实现套餐生效条件覆盖与购买快照

internal/service/package/terms_test.go

@@ -0,0 +1,57 @@
+package packagepkg
+
+import (
+	"testing"
+
+	"github.com/break/junhong_cmp_fiber/internal/model"
+	"github.com/break/junhong_cmp_fiber/pkg/constants"
+)
+
+// TestValidateExpiryBaseOverride 验证覆盖字段必须显式提交且仅接受既定枚举。
+func TestValidateExpiryBaseOverride(t *testing.T) {
+	fromPurchase := constants.PackageExpiryBaseFromPurchase
+	invalid := "from_realname"
+	tests := []struct {
+		name      string
+		value     *string
+		submitted bool
+		wantValue *string
+		wantErr   bool
+	}{
+		{name: "字段缺失", wantErr: true},
+		{name: "跟随默认", submitted: true},
+		{name: "购买即生效", value: &fromPurchase, submitted: true, wantValue: &fromPurchase},
+		{name: "非法枚举", value: &invalid, submitted: true, wantErr: true},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			got, err := ValidateExpiryBaseOverride(test.value, test.submitted)
+			if (err != nil) != test.wantErr {
+				t.Fatalf("错误状态不符合预期：%v", err)
+			}
+			if test.wantValue != nil && (got == nil || *got != *test.wantValue) {
+				t.Fatalf("覆盖值不符合预期：%v", got)
+			}
+			if test.wantValue == nil && !test.wantErr && got != nil {
+				t.Fatalf("期望跟随默认，实际为：%v", *got)
+			}
+		})
+	}
+}
+
+// TestEffectiveExpiryBase 验证覆盖优先于套餐默认值。
+func TestEffectiveExpiryBase(t *testing.T) {
+	pkg := &model.Package{ExpiryBase: constants.PackageExpiryBaseFromActivation}
+	if got := EffectiveExpiryBase(pkg, nil); got != constants.PackageExpiryBaseFromActivation {
+		t.Fatalf("无覆盖时应使用套餐默认值，实际为 %s", got)
+	}
+	override := constants.PackageExpiryBaseFromPurchase
+	allocation := &model.ShopPackageAllocation{ExpiryBaseOverride: &override}
+	if got := EffectiveExpiryBase(pkg, allocation); got != constants.PackageExpiryBaseFromPurchase {
+		t.Fatalf("有覆盖时应使用覆盖值，实际为 %s", got)
+	}
+	pkg.ExpiryBase = constants.PackageExpiryBaseFromPurchase
+	if got := EffectiveExpiryBase(pkg, allocation); got != constants.PackageExpiryBaseFromPurchase {
+		t.Fatalf("套餐默认值变化不应改变覆盖结果，实际为 %s", got)
+	}
+}