Function _check

test/jasmine/tests/histogram2d_test.js:498–501

(msg, xpx, ypx, lines)

        it('shows the data range when bins have no value in it', function(done) {
            function _check(msg, xpx, ypx, lines) {
                _hover(xpx, ypx);
                assertHoverLabelContent({nums: lines.join('\n')}, msg);
            }

            Plotly.newPlot('graph', [{
                type: 'histogram2d',