Function checkBtnAttr

test/jasmine/tests/modebar_test.js:79–82

(modeBar, index, attr)

    }

    function checkBtnAttr(modeBar, index, attr) {
        var buttons = d3Select(modeBar.element).selectAll('button.modebar-btn, a.modebar-btn');
        return d3Select(buttons[0][index]).attr(attr);
    }

    var buttons = [[{
        name: 'button 1',