test: add aggregated dataset to testing ldm

risk: nonprod

Author: fiedlr

tests-support/fixtures/demo_declarative_hierarchy.json

@@ -2346,6 +2346,69 @@
               ],
               "title": "Campaign channels"
             },
+            {
+              "attributes": [
+                {
+                  "description": "Category",
+                  "id": "campaign_channels.category",
+                  "sourceColumn": "category",
+                  "sourceColumnDataType": "STRING",
+                  "labels": [],
+                  "tags": [
+                    "Campaign channels"
+                  ],
+                  "title": "Category"
+                }
+              ],
+              "description": "Campaign channels per categories",
+              "facts": [],
+              "aggregatedFacts": [
+                {
+                  "description": "Budget",
+                  "id": "budget",
+                  "sourceColumn": "budget",
+                  "sourceColumnDataType": "INT",
+                  "tags": [
+                    "Campaign channels per category"
+                  ],
+                  "sourceFactReference":{
+                    "reference": {
+                      "id": "budget",
+                      "type": "fact"
+                    },
+                    "operation": "SUM"
+                  }
+                }
+              ],
+              "grain": [
+                {
+                  "id": "campaign_channels.category",
+                  "type": "attribute"
+                }
+              ],
+              "id": "campaign_channels_per_category",
+              "references": [
+                {
+                  "identifier": {
+                    "id": "campaign_channels",
+                    "type": "dataset"
+                  },
+                  "multivalue": false,
+                  "sourceColumns": [
+                    "campaign_channel_category"
+                  ],
+                  "sourceColumnDataTypes": [ "STRING" ]
+                }
+              ],
+              "tags": [
+                "Campaign channels per category"
+              ],
+              "sql": {
+                "statement": "SELECT category, SUM(budget) FROM campaign_channels GROUP BY category",
+                "dataSourceId": "demo-test-ds"
+              },
+              "title": "Campaign channels per category"
+            },
             {
               "attributes": [
                 {