diff --git a/apps/h2db/crm b/apps/h2db/crm
new file mode 100644
index 0000000..e69de29
diff --git a/src/main/java/web/chat/backend/entity/Room.java b/src/main/java/web/chat/backend/entity/Room.java
index 3c3057a..96b04bd 100644
--- a/src/main/java/web/chat/backend/entity/Room.java
+++ b/src/main/java/web/chat/backend/entity/Room.java
@@ -16,6 +16,7 @@
 
 @NoArgsConstructor
 @AllArgsConstructor(access = AccessLevel.PRIVATE)
+@Builder
 @Getter
 @Setter
 @Entity
diff --git a/src/test/java/web/chat/backend/controller/RoomControllerIntegrationTest.java b/src/test/java/web/chat/backend/controller/RoomControllerIntegrationTest.java
index 6ea93d5..1dc72cd 100644
--- a/src/test/java/web/chat/backend/controller/RoomControllerIntegrationTest.java
+++ b/src/test/java/web/chat/backend/controller/RoomControllerIntegrationTest.java
@@ -78,8 +78,11 @@ void shouldRespond400StatusCode_ifNotFoundRoom() throws Exception {
 	void getRooms() throws Exception {
 
 		// when
+		ResultActions resultActions = mockMvc.perform(get("/api/rooms"));
 
 		// then
+		resultActions.andExpect(status().isOk())
+			.andDo(print());
 	}
 
 	@Test
diff --git a/src/test/java/web/chat/backend/controller/RoomControllerTest.java b/src/test/java/web/chat/backend/controller/RoomControllerTest.java
index d6201c8..ee22025 100644
--- a/src/test/java/web/chat/backend/controller/RoomControllerTest.java
+++ b/src/test/java/web/chat/backend/controller/RoomControllerTest.java
@@ -2,11 +2,17 @@
 
 import static org.junit.jupiter.api.Assertions.*;
 import static org.mockito.ArgumentMatchers.*;
+import static org.hamcrest.Matchers.*;
+import static org.junit.jupiter.api.Assertions.*;
 import static org.mockito.BDDMockito.*;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
 import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.*;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
 
+
+import java.util.Arrays;
+import java.util.List;
+
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
@@ -22,6 +28,7 @@
 import lombok.RequiredArgsConstructor;
 import web.chat.backend.controller.request.RoomRequest;
 import web.chat.backend.controller.response.RoomResponse;
+
 import web.chat.backend.entity.Room;
 import web.chat.backend.service.MessageService;
 import web.chat.backend.service.RoomService;
@@ -44,10 +51,33 @@ class RoomControllerTest {
 	void getRooms() throws Exception {
 
 		// given
+		Room r1 = Room.builder()
+			.id(1L)
+			.title("test1")
+			.build();
+		Room r2 = Room.builder()
+			.id(2L)
+			.title("test2")
+			.build();
+		Room r3 = Room.builder()
+			.id(3L)
+			.title("test3")
+			.build();
+		List<Room> roomList = Arrays.asList(r1, r2, r3);
+
+		given(roomService.getRooms()).willReturn(roomList);
 
 		// when
+		ResultActions resultActions = mockMvc.perform(get("/api/rooms"));
 
 		// then
+		resultActions.andExpect(status().isOk())
+			.andExpect(jsonPath("$.rooms", not(empty())))
+			.andExpect(jsonPath("$.rooms", hasSize(3)))
+			.andExpect(jsonPath("$.rooms[0].id", is(1)))
+			.andExpect(jsonPath("$.rooms[1].id", is(2)))
+			.andExpect(jsonPath("$.rooms[2].id", is(3)))
+			.andDo(print());
 	}
 
 	@Test
@@ -105,9 +135,21 @@ void createRoom_titleLengthLessThan_2() throws Exception {
 	void createRoom_titleLengthExceed_20() throws Exception {
 
 		// given
+		RoomRequest req = new RoomRequest();
+		req.setTitle("title length exceeds 20");
+
+		final String body = objectMapper.writeValueAsString(req);
 
 		// when
+		ResultActions resultActions = mockMvc.perform(
+			post("/api/rooms")
+				.contentType(MediaType.APPLICATION_JSON)
+				.content(body));
 
 		// then
+		resultActions.andExpect(status().is4xxClientError())
+			.andExpect(result -> assertTrue(result.getResolvedException() instanceof MethodArgumentNotValidException))
+			.andDo(print());
+
 	}
 }