fix: complete development acceptance paths

lastleg-service/src/test/java/com/baiyue/lastleg/inventory/query/controller/InventoryQueryControllerTest.java

@@ -4,6 +4,7 @@ import com.baiyue.common.security.AuthenticatedUser;
 import com.baiyue.lastleg.inventory.query.dto.InventoryQueryRequests;
 import com.baiyue.lastleg.inventory.query.service.InventoryQueryService;
 import org.junit.jupiter.api.Test;
+import org.springframework.http.ResponseEntity;
 import org.springframework.test.util.ReflectionTestUtils;
 import org.springframework.web.server.ResponseStatusException;
 
@@ -13,6 +14,7 @@ import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
 
 class InventoryQueryControllerTest {
     private final InventoryQueryService service = mock(InventoryQueryService.class);
@@ -44,6 +46,33 @@ class InventoryQueryControllerTest {
         verify(service).dashboard(eq(null), eq(query));
     }
 
+    @Test
+    void balanceExportIsMaterializedBeforeReturningResponse() {
+        byte[] csv = "\uFEFFcustomerId\r\n10001\r\n".getBytes(java.nio.charset.StandardCharsets.UTF_8);
+        when(service.exportBalances("10001", query)).thenReturn(csv);
+
+        ResponseEntity<byte[]> response = controller.exportBalances(user(0L, "PLATFORM"), "10001", query);
+
+        org.junit.jupiter.api.Assertions.assertArrayEquals(csv, response.getBody());
+        org.junit.jupiter.api.Assertions.assertEquals("text/csv;charset=UTF-8",
+            response.getHeaders().getContentType().toString());
+        verify(service).exportBalances("10001", query);
+    }
+
+    @Test
+    void ledgerExportIsMaterializedBeforeReturningResponse() {
+        InventoryQueryRequests.LedgerQuery ledgerQuery = new InventoryQueryRequests.LedgerQuery(
+            1L, 20L, null, null, null, null, null, null, null, null, null, null, null, null, null);
+        byte[] csv = "\uFEFFoccurredAt\r\n".getBytes(java.nio.charset.StandardCharsets.UTF_8);
+        when(service.exportLedgers("10001", ledgerQuery)).thenReturn(csv);
+
+        ResponseEntity<byte[]> response = controller.exportLedgers(
+            user(0L, "PLATFORM"), "10001", ledgerQuery);
+
+        org.junit.jupiter.api.Assertions.assertArrayEquals(csv, response.getBody());
+        verify(service).exportLedgers("10001", ledgerQuery);
+    }
+
     @Test
     void unauthenticatedPositionDetailIsRejected() {
         InventoryQueryRequests.PositionQuery positionQuery =