Add StaticStringy::hasUpperCase, StaticStringy::hasLowerCase, Stringy->hasUpperCase and Stringy->hasLowerCase along with tests.

src/StaticStringy.php

@@ -747,6 +747,18 @@ class StaticStringy
         return Stringy::create($str, $encoding)->isLowerCase();
     }
 
+    /**
+     * Returns whether the given string has any lower case characters in it.
+     *
+     * @param  string $str      String to check
+     * @param  string $encoding The character encoding
+     * @return bool   Whether or not $str contains a lower case character.
+     */
+    public static function hasLowerCase($str, $encoding = null)
+    {
+        return Stringy::create($str, $encoding)->hasLowerCase();
+    }
+
     /**
      * Returns true if the string is serialized, false otherwise.
      *
@@ -772,6 +784,18 @@ class StaticStringy
         return Stringy::create($str, $encoding)->isUpperCase();
     }
 
+    /**
+     * Returns whether the given string has any upper case characters in it.
+     *
+     * @param  string $str      String to check
+     * @param  string $encoding The character encoding
+     * @return bool   Whether or not $str contains an upper case character.
+     */
+    public static function hasUpperCase($str, $encoding = null)
+    {
+        return Stringy::create($str, $encoding)->hasUpperCase();
+    }
+
     /**
      * Returns true if the string contains only hexadecimal chars, false
      * otherwise.

src/Stringy.php

@@ -1333,6 +1333,17 @@ class Stringy implements \Countable, \IteratorAggregate, \ArrayAccess
         return $this->matchesPattern('^[[:lower:]]*$');
     }
 
+    /**
+     * Returns true if the string contains a lower case char, false
+     * otherwise.
+     *
+     * @return bool Whether or not the string contains a lower case character.
+     */
+    public function hasLowerCase()
+    {
+        return $this->matchesPattern('.*[[:lower:]]');
+    }
+
     /**
      * Returns true if the string contains only lower case chars, false
      * otherwise.
@@ -1344,6 +1355,17 @@ class Stringy implements \Countable, \IteratorAggregate, \ArrayAccess
         return $this->matchesPattern('^[[:upper:]]*$');
     }
 
+    /**
+     * Returns true if the string contains an upper case char, false
+     * otherwise.
+     *
+     * @return bool Whether or not the string contains an upper case character.
+     */
+    public function hasUpperCase()
+    {
+        return $this->matchesPattern('.*[[:upper:]]');
+    }
+
     /**
      * Returns true if the string is serialized, false otherwise.
      *