firstleg/src/main/java/com/baiyue/firstleg/service/CustomerDimensionWeightingService.java

@@ -72,7 +72,7 @@ public class CustomerDimensionWeightingService {
             return rules.stream()
                 .filter(rule -> rule.contains(measured))
                 .findFirst()
-                .map(Rule::weighted)
+                .map(rule -> rule.weightedActualDimensions(lengthCm, widthCm, heightCm))
                 .orElseGet(() -> actualDimensions(lengthCm, widthCm, heightCm));
         }
 

firstleg/src/test/java/com/baiyue/firstleg/service/CustomerDimensionWeightingServiceTest.java

@@ -38,6 +38,18 @@ class CustomerDimensionWeightingServiceTest {
         assertThat(weighted.unitVolumeCbm()).isEqualByComparingTo("0.003");
     }
 
+    @Test
+    void deviceMeasurementsUseActualDimensionsAndAddEachSideWhenRuleMatches() {
+        var weighted = service.load(10001L).resolveDeviceMeasurement(
+            new BigDecimal("10"), new BigDecimal("10"), new BigDecimal("10"));
+
+        assertThat(weighted.boxType()).isEqualTo(CustomerDimensionBoxType.SMALL);
+        assertThat(weighted.outerLengthCm()).isEqualByComparingTo("14.000");
+        assertThat(weighted.outerWidthCm()).isEqualByComparingTo("14.000");
+        assertThat(weighted.outerHeightCm()).isEqualByComparingTo("14.000");
+        assertThat(weighted.calculationRuleVersion()).isEqualTo("CUSTOMER_DIMENSION_SMALL_V3");
+    }
+
     @Test
     void cartonRotationDoesNotChangeTheMatchedRule() {
         var weighted = service.load(10001L).resolve(