Fix reloading tiles in case of an error with tile.load()

test/browser/spec/ol/tilequeue.test.js

@@ -1,5 +1,6 @@
 import ImageTile from '../../../../src/ol/ImageTile.js';
 import Tile from '../../../../src/ol/Tile.js';
+import TileCache from '../../../../src/ol/TileCache.js';
 import TileQueue from '../../../../src/ol/TileQueue.js';
 import TileState from '../../../../src/ol/TileState.js';
 import {DROP} from '../../../../src/ol/structs/PriorityQueue.js';
@@ -149,7 +150,7 @@ describe('ol.TileQueue', function () {
       expect(tile.hasListener('change')).to.be(false);
     });
 
-    it('error tiles', function () {
+    it('error tiles - with retry', function (done) {
       const tq = new TileQueue(noop, noop);
       const tile = createImageTile(noop);
 
@@ -160,7 +161,47 @@ describe('ol.TileQueue', function () {
 
       tile.setState(TileState.ERROR);
       expect(tq.getTilesLoading()).to.eql(0);
-      expect(tile.hasListener('change')).to.be(false);
+      expect(tile.hasListener('change')).to.be(true);
+
+      tile.setState(TileState.IDLE);
+      setTimeout(() => tile.setState(TileState.LOADING), 100);
+      setTimeout(() => tile.setState(TileState.LOADED), 200);
+      setTimeout(() => {
+        try {
+          expect(tq.getTilesLoading()).to.eql(0);
+          expect(tile.hasListener('change')).to.be(false);
+          done();
+        } catch (e) {
+          done(e);
+        }
+      }, 300);
+    });
+
+    it('error tiles - without retry', function (done) {
+      const tq = new TileQueue(noop, noop);
+      const tile = createImageTile(noop);
+      const tileCache = new TileCache();
+      tileCache.set(tile.getTileCoord().toString(), tile);
+
+      tq.enqueue([tile]);
+      tq.loadMoreTiles(Infinity, Infinity);
+      expect(tq.getTilesLoading()).to.eql(1);
+      expect(tile.getState()).to.eql(1); // LOADING
+
+      tile.setState(TileState.ERROR);
+      expect(tq.getTilesLoading()).to.eql(0);
+      expect(tile.hasListener('change')).to.be(true);
+
+      setTimeout(() => tileCache.clear(), 100);
+      setTimeout(() => {
+        try {
+          expect(tq.getTilesLoading()).to.eql(0);
+          expect(tile.hasListener('change')).to.be(false);
+          done();
+        } catch (e) {
+          done(e);
+        }
+      }, 200);
     });
   });
 });