Added basic JS tests for OLMapWidget.js

Thanks Trey Hunner for cleaning the initial patch and Tim Graham for
the review.

js_tests/gis/mapwidget.test.js

+/* global module, test, MapWidget */
+/* eslint global-strict: 0, strict: 0 */
+'use strict';
+
+module('gis.OLMapWidget');
+
+test('MapWidget.featureAdded', function(assert) {
+    var options = {id: 'id_point', map_id: 'id_point_map', geom_name: 'Point'};
+    var widget = new MapWidget(options);
+    assert.equal(widget.layers.vector.features.length, 1);
+    assert.equal(
+        widget.layers.vector.features[0].geometry.toString(),
+        'POINT(7.8177 47.397)',
+        'Point addded to vector layer'
+    );
+});
+
+test('MapWidget.map_srid', function(assert) {
+    var options = {id: 'id_point', map_id: 'id_point_map', geom_name: 'Point'};
+    var widget = new MapWidget(options);
+    assert.equal(widget.options.map_srid, 4326, 'SRID 4326');
+});
+
+test('MapWidget.defaultCenter', function(assert) {
+    var options = {id: 'id_point', map_id: 'id_point_map', geom_name: 'Point'};
+    var widget = new MapWidget(options);
+    assert.equal(widget.defaultCenter().toString(), 'lon=0,lat=0', 'Default center at 0, 0');
+    options.default_lat = 47.08;
+    options.default_lon = 6.81;
+    widget = new MapWidget(options);
+    assert.equal(
+        widget.defaultCenter().toString(),
+        'lon=6.81,lat=47.08',
+        'Default center at 6.81, 47.08'
+    );
+});
+
+test('MapWidget.getControls', function(assert) {
+    var options = {id: 'id_point', map_id: 'id_point_map', geom_name: 'Point'};
+    var widget = new MapWidget(options);
+    widget.getControls(widget.layers.vector);
+    assert.equal(widget.controls.length, 3);
+    assert.equal(widget.controls[0].displayClass, 'olControlNavigation', 'Navigation control');
+    assert.equal(widget.controls[1].displayClass, 'olControlDrawFeaturePoint', 'Draw control');
+    assert.equal(widget.controls[2].displayClass, 'olControlModifyFeature', 'Modify control');
+});

js_tests/tests.html

@@ -78,6 +78,15 @@
     <script src='../django/contrib/admin/static/admin/js/prepopulate.js' data-cover></script>
     <script src='../django/contrib/admin/static/admin/js/urlify.js' data-cover></script>
 
+    <div id="id_point_map">
+        <textarea id="id_point" name="point"
+                  class="vSerializedField required" style="display:none;"
+                  rows="10" cols="150">POINT (7.8177 47.397)</textarea>
+    </div>
+    <script src='http://openlayers.org/api/2.13.1/OpenLayers.js'></script>
+    <script src='../django/contrib/gis/static/gis/js/OLMapWidget.js' data-cover></script>
+    <script src='./gis/mapwidget.test.js'></script>
+
     <script>
        if (location.href.match(/(\?|&)gruntReport($|&|=)/)) {
            blanket.options("reporter", "qunit/grunt-reporter.js");

package.json

@@ -2,7 +2,7 @@
   "name": "Django",
   "private": true,
   "scripts": {
-    "pretest": "eslint django/ js_tests/admin/",
+    "pretest": "eslint django/ js_tests/admin/ js_tests/gis/",
     "test": "grunt test --verbose"
   },
   "devDependencies": {