Function _assert

test/jasmine/tests/treemap_test.js:1345–1350

(msg, exp)

        var mock = Lib.extendDeep({}, require('../../image/mocks/treemap_first.json'));

        function _assert(msg, exp) {
            return function () {
                var layer = d3Select(gd).select('.treemaplayer');
                expect(layer.selectAll('.trace').size()).toBe(exp, msg);
            };
        }

        Plotly.newPlot(gd, mock)
            .then(_assert('base', 2))