Fixes spec failures due to not returning metrics for MRs other than closed/merged

app/assets/javascripts/vue_merge_request_widget/stores/mr_widget_store.js

@@ -125,6 +125,10 @@ export default class MergeRequestStore {
   }
 
   static buildMetrics(metrics) {
+    if (!metrics) {
+      return {};
+    }
+
     return {
       mergedBy: MergeRequestStore.formatUserObject(metrics.merged_by),
       closedBy: MergeRequestStore.formatUserObject(metrics.closed_by),

spec/fixtures/api/schemas/entities/merge_request_widget.json

@@ -32,8 +32,10 @@
     "target_branch": { "type": "string" },
     "target_project_id": { "type": "integer" },
     "metrics": {
-      "type": "object",
-      "$ref": "merge_request_metrics.json"
+      "oneOf": [
+        { "type": "null" },
+        { "$ref": "merge_request_metrics.json" }
+      ]
     },
     "author": { "type": ["object", "null"] },
     "merge_user": { "type": ["object", "null"] },

spec/serializers/merge_request_widget_entity_spec.rb

@@ -72,6 +72,7 @@ describe MergeRequestWidgetEntity do
 
     context 'when metrics does not exists' do
       before do
+        resource.mark_as_merged!
         resource.metrics.destroy!
         resource.reload
       end