tests/os_simple_hash.c

   1 #include <darwintest.h>
   2 #include <stdlib.h>
   3 #include <os/stdlib.h>
   4
   5 T_DECL(os_simple_hash, "sanity check of os_simple_hash",
   6                 T_META_ALL_VALID_ARCHS(true))
   7 {
   8         const char * string =
   9                         "We made the buttons on the screen look so good you'll want to lick them.";
  10         uint64_t hashval = os_simple_hash_string(string);
  11         T_EXPECT_NE(hashval, 0ULL, "usually should get a non-0 hash value");
  12
  13         char buf[1024];
  14         arc4random_buf(buf, sizeof(buf));
  15         hashval = os_simple_hash(buf, sizeof(buf));
  16         T_EXPECT_NE(hashval, 0ULL, "usually should get a non-0 hash value");
  17 }
  18
  19 T_DECL(os_simple_hash_seeds, "os_simple_hash different seeds give different hashes",
  20                 T_META_ALL_VALID_ARCHS(true))
  21 {
  22         const char * string =
  23                         "We made the buttons on the screen look so good you'll want to lick them.";
  24
  25         uint64_t hashval0 = os_simple_hash_string_with_seed(string, 0x0);
  26         T_EXPECT_NE(hashval0, 0ULL, "usually should get a non-0 hash value");
  27         uint64_t hashval1 = os_simple_hash_string_with_seed(string, 0x1);
  28         T_EXPECT_NE(hashval1, 0ULL, "usually should get a non-0 hash value");
  29         uint64_t hashvalF = os_simple_hash_string_with_seed(string, 0xF);
  30         T_EXPECT_NE(hashvalF, 0ULL, "usually should get a non-0 hash value");
  31         uint64_t hashvalFoo = os_simple_hash_string_with_seed(string, 0xF0000000);
  32         T_EXPECT_NE(hashvalFoo, 0ULL, "usually should get a non-0 hash value");
  33
  34         T_EXPECT_NE(hashval0, hashval1, NULL);
  35         T_EXPECT_NE(hashval0, hashvalF, NULL);
  36         T_EXPECT_NE(hashval0, hashvalFoo, NULL);
  37         T_EXPECT_NE(hashval1, hashvalF, NULL);
  38         T_EXPECT_NE(hashval1, hashvalFoo, NULL);
  39         T_EXPECT_NE(hashvalF, hashvalFoo, NULL);
  40 }