tests: Move 'wait-for-X11-display' helper to MetaContextTest

Gets rid of a un-prefixed helper function relying on a global singleton.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1861>

1 files changed, 25 insertions, 0 deletions

diff --git a/src/tests/unit-tests.h b/src/tests/unit-tests.h
new file mode 100644
index 000000000..30f24979e
--- /dev/null
+++ b/src/tests/unit-tests.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2021 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef UNIT_TESTS_H
+#define UNIT_TESTS_H
+
+#include "meta/meta-context.h"
+
+extern MetaContext *test_context;
+
+#endif /* UNIT_TESTS_H */