refactor: PurchasingPrice 객체는 티켓 가격을 모르도록 변경

- 구입가격 객체는 양의 정수만을 허용하도록 변경한다.

src/main/java/lotto/Application.java

@@ -9,7 +9,7 @@
 public class Application {
     public static void main(String[] args) {
         PurchasingPrice purchasingPrice = new PurchasingPrice(InputView.inputPurchasingPrice());
-        int lottoTicketCounts = purchasingPrice.calculatePurchasableTicketCounts();
+        int lottoTicketCounts = purchasingPrice.calculatePurchasableTicketCounts(1000);
         LottoTickets lottoTickets = LottoTickets.generateAutomatic(lottoTicketCounts, new RandomLottoNumberGenerator());
         OutputView.printPurchasedLottoTicketCounts(lottoTicketCounts);
         OutputView.printAllLottoTicketNumbers(lottoTickets);

src/main/java/lotto/domain/LottoTickets.java

@@ -8,6 +8,7 @@
 import java.util.stream.Stream;
 
 public class LottoTickets {
+    private static final int LOTTO_TICKET_PRICE = 1000;
 
     private final List<LottoTicket> lottoTickets;
 
@@ -22,6 +23,13 @@ public static LottoTickets generateAutomatic(int lottoTicketCounts, LottoNumberG
         return new LottoTickets(lottoTickets);
     }
 
+    public static LottoTickets generateAutomatic2(PurchasingPrice purchasingPrice, LottoNumberGenerator lottoNumberGenerator) {
+        List<LottoTicket> lottoTickets = Stream.generate(() -> LottoTicket.from(lottoNumberGenerator.generate()))
+                .limit(purchasingPrice.calculatePurchasableTicketCounts(LOTTO_TICKET_PRICE))
+                .collect(Collectors.toList());
+        return new LottoTickets(lottoTickets);
+    }
+
     public LottoResult checkResult(WinningLottoTicket winningLottoTicket) {
         Map<LottoRank, Long> statistics = lottoTickets.stream()
                 .map(winningLottoTicket::compareNumbers)

src/main/java/lotto/domain/PurchasingPrice.java

@@ -1,8 +1,8 @@
 package lotto.domain;
 
 public class PurchasingPrice {
-    private static final int MINIMUM_TICKET_PRICE = 1000;
-    private static final String INVALID_PRICE = "로또 티켓 최소 구매 금액은 1000원입니다.";
+    private static final int ZERO = 0;
+    private static final String INVALID_PRICE = "로또 티켓 구매 금액은 양의 정수이어야 합니다.";
 
     private final int price;
 
@@ -12,13 +12,13 @@ public PurchasingPrice(int price) {
     }
 
     private void validatePrice(int price) {
-        if (price < MINIMUM_TICKET_PRICE) {
+        if (price <= ZERO) {
             throw new IllegalArgumentException(INVALID_PRICE);
         }
     }
 
-    public int calculatePurchasableTicketCounts() {
-        return price / MINIMUM_TICKET_PRICE;
+    public int calculatePurchasableTicketCounts(int ticketCost) {
+        return price / ticketCost;
     }
 
     public int getPrice() {

src/test/java/lotto/domain/PurchasingPriceTest.java

@@ -11,14 +11,14 @@
 
 class PurchasingPriceTest {
 
-    @DisplayName("로또 구입 금액은 1000원 미만인 경우 객체 생성 예외가 발생한다")
+    @DisplayName("로또 구입 금액은 양의 정수여야 한다.")
     @ParameterizedTest
-    @ValueSource(ints = {-10, 0, 999})
+    @ValueSource(ints = {-10, 0})
     void cannotMakePurchasingPrice(int purchasingPrice) {
         assertThatCode(() -> {
             new PurchasingPrice(purchasingPrice);
         }).isInstanceOf(IllegalArgumentException.class)
-                .hasMessage("로또 티켓 최소 구매 금액은 1000원입니다.");
+                .hasMessage("로또 티켓 구매 금액은 양의 정수이어야 합니다.");
     }
 
     @DisplayName("로또 구입 금액이 1000원 이상이면 객체가 정상 생성된다")
@@ -37,7 +37,7 @@ void calculateLottoTicketCounts() {
         int price = 3987;
         PurchasingPrice purchasingPrice = new PurchasingPrice(price);
 
-        int purchasableLottoTicketCounts = purchasingPrice.calculatePurchasableTicketCounts();
+        int purchasableLottoTicketCounts = purchasingPrice.calculatePurchasableTicketCounts(1000);
 
         assertThat(purchasableLottoTicketCounts).isEqualTo(3987 / 1000);
     }