test: Record and silence console in tests

When running sandbox tests, silence the console to avoid unwanted output.
Also, record the console in case tests want to check it.

The -v option can be used to enable stdout during tests.

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

arch/sandbox/cpu/start.c

@@ -257,6 +257,14 @@ static int sandbox_cmdline_cb_terminal(struct sandbox_state *state,
 SANDBOX_CMDLINE_OPT_SHORT(terminal, 't', 1,
 			  "Set terminal to raw/cooked mode");
 
+static int sandbox_cmdline_cb_verbose(struct sandbox_state *state,
+				      const char *arg)
+{
+	state->show_test_output = true;
+	return 0;
+}
+SANDBOX_CMDLINE_OPT_SHORT(verbose, 'v', 0, "Show test output");
+
 int main(int argc, char *argv[])
 {
 	struct sandbox_state *state;

arch/sandbox/include/asm/state.h

@@ -64,6 +64,7 @@ struct sandbox_state {
 	bool reset_allowed[RESET_COUNT];	/* Allowed reset types */
 	enum state_terminal_raw term_raw;	/* Terminal raw/cooked */
 	bool skip_delays;		/* Ignore any time delays (for test) */
+	bool show_test_output;		/* Don't suppress stdout in tests */
 
 	/* Pointer to information for each SPI bus/cs */
 	struct sandbox_spi_info spi[CONFIG_SANDBOX_SPI_MAX_BUS]

test/dm/test-main.c

@@ -76,6 +76,7 @@ static int dm_test_main(const char *test_name)
 	struct unit_test *tests = ll_entry_start(struct unit_test, dm_test);
 	const int n_ents = ll_entry_count(struct unit_test, dm_test);
 	struct unit_test_state *uts = &global_dm_test_state;
+	struct sandbox_state *state = state_get_current();
 	uts->priv = &_global_priv_dm_test_state;
 	struct unit_test *test;
 	int run_count;
@@ -114,7 +115,15 @@ static int dm_test_main(const char *test_name)
 		if (test->flags & DM_TESTF_SCAN_FDT)
 			ut_assertok(dm_scan_fdt(gd->fdt_blob, false));
 
+		/*
+		 * Silence the console and rely on console reocrding to get
+		 * our output.
+		 */
+		console_record_reset();
+		if (!state->show_test_output)
+			gd->flags |= GD_FLG_SILENT;
 		test->func(uts);
+		gd->flags &= ~GD_FLG_SILENT;
 		state_set_skip_delays(false);
 
 		ut_assertok(dm_test_destroy(uts));

test/ut.c

@@ -10,9 +10,12 @@
 #include <test/test.h>
 #include <test/ut.h>
 
+DECLARE_GLOBAL_DATA_PTR;
+
 void ut_fail(struct unit_test_state *uts, const char *fname, int line,
 	     const char *func, const char *cond)
 {
+	gd->flags &= ~(GD_FLG_SILENT | GD_FLG_RECORD);
 	printf("%s:%d, %s(): %s\n", fname, line, func, cond);
 	uts->fail_count++;
 }
@@ -22,6 +25,7 @@ void ut_failf(struct unit_test_state *uts, const char *fname, int line,
 {
 	va_list args;
 
+	gd->flags &= ~(GD_FLG_SILENT | GD_FLG_RECORD);
 	printf("%s:%d, %s(): %s: ", fname, line, func, cond);
 	va_start(args, fmt);
 	vprintf(fmt, args);