Use view projection tile grid in tile loadingstrategy

test/browser/spec/ol/loadingstrategy.test.js

@@ -0,0 +1,38 @@
+import {approximatelyEquals} from '../../../../src/ol/extent.js';
+import {
+  clearUserProjection,
+  get,
+  toUserExtent,
+  toUserResolution,
+  transformExtent,
+  useGeographic,
+} from '../../../../src/ol/proj.js';
+import {createXYZ} from '../../../../src/ol/tilegrid.js';
+import {tile} from '../../../../src/ol/loadingstrategy.js';
+
+describe('ol/loadingstrategy', function () {
+  describe('tile', function () {
+    afterEach(function () {
+      clearUserProjection();
+    });
+    it('uses a tile grid in view projection', function () {
+      useGeographic();
+      const tileGrid = createXYZ();
+      const strategy = tile(tileGrid);
+      const extent = tileGrid.getTileCoordExtent([1, 1, 1]);
+      const userExtent = toUserExtent(extent, get('EPSG:3857'));
+      const userResolution = toUserResolution(
+        tileGrid.getResolution(1),
+        get('EPSG:3857')
+      );
+      const extents = strategy(userExtent, userResolution, get('EPSG:3857'));
+      expect(
+        approximatelyEquals(
+          transformExtent(extents[0], 'EPSG:4326', 'EPSG:3857'),
+          extent,
+          1e-8
+        )
+      ).to.be(true);
+    });
+  });
+});