Add test for xy_streql_ic()

lib/xy.h

@@ -383,24 +383,24 @@ static bool
 xy_streql_ic(const char *str1, const char *str2)
 {
   if (NULL == str1 || NULL == str2)
-  {
-    return false;
-  }
+    {
+      return false;
+    }
 
   size_t len1 = strlen(str1);
   size_t len2 = strlen(str2);
   if (len1 != len2)
-  {
-    return false;
-  }
-
-  for (size_t i = 0; i < len1; i++)
-  {
-    if (tolower(str1[i]) != tolower(str2[i]))
     {
       return false;
     }
-  }
+
+  for (size_t i = 0; i < len1; i++)
+    {
+      if (tolower(str1[i]) != tolower(str2[i]))
+        {
+          return false;
+        }
+    }
   return true;
 }
 

test/xy.c

@@ -6,7 +6,7 @@
  * Contributors  :  Nil Null  <nil@null.org>
  *               |
  * Created On    : <2023-08-30>
- * Last Modified : <2025-06-20>
+ * Last Modified : <2025-08-08>
  *
  * Test xy.h
  * ------------------------------------------------------------*/
@@ -57,6 +57,11 @@ main (int argc, char const *argv[])
   xy_warn_brkt  ("xy.h", "警告", "兰州牛肉面，而非兰州拉面");
   xy_error_brkt ("xy.h", "错误", "西安肉丸胡辣汤里没有肉丸");
 
+  assert (xy_streql    ("abc", "abc"));
+  assert (xy_streql_ic ("abc", "abc"));
+  assert (false == xy_streql ("abc", "abC"));
+  assert (true  == xy_streql_ic ("abc", "abC"));
+
   assert (false == xy_str_end_with ("abcdef", "abcdefg"));
   assert (xy_str_end_with ("abcdef", "def"));