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

    public function testExtractKatakanaWithLengthEqualsNWhenKatakanaOnly()
    {
        $result = Helper::extractKatakana($this->katakanaCharacters, 2);
        $this->assertEquals(array('カタ', 'カナ'), $result);
    }