Improve overview map handling of map and view changes

test/spec/ol/control/overviewmapcontrol.test.js

@@ -0,0 +1,92 @@
+goog.provide('ol.test.control.OverviewMap');
+
+describe('ol.control.OverviewMap', function() {
+  var map, target;
+
+  beforeEach(function() {
+    target = document.createElement('div');
+    document.body.appendChild(target);
+    map = new ol.Map({
+      target: target
+    });
+  });
+
+  afterEach(function() {
+    goog.dispose(map);
+    document.body.removeChild(target);
+    map = null;
+    target = null;
+  });
+
+  describe('constructor', function() {
+    it('creates an overview map with the default options', function() {
+      var control = new ol.control.OverviewMap();
+      expect(control).to.be.a(ol.control.OverviewMap);
+      expect(control).to.be.a(ol.control.Control);
+    });
+  });
+
+  describe('setMap()', function() {
+
+    it('keeps ovmap view rotation in sync with map view rotation', function() {
+      var view = new ol.View({
+        center: [0, 0],
+        zoom: 0,
+        rotation: 0
+      });
+      map.setView(view);
+
+      var control = new ol.control.OverviewMap();
+      map.addControl(control);
+      var ovView = control.ovmap_.getView();
+      expect(ovView.getRotation()).to.be(0);
+
+      view.setRotation(Math.PI / 4);
+      expect(ovView.getRotation()).to.be(Math.PI / 4);
+    });
+
+    it('maintains rotation in sync if view added later', function() {
+      var control = new ol.control.OverviewMap();
+      map.addControl(control);
+      var ovView = control.ovmap_.getView();
+      expect(ovView.getRotation()).to.be(0);
+
+      var view = new ol.View({
+        center: [0, 0],
+        zoom: 0,
+        rotation: 0
+      });
+      map.setView(view);
+      view.setRotation(Math.PI / 4);
+      expect(ovView.getRotation()).to.be(Math.PI / 4);
+    });
+
+    it('stops listening to old maps', function() {
+      var control = new ol.control.OverviewMap();
+      var ovView = control.ovmap_.getView();
+
+      var view = new ol.View({
+        center: [0, 0],
+        zoom: 0,
+        rotation: 0
+      });
+      map.setView(view);
+      map.addControl(control);
+
+      view.setRotation(Math.PI / 8);
+      expect(ovView.getRotation()).to.be(Math.PI / 8);
+
+      map.removeControl(control);
+
+      view.setRotation(Math.PI / 4);
+      expect(ovView.getRotation()).to.be(Math.PI / 8);
+    });
+
+  });
+
+});
+
+goog.require('ol.Map');
+goog.require('ol.View');
+goog.require('ol.control.Control');
+goog.require('ol.control.OverviewMap');