add unit test case

@@ -13,6 +13,20 @@ import static java.math.BigDecimal.ROUND_HALF_UP;
 public class SellerEarnestMoney2BuyerPenaltyCalculatorTest {
 
     @Test
+    public void testCalculate(){
+
+        String feeMetaValStr = "{\"bankTransferfee\":0.09,\"earnestMoney\":{\"earnestMoney\":1,\"max\":4,\"min\":1,\"prdSalePrice\":9,\"rate\":0.04},\"income\":8.26,\"platformFee\":{\"appraiseFee\":0.10,\"packageFee\":0.10,\"serviceFee\":0.45,\"total\":0.65},\"serviceFeeRate\":{\"goodsPaymentRate\":0.05,\"goodsPaymentRatePercent\":\"5.00%\",\"payChannelPercent\":\"1.00%\",\"payChannelRate\":0.01}}";
+
+        SellerOrderMeta feeMeta = new SellerOrderMeta();
+        feeMeta.setUid(500031170);
+        feeMeta.setSkup(16720);
+        feeMeta.setMetaKey("fee");
+        feeMeta.setMetaValue(feeMetaValStr);
+        PenaltyResult penaltyResult = SellerEarnestMoney2BuyerPenaltyCalculator.from(feeMeta).calculate().orElse(null);
+        System.out.println("in testCalculate penaltyResult ->" + penaltyResult);
+    }
+
+    @Test
     public void calculate() {
         JSONObject feeMetaValue = new JSONObject()
                 .fluentPut("bankTransferfee", 0.01)