public static function convertHiraganaToKatakana($str) { return mb_convert_kana($str, 'C', 'UTF-8'); }
public function testConvertHiraganaToKatakanaWhenMixCharacters() { $result = Helper::convertHiraganaToKatakana($this->mixCharacters); $this->assertEquals('今日、Joo「ジョオ」ハ学校ニイマス。', $result); }