[로또] 박성우 제출합니다.

src/main/java/lotto/Application.java

@@ -1,7 +1,55 @@
 package lotto;
 
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import lotto.domain.Lotto;
+import lotto.domain.Money;
+import lotto.domain.WinNumbers;
+import lotto.domain.lottonumbercreator.AutoLottoNumberCreator;
+import lotto.domain.lottonumbercreator.LottoNumberCreator;
+import lotto.domain.lottorank.LottoRank;
+import lotto.domain.lottorank.LottoRanks;
+import lotto.view.InputView;
+
 public class Application {
+    private static final LottoNumberCreator CREATOR = new AutoLottoNumberCreator();
+
     public static void main(String[] args) {
-        // TODO: 프로그램 구현
+        System.out.println("구입금액을 입력해 주세요.");
+
+        final Money money = new Money(InputView.requestInteger());
+        final int lottoCount = money.getLottoCount();
+        System.out.println(String.format("\n%d개를 구매했습니다.", lottoCount));
+
+        final List<Lotto> lottos = getAutoLottos(lottoCount);
+        lottos.forEach(System.out::println);
+
+        System.out.println("\n당첨 번호를 입력해 주세요.");
+        final Lotto winLotto = new Lotto(InputView.requestWinNumbers());
+
+        System.out.println("\n보너스 번호를 입력해 주세요.");
+        int bonusBall = InputView.requestInteger();
+
+        final WinNumbers winNumbers = new WinNumbers(winLotto, bonusBall);
+        final LottoRanks lottoRanks = getLottoRanks(lottos, winNumbers);
+
+        System.out.println("당첨 통계\n---");
+        System.out.println(lottoRanks);
+        System.out.println(String.format("총 수익률은 %.1f%%입니다.", money.getRateOfProfit(lottoRanks.getProfit())));
+    }
+
+    private static List<Lotto> getAutoLottos(int lottoCount) {
+        return Stream.generate(() -> Lotto.from(CREATOR))
+                .limit(lottoCount)
+                .collect(Collectors.toList());
+    }
+
+    private static LottoRanks getLottoRanks(List<Lotto> lottos, WinNumbers winNumbers) {
+        final List<LottoRank> ranks = lottos.stream()
+                .map(lotto -> LottoRank.calculateRank(winNumbers, lotto))
+                .collect(Collectors.toList());
+
+        return LottoRanks.from(ranks);
     }
 }

src/main/java/lotto/domain/Lotto.java

@@ -0,0 +1,75 @@
+package lotto.domain;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.stream.Collectors;
+import lotto.domain.lottonumbercreator.LottoNumberCreator;
+
+public class Lotto {
+    private static final int LOTTO_NUMBERS_SIZE = 6;
+    private static final int MIN_LOTTO_NUMBER = 1;
+    private static final int MAX_LOTTO_NUMBER = 45;
+
+    private final List<Integer> numbers;
+
+    public Lotto(List<Integer> numbers) {
+        validateSize(numbers);
+        validateDuplicated(numbers);
+        validateNumbersRange(numbers);
+        this.numbers = numbers;
+    }
+
+    public static Lotto from(LottoNumberCreator creator) {
+        return new Lotto(creator.create(MIN_LOTTO_NUMBER, MAX_LOTTO_NUMBER, LOTTO_NUMBERS_SIZE));
+    }
+
+    private void validateSize(List<Integer> numbers) {
+        if (numbers.size() != LOTTO_NUMBERS_SIZE) {
+            throw new IllegalArgumentException(String.format("[ERROR] 로또 숫자의 개수는 %d일 수 없습니다.", numbers.size()));
+        }
+    }
+
+    private void validateDuplicated(List<Integer> numbers) {
+        if (numbers.size() != new HashSet<>(numbers).size()) {
+            throw new IllegalArgumentException("[ERROR] 중복되는 숫자가 존재합니다.");
+        }
+    }
+
+    private void validateNumbersRange(List<Integer> numbers) {
+        if (!numbers.stream().allMatch(this::isInRange)) {
+            throw new IllegalArgumentException(
+                    String.format("[ERROR] %d ~ %d 범위를 넘어가는 숫자가 존재합니다.", MIN_LOTTO_NUMBER, MAX_LOTTO_NUMBER)
+            );
+        }
+    }
+
+    private boolean isInRange(int bonusBall) {
+        return bonusBall >= MIN_LOTTO_NUMBER && bonusBall <= MAX_LOTTO_NUMBER;
+    }
+
+    public boolean isPossible(int bonusBall) {
+        final boolean isInRange = isInRange(bonusBall);
+        final boolean isNotLottoNumber = !numbers.contains(bonusBall);
+
+        return isInRange && isNotLottoNumber;
+    }
+
+    public int calculateSameLottoNumber(Lotto other) {
+        return (int) other.numbers.stream()
+                .filter(this::contain)
+                .count();
+    }
+
+    public boolean contain(Integer number) {
+        return this.numbers.contains(number);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("[%s]",
+                this.numbers.stream()
+                .sorted()
+                .map(number -> Integer.toString(number))
+                .collect(Collectors.joining(", ")));
+    }
+}

src/main/java/lotto/domain/Money.java

@@ -0,0 +1,25 @@
+package lotto.domain;
+
+public class Money {
+    private static final int MIN_VALUE = 1000;
+    private final int value;
+
+    public Money(int value) {
+        validate(value);
+        this.value = value;
+    }
+
+    private void validate(int value) {
+        if (value < MIN_VALUE || value % MIN_VALUE != 0) {
+            throw new IllegalArgumentException(String.format("[ERROR] 금액은 %d원일 수 없습니다.", value));
+        }
+    }
+
+    public int getLottoCount() {
+        return this.value / MIN_VALUE;
+    }
+
+    public double getRateOfProfit(int profit) {
+        return (double) profit * 100 / value;
+    }
+}

src/main/java/lotto/domain/WinNumbers.java

@@ -0,0 +1,28 @@
+package lotto.domain;
+
+public class WinNumbers {
+
+    private final Lotto lotto;
+
+    private final int bonusBall;
+
+    public WinNumbers(Lotto lotto, int bonusBall) {
+        validateBonusBall(lotto, bonusBall);
+        this.lotto = lotto;
+        this.bonusBall = bonusBall;
+    }
+
+    private void validateBonusBall(Lotto lotto, int bonusBall) {
+        if (!lotto.isPossible(bonusBall)) {
+            throw new IllegalArgumentException(String.format("[ERROR] %d는 보너스 볼이 될 수 없습니다.", bonusBall));
+        }
+    }
+
+    public int calculateSameLottoNumber(Lotto lotto) {
+        return this.lotto.calculateSameLottoNumber(lotto);
+    }
+
+    public boolean matchBonus(Lotto lotto) {
+        return lotto.contain(bonusBall);
+    }
+}

src/main/java/lotto/domain/lottonumbercreator/AutoLottoNumberCreator.java

@@ -0,0 +1,11 @@
+package lotto.domain.lottonumbercreator;
+
+import camp.nextstep.edu.missionutils.Randoms;
+import java.util.List;
+
+public class AutoLottoNumberCreator implements LottoNumberCreator{
+    @Override
+    public List<Integer> create(int minLottoNumber, int maxLottoNumber, int lottoNumbersSize) {
+        return Randoms.pickUniqueNumbersInRange(minLottoNumber, maxLottoNumber, lottoNumbersSize);
+    }
+}

src/main/java/lotto/domain/lottonumbercreator/LottoNumberCreator.java

@@ -0,0 +1,7 @@
+package lotto.domain.lottonumbercreator;
+
+import java.util.List;
+
+public interface LottoNumberCreator {
+    List<Integer> create(int minLottoNumber, int maxLottoNumber, int lottoNumbersSize);
+}

src/main/java/lotto/domain/lottorank/LottoRank.java

@@ -0,0 +1,43 @@
+package lotto.domain.lottorank;
+
+import java.util.Arrays;
+import lotto.domain.Lotto;
+import lotto.domain.WinNumbers;
+
+public enum LottoRank {
+    FIRST(2_000_000_000, 6, false),
+    SECOND(30_000_000, 5,true),
+    THIRD(1_500_000, 5, false),
+    FOURTH(50_000, 4, false),
+    FIFTH(5_000, 3, false),
+    OTHER(0, 0, false);
+
+
+    private final int prize;
+    private final int count;
+    private final boolean bonus;
+
+    LottoRank(int prize, int count, boolean bonus) {
+        this.prize = prize;
+        this.count = count;
+        this.bonus = bonus;
+    }
+
+    public static LottoRank calculateRank(WinNumbers winNumbers, Lotto lotto) {
+        return Arrays.stream(LottoRank.values())
+                .filter(rank -> rank.count == winNumbers.calculateSameLottoNumber(lotto))
+                .filter(rank -> !rank.bonus || winNumbers.matchBonus(lotto))
+                .findAny()
+                .orElse(LottoRank.OTHER);
+    }
+
+
+    public int getPrize() {
+        return prize;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%d개 일치%s (%,d원)", this.count, this.bonus ? ", 보너스 볼 일치" : "", this.prize);
+    }
+}

src/main/java/lotto/domain/lottorank/LottoRanks.java

@@ -0,0 +1,39 @@
+package lotto.domain.lottorank;
+
+import java.util.Arrays;
+import java.util.EnumMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+public class LottoRanks {
+
+    private final Map<LottoRank, Integer> ranks;
+
+    private LottoRanks(Map<LottoRank, Integer> ranks) {
+        this.ranks = ranks;
+    }
+
+    public static LottoRanks from(List<LottoRank> ranks) {
+        EnumMap<LottoRank, Integer> lottoRankMap = new EnumMap<>(LottoRank.class);
+        Arrays.stream(LottoRank.values()).forEach(lottoRank -> lottoRankMap.put(lottoRank, 0));
+
+        ranks.forEach(rank -> lottoRankMap.computeIfPresent(rank, (key, value) -> value + 1));
+        return new LottoRanks(lottoRankMap);
+    }
+
+    public int getProfit() {
+        return this.ranks.entrySet()
+                .stream()
+                .mapToInt(entry -> entry.getKey().getPrize() * entry.getValue())
+                .sum();
+    }
+
+    @Override
+    public String toString() {
+        return ranks.entrySet()
+                .stream()
+                .map(entry -> String.format("%s - %d개", entry.getKey().toString(), entry.getValue()))
+                .collect(Collectors.joining("\n"));
+    }
+}

src/main/java/lotto/view/InputView.java

@@ -0,0 +1,35 @@
+package lotto.view;
+
+import camp.nextstep.edu.missionutils.Console;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class InputView {
+    private static final String DELIMITER = ",";
+
+    private InputView() {
+        throw new UnsupportedOperationException();
+    }
+
+    public static int requestInteger() {
+        final String input = Console.readLine();
+        return parseInt(input);
+    }
+
+    public static List<Integer> requestWinNumbers() {
+        final String input = Console.readLine();
+
+        return Arrays.stream(input.split(DELIMITER))
+                .map(InputView::parseInt)
+                .collect(Collectors.toList());
+    }
+
+    private static int parseInt(String value) {
+        try {
+            return Integer.parseInt(value);
+        } catch (NumberFormatException e) {
+            throw new IllegalArgumentException(String.format("[ERROR] 입력값 %s는 숫자가 아닙니다.", value));
+        }
+    }
+}

src/test/java/lotto/ApplicationTest.java

@@ -8,6 +8,7 @@
 import static camp.nextstep.edu.missionutils.test.Assertions.assertRandomUniqueNumbersInRangeTest;
 import static camp.nextstep.edu.missionutils.test.Assertions.assertSimpleTest;
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 class ApplicationTest extends NsTest {
     private static final String ERROR_MESSAGE = "[ERROR]";
@@ -48,10 +49,9 @@ class ApplicationTest extends NsTest {
 
     @Test
     void 예외_테스트() {
-        assertSimpleTest(() -> {
-            runException("1000j");
-            assertThat(output()).contains(ERROR_MESSAGE);
-        });
+        assertSimpleTest(() -> assertThatThrownBy(() -> runException("1000j"))
+                .isInstanceOf(IllegalArgumentException.class)
+        );
     }
 
     @Override