Add controller unit tests and test dependencies

src/test/java/com/openisle/controller/CommentControllerTest.java

@@ -0,0 +1,77 @@
+package com.openisle.controller;
+
+import com.openisle.model.Comment;
+import com.openisle.model.Post;
+import com.openisle.model.User;
+import com.openisle.service.CommentService;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
+import org.springframework.test.web.servlet.MockMvc;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+import static org.mockito.ArgumentMatchers.eq;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@WebMvcTest(CommentController.class)
+@AutoConfigureMockMvc(addFilters = false)
+class CommentControllerTest {
+    @Autowired
+    private MockMvc mockMvc;
+
+    @MockBean
+    private CommentService commentService;
+
+    private Comment createComment(Long id, String content, String authorName) {
+        User user = new User();
+        user.setUsername(authorName);
+        Comment c = new Comment();
+        c.setId(id);
+        c.setContent(content);
+        c.setCreatedAt(LocalDateTime.now());
+        c.setAuthor(user);
+        c.setPost(new Post());
+        return c;
+    }
+
+    @Test
+    void createAndListComments() throws Exception {
+        Comment comment = createComment(1L, "hi", "bob");
+        Mockito.when(commentService.addComment(eq("bob"), eq(1L), eq("hi"))).thenReturn(comment);
+        Mockito.when(commentService.getCommentsForPost(1L)).thenReturn(List.of(comment));
+        Mockito.when(commentService.getReplies(1L)).thenReturn(List.of());
+
+        mockMvc.perform(post("/api/posts/1/comments")
+                        .contentType("application/json")
+                        .content("{\"content\":\"hi\"}")
+                        .principal(new UsernamePasswordAuthenticationToken("bob", "p")))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.content").value("hi"));
+
+        mockMvc.perform(get("/api/posts/1/comments"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$[0].id").value(1));
+    }
+
+    @Test
+    void replyComment() throws Exception {
+        Comment reply = createComment(2L, "re", "alice");
+        Mockito.when(commentService.addReply(eq("alice"), eq(1L), eq("re"))).thenReturn(reply);
+
+        mockMvc.perform(post("/api/comments/1/replies")
+                        .contentType("application/json")
+                        .content("{\"content\":\"re\"}")
+                        .principal(new UsernamePasswordAuthenticationToken("alice", "p")))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.id").value(2));
+    }
+}