shanshanzhong
9987bd43fa
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统一处理百分比和系数两种折扣输入方式，增加边界保护 在金额计算中使用math.Round进行四舍五入处理 添加相关单元测试确保计算准确性
32 lines
834 B
Go
32 lines
834 B
Go
package order
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import (
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"testing"
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"github.com/perfect-panel/server/internal/model/coupon"
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)
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func TestCalculateCoupon_Percent(t *testing.T) {
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c := &coupon.Coupon{Type: 1, Discount: 10}
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got := calculateCoupon(1000, c)
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if got != 100 {
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t.Fatalf("percent coupon expected 100, got %d", got)
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}
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}
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func TestCalculateCoupon_PercentRounding(t *testing.T) {
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c := &coupon.Coupon{Type: 1, Discount: 10}
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got := calculateCoupon(999, c) // 999*10% = 99.9 → round to 100
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if got != 100 {
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t.Fatalf("percent coupon rounding expected 100, got %d", got)
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}
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}
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func TestCalculateCoupon_FixedCap(t *testing.T) {
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c := &coupon.Coupon{Type: 2, Discount: 300}
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got := calculateCoupon(200, c)
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if got != 200 {
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t.Fatalf("fixed coupon capped by amount expected 200, got %d", got)
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}
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}
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