JpnForPhp\Tests\Helper\HelperTest::testConvertKatakanaToHiraganaWhenNoKatakana PHP Method

    public function testConvertKatakanaToHiraganaWhenNoKatakana()
    {
        $result = Helper::convertKatakanaToHiragana($this->hiraganaCharacters);
        $this->assertEquals($this->hiraganaCharacters, $result);
    }