1 files changed, 78 insertions, 0 deletions
diff --git a/tests/printf_unit_test.c b/tests/printf_unit_test.c
new file mode 100644
index 0000000..098c29f
--- /dev/null
+++ b/tests/printf_unit_test.c
@@ -0,0 +1,78 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2011 Free Software Foundation, Inc.
+ *
+ *  GRUB 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 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <grub/test.h>
+#include <grub/misc.h>
+
+#define MSG "printf test failed: %s, %s", real, expected
+
+#if defined(__GNUC__) && __GNUC__ >= 7
+#pragma GCC diagnostic ignored "-Wformat-truncation="
+#endif
+
+static void
+printf_test (void)
+{
+  char real[512];
+  char expected[512];
+  char *null = NULL;
+
+  grub_snprintf (real, sizeof (real), "%s", null);
+  snprintf (expected, sizeof (expected), "%s", null);
+  grub_test_assert (strcmp (real, expected) == 0, MSG);
+
+  grub_snprintf (real, sizeof (real), "%10s", null);
+  snprintf (expected, sizeof (expected), "%10s", null);
+  grub_test_assert (strcmp (real, expected) == 0, MSG);
+
+  grub_snprintf (real, sizeof (real), "%-10s", null);
+  snprintf (expected, sizeof (expected), "%-10s", null);
+  grub_test_assert (strcmp (real, expected) == 0, MSG);
+
+  grub_snprintf (real, sizeof (real), "%d%%", 10);
+  snprintf (expected, sizeof (expected), "%d%%", 10);
+  grub_test_assert (strcmp (real, expected) == 0, MSG);
+
+  grub_snprintf (real, sizeof (real), "%d %%", 10);
+  snprintf (expected, sizeof (expected), "%d %%", 10);
+  grub_test_assert (strcmp (real, expected) == 0, MSG);
+
+  grub_snprintf (real, sizeof (real), "%%");
+  snprintf (expected, sizeof (expected), "%%");
+  grub_test_assert (strcmp (real, expected) == 0, MSG);
+
+  grub_snprintf (real, sizeof (real), "%d %d %d", 1, 2, 3);
+  snprintf (expected, sizeof (expected), "%d %d %d", 1, 2, 3);
+  grub_test_assert (strcmp (real, expected) == 0, MSG);
+  grub_snprintf (real, sizeof (real), "%3$d %2$d %1$d", 1, 2, 3);
+  snprintf (expected, sizeof (expected), "%3$d %2$d %1$d", 1, 2, 3);
+  grub_test_assert (strcmp (real, expected) == 0, MSG);
+  grub_snprintf (real, sizeof (real), "%d %lld %d", 1, 2LL, 3);
+  snprintf (expected, sizeof (expected), "%d %lld %d", 1, 2LL, 3);
+  grub_test_assert (strcmp (real, expected) == 0, MSG);
+  grub_snprintf (real, sizeof (real), "%3$d %2$lld %1$d", 1, 2LL, 3);
+  snprintf (expected, sizeof (expected), "%3$d %2$lld %1$d", 1, 2LL, 3);
+  grub_test_assert (strcmp (real, expected) == 0, MSG);
+  grub_snprintf (real, sizeof (real), "%%0%dd ", 1);
+  snprintf (expected, sizeof (expected), "%%0%dd ", 1);
+  grub_test_assert (strcmp (real, expected) == 0, MSG);
+}
+
+GRUB_UNIT_TEST ("printf_unit_test", printf_test);