cli: Add a command to show cmdline history

There is a function for this but it is never used. Showing the history is
a useful feature, so add a new 'history' command.

Signed-off-by: Simon Glass <sjg@chromium.org>

2 files changed, 50 insertions, 0 deletions

diff --git a/test/cmd/Makefile b/test/cmd/Makefile
index 6e3d7e9..8d70ac5 100644
--- a/test/cmd/Makefile
+++ b/test/cmd/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_CMD_ADDRMAP) += addrmap.o
 obj-$(CONFIG_CMD_BDI) += bdinfo.o
 obj-$(CONFIG_CMD_FDT) += fdt.o
 obj-$(CONFIG_CONSOLE_TRUETYPE) += font.o
+obj-$(CONFIG_CMD_HISTORY) += history.o
 obj-$(CONFIG_CMD_LOADM) += loadm.o
 obj-$(CONFIG_CMD_MEM_SEARCH) += mem_search.o
 ifdef CONFIG_CMD_PCI
diff --git a/test/cmd/history.c b/test/cmd/history.c
new file mode 100644
index 0000000..06517fc
--- /dev/null
+++ b/test/cmd/history.c
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Tests for history command
+ *
+ * Copyright 2023 Google LLC
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#include <common.h>
+#include <cli.h>
+#include <command.h>
+#include <test/lib.h>
+#include <test/test.h>
+#include <test/ut.h>
+
+static int lib_test_history(struct unit_test_state *uts)
+{
+	static const char cmd1[] = "setenv fred hello";
+	static const char cmd2[] = "print fred";
+
+	/* running commands directly does not add to history */
+	ut_assertok(run_command(cmd1, 0));
+	ut_assert_console_end();
+	ut_assertok(run_command("history", 0));
+	ut_assert_console_end();
+
+	/* enter commands via the console */
+	console_in_puts(cmd1);
+	console_in_puts("\n");
+	ut_asserteq(strlen(cmd1), cli_readline(""));
+	ut_assert_nextline(cmd1);
+
+	console_in_puts(cmd2);
+	console_in_puts("\n");
+	ut_asserteq(strlen(cmd2), cli_readline(""));
+	ut_assert_nextline(cmd2);
+
+	ut_assertok(run_command("print fred", 0));
+	ut_assert_nextline("fred=hello");
+	ut_assert_console_end();
+
+	ut_assertok(run_command("history", 0));
+	ut_assert_nextline(cmd1);
+	ut_assert_nextline(cmd2);
+	ut_assert_console_end();
+
+	return 0;
+}
+LIB_TEST(lib_test_history, UT_TESTF_CONSOLE_REC);