fix: 핀 조회 요청에 사용자 위치 검증 추가

Author: mike7643

src/main/java/com/zimdugo/locker/entrypoint/dto/request/pin/LockerPinRequest.java

@@ -6,6 +6,7 @@
 import com.zimdugo.locker.application.filter.LockerSizeFilterType;
 import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.constraints.AssertTrue;
 import jakarta.validation.constraints.DecimalMax;
 import jakarta.validation.constraints.DecimalMin;
 import java.util.Set;
@@ -65,6 +66,11 @@ public record LockerPinRequest(
     @Parameter(description = "보관함 유형 필터")
     Set<LockerFacilityFilterType> lockerTypes
 ) {
+    @AssertTrue(message = "validation.user_location_required")
+    public boolean hasUserLocation() {
+        return lat != null && lng != null;
+    }
+
     public LockerPinQuery toQuery() {
         return new LockerPinQuery(
             swLat,

src/test/java/com/zimdugo/locker/entrypoint/dto/request/pin/LockerPinRequestTest.java

@@ -0,0 +1,69 @@
+package com.zimdugo.locker.entrypoint.dto.request.pin;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class LockerPinRequestTest {
+
+    @Test
+    @DisplayName("사용자 기준 좌표는 키워드와 무관하게 항상 필요하다")
+    void rejectsMissingLocationEvenWithoutKeyword() {
+        LockerPinRequest request = new LockerPinRequest(
+            37.54,
+            126.92,
+            37.56,
+            126.94,
+            13.0,
+            null,
+            null,
+            null,
+            null,
+            null,
+            null
+        );
+
+        assertThat(request.hasUserLocation()).isFalse();
+    }
+
+    @Test
+    @DisplayName("키워드 검색이면 기준 좌표가 없을 때도 유효하지 않다")
+    void rejectsMissingKeywordLocation() {
+        LockerPinRequest request = new LockerPinRequest(
+            37.54,
+            126.92,
+            37.56,
+            126.94,
+            13.0,
+            null,
+            null,
+            "station",
+            null,
+            null,
+            null
+        );
+
+        assertThat(request.hasUserLocation()).isFalse();
+    }
+
+    @Test
+    @DisplayName("사용자 기준 좌표가 모두 있으면 유효하다")
+    void acceptsCompleteLocation() {
+        LockerPinRequest request = new LockerPinRequest(
+            37.54,
+            126.92,
+            37.56,
+            126.94,
+            13.0,
+            37.55,
+            126.93,
+            "station",
+            null,
+            null,
+            null
+        );
+
+        assertThat(request.hasUserLocation()).isTrue();
+    }
+}