Function TestInitConn_HelloFallback_ModeEnabled

internal_maint_notif_test.go:256–278

TestInitConn_HelloFallback_ModeEnabled verifies that when the server rejects HELLO (so the connection falls back to RESP2) and the user has explicitly requested ModeEnabled with Protocol: 3, initConn fails with a clear RESP3-related error instead of silently sending a meaningless CLIENT MAINT_NOTIFI

(t *testing.T)

// clear RESP3-related error instead of silently sending a meaningless
// CLIENT MAINT_NOTIFICATIONS command on a RESP2 connection.
func TestInitConn_HelloFallback_ModeEnabled(t *testing.T) {
	srv := startMockRESP2Server(t)
	defer srv.Close()

	opt := &Options{
		Addr:     srv.Addr(),
		Protocol: 3,
		MaintNotificationsConfig: &maintnotifications.Config{
			Mode: maintnotifications.ModeEnabled,
		},
	}
	opt.init()

	c := newTestBaseClient(opt)
	err := initConnOnMockServer(t, c, srv)
	if err == nil {
		t.Fatalf("expected initConn to fail when HELLO falls back to RESP2 with ModeEnabled, got nil")
	}
	if !strings.Contains(err.Error(), "RESP3") {
		t.Fatalf("expected error to mention RESP3, got %v", err)
	}
	assertNoMaintNotifications(t, srv)
}

// TestInitConn_HelloFallback_ModeAuto verifies that when HELLO is rejected
// and ModeAuto is configured, initConn succeeds without sending CLIENT