feat: 2단계 - 수강신청 강의 테스트코드 및 도메인 구현

README.md

@@ -65,7 +65,7 @@ Answer
   - List<Session>
 
 
-- [ ] Session
+- [x] Session
   - 시작일, 종료일
   - 커버 이미지 정보
   - 강의 유형(무료/유료)
@@ -77,10 +77,10 @@ Answer
   - width >= 300, height >= 200 / width * 2 = height * 3
 
 
-- [ ] 무료 강의
+- [x] 무료 강의
   - 최대 수강 인원 제한 없음
 
-- [ ] 유료 강의
+- [x] 유료 강의
   - 강의 최대 수강인원 
     - 강의 최대 수강인원 초과 불가
   - 수강료

src/main/java/nextstep/courses/domain/FreeSession.java

@@ -0,0 +1,8 @@
+package nextstep.courses.domain;
+
+public class FreeSession implements SessionStrategy {
+    @Override
+    public boolean canEnroll() {
+        return true;
+    }
+}

src/main/java/nextstep/courses/domain/PaidSession.java

@@ -0,0 +1,29 @@
+package nextstep.courses.domain;
+
+public class PaidSession implements SessionStrategy {
+
+    private int maxEnrollmentCount;
+    private int currentEnrollmentCount;
+    private int tuitionFee;
+
+    private int paymentAmount; //todo
+
+    public PaidSession(int maxEnrollmentCount, int currentEnrollmentCount, int tuitionFee, int paymentAmount){
+        this.maxEnrollmentCount = maxEnrollmentCount;
+        this.currentEnrollmentCount = currentEnrollmentCount;
+        this.tuitionFee = tuitionFee;
+        this.paymentAmount = paymentAmount;
+    }
+
+    private boolean isFull() {
+        return maxEnrollmentCount <= currentEnrollmentCount;
+    }
+    private boolean isTuitionPaid() {
+        return tuitionFee == paymentAmount;
+    }
+
+    @Override
+    public boolean canEnroll() {
+        return !isFull() && isTuitionPaid(); //todo
+    }
+}

src/main/java/nextstep/courses/domain/Session.java

@@ -1,20 +1,36 @@
 package nextstep.courses.domain;
 
+import java.time.LocalDate;
+
 public class Session {
 
-    public boolean isValidCoverImage() {
-        return false;
+    private LocalDate startDate;
+    private LocalDate endDate;
+    private SessionCoverImage sessionCoverImage;
+    private SessionStatus sessionStatus;
+    private SessionStrategy sessionTypeStrategy;
+
+    public Session(SessionCoverImage sessionCoverImage, SessionStatus sessionStatus, SessionStrategy sessionTypeStrategy) {
+        this(null, null, sessionCoverImage, sessionStatus, sessionTypeStrategy);
     }
-    public boolean canEnroll() {
-        return false;
+
+    public Session(LocalDate startDate, LocalDate endDate, SessionCoverImage sessionCoverImage, SessionStatus sessionStatus, SessionStrategy sessionTypeStrategy) {
+        this.startDate = startDate;
+        this.endDate = endDate;
+        this.sessionCoverImage = sessionCoverImage;
+        this.sessionStatus = sessionStatus;
+        this.sessionTypeStrategy = sessionTypeStrategy;
     }
-    private boolean isFull() {
-        return false;
+
+    public boolean isValidCoverImage() {
+        return sessionCoverImage.isValidCoverImage();
     }
-    private boolean isTuitionPaid() {
-        return false;
+
+    public boolean canEnroll() {
+        return sessionTypeStrategy.canEnroll() && isRecruiting();
     }
+
     private boolean isRecruiting() {
-        return false;
+        return sessionStatus.isRecruiting();
     }
 }

src/main/java/nextstep/courses/domain/SessionStrategy.java

@@ -0,0 +1,6 @@
+package nextstep.courses.domain;
+
+@FunctionalInterface
+public interface SessionStrategy {
+    boolean canEnroll();
+}

src/test/java/nextstep/courses/infrastructure/SessionTest.java

@@ -1,43 +1,45 @@
 package nextstep.courses.infrastructure;
 
-import nextstep.courses.domain.Session;
-import org.junit.jupiter.api.BeforeEach;
+import nextstep.courses.domain.*;
 import org.junit.jupiter.api.Test;
 
+import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class SessionTest {
 
     private Session session;
 
-    @BeforeEach
-    void setUp() {
-        session = new Session();
-    }
-
     @Test
     void 커버_이미지_확인() {
+        session = new Session(new SessionCoverImage("gif", 300, 200), SessionStatus.RECRUITING, () -> true);
         assertTrue(session.isValidCoverImage());
     }
 
     @Test
     void 수강신청_가능여부_확인__인원초과_확인() {
-//        session.setEnrollmentCount(0);
-//        assertTrue(session.isFull());
+        session = new Session(new SessionCoverImage("gif", 300, 200), SessionStatus.RECRUITING, new PaidSession(3, 2, 20000, 20000));
         assertTrue(session.canEnroll());
+        session = new Session(new SessionCoverImage("gif", 300, 200), SessionStatus.RECRUITING, new PaidSession(2, 2, 20000, 20000));
+        assertFalse(session.canEnroll());
     }
 
     @Test
     void 수강신청_가능여부_확인__강의_수강료_확인() {
-//        session.setTuitionFee(20000);
-//        assertTrue(session.isTuitionPaid(20000)); //수강생이 결제한 금액
+        session = new Session(new SessionCoverImage("gif", 300, 200), SessionStatus.RECRUITING, new PaidSession(3, 2, 20000, 20000));
         assertTrue(session.canEnroll());
+        session = new Session(new SessionCoverImage("gif", 300, 200), SessionStatus.RECRUITING, new PaidSession(3, 2, 20000, 15000));
+        assertFalse(session.canEnroll());
     }
 
     @Test
     void 수강신청_가능여부_확인__강의_상태_모집중() {
-//        assertTrue(session.isRecruiting());
+        session = new Session(new SessionCoverImage("gif", 300, 200), SessionStatus.RECRUITING, () -> true);
         assertTrue(session.canEnroll());
+        session = new Session(new SessionCoverImage("gif", 300, 200), SessionStatus.CLOSED, new FreeSession());
+        assertFalse(session.canEnroll());
+        session = new Session(new SessionCoverImage("gif", 300, 200), SessionStatus.CLOSED, new PaidSession(3, 2, 20000, 20000));
+        assertFalse(session.canEnroll());
     }
 
 }