[FEATURE] 운송장 번호 및 발송일 조회

http/shipping.http

@@ -0,0 +1,2 @@
+### 대여 Id로 운송장 번호와 발송일 조회
+GET http://localhost:8080/api/v1/shipping/1

src/main/java/ok/cherry/global/swagger/shipping/ShippingControllerDoc.java

@@ -0,0 +1,28 @@
+package ok.cherry.global.swagger.shipping;
+
+import org.springframework.http.ProblemDetail;
+import org.springframework.http.ResponseEntity;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.Parameter;
+import io.swagger.v3.oas.annotations.media.Content;
+import io.swagger.v3.oas.annotations.media.Schema;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.responses.ApiResponses;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import ok.cherry.shipping.application.response.TrackingNumberResponse;
+
+@Tag(name = "Shipping")
+public interface ShippingControllerDoc {
+
+	@Operation(method = "GET", summary = "운송장 번호 및 발송일 조회", description = "대여 Id로 배송 정보의 운송장 번호와 발송일을 조회합니다")
+	@ApiResponses(value = {
+		@ApiResponse(responseCode = "200", description = "운송장 번호 및 발송일 조회 성공",
+			content = @Content(mediaType = "application/json", schema = @Schema(implementation = TrackingNumberResponse.class))),
+		@ApiResponse(responseCode = "404", description = "운송장 번호 및 발송일 조회 실패 - 배송 정보를 찾을 수 없음",
+			content = @Content(mediaType = "application/json", schema = @Schema(implementation = ProblemDetail.class)))
+	})
+	ResponseEntity<TrackingNumberResponse> getTrackingNumber(
+		@Parameter(description = "조회할 대여 Id") Long rentalId
+	);
+}

src/main/java/ok/cherry/shipping/application/ShippingService.java

@@ -9,6 +9,7 @@
 import ok.cherry.member.domain.Member;
 import ok.cherry.rental.domain.Rental;
 import ok.cherry.shipping.application.command.CreateShippingCommand;
+import ok.cherry.shipping.application.response.TrackingNumberResponse;
 import ok.cherry.shipping.domain.Shipping;
 import ok.cherry.shipping.domain.status.ShippingStatus;
 import ok.cherry.shipping.domain.type.Direction;
@@ -44,6 +45,12 @@ public Shipping createShipping(
 		return shippingRepository.save(shipping);
 	}
 
+	public TrackingNumberResponse getTrackingNumber(Long rentalId) {
+		Shipping shipping = shippingRepository.findByRentalIdAndDirection(rentalId, Direction.OUTBOUND)
+			.orElseThrow(() -> new BusinessException(ShippingError.SHIPPING_NOT_FOUND));
+		return TrackingNumberResponse.of(shipping.getTrackingNumber(), shipping.getDetail().getStartAt());
+	}
+
 	@Transactional
 	public void startShipping(Long shippingId) {
 		Shipping shipping = shippingRepository.findById(shippingId)

src/main/java/ok/cherry/shipping/application/response/TrackingNumberResponse.java

@@ -0,0 +1,20 @@
+package ok.cherry.shipping.application.response;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+
+@Schema(description = "운송장 번호 및 발송일 조회 응답 DTO")
+public record TrackingNumberResponse(
+
+	@Schema(description = "운송장 번호", example = "25090213363012345678")
+	String trackingNumber,
+
+	@Schema(description = "발송일자", example = "2025-09-02")
+	LocalDate startAt
+) {
+	public static TrackingNumberResponse of(String trackingNumber, LocalDateTime startAt) {
+		return new TrackingNumberResponse(trackingNumber, startAt.toLocalDate());
+	}
+}

src/main/java/ok/cherry/shipping/presentation/ShippingController.java

@@ -1,15 +1,26 @@
 package ok.cherry.shipping.presentation;
 
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
 import lombok.RequiredArgsConstructor;
+import ok.cherry.global.swagger.shipping.ShippingControllerDoc;
 import ok.cherry.shipping.application.ShippingService;
+import ok.cherry.shipping.application.response.TrackingNumberResponse;
 
 @RestController
 @RequestMapping("/api/v1/shipping")
 @RequiredArgsConstructor
-public class ShippingController {
+public class ShippingController implements ShippingControllerDoc {
 
 	private final ShippingService shippingService;
+
+	@GetMapping("/{rentalId}")
+	public ResponseEntity<TrackingNumberResponse> getTrackingNumber(@PathVariable Long rentalId) {
+		TrackingNumberResponse response = shippingService.getTrackingNumber(rentalId);
+		return ResponseEntity.ok(response);
+	}
 }

src/test/java/ok/cherry/shipping/application/ShippingServiceTest.java

@@ -9,6 +9,7 @@
 import org.springframework.transaction.annotation.Transactional;
 
 import jakarta.persistence.EntityManager;
+import ok.cherry.global.exception.error.BusinessException;
 import ok.cherry.global.exception.error.DomainException;
 import ok.cherry.member.MemberBuilder;
 import ok.cherry.member.domain.Member;
@@ -22,6 +23,7 @@
 import ok.cherry.rental.infrastructure.RentalRepository;
 import ok.cherry.shipping.ShippingBuilder;
 import ok.cherry.shipping.application.command.CreateShippingCommand;
+import ok.cherry.shipping.application.response.TrackingNumberResponse;
 import ok.cherry.shipping.domain.Address;
 import ok.cherry.shipping.domain.Shipping;
 import ok.cherry.shipping.domain.status.ShippingStatus;
@@ -353,6 +355,47 @@ void completeShipping_notInDelivery() {
 			.hasMessage(ShippingError.NOT_IN_DELIVERY.getMessage());
 	}
 
+	@Test
+	@DisplayName("대여 Id로 운송장 번호와 발송일 조회에 성공한다")
+	void getTrackingNumber_success() {
+		// given
+		Member member = memberRepository.save(MemberBuilder.create());
+		Product product = productRepository.save(ProductBuilder.create());
+		Rental rental = rentalRepository.save(
+			RentalBuilder.builder()
+				.withMember(member)
+				.withProduct(product)
+				.build()
+		);
+		Shipping shipping = shippingRepository.save(
+			ShippingBuilder.builder()
+				.withRental(rental)
+				.withDirection(Direction.OUTBOUND)
+				.build()
+		);
+		shipping.startShipping();
+
+		// when
+		TrackingNumberResponse response = shippingService.getTrackingNumber(rental.getId());
+
+		// then
+		Shipping savedShipping = shippingRepository.findById(shipping.getId()).orElseThrow();
+		assertThat(response.trackingNumber()).isEqualTo(savedShipping.getTrackingNumber());
+		assertThat(response.startAt()).isEqualTo(savedShipping.getDetail().getStartAt().toLocalDate());
+	}
+
+	@Test
+	@DisplayName("대여 Id로 OutBound 배송 정보를 찾을 수 없어 예외가 발생한다")
+	void getTrackingNumber_notFoundShipping() {
+		// given
+		Long nonExistRentalId = 999L;
+
+		// when & then
+		assertThatThrownBy(() -> shippingService.getTrackingNumber(nonExistRentalId))
+			.isInstanceOf(BusinessException.class)
+			.hasMessage(ShippingError.SHIPPING_NOT_FOUND.getMessage());
+	}
+
 	private void flushAndClear() {
 		entityManager.flush();
 		entityManager.clear();