增加统一倍率调整按钮

backend/internal/postgres/billing_bulk_test.go

@@ -0,0 +1,32 @@
+package postgres
+
+import (
+	"context"
+	"errors"
+	"reflect"
+	"strings"
+	"testing"
+
+	"git.nianxx.cn/wangxuming/NianAIGC/backend/internal/billing"
+)
+
+func TestUpdateBillingPriceRulesUsesSingleGuardedStatement(t *testing.T) {
+	q := &fakeQuerier{}
+	db := NewDatabase(Config{Backend: BackendPostgres}, q)
+	patch := billing.BulkPricePatch{RuleIDs: []string{"first", "second"}, MarkupMultiplier: 1.75}
+	if _, err := db.UpdateBillingPriceRules(context.Background(), patch); !errors.Is(err, billing.ErrPriceNotFound) {
+		t.Fatalf("empty result error = %v", err)
+	}
+	if q.sql != UpdateBillingPriceRulesSQL || !reflect.DeepEqual(q.args, []any{patch.RuleIDs, patch.MarkupMultiplier}) {
+		t.Fatalf("query = %q, args = %#v", q.sql, q.args)
+	}
+	for _, clause := range []string{"FOR UPDATE", "count(*) = cardinality($1::text[])", "AND (SELECT all_present FROM eligible)", "jsonb_set(tier.value", "UPDATE public.billing_price_rules"} {
+		if !strings.Contains(q.sql, clause) {
+			t.Fatalf("missing atomic bulk update clause %q", clause)
+		}
+	}
+	q.sql = ""
+	if _, err := db.UpdateBillingPriceRules(context.Background(), billing.BulkPricePatch{MarkupMultiplier: 2}); !errors.Is(err, billing.ErrPriceNotFound) || q.sql != "" {
+		t.Fatalf("empty ID list issued a query: %q, %v", q.sql, err)
+	}
+}