[R9] Unit test for add method in user service class

src/test/java/com/mirna/hospitalmanagementapi/unit/application/service/UserServiceTest.java

@@ -0,0 +1,68 @@
+package com.mirna.hospitalmanagementapi.unit.application.service;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestInstance;
+import org.junit.jupiter.api.TestInstance.Lifecycle;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ActiveProfiles;
+
+import com.mirna.hospitalmanagementapi.HospitalManagementApiApplication;
+import com.mirna.hospitalmanagementapi.application.services.UserServiceImpl;
+import com.mirna.hospitalmanagementapi.domain.dtos.auth.UserDTO;
+import com.mirna.hospitalmanagementapi.domain.entities.auth.User;
+import com.mirna.hospitalmanagementapi.domain.repositories.auth.UserRepository;
+
+import jakarta.validation.ConstraintViolationException;
+
+/**
+ * 
+ * @author Mirna Gama
+ * @version 1.0
+ */
+@SpringBootTest(classes = HospitalManagementApiApplication.class)
+@TestInstance(Lifecycle.PER_CLASS)
+@ActiveProfiles("test")
+public class UserServiceTest {
+
+	@Autowired
+	private UserServiceImpl userService;
+	
+	@Autowired
+	private UserRepository userRepository;
+	
+	@AfterAll
+	public void terminate() {
+		userRepository.deleteAll();
+	}
+	
+	/**
+	 * Create a valid doctor.
+	 */
+	@Test
+	@DisplayName("Should add valid user")
+	public void testAddValidUser() {
+		UserDTO userDTO = new UserDTO("test", "password");
+		
+		User user = userService.addUser(userDTO);
+		
+		assertNotNull(user.getId());
+	}
+	
+	/**
+	 * Avoid creating a user with invalid parameter. Example: login being blank
+	 */
+	@Test
+	@DisplayName("Should not add user with invalid parameter")
+	public void testAddInvalidUser() {
+		UserDTO userDTO = new UserDTO("", "password");
+		
+		assertThrows(ConstraintViolationException.class, () ->  userService.addUser(userDTO));
+	}
+
+}