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static/leafletCluster/spec/suites/animateOptionSpec.js

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+describe('animate option', function () {
+
+	/**
+	 * Avoid as much as possible creating and destroying objects for each test.
+	 * Instead, try re-using them, except for the ones under test of course.
+	 * PhantomJS does not perform garbage collection for the life of the page,
+	 * i.e. during the entire test process (Karma runs all tests in a single page).
+	 * http://stackoverflow.com/questions/27239708/how-to-get-around-memory-error-with-karma-phantomjs
+	 *
+	 * The `beforeEach` and `afterEach do not seem to cause much issue.
+	 * => they can still be used to initialize some setup between each test.
+	 * Using them keeps a readable spec/index.
+	 *
+	 * But refrain from re-creating div and map every time. Re-use those objects.
+	 */
+
+	/////////////////////////////
+	// SETUP FOR EACH TEST
+	/////////////////////////////
+
+	beforeEach(function () {
+
+		previousTransitionSetting = L.DomUtil.TRANSITION;
+
+	});
+
+	afterEach(function () {
+
+		// Restore previous setting so that next tests are unaffected.
+		L.DomUtil.TRANSITION = previousTransitionSetting;
+
+		if (group instanceof L.MarkerClusterGroup) {
+			group.removeLayers(group.getLayers());
+			map.removeLayer(group);
+		}
+
+		// Throw away group as it can be assigned with different configurations between tests.
+		group = null;
+
+	});
+
+
+	/////////////////////////////
+	// PREPARATION CODE
+	/////////////////////////////
+
+	var div, map, group, previousTransitionSetting;
+
+	div = document.createElement('div');
+	div.style.width = '200px';
+	div.style.height = '200px';
+	document.body.appendChild(div);
+
+	map = L.map(div, { maxZoom: 18 });
+
+	// Corresponds to zoom level 8 for the above div dimensions.
+	map.fitBounds(new L.LatLngBounds([
+		[1, 1],
+		[2, 2]
+	]));
+
+
+	/////////////////////////////
+	// TESTS
+	/////////////////////////////
+
+	it('hooks animated methods version by default', function () {
+
+		// Need to add to map so that we have the top cluster level created.
+		group = L.markerClusterGroup().addTo(map);
+
+		var withAnimation = L.MarkerClusterGroup.prototype._withAnimation;
+
+		// MCG animated methods.
+		expect(group._animationStart).to.be(withAnimation._animationStart);
+		expect(group._animationZoomIn).to.be(withAnimation._animationZoomIn);
+		expect(group._animationZoomOut).to.be(withAnimation._animationZoomOut);
+		expect(group._animationAddLayer).to.be(withAnimation._animationAddLayer);
+
+		// MarkerCluster spiderfy animated methods
+		var cluster = group._topClusterLevel;
+
+		withAnimation = L.MarkerCluster.prototype;
+
+		expect(cluster._animationSpiderfy).to.be(withAnimation._animationSpiderfy);
+		expect(cluster._animationUnspiderfy).to.be(withAnimation._animationUnspiderfy);
+
+	});
+
+	it('hooks non-animated methods version when set to false', function () {
+
+		// Need to add to map so that we have the top cluster level created.
+		group = L.markerClusterGroup({animate: false}).addTo(map);
+
+		var noAnimation = L.MarkerClusterGroup.prototype._noAnimation;
+
+		// MCG non-animated methods.
+		expect(group._animationStart).to.be(noAnimation._animationStart);
+		expect(group._animationZoomIn).to.be(noAnimation._animationZoomIn);
+		expect(group._animationZoomOut).to.be(noAnimation._animationZoomOut);
+		expect(group._animationAddLayer).to.be(noAnimation._animationAddLayer);
+
+		// MarkerCluster spiderfy non-animated methods
+		var cluster = group._topClusterLevel;
+
+		noAnimation = L.MarkerClusterNonAnimated.prototype;
+
+		expect(cluster._animationSpiderfy).to.be(noAnimation._animationSpiderfy);
+		expect(cluster._animationUnspiderfy).to.be(noAnimation._animationUnspiderfy);
+
+	});
+
+	it('always hooks non-animated methods version when L.DomUtil.TRANSITION is false', function () {
+
+		// Fool Leaflet, make it think the browser does not support transitions.
+		L.DomUtil.TRANSITION = false;
+
+		// Need to add to map so that we have the top cluster level created.
+		group = L.markerClusterGroup({animate: true}).addTo(map);
+
+		var noAnimation = L.MarkerClusterGroup.prototype._noAnimation;
+
+		// MCG non-animated methods.
+		expect(group._animationStart).to.be(noAnimation._animationStart);
+		expect(group._animationZoomIn).to.be(noAnimation._animationZoomIn);
+		expect(group._animationZoomOut).to.be(noAnimation._animationZoomOut);
+		expect(group._animationAddLayer).to.be(noAnimation._animationAddLayer);
+
+		// MarkerCluster spiderfy non-animated methods
+		var cluster = group._topClusterLevel;
+
+		noAnimation = L.MarkerClusterNonAnimated.prototype;
+
+		expect(cluster._animationSpiderfy).to.be(noAnimation._animationSpiderfy);
+		expect(cluster._animationUnspiderfy).to.be(noAnimation._animationUnspiderfy);
+
+	});
+
+
+	/////////////////////////////
+	// CLEAN UP CODE
+	/////////////////////////////
+
+	map.remove();
+	document.body.removeChild(div);
+
+});