
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ArrayList<String> expectedItemBinList = new ArrayList<String>();
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expectedItemBinList.add("Chips");
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vendingMachine.chipsButton();
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assertEquals(expectedItemBinList, vendingMachine.getItemBinList());
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}
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@Test
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public void vendingMachineShouldNotVendChipsIfChangeIsInsufficent() {
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insertFiftyCentsInQuarters();
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ArrayList<String> expectedItemBinList = new ArrayList<String>();
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vendingMachine.chipsButton();
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assertEquals(expectedItemBinList, vendingMachine.getItemBinList());
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}
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@Test
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public void itemBinShouldHoldCandyWhenCandyButtonIsPressed() {
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insertFiftyCentsInQuarters();
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ArrayList<String> expectedItemBinList = new ArrayList<String>();
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expectedItemBinList.add("Candy");
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vendingMachine.candyButton();
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assertEquals(expectedItemBinList, vendingMachine.getItemBinList());
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}
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@Test
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public void vendingMachineShouldNotVendCandyIfChangeIsInsufficent() {
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VendingMachine vendingMachine = new VendingMachine();
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vendingMachine.insertQuarter();
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vendingMachine.insertNickel();
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ArrayList<String> expectedItemBinList = new ArrayList<String>();
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vendingMachine.candyButton();
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assertEquals(expectedItemBinList, vendingMachine.getItemBinList());
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}
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@Test
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public void itemBinShouldHoldCandySodaChipsIfAllArePressed() {
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insertDollarInQuarters();
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insertDollarInQuarters();
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insertDollarInQuarters();
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vendingMachine.insertQuarter();
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ArrayList<String> expectedItemBinList = new ArrayList<String>();
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expectedItemBinList.add("Candy");
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expectedItemBinList.add("Soda");
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expectedItemBinList.add("Chips");
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vendingMachine.candyButton();
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vendingMachine.sodaButton();
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vendingMachine.chipsButton();
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assertEquals(expectedItemBinList, vendingMachine.getItemBinList());
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}
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@Test
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public void machineShouldMakeChangeIfTooMuchMoneyPaidForSoda() {
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insertDollarInQuarters();
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insertFiftyCentsInQuarters();
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vendingMachine.sodaButton();
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vendingMachine.returnCoins();
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assertEquals((Double) 0.25, vendingMachine.getCoinReturnAmount());
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}
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private void insertDollarInQuarters() {
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insertFiftyCentsInQuarters();
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insertFiftyCentsInQuarters();
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}
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private void insertFiftyCentsInQuarters() {
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vendingMachine.insertQuarter();
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vendingMachine.insertQuarter();
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}
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}

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