Add tests for ol.renderer.Layer#loadImage

test/spec/ol/renderer/layerrenderer.test.js

@@ -0,0 +1,89 @@
+goog.provide('ol.test.renderer.Layer');
+
+describe('ol.renderer.Layer', function() {
+  var renderer;
+  var eventType = goog.events.EventType.CHANGE;
+
+  beforeEach(function() {
+    var map = new ol.Map({});
+    var mapRenderer = map.getRenderer();
+    var layer = new ol.layer.Layer({});
+    renderer = new ol.renderer.Layer(mapRenderer, layer);
+  });
+
+  describe('#loadImage', function() {
+    var image;
+    var imageLoadFunction;
+
+    beforeEach(function() {
+      var extent = [];
+      var resolution = 1;
+      var pixelRatio = 1;
+      var attributions = [];
+      var src = '';
+      var crossOrigin = '';
+      imageLoadFunction = sinon.spy();
+      image = new ol.Image(extent, resolution, pixelRatio, attributions,
+          src, crossOrigin, imageLoadFunction);
+    });
+
+    describe('load IDLE image', function() {
+
+      it('returns false', function() {
+        var loaded = renderer.loadImage(image);
+        expect(loaded).to.be(false);
+      });
+
+      it('registers a listener', function() {
+        renderer.loadImage(image);
+        var listeners = image.getListeners(eventType, false);
+        expect(listeners).to.have.length(1);
+      });
+
+    });
+
+    describe('load LOADED image', function() {
+
+      it('returns true', function() {
+        image.state = ol.ImageState.LOADED;
+        var loaded = renderer.loadImage(image);
+        expect(loaded).to.be(true);
+      });
+
+      it('does not register a listener', function() {
+        image.state = ol.ImageState.LOADED;
+        var loaded = renderer.loadImage(image);
+        expect(loaded).to.be(true);
+      });
+
+    });
+
+    describe('load LOADING image', function() {
+
+      beforeEach(function() {
+        renderer.loadImage(image);
+        expect(image.getState()).to.be(ol.ImageState.LOADING);
+      });
+
+      it('returns false', function() {
+        var loaded = renderer.loadImage(image);
+        expect(loaded).to.be(false);
+      });
+
+      it('does not register a new listener', function() {
+        renderer.loadImage(image);
+        var listeners = image.getListeners(eventType, false);
+        expect(listeners).to.have.length(1);
+      });
+
+    });
+
+  });
+});
+
+goog.require('goog.events.EventType');
+goog.require('ol.Image');
+goog.require('ol.ImageState');
+goog.require('ol.Map');
+goog.require('ol.layer.Layer');
+goog.require('ol.renderer.Layer');