cmd: Add pause command

This command is being introduced with the goal of allowing user-friendly
"generic use case" U-Boot builds to pause until user input under some
situations.

The main use case would be when a boot failure happens, to pause until
the user has had time to acknowledge the current state.

Tested using:

    make && ./u-boot -v -T -c 'ut lib lib_test_hush_pause'

Signed-off-by: Samuel Dionne-Riel <samuel@dionne-riel.com>
Cc: Simon Glass <sjg@chromium.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/test/cmd/test_pause.c b/test/cmd/test_pause.c
new file mode 100644
index 00000000000..2b85cce3271
--- /dev/null
+++ b/test/cmd/test_pause.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Tests for pause command
+ *
+ * Copyright 2022, Samuel Dionne-Riel <samuel@dionne-riel.com>
+ */
+
+#include <common.h>
+#include <asm/global_data.h>
+#include <test/lib.h>
+#include <test/ut.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int lib_test_hush_pause(struct unit_test_state *uts)
+{
+	/* Test default message */
+	console_record_reset_enable();
+	/* Cook a newline when the command is expected to pause */
+	console_in_puts("\n");
+	ut_assertok(run_command("pause", 0));
+	console_record_readline(uts->actual_str, sizeof(uts->actual_str));
+	ut_asserteq_str("Press any key to continue...", uts->actual_str);
+	ut_assertok(ut_check_console_end(uts));
+
+	/* Test provided message */
+	console_record_reset_enable();
+	/* Cook a newline when the command is expected to pause */
+	console_in_puts("\n");
+	ut_assertok(run_command("pause 'Prompt for pause...'", 0));
+	console_record_readline(uts->actual_str, sizeof(uts->actual_str));
+	ut_asserteq_str("Prompt for pause...", uts->actual_str);
+	ut_assertok(ut_check_console_end(uts));
+
+	/* Test providing more than one params */
+	console_record_reset_enable();
+	/* No newline cooked here since the command is expected to fail */
+	ut_asserteq(1, run_command("pause a b", 0));
+	console_record_readline(uts->actual_str, sizeof(uts->actual_str));
+	ut_asserteq_str("pause - delay until user input", uts->actual_str);
+	ut_asserteq(1, ut_check_console_end(uts));
+
+	return 0;
+}
+LIB_TEST(lib_test_hush_pause, 0);