JBZoo\PHPUnit\DataTest::testHas PHP Method

    public function testHas()
    {
        $data = new Data($this->_test);
        isFalse($data->has('undefined'));
        isTrue($data->has('null'));
        isTrue($data->has('string-empty'));
        isTrue($data->has('string-zero'));
        isTrue($data->has('number-zero'));
        isTrue($data->has('array_empty'));
        isTrue($data->has('array_not_empty'));
    }