Organize tests

test/rendering/cases/single-layer/main.js

@@ -0,0 +1,21 @@
+import Map from '../../../../src/ol/Map.js';
+import TileLayer from '../../../../src/ol/layer/Tile.js';
+import View from '../../../../src/ol/View.js';
+import XYZ from '../../../../src/ol/source/XYZ.js';
+
+new Map({
+  layers: [
+    new TileLayer({
+      source: new XYZ({
+        url: '/data/tiles/satellite/{z}/{x}/{y}.jpg',
+      }),
+    }),
+  ],
+  target: 'map',
+  view: new View({
+    center: [0, 0],
+    zoom: 0,
+  }),
+});
+
+render({message: 'A single layer with a XZY source'});