P1问题fix

longz

2026-07-17 da9b7a52dbc6fcd2173efef90528d8fccc322554

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package com.ruoyi.order.service.impl;
 
import com.ruoyi.other.api.domain.TCoupon;
import org.junit.jupiter.api.Test;
 
import java.math.BigDecimal;
 
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
 
class ChargingCouponSupportTest {
 
    @Test
    void fullReductionDiscountsThePrepaymentBeforeThirdPartyPay() {
        TCoupon coupon = chargingCoupon(1);
        coupon.setMeetTheConditions(new BigDecimal("3"));
        coupon.setDiscountAmount(new BigDecimal("1"));
 
        BigDecimal discount = ChargingCouponSupport.calculateUpfrontDiscount(coupon, new BigDecimal("3"));
 
        assertEquals(new BigDecimal("1.00"), discount);
        assertEquals(new BigDecimal("2.00"), new BigDecimal("3").subtract(discount));
    }
 
    @Test
    void percentageDiscountHonorsMaximumDiscount() {
        TCoupon coupon = chargingCoupon(2);
        coupon.setMeetTheConditions(new BigDecimal("10"));
        coupon.setDiscount(new BigDecimal("8"));
        coupon.setMaximumDiscountAmount(new BigDecimal("1.50"));
 
        BigDecimal discount = ChargingCouponSupport.calculateUpfrontDiscount(coupon, new BigDecimal("10"));
 
        assertEquals(new BigDecimal("1.50"), discount);
    }
 
    @Test
    void rejectsPrepaymentBelowCouponThreshold() {
        TCoupon coupon = chargingCoupon(1);
        coupon.setMeetTheConditions(new BigDecimal("3"));
        coupon.setDiscountAmount(new BigDecimal("1"));
 
        IllegalArgumentException error = assertThrows(IllegalArgumentException.class,
                () -> ChargingCouponSupport.calculateUpfrontDiscount(coupon, new BigDecimal("2.99")));
 
        assertEquals("预付金额未达到优惠券使用门槛", error.getMessage());
    }
 
    private TCoupon chargingCoupon(int preferentialMode) {
        TCoupon coupon = new TCoupon();
        coupon.setType(1);
        coupon.setPreferentialMode(preferentialMode);
        return coupon;
    }
}