Deprecate the imageSmoothing option for sources

test/browser/spec/ol/source/DataTile.test.js

@@ -0,0 +1,54 @@
+import DataTile from '../../../../../src/ol/DataTile.js';
+import DataTileSource from '../../../../../src/ol/source/DataTile.js';
+import TileState from '../../../../../src/ol/TileState.js';
+
+describe('ol/source/DataTile', function () {
+  /** @type {DataTileSource} */
+  let source;
+  beforeEach(function () {
+    const loader = function (z, x, y) {
+      return new Promise((resolve) => {
+        const canvas = document.createElement('canvas');
+        canvas.width = 256;
+        canvas.height = 256;
+        const context = canvas.getContext('2d');
+        // encode tile coordinate in rgb
+        context.fillStyle = `rgb(${z}, ${x % 255}, ${y % 255})`;
+        context.fillRect(0, 0, 256, 256);
+        resolve(context.getImageData(0, 0, 256, 256).data);
+      });
+    };
+    source = new DataTileSource({
+      loader: loader,
+    });
+  });
+
+  describe('#getTile()', function () {
+    it('gets tiles and fires a tileloadend event', function (done) {
+      const tile = source.getTile(3, 2, 1);
+      expect(tile).to.be.a(DataTile);
+      expect(tile.state).to.be(TileState.IDLE);
+
+      source.on('tileloadend', () => {
+        expect(tile.state).to.be(TileState.LOADED);
+        // decode tile coordinate from rgb
+        expect(Array.from(tile.getData().slice(0, 3))).to.eql([3, 2, 1]);
+        done();
+      });
+
+      tile.load();
+    });
+  });
+
+  describe('#getInterpolate()', function () {
+    it('is false by default', function () {
+      const source = new DataTileSource({loader: () => {}});
+      expect(source.getInterpolate()).to.be(false);
+    });
+
+    it('is true if constructed with interpoate: true', function () {
+      const source = new DataTileSource({interpolate: true, loader: () => {}});
+      expect(source.getInterpolate()).to.be(true);
+    });
+  });
+});