update

src/main/java/com/gogirl/application/user/customer/impl/CustomerBalanceServiceImpl.java

@@ -181,6 +181,7 @@ public class CustomerBalanceServiceImpl extends ServiceImpl<CustomerBalanceMappe
         CustomerBalance targetCustomerBalance = customerBalanceMapper.getByCustomerId(targetCustomer.getId());
         if (targetCustomerBalance == null) {
             targetCustomerBalance = new CustomerBalance();
+            targetCustomerBalance.setBalance(0);
             targetCustomerBalance.setCustomerId(targetCustomer.getId());
             customerBalanceMapper.insert(targetCustomerBalance);
         }

src/test/java/com/gogirl/application/user/customer/impl/CustomerBalanceServiceImplTest.java

@@ -28,7 +28,6 @@ public class CustomerBalanceServiceImplTest {
 
     @org.junit.Test
     public void transferBalance() {
-        customerBalanceService.transferBalance("18021011577", "18221011577");
-        customerBalanceService.transferBalance("14714400703", "59347034");
+        customerBalanceService.transferBalance("96827361", "18559161648");
     }
 }