--- /dev/null
+/*
+ * Copyright © 2020 Nick Bowler
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "test-fooable.h"
+
+GType test_fooable_get_type(void)
+{
+ static const GTypeInfo info = { sizeof (TestFooableIface), 0, 0 };
+ static GType type = 0;
+
+ if (!type) {
+ type = g_type_register_static(G_TYPE_INTERFACE,
+ "TestFooable", &info, 0);
+ }
+
+ return type;
+}
+
+int test_foo(GObject *go)
+{
+ g_return_val_if_fail(TEST_IS_FOOABLE(go), -1);
+
+ return TEST_FOOABLE_GET_INTERFACE(go)->foo(go);
+}