대출 객체에서 대출 기간 객체를 분리(Period) 및 단위 테스트 작성

Author: shine-17

build.gradle

@@ -23,6 +23,7 @@ dependencies {
 	developmentOnly 'org.springframework.boot:spring-boot-devtools'
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
 
 	// https://mvnrepository.com/artifact/com.google.code.gson/gson
 	implementation group: 'com.google.code.gson', name: 'gson', version: '2.10.1'
@@ -34,22 +35,13 @@ dependencies {
 
 	// mapstruct
 	// https://mvnrepository.com/artifact/org.mapstruct/mapstruct-processor
-//	annotationProcessor("org.mapstruct:mapstruct-processor:1.5.3.Final")
-//	// https://mvnrepository.com/artifact/org.mapstruct/mapstruct-processor
-//	testAnnotationProcessor("org.mapstruct:mapstruct-processor:1.5.3.Final")
-//	// https://mvnrepository.com/artifact/org.mapstruct/mapstruct
-//	implementation("org.mapstruct:mapstruct:1.5.3.Final")
-//	// https://mvnrepository.com/artifact/org.projectlombok/lombok-mapstruct-binding
-//	implementation("org.projectlombok:lombok-mapstruct-binding:0.2.0")
-
-//	implementation 'org.mapstruct:mapstruct:1.5.5.Final'
-//	annotationProcessor 'org.mapstruct:mapstruct-processor:1.5.5.Final'
-//	implementation 'org.mapstruct:mapstruct-jdk8:1.5.5.Final'
-//	implementation 'org.mapstruct:mapstruct-spring-extensions:1.5.5.Final'
-
-
-	implementation 'org.mapstruct:mapstruct:1.5.5.Final'
-	annotationProcessor 'org.mapstruct:mapstruct-processor:1.5.5.Final'
+	annotationProcessor("org.mapstruct:mapstruct-processor:1.5.3.Final")
+	// https://mvnrepository.com/artifact/org.mapstruct/mapstruct-processor
+	testAnnotationProcessor("org.mapstruct:mapstruct-processor:1.5.3.Final")
+	// https://mvnrepository.com/artifact/org.mapstruct/mapstruct
+	implementation("org.mapstruct:mapstruct:1.5.3.Final")
+	// https://mvnrepository.com/artifact/org.projectlombok/lombok-mapstruct-binding
+	implementation("org.projectlombok:lombok-mapstruct-binding:0.2.0")
 
 
 

src/main/java/com/study/bookcafe/domain/Borrow.java

@@ -1,10 +1,9 @@
 package com.study.bookcafe.domain;
 
-import lombok.AllArgsConstructor;
-import lombok.Builder;
-import lombok.Getter;
-import lombok.NoArgsConstructor;
-import java.sql.Timestamp;
+import com.study.bookcafe.vo.Period;
+import lombok.*;
+
+import java.time.LocalDateTime;
 
 @Builder
 @Getter
@@ -14,12 +13,15 @@ public class Borrow {
     private long id;                        // 대출 ID
     private Member member;                  // 회원
     private Book book;                      // 도서
-    private Timestamp borrowDate;           // 대출 날짜
-    private Timestamp returnDate;           // 반납 날짜
+//    private Timestamp borrowDate;           // 대출 날짜
+//    private Timestamp returnDate;           // 반납 날짜
+
+    private Period period;                  // 대출 기간
 
-    public Borrow(Member member, Book book) {
+    public Borrow(Member member, Book book, LocalDateTime from) {
         this.member = member;
         this.book = book;
+        this.period = new Period(from);
     }
 
     /**

src/main/java/com/study/bookcafe/vo/Period.java

@@ -0,0 +1,42 @@
+package com.study.bookcafe.vo;
+
+import lombok.NonNull;
+import java.time.LocalDateTime;
+import java.util.Objects;
+
+public class Period {
+    /*
+        - 대출 일자가 반납 일자보다 더 이전인 것을 보장할 책임
+        - 대출 기간(대출 일자 ~ 반납 일자)을 생성할 책임
+        - 연장 여부에 따라 반납 일자가 변경
+            - 기본: 1주, 연장 시: 1주 추가, 총 2주
+     */
+
+    private final LocalDateTime from;           // 대출 일자
+    private final LocalDateTime to;             // 반납 일자
+
+    public Period(@NonNull LocalDateTime from) {
+        this.from = from;
+        this.to = this.from.plusWeeks(1);
+    }
+
+    public Period(@NonNull LocalDateTime from, @NonNull LocalDateTime to) {
+        if(from.isAfter(to)) throw new IllegalArgumentException("반납 일자는 대출 일자보다 이후여야 합니다.");
+
+        this.from = from;
+        this.to = to;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Period period = (Period) o;
+        return Objects.equals(from, period.from) && Objects.equals(to, period.to);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(from, to);
+    }
+}

src/test/java/com/study/bookcafe/borrow/PeriodTest.java

@@ -0,0 +1,32 @@
+package com.study.bookcafe.borrow;
+
+import com.study.bookcafe.vo.Period;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import java.time.LocalDateTime;
+
+import static org.assertj.core.api.Assertions.*;
+
+public class PeriodTest {
+
+    LocalDateTime date1 = LocalDateTime.of(2024, 12, 7, 12, 0, 0);
+    LocalDateTime date2 = LocalDateTime.of(2024, 12, 8, 12, 0, 0);
+
+    @Test
+    @DisplayName("반납일자는 대출일자보다 이후여야 한다.")
+    public void createPeriodTest() {
+        Period period1 = new Period(date1, date2);
+        Period period2 = new Period(date2, date2);
+
+        assertThat(period1).isNotNull();
+        assertThat(period2).isNotNull();
+    }
+
+    @Test
+    @DisplayName("반납일자가 대출일자보다 이전이거나 반납일자 또는 대출일자가 null이면 예외가 발생한다.")
+    public void createPeriodExceptionTest() {
+        Assertions.assertThrows(IllegalArgumentException.class, () -> new Period(date2, date1));
+        Assertions.assertThrows(NullPointerException.class, () -> new Period(null, null));
+    }
+}