实现套餐生效条件覆盖与购买快照

internal/domain/package/terms_test.go

@@ -0,0 +1,35 @@
+package packagedomain
+
+import (
+	"testing"
+
+	"github.com/break/junhong_cmp_fiber/internal/model"
+	"github.com/break/junhong_cmp_fiber/pkg/constants"
+)
+
+// TestResolveTermsSnapshot 验证默认、覆盖及两种周期规则。
+func TestResolveTermsSnapshot(t *testing.T) {
+	override := constants.PackageExpiryBaseFromPurchase
+	tests := []struct {
+		name       string
+		pkg        model.Package
+		allocation *model.ShopPackageAllocation
+		wantErr    bool
+	}{
+		{name: "自然月默认", pkg: model.Package{ExpiryBase: constants.PackageExpiryBaseFromActivation, CalendarType: constants.PackageCalendarTypeNaturalMonth, DurationMonths: 12}},
+		{name: "按天覆盖", pkg: model.Package{ExpiryBase: constants.PackageExpiryBaseFromActivation, CalendarType: constants.PackageCalendarTypeByDay, DurationDays: 30}, allocation: &model.ShopPackageAllocation{ExpiryBaseOverride: &override}},
+		{name: "非法生效条件", pkg: model.Package{ExpiryBase: "invalid", CalendarType: constants.PackageCalendarTypeByDay, DurationDays: 30}, wantErr: true},
+		{name: "非法按天时长", pkg: model.Package{ExpiryBase: constants.PackageExpiryBaseFromPurchase, CalendarType: constants.PackageCalendarTypeByDay}, wantErr: true},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			got, err := ResolveTermsSnapshot(&test.pkg, test.allocation)
+			if (err != nil) != test.wantErr {
+				t.Fatalf("错误状态不符合预期：%v", err)
+			}
+			if !test.wantErr && !got.IsValid() {
+				t.Fatalf("快照应有效：%+v", got)
+			}
+		})
+	}
+}