Add test to ensure the correct draw canvas size

test/spec/ol/renderer/canvas/tilelayer.test.js

@@ -0,0 +1,48 @@
+goog.provide('ol.test.renderer.canvas.TileLayer');
+
+goog.require('ol.transform');
+goog.require('ol.layer.Tile');
+goog.require('ol.renderer.Map');
+goog.require('ol.renderer.canvas.TileLayer');
+goog.require('ol.source.XYZ');
+
+
+describe('ol.renderer.canvas.TileLayer', function() {
+
+  describe('#composeFrame()', function() {
+    it('uses correct draw scale when rotating (HiDPI)', function() {
+      var layer = new ol.layer.Tile({
+        source: new ol.source.XYZ()
+      });
+      var renderer = new ol.renderer.canvas.TileLayer(layer);
+      renderer.renderedTiles = [];
+      var frameState = {
+        viewState: {
+          center: [2, 3],
+          projection: ol.proj.get('EPSG:3857'),
+          resolution: 1,
+          rotation: Math.PI
+        },
+        size: [10, 10],
+        pixelRatio: 2,
+        coordinateToPixelTransform: ol.transform.create(),
+        pixelToCoordinateTransform: ol.transform.create()
+      };
+      renderer.getImageTransform = function() {
+        return ol.transform.create();
+      };
+      ol.renderer.Map.prototype.calculateMatrices2D(frameState);
+      var layerState = layer.getLayerState();
+      var canvas = document.createElement('canvas');
+      canvas.width = 200;
+      canvas.height = 100;
+      var context = {
+        canvas: canvas,
+        drawImage: sinon.spy()
+      };
+      renderer.composeFrame(frameState, layerState, context);
+      expect(context.drawImage.firstCall.args[0].width).to.be(112);
+    });
+  });
+
+});

test/spec/ol/source/tilewms.test.js

@@ -265,11 +265,13 @@ describe('ol.source.TileWMS', function() {
   });
 
   describe('#setUrl()', function() {
-    var source = new ol.source.TileWMS(options);
-    var url = 'http://foo/';
-    source.setUrl(url);
-    var tileUrl = source.tileUrlFunction([0, 0, 0], 1, ol.proj.get('EPSG:4326'));
-    expect(tileUrl.indexOf(url)).to.be(0);
+    it('sets the correct url', function() {
+      var source = new ol.source.TileWMS(options);
+      var url = 'http://foo/';
+      source.setUrl(url);
+      var tileUrl = source.tileUrlFunction([0, 0, 0], 1, ol.proj.get('EPSG:4326'));
+      expect(tileUrl.indexOf(url)).to.be(0);
+    });
   });
 
   describe('#setUrls()', function() {