Function _drag

test/jasmine/tests/polar_test.js:872–875

(p0, dp)

        var resetNumber = 0;

        function _drag(p0, dp) {
            var node = d3Select('.polar > .draglayer > .maindrag').node();
            return drag({node: node, dpos: dp, pos0: p0});
        }

        function _assertRange(rng, msg) {
            expect(gd._fullLayout.polar.radialaxis.range).toBeCloseToArray(rng, 1, msg);