优化目录结构

backend/src/test/java/com/openisle/service/ReactionServiceTest.java

@@ -0,0 +1,44 @@
+package com.openisle.service;
+
+import com.openisle.model.*;
+import com.openisle.repository.*;
+import org.junit.jupiter.api.Test;
+
+import java.util.Optional;
+
+import static org.mockito.Mockito.*;
+
+class ReactionServiceTest {
+    @Test
+    void reactToPostSendsEmailEveryFive() {
+        ReactionRepository reactionRepo = mock(ReactionRepository.class);
+        UserRepository userRepo = mock(UserRepository.class);
+        PostRepository postRepo = mock(PostRepository.class);
+        CommentRepository commentRepo = mock(CommentRepository.class);
+        NotificationService notif = mock(NotificationService.class);
+        EmailSender email = mock(EmailSender.class);
+        ReactionService service = new ReactionService(reactionRepo, userRepo, postRepo, commentRepo, notif, email);
+        org.springframework.test.util.ReflectionTestUtils.setField(service, "websiteUrl", "https://ex.com");
+
+        User user = new User();
+        user.setId(1L);
+        user.setUsername("bob");
+        User author = new User();
+        author.setId(2L);
+        author.setEmail("a@a.com");
+        Post post = new Post();
+        post.setId(3L);
+        post.setAuthor(author);
+
+        when(userRepo.findByUsername("bob")).thenReturn(Optional.of(user));
+        when(postRepo.findById(3L)).thenReturn(Optional.of(post));
+        when(reactionRepo.findByUserAndPostAndType(user, post, ReactionType.LIKE)).thenReturn(Optional.empty());
+        when(reactionRepo.save(any(Reaction.class))).thenAnswer(i -> i.getArgument(0));
+        when(reactionRepo.countReceived(author.getUsername())).thenReturn(5L);
+
+        service.reactToPost("bob", 3L, ReactionType.LIKE);
+
+        verify(email).sendEmail("a@a.com", "你有新的互动", "https://ex.com/messages");
+        verify(notif).sendCustomPush(author, "你有新的互动", "https://ex.com/messages");
+    }
+}