feat: feat(be): add health check endpoint and unit test

src/main/java/com/example/coreTest/GeneratedCode.java

@@ -0,0 +1,61 @@
+package com.example.demo.controller;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api")
+public class HealthCheckController {
+
+    @GetMapping("/health")
+    public ResponseEntity<HealthStatus> healthCheck() {
+        return ResponseEntity.ok(new HealthStatus("UP"));
+    }
+
+    public static class HealthStatus {
+        private String status;
+
+        public HealthStatus(String status) {
+            this.status = status;
+        }
+
+        public String getStatus() {
+            return status;
+        }
+
+        public void setStatus(String status) {
+            this.status = status;
+        }
+    }
+}
+
+package com.example.demo.controller;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+
+@SpringBootTest
+@AutoConfigureMockMvc
+public class HealthCheckControllerTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Test
+    public void healthCheck_ShouldReturnStatusUP() throws Exception {
+        mockMvc.perform(get("/api/health")
+                .accept(MediaType.APPLICATION_JSON))
+                .andExpect(status().isOk())
+                .andExpect(content().json("{\"status\":\"UP\"}"));
+    }
+}