Function assertVisibility

test/jasmine/tests/surface_test.js:165–168

(exp, msg)

        });

        function assertVisibility(exp, msg) {
            expect(gd._fullData[0]).not.toBe(undefined, 'no visibility!');
            expect(gd._fullData[0].visible).toBe(exp, msg);
        }

        it('@gl surface should be invisible when the z array is empty', function(done) {
            Plotly.newPlot(gd, [{