Organize tests

test/browser/spec/ol/style/stroke.test.js

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+import Stroke from '../../../../../src/ol/style/Stroke.js';
+
+describe('ol.style.Stroke', function () {
+  describe('#clone', function () {
+    it('creates a new ol.style.Stroke', function () {
+      const original = new Stroke();
+      const clone = original.clone();
+      expect(clone).to.be.an(Stroke);
+      expect(clone).to.not.be(original);
+    });
+
+    it('copies all values', function () {
+      const original = new Stroke({
+        color: '#319FD3',
+        lineCap: 'square',
+        lineJoin: 'miter',
+        lineDash: [1, 2, 3],
+        lineDashOffset: 2,
+        miterLimit: 20,
+        width: 5,
+      });
+      const clone = original.clone();
+      expect(original.getColor()).to.eql(clone.getColor());
+      expect(original.getLineCap()).to.eql(clone.getLineCap());
+      expect(original.getLineJoin()).to.eql(clone.getLineJoin());
+      expect(original.getLineDash()).to.eql(clone.getLineDash());
+      expect(original.getLineDashOffset()).to.eql(clone.getLineDashOffset());
+      expect(original.getMiterLimit()).to.eql(clone.getMiterLimit());
+      expect(original.getWidth()).to.eql(clone.getWidth());
+    });
+
+    it('the clone does not reference the same objects as the original', function () {
+      const original = new Stroke({
+        color: [1, 2, 3, 0.4],
+        lineDash: [1, 2, 3],
+      });
+      const clone = original.clone();
+      expect(original.getColor()).to.not.be(clone.getColor());
+      expect(original.getLineDash()).to.not.be(clone.getLineDash());
+
+      clone.getColor()[0] = 0;
+      clone.getLineDash()[0] = 0;
+      expect(original.getColor()).to.not.eql(clone.getColor());
+      expect(original.getLineDash()).to.not.eql(clone.getLineDash());
+    });
+  });
+});