tests/object/raw/convert.c

   1
   2 #include "clar_libgit2.h"
   3
   4 #include "odb.h"
   5
   6 void test_object_raw_convert__succeed_on_oid_to_string_conversion(void)
   7 {
   8         const char *exp = "16a0123456789abcdef4b775213c23a8bd74f5e0";
   9         git_oid in;
  10         char out[GIT_OID_HEXSZ + 1];
  11         char *str;
  12         int i;
  13
  14         cl_git_pass(git_oid_fromstr(&in, exp));
  15
  16         /* NULL buffer pointer, returns static empty string */
  17         str = git_oid_tostr(NULL, sizeof(out), &in);
  18         cl_assert(str && *str == '\0' && str != out);
  19
  20         /* zero buffer size, returns static empty string */
  21         str = git_oid_tostr(out, 0, &in);
  22         cl_assert(str && *str == '\0' && str != out);
  23
  24         /* NULL oid pointer, sets existing buffer to empty string */
  25         str = git_oid_tostr(out, sizeof(out), NULL);
  26         cl_assert(str && *str == '\0' && str == out);
  27
  28         /* n == 1, returns out as an empty string */
  29         str = git_oid_tostr(out, 1, &in);
  30         cl_assert(str && *str == '\0' && str == out);
  31
  32         for (i = 1; i < GIT_OID_HEXSZ; i++) {
  33                 out[i+1] = 'Z';
  34                 str = git_oid_tostr(out, i+1, &in);
  35                 /* returns out containing c-string */
  36                 cl_assert(str && str == out);
  37                 /* must be '\0' terminated */
  38                 cl_assert(*(str+i) == '\0');
  39                 /* must not touch bytes past end of string */
  40                 cl_assert(*(str+(i+1)) == 'Z');
  41                 /* i == n-1 charaters of string */
  42                 cl_git_pass(strncmp(exp, out, i));
  43         }
  44
  45         /* returns out as hex formatted c-string */
  46         str = git_oid_tostr(out, sizeof(out), &in);
  47         cl_assert(str && str == out && *(str+GIT_OID_HEXSZ) == '\0');
  48         cl_assert_equal_s(exp, out);
  49 }
  50
  51 void test_object_raw_convert__succeed_on_oid_to_string_conversion_big(void)
  52 {
  53         const char *exp = "16a0123456789abcdef4b775213c23a8bd74f5e0";
  54         git_oid in;
  55         char big[GIT_OID_HEXSZ + 1 + 3]; /* note + 4 => big buffer */
  56         char *str;
  57
  58         cl_git_pass(git_oid_fromstr(&in, exp));
  59
  60         /* place some tail material */
  61         big[GIT_OID_HEXSZ+0] = 'W'; /* should be '\0' afterwards */
  62         big[GIT_OID_HEXSZ+1] = 'X'; /* should remain untouched   */
  63         big[GIT_OID_HEXSZ+2] = 'Y'; /* ditto */
  64         big[GIT_OID_HEXSZ+3] = 'Z'; /* ditto */
  65
  66         /* returns big as hex formatted c-string */
  67         str = git_oid_tostr(big, sizeof(big), &in);
  68         cl_assert(str && str == big && *(str+GIT_OID_HEXSZ) == '\0');
  69         cl_assert_equal_s(exp, big);
  70
  71         /* check tail material is untouched */
  72         cl_assert(str && str == big && *(str+GIT_OID_HEXSZ+1) == 'X');
  73         cl_assert(str && str == big && *(str+GIT_OID_HEXSZ+2) == 'Y');
  74         cl_assert(str && str == big && *(str+GIT_OID_HEXSZ+3) == 'Z');
  75 }
  76
  77 static void check_partial_oid(
  78         char *buffer, size_t count, const git_oid *oid, const char *expected)
  79 {
  80         git_oid_nfmt(buffer, count, oid);
  81         buffer[count] = '\0';
  82         cl_assert_equal_s(expected, buffer);
  83 }
  84
  85 void test_object_raw_convert__convert_oid_partially(void)
  86 {
  87         const char *exp = "16a0123456789abcdef4b775213c23a8bd74f5e0";
  88         git_oid in;
  89         char big[GIT_OID_HEXSZ + 1 + 3]; /* note + 4 => big buffer */
  90
  91         cl_git_pass(git_oid_fromstr(&in, exp));
  92
  93         git_oid_nfmt(big, sizeof(big), &in);
  94         cl_assert_equal_s(exp, big);
  95
  96         git_oid_nfmt(big, GIT_OID_HEXSZ + 1, &in);
  97         cl_assert_equal_s(exp, big);
  98
  99         check_partial_oid(big, 1, &in, "1");
 100         check_partial_oid(big, 2, &in, "16");
 101         check_partial_oid(big, 3, &in, "16a");
 102         check_partial_oid(big, 4, &in, "16a0");
 103         check_partial_oid(big, 5, &in, "16a01");
 104
 105         check_partial_oid(big, GIT_OID_HEXSZ, &in, exp);
 106         check_partial_oid(
 107                 big, GIT_OID_HEXSZ - 1, &in, "16a0123456789abcdef4b775213c23a8bd74f5e");
 108         check_partial_oid(
 109                 big, GIT_OID_HEXSZ - 2, &in, "16a0123456789abcdef4b775213c23a8bd74f5");
 110         check_partial_oid(
 111                 big, GIT_OID_HEXSZ - 3, &in, "16a0123456789abcdef4b775213c23a8bd74f");
 112 }