test: unit test for crc8

Add a unit test for the crc8() function.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/test/lib/Makefile b/test/lib/Makefile
index 7e7922fe3b4d17a2b6b528c1a88c88a1f73b123a..e0bd9e04e8f3427340d41c5792d91ba486497e62 100644 (file)
--- a/test/lib/Makefile
+++ b/test/lib/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_UT_LIB_ASN1) += asn1.o
 obj-$(CONFIG_UT_LIB_RSA) += rsa.o
 obj-$(CONFIG_AES) += test_aes.o
 obj-$(CONFIG_GETOPT) += getopt.o
+obj-$(CONFIG_CRC8) += test_crc8.o
 obj-$(CONFIG_UT_LIB_CRYPT) += test_crypt.o
 else
 obj-$(CONFIG_SANDBOX) += kconfig_spl.o

diff --git a/test/lib/test_crc8.c b/test/lib/test_crc8.c
new file mode 100644 (file)
index 0000000..0dac97b
--- /dev/null
+++ b/test/lib/test_crc8.c
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2023, Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
+ *
+ * Unit test for crc8
+ */
+
+#include <test/lib.h>
+#include <test/ut.h>
+#include <u-boot/crc.h>
+
+static int lib_crc8(struct unit_test_state *uts) {
+       const char str[] = {0x20, 0xf4, 0xd8, 0x24, 0x6f, 0x41, 0x91, 0xae,
+                           0x46, 0x61, 0xf6, 0x55, 0xeb, 0x38, 0x47, 0x0f,
+                           0xec, 0xd8};
+       int actual1, actual2, actual3;
+       int expected1 = 0x47, expected2 = 0xea, expected3 = expected1;
+
+       actual1 = crc8(0, str, sizeof(str));
+       ut_asserteq(expected1, actual1);
+       actual2 = crc8(0, str, 7);
+       ut_asserteq(expected2, actual2);
+       actual3 = crc8(actual2, str + 7, sizeof(str) - 7);
+       ut_asserteq(expected3, actual3);
+
+       return 0;
+}
+
+LIB_TEST(lib_crc8, 0);