Restructure project layout and clean up test suite

Move sources to src/, header to inc/, and tests to tests/src/.
Update Makefiles and .gitignore for the new layout.

Refactor test harness: add crash-wrapper macros (_S_CRASH,
_S_CRASH_I, _S_CRASH_V, _S_CRASH_BUF) replacing 58 hand-written
wrappers, add shared _s_test_int_range helper eliminating duplicate
_s_test_func, add _S_RAND_ITERS constant, move srand() to main()
in all test binaries, and add Doxygen comments to test_utils.h.

1 files changed, 76 insertions, 0 deletions

diff --git a/tests/src/test_strlen.c b/tests/src/test_strlen.c
new file mode 100644
index 0000000..15f317b
--- /dev/null
+++ b/tests/src/test_strlen.c
@@ -0,0 +1,76 @@
+#include "libft.h"
+#include "test_utils.h"
+
+_S_CRASH (ft_strlen_null, ft_strlen (NULL))
+_S_CRASH (strlen_null, strlen (NULL))
+
+static void
+_s_test_empty (void)
+{
+  _s_check_eq ("ft_strlen", ft_strlen (""), 0);
+  _s_check_eq ("libc strlen", strlen (""), 0);
+}
+
+static void
+_s_test_null (void)
+{
+  _s_check_both_crash ("strlen NULL", _s_crash_ft_strlen_null,
+                       _s_crash_strlen_null);
+}
+
+static void
+_s_test_random (int n)
+{
+  int i;
+  int len;
+  char *buf;
+  char label[64];
+
+  for (i = 0; i < n; i++)
+    {
+      len = rand () % 10000;
+      buf = malloc (len + 1);
+      if (!buf)
+        {
+          _s_check ("malloc", 0);
+          return;
+        }
+      memset (buf, 'A' + (i % 26), len);
+      buf[len] = '\0';
+      snprintf (label, sizeof (label), "random len=%d", len);
+      _s_check_eq (label, ft_strlen (buf), strlen (buf));
+      free (buf);
+    }
+}
+
+static void
+_s_test_large (void)
+{
+  size_t len;
+  char *buf;
+
+  len = 100 * 1024 * 1024;
+  buf = malloc (len + 1);
+  if (!buf)
+    {
+      printf ("  SKIP could not allocate %zu bytes\n", len);
+      return;
+    }
+  memset (buf, 'X', len);
+  buf[len] = '\0';
+  _s_check_eq ("100 MB string", ft_strlen (buf), len);
+  free (buf);
+}
+
+int
+main (void)
+{
+  srand (time (NULL));
+  _s_section ("ft_strlen");
+  _s_test_empty ();
+  _s_test_null ();
+  _s_test_random (100);
+  _s_test_large ();
+  _s_print_results ();
+  return (_s_fail != 0);
+}