Check json conversion in build3d.js

Author: linev

demo/node/build3d.js

@@ -1,6 +1,6 @@
 import { httpRequest, create, openFile, treeDraw, build3d } from 'jsroot';
 
-async function test3d(obj, opt, title) {
+async function test3d(obj, opt, title, json_reflength = -1) {
    if (!obj) {
       console.error(`No object provided for ${title}`);
       return null;
@@ -13,7 +13,15 @@ async function test3d(obj, opt, title) {
       return null;
    }
 
-   console.log(`${title}  Ok`);
+   if (json_reflength <= 0)
+      console.log(`${title}  Ok`);
+   else {
+      let json = JSON.stringify(obj3d.toJSON());
+      if (Math.abs(json.length - json_reflength) / json_reflength > 0.01)
+         console.error(`${title}  FAILURE json ${json.length} too much differ from refernce ${json_reflength}`);
+      else
+         console.log(`${title}  OK json ${json.length}`);
+   }
 
    return obj3d;
 }
@@ -26,19 +34,19 @@ let server = 'https://root.cern/js/files/',
 let file = await openFile(filename);
 let hist2 = await file.readObject('hpxpy');
 
-await test3d(hist2, 'lego2', 'TH2 lego plot');
+await test3d(hist2, 'lego2', 'TH2 lego plot', 6916869);
 
 let tuple = await file.readObject('ntuple');
 let hist3 = await treeDraw(tuple, 'px:py:pz;hbins:15');
 
-await test3d(hist3, 'box3', 'TH3 box plot');
+await test3d(hist3, 'box3', 'TH3 box plot', 4223457);
 
 let hist1 = await file.readObject('hpx');
 
-await test3d(hist1, 'lego2', 'TH1 lego plot');
+await test3d(hist1, 'lego2', 'TH1 lego plot', 3332953);
 
 let geom = await httpRequest(filename3, 'object');
-await test3d(geom, '', 'Geometry build');
+await test3d(geom, '', 'Geometry build', 1811230);
 
 let file2 = await openFile(filename2);
 let gr2 = await file2.readObject('Graph2D');
@@ -51,4 +59,4 @@ latex.fTextAlign = 22;
 latex.fTextColor = 3;
 latex.fTextSize = 10;
 
-await test3d(latex, '', 'TLatex drawing');
+await test3d(latex, '', 'TLatex drawing', 457275);