Add rendering test

package.json

@@ -18,12 +18,12 @@
         "node-dijkstra": "^2.5.0",
         "paper-jsdom": "^0.12.17"
     },
-    "main": "./exports.js",
-    "scripts": {
-        "test": "node test/pathfinder.test.js"
-    },
-    "devDependencies": {
-        "babelify": "^10.0.0",
-        "@babel/core": "^7.20.12"
-    }
-}
+    "main": "./exports.js",
+    "scripts": {
+        "test": "node test/pathfinder.test.js && node test/render.test.js"
+    },
+    "devDependencies": {
+        "@babel/core": "^7.20.12",
+        "babelify": "^10.0.0"
+    }
+}

test/render.test.js

@@ -0,0 +1,38 @@
+const assert = require('assert');
+const fs = require('fs');
+const { Renderer, MapReader, Settings } = require('../exports');
+
+const data = [
+    {
+        areaId: 1,
+        areaName: 'A1',
+        rooms: [
+            { id: 1, exits: { e: 2 }, specialExits: {}, customLines: {}, doors: {}, weight: 1, x: 0, y: 0, z: 0 },
+            { id: 2, exits: { w: 1, e: 3 }, specialExits: {}, customLines: {}, doors: {}, weight: 1, x: 1, y: 0, z: 0 },
+            { id: 3, exits: { w: 2 }, specialExits: {}, customLines: {}, doors: {}, weight: 1, x: 2, y: 0, z: 0 },
+        ],
+        labels: [],
+    },
+];
+
+const reader = new MapReader(data, []);
+const area = reader.getArea(1, 0);
+const settings = new Settings();
+const padding = 7;
+const bounds = area.getAreaBounds();
+const width = (bounds.maxX - bounds.minX + padding * 2) * settings.scale;
+const height = (bounds.maxY - bounds.minY + padding * 2) * settings.scale;
+
+const renderer = new Renderer(null, reader, reader.getColors(), settings);
+renderer.isVisual = false;
+renderer.renderArea(area);
+
+
+const outPath = 'test/render-output.svg';
+fs.writeFileSync(outPath, renderer.exportSvg(1, padding));
+assert.ok(fs.existsSync(outPath));
+const stats = fs.statSync(outPath);
+assert.ok(stats.size > 0);
+fs.unlinkSync(outPath);
+
+console.log('Render test passed.');