var test = {
    /**
     * Before bracket init
     */
    ['a']: '1',
    [/*
     * Inside bracket init
     */
    'b']: '2',
    ['c'    /*
            * After bracket key
            */]: '3',
    // Before bracket, line comment
    ['d']: '4',
    [// Inside bracket, line comment
    'e']: '5',
    ['f'    // After bracket, line comment
]: '6'
};