Add test to check if NULL category count values properly

test/acceptance/dataviews/aggregation.js

@@ -13,8 +13,11 @@ describe('aggregations', function() {
         }
     });
 
-    function aggregationOperationMapConfig(operation) {
+    function aggregationOperationMapConfig(operation, column, aggregationColumn) {
-        return {
+        column = column || 'adm0name';
+        aggregationColumn = aggregationColumn || 'pop_max';
+
+        var mapConfig = {
             version: '1.5.0',
             layers: [
                 {
@@ -23,20 +26,22 @@ describe('aggregations', function() {
                         sql: 'select * from populated_places_simple_reduced',
                         cartocss: '#layer0 { marker-fill: red; marker-width: 10; }',
                         cartocss_version: '2.0.1',
-                        widgets: {
+                        widgets: {}
-                            adm0name: {
-                                type: 'aggregation',
-                                options: {
-                                    column: 'adm0name',
-                                    aggregation: operation,
-                                    aggregationColumn: 'pop_max'
-                                }
-                            }
-                        }
                     }
                 }
             ]
         };
+
+        mapConfig.layers[0].options.widgets[column] = {
+            type: 'aggregation',
+            options: {
+                column: column,
+                aggregation: operation,
+                aggregationColumn: aggregationColumn
+            }
+        };
+
+        return mapConfig;
     }
 
     var operations = ['count', 'sum', 'avg', 'max', 'min'];
@@ -56,4 +61,26 @@ describe('aggregations', function() {
             });
         });
     });
+
+    it('should count NULL category', function (done) {
+        this.testClient = new TestClient(aggregationOperationMapConfig('count', 'namepar'));
+        this.testClient.getDataview('namepar', { own_filter: 0 }, function (err, aggregation) {
+            assert.ifError(err);
+
+            assert.ok(aggregation);
+            assert.equal(aggregation.type, 'aggregation');
+            assert.ok(aggregation.categories);
+
+            var hasNullCategory = false;
+            aggregation.categories.forEach(function (category) {
+                if (category.category === null) {
+                    assert.ok(category.value > 0);
+                    hasNullCategory = true;
+                }
+            });
+            assert.ok(hasNullCategory, 'there is no category NULL');
+
+            done();
+        });
+    });
 });