[feat] 강의 서비스 테스트를 추가하라

강의 생성, 강의 상태 변경 3가지 테스트를 추가합니다.
예외 테스트는 도메인 테스트에서 했기 때문에 정상 상황만 테스트합니다

Author: sunggyupaik

Diff for: src/main/java/nextstep/courses/service/SessionService.java

@@ -21,31 +21,31 @@ public void create(Long courseId, Session session, LocalDateTime date) {
         sessionRepository.save(courseId, session);
     }
 
-    public void applySession(NsUser loginUser, long sessionId, Payment payment, LocalDateTime date) {
+    public void applySession(NsUser loginUser, Long sessionId, Payment payment, LocalDateTime date) {
         Session session = getSession(sessionId);
         Apply apply = session.apply(loginUser, payment, date);
         sessionRepository.saveApply(apply);
     }
 
-    public void changeOnReady(long sessionId, LocalDate date) {
+    public void changeOnReady(Long sessionId, LocalDate date) {
         Session session = getSession(sessionId);
         session.changeOnReady(date);
         sessionRepository.update(sessionId, session);
     }
 
-    public void changeOnRecruit(long sessionId, LocalDate date) {
+    public void changeOnRecruit(Long sessionId, LocalDate date) {
         Session session = getSession(sessionId);
         session.changeOnRecruit(date);
         sessionRepository.update(sessionId, session);
     }
 
-    public void changeOnEnd(long sessionId, LocalDate date) {
+    public void changeOnEnd(Long sessionId, LocalDate date) {
         Session session = getSession(sessionId);
         session.changeOnEnd(date);
         sessionRepository.update(sessionId, session);
     }
 
-    private Session getSession(long sessionId) {
+    private Session getSession(Long sessionId) {
         return sessionRepository.findById(sessionId).orElseThrow(NotFoundException::new);
     }
 }

Diff for: src/test/java/nextstep/courses/domain/course/service/SessionServiceTest.java

@@ -5,6 +5,7 @@
 import nextstep.courses.domain.course.session.*;
 import nextstep.courses.service.SessionService;
 import nextstep.payments.domain.Payment;
+import nextstep.qna.NotFoundException;
 import nextstep.users.domain.NsUser;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
@@ -25,6 +26,10 @@
 public class SessionServiceTest {
     private static final NsUser JAVAJIGI = new NsUser(1L, "javajigi", "password", "name", "[email protected]");
     private static final NsUser APPLE = new NsUser(3L, "apple", "password", "name", "[email protected]");
+    private static final LocalDate DATE_2023_12_5 = LocalDate.of(2023, 12, 5);
+    private static final LocalDate DATE_2023_12_6 = LocalDate.of(2023, 12, 6);
+    private static final LocalDate DATE_2023_12_10 = LocalDate.of(2023, 12, 10);
+    private static final LocalDate DATE_2023_12_12 = LocalDate.of(2023, 12, 12);
 
     private Image image;
     private Payment payment;
@@ -33,7 +38,9 @@ public class SessionServiceTest {
     private Applicants applicants;
     private Duration duration;
     private SessionState sessionState;
+    private SessionStatus sessionStatus;
     private Session session;
+    private Session savedSession;
 
     @Mock
     private SessionRepository sessionRepository;
@@ -49,10 +56,27 @@ public void setUp() {
         localDate = LocalDate.of(2023, 12, 5);
         duration = new Duration(localDate, localDate);
         sessionState = new SessionState(SessionType.FREE, 0L, Integer.MAX_VALUE);
+        sessionStatus = SessionStatus.RECRUIT;
         applicants = new Applicants();
         applicants.addApplicant(JAVAJIGI, sessionState);
         session = new Session(1L, image, duration, sessionState, applicants,
-                SessionStatus.RECRUIT, 1L, localDateTime, localDateTime);
+                sessionStatus, 1L, localDateTime, localDateTime);
+    }
+
+    @Test
+    @DisplayName("주어진 강의 정보로 강의를 생성한다.")
+    void create_success() {
+        Session newSession = new Session(image, duration, sessionState, 1L, localDateTime);
+        Session savedSession = new Session(1L, image, duration, sessionState, new Applicants(),
+                SessionStatus.READY, 1L, localDateTime, localDateTime);
+        when(sessionRepository.findById(1L)).thenReturn(Optional.of(savedSession));
+
+        sessionService.create(1L, newSession, localDateTime);
+        Session findSession = sessionRepository.findById(1L).orElseThrow(NotFoundException::new);
+
+        assertThat(findSession.getId()).isEqualTo(1L);
+        assertThat(findSession.getSessionStatus()).isEqualTo(SessionStatus.READY);
+        assertThat(findSession.getApplicants()).hasSize(0);
     }
 
     @Test
@@ -64,5 +88,48 @@ void apply_success() {
         sessionService.applySession(APPLE, session.getId(), payment, localDateTime);
 
         assertThat(session.applyCount()).isEqualTo(2);
+        assertThat(session.getApplicants()).contains(APPLE);
+    }
+
+    @Test
+    @DisplayName("강의 시작 날짜 전이라면 주어진 식별자에 해당하는 강의를 준비 상태로 변경한다.")
+    void changeOnReady_success() {
+        duration = new Duration(DATE_2023_12_6, DATE_2023_12_12);
+        savedSession = new Session(1L, image, duration, sessionState, new Applicants(),
+                SessionStatus.RECRUIT, 1L, localDateTime, localDateTime);
+        when(sessionRepository.findById(1L)).thenReturn(Optional.of(savedSession));
+
+        sessionService.changeOnReady(1L, DATE_2023_12_5);
+
+        assertThat(savedSession.getId()).isEqualTo(1L);
+        assertThat(savedSession.getSessionStatus()).isEqualTo(SessionStatus.READY);
+    }
+
+    @Test
+    @DisplayName("강의 시작 날짜 전이라면 주어진 식별자에 해당하는 강의를 모집중 상태로 변경한다.")
+    void changeOnRecruit_success() {
+        duration = new Duration(DATE_2023_12_6, DATE_2023_12_12);
+        savedSession = new Session(1L, image, duration, sessionState, new Applicants(),
+                SessionStatus.READY, 1L, localDateTime, localDateTime);
+        when(sessionRepository.findById(1L)).thenReturn(Optional.of(savedSession));
+
+        sessionService.changeOnRecruit(1L, DATE_2023_12_5);
+
+        assertThat(savedSession.getId()).isEqualTo(1L);
+        assertThat(savedSession.getSessionStatus()).isEqualTo(SessionStatus.RECRUIT);
+    }
+
+    @Test
+    @DisplayName("강의 종료날짜 이후라면 주어진 식별자에 해당하는 강의를 종료 상태로 변경한다.")
+    void changeOnEnd_success() {
+        duration = new Duration(DATE_2023_12_5, DATE_2023_12_10);
+        savedSession = new Session(1L, image, duration, sessionState, new Applicants(),
+                SessionStatus.READY, 1L, localDateTime, localDateTime);
+        when(sessionRepository.findById(1L)).thenReturn(Optional.of(savedSession));
+
+        sessionService.changeOnEnd(1L, DATE_2023_12_12);
+
+        assertThat(savedSession.getId()).isEqualTo(1L);
+        assertThat(savedSession.getSessionStatus()).isEqualTo(SessionStatus.END);
     }
 }