Test run of GraphViz generation in Node

GraphVizTest.js

var viz = require('viz.js');
var fs = require('fs');

var svg2png = require("svg2png");
var result = viz("digraph { x -> y -> z; }", { format: "svg" });

svg2png(result)
        .then(buffer => fs.writeFile("dest.png", buffer))
        .catch(e => console.error(e));