Implement libft Part 2 with tests

Add ft_substr, ft_strjoin, ft_strtrim, ft_split, ft_itoa,
ft_strmapi, ft_striteri, ft_putchar_fd, ft_putstr_fd,
ft_putendl_fd, ft_putnbr_fd.

1 files changed, 108 insertions, 0 deletions

diff --git a/tests/src/test_strmapi.c b/tests/src/test_strmapi.c
new file mode 100644
index 0000000..31dba65
--- /dev/null
+++ b/tests/src/test_strmapi.c
@@ -0,0 +1,108 @@
+#include "libft.h"
+#include "test_utils.h"
+#include <ctype.h>
+
+_S_CRASH (ft_strmapi_null, ft_strmapi (NULL, NULL))
+
+static char
+_s_to_upper (unsigned int i, char c)
+{
+  (void)i;
+  return (toupper (c));
+}
+
+static char
+_s_add_index (unsigned int i, char c)
+{
+  return (c + i);
+}
+
+static void
+_s_test_strmapi (void)
+{
+  int i;
+  char label[128];
+
+  _s_section ("ft_strmapi");
+
+  /* NULL crashes */
+  _s_check ("NULL crashes", _s_crashes (_s_crash_ft_strmapi_null));
+
+  /* basic: to uppercase */
+  {
+    char *p = ft_strmapi ("hello", _s_to_upper);
+    _s_check ("to_upper", p && strcmp (p, "HELLO") == 0);
+    free (p);
+  }
+
+  /* function receives correct index */
+  {
+    char *p = ft_strmapi ("aaaa", _s_add_index);
+    _s_check ("index passed",
+              p && p[0] == 'a' && p[1] == 'b' && p[2] == 'c' && p[3] == 'd');
+    free (p);
+  }
+
+  /* empty string */
+  {
+    char *p = ft_strmapi ("", _s_to_upper);
+    _s_check ("empty", p && strcmp (p, "") == 0);
+    free (p);
+  }
+
+  /* returns independent copy */
+  {
+    char s[] = "hello";
+    char *p = ft_strmapi (s, _s_to_upper);
+    _s_check ("independent ptr", p && p != s);
+    _s_check ("original unchanged", strcmp (s, "hello") == 0);
+    free (p);
+  }
+
+  /* single character */
+  {
+    char *p = ft_strmapi ("a", _s_to_upper);
+    _s_check ("single char", p && strcmp (p, "A") == 0);
+    free (p);
+  }
+
+  /* randomized: apply to_upper, compare with manual */
+  for (i = 0; i < _S_RAND_ITERS; i++)
+    {
+      int len = rand () % 200 + 1;
+      char *src = malloc (len + 1);
+      char *expected = malloc (len + 1);
+      char *p;
+      int j;
+
+      if (!src || !expected)
+        {
+          free (src);
+          free (expected);
+          continue;
+        }
+      for (j = 0; j < len; j++)
+        {
+          src[j] = 'a' + rand () % 26;
+          expected[j] = toupper (src[j]);
+        }
+      src[len] = '\0';
+      expected[len] = '\0';
+
+      p = ft_strmapi (src, _s_to_upper);
+      snprintf (label, sizeof (label), "random len=%d", len);
+      _s_check (label, p && strcmp (p, expected) == 0);
+      free (src);
+      free (expected);
+      free (p);
+    }
+}
+
+int
+main (void)
+{
+  srand (time (NULL));
+  _s_test_strmapi ();
+  _s_print_results ();
+  return (_s_fail != 0);
+}