Add test for surface plot data

Author: robertoffmoura

plotly/Test_plotlyfig.m

@@ -267,6 +267,46 @@ function testScatter3DPlotData(tc)
             ));
         end
 
+        function testSurfacePlotData(tc)
+            fig = figure("Visible","off");
+            points = linspace(-2, 2, 40);
+            [x, y] = meshgrid(points, points);
+            z = 2./exp((x-0.5).^2+y.^2)-2./exp((x+0.5).^2+y.^2);
+            surf(x, y, z)
+
+            p = plotlyfig(fig,"visible","off");
+
+            tc.verifyNumElements(p.data, 1);
+            tc.verifyEqual(rmfield(p.data{1}, ["colorscale" "surfacecolor"]), struct( ...
+                "xaxis", "x1", ...
+                "yaxis", "y1", ...
+                "type", 'surface', ...
+                "x", x, ...
+                "y", y, ...
+                "z", z, ...
+                "contours", struct( ...
+                    "x", struct( ...
+                        "start", -2, ...
+                        "end", 2, ...
+                        "size", 0.102564102564103, ...
+                        "show", true, ...
+                        "color", 'black' ...
+                    ), ...
+                    "y", struct( ...
+                        "start", -2, ...
+                        "end", 2, ...
+                        "size", 0.102564102564103, ...
+                        "show", true, ...
+                        "color", 'black' ...
+                    ) ...
+                ), ...
+                "name", '', ...
+                "showscale", false, ...
+                "visible", true, ...
+                "showlegend", true ...
+            ), AbsTol=1e-15);
+        end
+
         function testPolarPlotData(tc)
             fig = figure("Visible","off");
             t = 0:0.01:2*pi;