Replaces clip.test.js with new tests

Transforms the old rendering test for
layer clipping to the new rendering test approach.

rendering/cases/layer-clipping/main.js

@@ -0,0 +1,61 @@
+import Map from '../../../src/ol/Map.js';
+import View from '../../../src/ol/View.js';
+import XYZ from '../../../src/ol/source/XYZ.js';
+import TileLayer from '../../../src/ol/layer/Tile.js';
+import MultiPolygon from '../../../src/ol/geom/MultiPolygon.js';
+import Style from '../../../src/ol/style/Style.js';
+import Stroke from '../../../src/ol/style/Stroke.js';
+import {getVectorContext} from '../../../src/ol/render.js';
+
+const source = new XYZ({
+  url: '/data/tiles/osm/{z}/{x}/{y}.png',
+  transition: 0
+});
+
+const layer = new TileLayer({
+  source: source
+});
+
+const geometry = new MultiPolygon([
+  [[[-80, -40], [-40, 0], [-80, 40], [-120, 0], [-80, -40]]],
+  [[[80, -40], [120, 0], [80, 40], [40, 0], [80, -40]]]
+]).transform('EPSG:4326', 'EPSG:3857');
+
+const style = new Style({
+  stroke: new Stroke({
+    width: 2,
+    color: 'blue'
+  })
+});
+
+layer.on('prerender', function(event) {
+  const context = event.context;
+  context.save();
+
+  const vectorContext = getVectorContext(event);
+  vectorContext.setStyle(style);
+  vectorContext.drawGeometry(geometry);
+
+  context.clip();
+});
+
+layer.on('postrender', function(event) {
+  const context = event.context;
+  context.restore();
+
+  const vectorContext = getVectorContext(event);
+  vectorContext.setStyle(style);
+  vectorContext.drawGeometry(geometry);
+});
+
+new Map({
+  pixelRatio: 1,
+  target: 'map',
+  layers: [layer],
+  view: new View({
+    center: [0, 0],
+    zoom: 0
+  })
+});
+
+render();

test/rendering/ol/layer/clip.test.js

@@ -1,110 +0,0 @@
-import Map from '../../../../src/ol/Map.js';
-import View from '../../../../src/ol/View.js';
-import MultiPolygon from '../../../../src/ol/geom/MultiPolygon.js';
-import TileLayer from '../../../../src/ol/layer/Tile.js';
-import XYZ from '../../../../src/ol/source/XYZ.js';
-import Stroke from '../../../../src/ol/style/Stroke.js';
-import Style from '../../../../src/ol/style/Style.js';
-
-
-describe('layer clipping', function() {
-
-  function onLoad(source, callback) {
-    let loading = 0;
-    let loaded = 0;
-    let called = false;
-
-    function check() {
-      if (!called && loading > 0 && loaded === loading) {
-        callback();
-      }
-    }
-
-    source.on('tileloadstart', function() {
-      ++loading;
-    });
-    source.on('tileloadend', function() {
-      ++loaded;
-      setTimeout(check, 10);
-    });
-    source.on('tileloaderror', function() {
-      callback(new Error('Tile loading failed'));
-      called = true;
-    });
-  }
-
-
-  describe('MultiPolygon clipping', function() {
-
-    let map = null;
-    beforeEach(function() {
-      map = new Map({
-        pixelRatio: 1,
-        target: createMapDiv(256, 256),
-        view: new View({
-          center: [0, 0],
-          zoom: 0
-        })
-      });
-    });
-
-    afterEach(function() {
-      disposeMap(map);
-      map = null;
-    });
-
-    it('clips to all parts of the MultiPolygon', function(done) {
-
-      const source = new XYZ({
-        url: 'rendering/ol/data/tiles/osm/{z}/{x}/{y}.png',
-        transition: 0
-      });
-
-      const layer = new TileLayer({
-        source: source
-      });
-
-      const geometry = new MultiPolygon([
-        [[[-80, -40], [-40, 0], [-80, 40], [-120, 0], [-80, -40]]],
-        [[[80, -40], [120, 0], [80, 40], [40, 0], [80, -40]]]
-      ]).transform('EPSG:4326', 'EPSG:3857');
-
-      const style = new Style({
-        stroke: new Stroke({
-          width: 2,
-          color: 'blue'
-        })
-      });
-
-      layer.on('precompose', function(event) {
-        const context = event.context;
-        context.save();
-
-        const vectorContext = event.vectorContext;
-        vectorContext.setStyle(style);
-        vectorContext.drawGeometry(geometry);
-
-        context.clip();
-      });
-
-      layer.on('postcompose', function(event) {
-        const context = event.context;
-        context.restore();
-
-        const vectorContext = event.vectorContext;
-        vectorContext.setStyle(style);
-        vectorContext.drawGeometry(geometry);
-      });
-
-      onLoad(source, function(err) {
-        if (err) {
-          return done(err);
-        }
-        expectResemble(map, 'rendering/ol/layer/expected/multipolygon-clip.png', IMAGE_TOLERANCE, done);
-      });
-
-      map.addLayer(layer);
-
-    });
-  });
-});