Merge pull request #750 from woowacourse-teams/fix/#749

병합 충돌 해결

backend/src/test/java/mouda/backend/chamyo/service/ChamyoServiceTest.java

@@ -0,0 +1,113 @@
+package mouda.backend.chamyo.service;
+
+import static org.assertj.core.api.Assertions.*;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import mouda.backend.common.fixture.DarakbangFixture;
+import mouda.backend.common.fixture.DarakbangMemberFixture;
+import mouda.backend.common.fixture.MemberFixture;
+import mouda.backend.common.fixture.MoimFixture;
+import mouda.backend.darakbang.domain.Darakbang;
+import mouda.backend.darakbang.infrastructure.DarakbangRepository;
+import mouda.backend.darakbangmember.domain.DarakbangMember;
+import mouda.backend.darakbangmember.infrastructure.DarakbangMemberRepository;
+import mouda.backend.member.domain.Member;
+import mouda.backend.member.infrastructure.MemberRepository;
+import mouda.backend.moim.business.ChamyoService;
+import mouda.backend.moim.domain.Moim;
+import mouda.backend.moim.exception.ChamyoException;
+import mouda.backend.moim.infrastructure.MoimRepository;
+
+@SpringBootTest
+class ChamyoServiceTest {
+
+	@Autowired
+	private ChamyoService chamyoService;
+
+	@Autowired
+	private DarakbangRepository darakbangRepository;
+
+	@Autowired
+	private DarakbangMemberRepository darakbangMemberRepository;
+
+	@Autowired
+	private MemberRepository memberRepository;
+
+	@Autowired
+	private MoimRepository moimRepository;
+
+	@DisplayName("같은 회원이 따로 따로 여러 번 참여 요청을 하면 두 번째 요청 시 참여에 실패한다.")
+	@Test
+	void chamyoMoim() throws InterruptedException {
+		Darakbang darakbang = DarakbangFixture.getDarakbangWithMouda();
+		darakbangRepository.save(darakbang);
+
+		Member member = MemberFixture.getAnna();
+		memberRepository.save(member);
+
+		DarakbangMember darakbangMember = DarakbangMemberFixture
+			.getDarakbangMemberWithWooteco(darakbang, member);
+		darakbangMemberRepository.save(darakbangMember);
+
+		Moim moim = MoimFixture.getBasketballMoim(darakbang.getId());
+		moimRepository.save(moim);
+
+		chamyoService.chamyoMoim(darakbang.getId(), moim.getId(), darakbangMember);
+		assertThatThrownBy(() -> chamyoService.chamyoMoim(darakbang.getId(), moim.getId(), darakbangMember))
+			.isInstanceOf(ChamyoException.class);
+		assertThat(chamyoService.findAllChamyo(darakbang.getId(), moim.getId()).chamyos()).hasSize(1);
+	}
+
+	@DisplayName("동시 참여 테스트")
+	@Nested
+	class ConcurrencyTest {
+
+		@DisplayName("같은 회원이 동시에 여러 번 참여 요청을 하면 동시 참여가 불가능하다.")
+		@Test
+		void chamyoMoimConcurrently() throws InterruptedException {
+			int threadCount = 2;
+			ExecutorService executorService = Executors.newFixedThreadPool(threadCount);
+			CountDownLatch latch = new CountDownLatch(threadCount);
+
+			Darakbang darakbang = DarakbangFixture.getDarakbangWithMouda();
+			darakbangRepository.save(darakbang);
+
+			Moim moim = MoimFixture.getBasketballMoim(darakbang.getId());
+			moimRepository.save(moim);
+
+			Member member = MemberFixture.getAnna();
+			memberRepository.save(member);
+
+			DarakbangMember darakbangMember = DarakbangMemberFixture
+				.getDarakbangMemberWithWooteco(darakbang, member);
+			darakbangMemberRepository.save(darakbangMember);
+
+			long startTime = System.currentTimeMillis();
+			for (int i = 0; i < threadCount; i++) {
+				executorService.execute(() -> {
+					try {
+						chamyoService.chamyoMoim(darakbang.getId(), moim.getId(), darakbangMember);
+					} finally {
+						latch.countDown();
+					}
+				});
+			}
+			latch.await();
+			executorService.shutdown();
+
+			long endTime = System.currentTimeMillis();
+			System.out.printf("Test time : %d ms\n", endTime - startTime);
+
+			assertThat(chamyoService.findAllChamyo(darakbang.getId(), moim.getId()).chamyos()).hasSize(1);
+		}
+	}
+}