Refactor prepare time metrics function

Moves the function to a separate utility and
adds some specs

ee/app/assets/javascripts/analytics/cycle_analytics/components/time_metrics_card.vue

@@ -2,9 +2,8 @@
 import Api from 'ee/api';
 import { __, s__ } from '~/locale';
 import createFlash from '~/flash';
-import { slugify } from '~/lib/utils/text_utility';
 import MetricCard from '../../shared/components/metric_card.vue';
-import { removeFlash } from '../utils';
+import { removeFlash, prepareTimeMetricsData } from '../utils';
 
 const I18N_TEXT = {
   'lead-time': s__('ValueStreamAnalytics|Median time from issue created to issue closed.'),
@@ -47,15 +46,7 @@ export default {
       this.loading = true;
       return Api.cycleAnalyticsTimeSummaryData(this.groupPath, this.additionalParams)
         .then(({ data }) => {
-          this.data = data.map(({ title: label, ...rest }) => {
-            const key = slugify(label);
-            return {
-              ...rest,
-              label,
-              key,
-              tooltipText: I18N_TEXT[key] || '',
-            };
-          });
+          this.data = prepareTimeMetricsData(data, I18N_TEXT);
         })
         .catch(() => {
           createFlash(

ee/app/assets/javascripts/analytics/cycle_analytics/utils.js

@@ -3,7 +3,7 @@ import dateFormat from 'dateformat';
 import { s__, sprintf } from '~/locale';
 import { convertObjectPropsToCamelCase } from '~/lib/utils/common_utils';
 import httpStatus from '~/lib/utils/http_status';
-import { convertToSnakeCase } from '~/lib/utils/text_utility';
+import { convertToSnakeCase, slugify } from '~/lib/utils/text_utility';
 import { hideFlash } from '~/flash';
 import {
   newDate,
@@ -378,3 +378,14 @@ export const transformStagesForPathNavigation = ({ stages, medians, selectedStag
     stage.title === CAPITALIZED_STAGE_NAME.OVERVIEW ? 0 : 1,
   );
 };
+
+export const prepareTimeMetricsData = (data = [], tooltipText = {}) =>
+  data.map(({ title: label, ...rest }) => {
+    const key = slugify(label);
+    return {
+      ...rest,
+      label,
+      key,
+      tooltipText: tooltipText[key] || '',
+    };
+  });