Add evaluate DNS rule action and related rule items

option/dns_test.go

@@ -0,0 +1,54 @@
+package option
+
+import (
+	"context"
+	"testing"
+
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing/common/json"
+	"github.com/sagernet/sing/service"
+
+	"github.com/stretchr/testify/require"
+)
+
+type stubDNSTransportOptionsRegistry struct{}
+
+func (stubDNSTransportOptionsRegistry) CreateOptions(transportType string) (any, bool) {
+	switch transportType {
+	case C.DNSTypeUDP:
+		return new(RemoteDNSServerOptions), true
+	case C.DNSTypeFakeIP:
+		return new(FakeIPDNSServerOptions), true
+	default:
+		return nil, false
+	}
+}
+
+func TestDNSOptionsRejectsLegacyFakeIPOptions(t *testing.T) {
+	t.Parallel()
+
+	ctx := service.ContextWith[DNSTransportOptionsRegistry](context.Background(), stubDNSTransportOptionsRegistry{})
+	var options DNSOptions
+	err := json.UnmarshalContext(ctx, []byte(`{
+		"fakeip": {
+			"enabled": true,
+			"inet4_range": "198.18.0.0/15"
+		}
+	}`), &options)
+	require.EqualError(t, err, legacyDNSFakeIPRemovedMessage)
+}
+
+func TestDNSServerOptionsRejectsLegacyFormats(t *testing.T) {
+	t.Parallel()
+
+	ctx := service.ContextWith[DNSTransportOptionsRegistry](context.Background(), stubDNSTransportOptionsRegistry{})
+	testCases := []string{
+		`{"address":"1.1.1.1"}`,
+		`{"type":"legacy","address":"1.1.1.1"}`,
+	}
+	for _, content := range testCases {
+		var options DNSServerOptions
+		err := json.UnmarshalContext(ctx, []byte(content), &options)
+		require.EqualError(t, err, legacyDNSServerRemovedMessage)
+	}
+}