tests/: Add helper.c unit tests

BUG=b:157280555
BRANCH=none
TEST=builds

Change-Id: If4a1fe7c499f51bb9d7cd48ef26caf9dfae3c1fa
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/41655
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

tests/helpers.c

@@ -0,0 +1,64 @@
+#include <include/test.h>
+
+#include "flash.h"
+
+#include <stdint.h>
+#include <stdlib.h>
+
+
+void address_to_bits_test_success(void **state)
+{
+	(void) state; /* unused */
+	assert_int_equal(16, address_to_bits(0xAA55));
+}
+
+void bitcount_test_success(void **state)
+{
+	(void) state; /* unused */
+	assert_int_equal(4, bitcount(0xAA));
+}
+
+void minmax_test_success(void **state)
+{
+	(void) state; /* unused */
+	assert_int_equal(0x55, min(0xAA, 0x55));
+	assert_int_equal(0xAA, max(0xAA, 0x55));
+}
+
+void strcat_realloc_test_success(void **state)
+{
+	(void) state; /* unused */
+	const char src0[] = "hello";
+	const char src1[] = " world";
+	char *dest = calloc(1, 1);
+	dest = strcat_realloc(dest, src0);
+	dest = strcat_realloc(dest, src1);
+	assert_string_equal("hello world", dest);
+	free(dest);
+}
+
+void tolower_string_test_success(void **state)
+{
+	(void) state; /* unused */
+	char str[] = "HELLO AGAIN";
+	assert_string_equal("HELLO AGAIN", str);
+	tolower_string(str);
+	assert_string_equal("hello again", str);
+}
+
+void reverse_byte_test_success(void **state)
+{
+	(void) state; /* unused */
+	assert_int_equal(0x5A, reverse_byte(0x5A));
+	assert_int_equal(0x0F, reverse_byte(0xF0));
+}
+
+void reverse_bytes_test_success(void **state)
+{
+	(void) state; /* unused */
+	uint8_t src[] = { 0xAA, 0x55 };
+	uint8_t dst[2];
+	reverse_bytes(dst, src, 2);
+	assert_int_equal(src[0], dst[1]);
+	assert_int_equal(src[1], dst[0]);
+}

tests/meson.build

@@ -2,6 +2,7 @@ root_includes = include_directories('../subprojects')
 
 srcs = [
   'tests.c',
+  'helpers.c',
   'flashrom.c',
   'spi25.c',
 ]

tests/tests.c

@@ -21,6 +21,17 @@ int main(void)
 {
 	int ret = 0;
 
+	const struct CMUnitTest helpers_tests[] = {
+		cmocka_unit_test(address_to_bits_test_success),
+		cmocka_unit_test(bitcount_test_success),
+		cmocka_unit_test(minmax_test_success),
+		cmocka_unit_test(strcat_realloc_test_success),
+		cmocka_unit_test(tolower_string_test_success),
+		cmocka_unit_test(reverse_byte_test_success),
+		cmocka_unit_test(reverse_bytes_test_success),
+	};
+	ret |= cmocka_run_group_tests_name("helpers.c tests", helpers_tests, NULL, NULL);
+
 	const struct CMUnitTest flashrom_tests[] = {
 		cmocka_unit_test(flashbuses_to_text_test_success),
 	};

tests/tests.h

@@ -1,6 +1,15 @@
 #ifndef TESTS_H
 #define TESTS_H
 
+/* helpers.c */
+void address_to_bits_test_success(void **state);
+void bitcount_test_success(void **state);
+void minmax_test_success(void **state);
+void strcat_realloc_test_success(void **state);
+void tolower_string_test_success(void **state);
+void reverse_byte_test_success(void **state);
+void reverse_bytes_test_success(void **state);
+
 /* flashrom.c */
 void flashbuses_to_text_test_success(void **state);