refactor(OutputView): LottoApplication에서 로또 출력하는 기능을 분리함

- Lotto의 number정보를 주는 getter를 만들지 않고 dto를 만들어 줌
  - 다른 객체에서 numbers를 사용하지 않도록 하기 위해 dto를 구현함
- OutputView를 만들어 1차적으로 Lotto 출력하는 부분을 비즈니스 로직에서 분리함
- Lotto, LottoShop에서 UI와 관련된 메서드를 삭제함

src/main/java/lotto/LottoApplication.java

@@ -2,17 +2,20 @@
 
 import device.input.Input;
 import device.output.Output;
+import lotto.lotto.dto.LottoListDto;
 import lotto.lotto.Lotto;
 import lotto.lotto.LottoShop;
 import lotto.reward.RewardCoordinator;
 import lotto.setting.LottoApplicationSetting;
 import lotto.view.InputView;
+import lotto.view.OutputView;
 import lotto.winningnumber.WinningNumber;
 import java.util.List;
 
 public class LottoApplication {
 
     private final InputView inputView;
+    private final OutputView outputView;
     private final Output output;
     private final LottoApplicationSetting setting;
 
@@ -21,6 +24,7 @@ public class LottoApplication {
 
     LottoApplication(Input input, Output output, LottoApplicationSetting setting) {
         this.inputView = new InputView(input, output);
+        this.outputView = new OutputView(output);
         this.output = output;
         this.setting = setting;
     }
@@ -40,12 +44,10 @@ private void runApplication() {
 
     private void buyLotto() {
         purchasePrice = inputView.readPurchasePrice();
-
         LottoShop lottoShop = setting.createLottoShop();
-        lottos = lottoShop.buyLotto(purchasePrice);
 
-        String lottosInfo = lottoShop.getLottoInfo(lottos);
-        output.print(lottosInfo);
+        lottos = lottoShop.buyLotto(purchasePrice);
+        outputView.printLottos(new LottoListDto(lottos));
     }
 
     private void showRewardResult() {

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

@@ -1,9 +1,8 @@
 package lotto.lotto;
 
-import lotto.message.ExceptionMessage;
+import lotto.lotto.dto.LottoDto;
 import lotto.setting.LottoSetting;
 import java.util.List;
-import java.util.stream.Collectors;
 
 public class Lotto {
     private final List<Integer> numbers;
@@ -17,10 +16,8 @@ public Lotto(List<Integer> numbers, LottoSetting setting) {
         this.numbers = numbers;
     }
 
-    public String getNumbers() {
-        return numbers.stream().sorted()
-                .map(number -> String.valueOf(number))
-                .collect(Collectors.joining(", ","[","]"));
+    public LottoDto getLottoDto() {
+        return new LottoDto(List.copyOf(numbers));
     }
 
     public boolean isInNumbers(int number) {

src/main/java/lotto/lotto/LottoShop.java

@@ -35,13 +35,4 @@ private List<Lotto> createAutoLotto(int countOfLotto) {
         }
         return lottos;
     }
-
-    public String getLottoInfo(List<Lotto> lottos) {
-        String lottosInfo = lottos.stream()
-                .map(lotto -> lotto.getNumbers())
-                .collect(Collectors.joining("\n"));
-
-        return "\n" + lottos.size() + "개를 구매했습니다."
-                + lottosInfo;
-    }
 }

src/main/java/lotto/lotto/dto/LottoDto.java

@@ -0,0 +1,16 @@
+package lotto.lotto.dto;
+
+import java.util.List;
+
+public class LottoDto {
+
+    private List<Integer> numbers;
+
+    public LottoDto(List<Integer> numbers) {
+        this.numbers = numbers;
+    }
+
+    public List<Integer> getNumbers() {
+        return numbers;
+    }
+}

src/main/java/lotto/lotto/dto/LottoListDto.java

@@ -0,0 +1,20 @@
+package lotto.lotto.dto;
+
+import lotto.lotto.Lotto;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class LottoListDto {
+
+    private List<LottoDto> lottoDtos;
+
+    public LottoListDto(List<Lotto> lottos) {
+        this.lottoDtos = lottos.stream()
+                .map(lotto -> lotto.getLottoDto())
+                .collect(Collectors.toList());
+    }
+
+    public List<LottoDto> getLottoDtos() {
+        return lottoDtos;
+    }
+}

src/main/java/lotto/view/OutputView.java

@@ -0,0 +1,32 @@
+package lotto.view;
+
+import device.output.Output;
+import lotto.lotto.dto.LottoDto;
+import lotto.lotto.dto.LottoListDto;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class OutputView {
+
+    private final Output output;
+
+    public OutputView(Output output) {
+        this.output = output;
+    }
+
+    public void printLottos(LottoListDto lottoListDto) {
+        List<LottoDto> lottoDtos = lottoListDto.getLottoDtos();
+
+        output.print("\n" + lottoDtos.size() + "개를 구매했습니다.");
+        for (LottoDto lottoDto : lottoDtos) {
+            output.print(getNumbers(lottoDto));
+        }
+    }
+
+    private String getNumbers(LottoDto lottoDto) {
+        return lottoDto.getNumbers().stream()
+                .sorted()
+                .map(number -> String.valueOf(number))
+                .collect(Collectors.joining(", ","[","]"));
+    }
+}

src/test/java/lotto/lotto/LottoShopTest.java

@@ -38,17 +38,4 @@ void buyLottoTest_IsListSizeMatched() {
 
         assertThat(result.size() == 5).isEqualTo(true);
     }
-
-    @Test
-    void getLottoInfoTest() {
-        Lotto lotto = mock(Lotto.class);
-        when(lotto.getNumbers()).thenReturn("[1, 2, 3, 4, 5, 6]");
-        List<Lotto> lottos = List.of(lotto, lotto);
-        LottoSetting lottoSetting = mock(LottoSetting.class);
-        String expect = "\n2개를 구매했습니다.\n" +
-                "[1, 2, 3, 4, 5, 6]" +
-                "[1, 2, 3, 4, 5, 6]";
-
-        String result = new LottoShop(1000, lottoSetting).getLottoInfo(lottos);
-    }
 }

src/test/java/lotto/lotto/LottoUnitTest.java

@@ -36,17 +36,6 @@ void notThrowExceptionTest_whenFormMatched() {
         }).doesNotThrowAnyException();
     }
 
-    @Test
-    void getNumbersTest() {
-        LottoSetting lottoSetting = mock(LottoSetting.class);
-        Lotto lotto = new Lotto(List.of(6,5,4,3,2,1), lottoSetting);
-        String excepted = "[1, 2, 3, 4, 5, 6]";
-
-        String result = lotto.getNumbers();
-
-        assertThat(result).isEqualTo(excepted);
-    }
-
     @Test
     void isInNumberTest_expectedTrue() {
         LottoSetting lottoSetting = mock(LottoSetting.class);