Function checkButtonColor

test/jasmine/tests/range_selector_test.js:486–494

(bgColor, activeColor)

    }

    function checkButtonColor(bgColor, activeColor) {
        d3SelectAll('.button').each(function(d) {
            var rect = d3Select(this).select('rect');

            expect(rect.node().style.fill).toEqual(
                d._isActive ? activeColor : bgColor
            );
        });
    }

    it('should display the correct nodes and can hide buttons', function(done) {
        var allButtons = mockCopy.layout.xaxis.rangeselector.buttons.length;