test: Add framework to test hush behavior

Introduce a new subcommand to ut: ut hush.
For the moment, this command does nothing, future commits will add tests which
will be run on command call.

Note that CONFIG_HUSH_PARSER must be defined to compile this new subcommand.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/test/hush/cmd_ut_hush.c b/test/hush/cmd_ut_hush.c
new file mode 100644
index 0000000..48a1adb
--- /dev/null
+++ b/test/hush/cmd_ut_hush.c
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) Copyright 2021
+ * Francis Laniel, Amarula Solutions, francis.laniel@amarulasolutions.com
+ */
+
+#include <common.h>
+#include <command.h>
+#include <test/hush.h>
+#include <test/suites.h>
+#include <test/ut.h>
+
+int do_ut_hush(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
+{
+	struct unit_test *tests = UNIT_TEST_SUITE_START(hush_test);
+	const int n_ents = UNIT_TEST_SUITE_COUNT(hush_test);
+
+	return cmd_ut_category("hush", "hush_test_",
+			       tests, n_ents, argc, argv);
+}