[WIP] Increasing code-coverage for choropleth feature

src/choroplethFeature.js

@@ -46,15 +46,15 @@ var choroplethFeature = function (arg) {
           ],
           scale: d3.scale.quantize(),
           accessors: {
-                //accessor for ID on geodata feature
+            //accessor for ID on geodata feature
             geoId: function (geoFeature) {
               return geoFeature.properties.GEO_ID;
             },
-                //accessor for ID on scalar element
+            //accessor for ID on scalar element
             scalarId: function (scalarElement) {
               return scalarElement.id;
             },
-                //accessor for value on scalar element
+            //accessor for value on scalar element
             scalarValue: function (scalarElement) {
               return scalarElement.value;
             }

tests/cases/choroplethFeature.js

@@ -0,0 +1,68 @@
+// Test geo.choroplethFeature and geo.gl.choroplethFeature
+
+var geo = require('../test-utils').geo;
+var $ = require('jquery');
+var mockVGLRenderer = require('../test-utils').mockVGLRenderer;
+var restoreVGLRenderer = require('../test-utils').restoreVGLRenderer;
+
+describe('geo.choroplethFeature', function () {
+  'use strict';
+
+  function create_map(opts) {
+    var node = $('<div id="map"/>').css({width: '640px', height: '360px'});
+    $('#map').remove();
+    $('body').append(node);
+    opts = $.extend({}, opts);
+    opts.node = node;
+    return geo.map(opts);
+  }
+
+  var mpdata = [{
+    'type': 'Feature',
+    'geometry': {
+      'type': 'MultiPolygon',
+      'coordinates': [
+        [
+          [
+            [101.2, 1.2], [101.8, 1.2], [101.8, 1.8], [101.2, 1.8], [101.2, 1.2]
+          ],
+        ],
+        [
+          [
+            [100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0]
+          ],
+        ]
+      ]
+    },
+    'properties': {
+      'GEO_ID': 0
+    }
+  }];
+
+  describe('create', function () {
+    it('create function', function () {
+      mockVGLRenderer();
+      var map, layer, choropleth;
+      map = create_map();
+      layer = map.createLayer('feature', {renderer: 'vgl'});
+      choropleth = layer.createFeature('choropleth');
+      expect(choropleth instanceof geo.choroplethFeature).toBe(true);
+      restoreVGLRenderer();
+    });
+
+    it('multipolygon', function () {
+      mockVGLRenderer();
+      var map, layer, choropleth,
+          scalarValues = [{'id': 0, 'value': 10}];
+
+      map = create_map();
+      layer = map.createLayer('feature', {renderer: 'vgl'});
+      choropleth = layer.createFeature('choropleth')
+                     .data(mpdata)
+                     .scalar(scalarValues)
+                     .choropleth({});
+      expect(choropleth instanceof geo.choroplethFeature).toBe(true);
+      restoreVGLRenderer();
+    });
+  });
+});