test_def.c

00001 #include "test_def.h"
00002 
00003 #include "lwip/def.h"
00004 
00005 #define MAGIC_UNTOUCHED_BYTE  0x7a
00006 #define TEST_BUFSIZE          32
00007 #define GUARD_SIZE            4
00008 
00009 /* Setups/teardown functions */
00010 
00011 static void
00012 def_setup(void)
00013 {
00014 }
00015 
00016 static void
00017 def_teardown(void)
00018 {
00019 }
00020 
00021 static void
00022 def_check_range_untouched(const char *buf, size_t len)
00023 {
00024   size_t i;
00025 
00026   for (i = 0; i < len; i++) {
00027     fail_unless(buf[i] == (char)MAGIC_UNTOUCHED_BYTE);
00028   }
00029 }
00030 
00031 static void test_def_itoa(int number, const char *expected)
00032 {
00033   char buf[TEST_BUFSIZE];
00034   char *test_buf = &buf[GUARD_SIZE];
00035 
00036   size_t exp_len = strlen(expected);
00037   fail_unless(exp_len + 4 < (TEST_BUFSIZE - (2 * GUARD_SIZE)));
00038 
00039   memset(buf, MAGIC_UNTOUCHED_BYTE, sizeof(buf));
00040   lwip_itoa(test_buf, exp_len + 1, number);
00041   def_check_range_untouched(buf, GUARD_SIZE);
00042   fail_unless(test_buf[exp_len] == 0);
00043   fail_unless(!memcmp(test_buf, expected, exp_len));
00044   def_check_range_untouched(&test_buf[exp_len + 1], TEST_BUFSIZE - GUARD_SIZE - exp_len - 1);
00045 
00046   /* check with too small buffer */
00047   memset(buf, MAGIC_UNTOUCHED_BYTE, sizeof(buf));
00048   lwip_itoa(test_buf, exp_len, number);
00049   def_check_range_untouched(buf, GUARD_SIZE);
00050   def_check_range_untouched(&test_buf[exp_len + 1], TEST_BUFSIZE - GUARD_SIZE - exp_len - 1);
00051 
00052   /* check with too large buffer */
00053   memset(buf, MAGIC_UNTOUCHED_BYTE, sizeof(buf));
00054   lwip_itoa(test_buf, exp_len + 4, number);
00055   def_check_range_untouched(buf, GUARD_SIZE);
00056   fail_unless(test_buf[exp_len] == 0);
00057   fail_unless(!memcmp(test_buf, expected, exp_len));
00058   def_check_range_untouched(&test_buf[exp_len + 4], TEST_BUFSIZE - GUARD_SIZE - exp_len - 4);
00059 }
00060 
00061 START_TEST(test_def_lwip_itoa)
00062 {
00063   LWIP_UNUSED_ARG(_i);
00064 
00065   test_def_itoa(0, "0");
00066   test_def_itoa(1, "1");
00067   test_def_itoa(-1, "-1");
00068   test_def_itoa(15, "15");
00069   test_def_itoa(-15, "-15");
00070   test_def_itoa(156, "156");
00071   test_def_itoa(1192, "1192");
00072   test_def_itoa(-156, "-156");
00073 }
00074 END_TEST
00075 
00076 /** Create the suite including all tests for this module */
00077 Suite *
00078 def_suite(void)
00079 {
00080   testfunc tests[] = {
00081     TESTFUNC(test_def_lwip_itoa)
00082   };
00083   return create_suite("DEF", tests, sizeof(tests)/sizeof(testfunc), def_setup, def_teardown);
00084 }