extractTechnologyProps skips empty languages (#938)

Author: marinaaisa

src/utils/navigatorData.js

@@ -217,8 +217,9 @@ export function flattenNavigationIndex(languages) {
  * Extract technology data for each language variant
  */
 export function extractTechnologyProps(indexData) {
-  return Object.entries(indexData).reduce((acc, [language, data]) => {
-    const topLevelNode = extractRootNode(data);
+  return Object.entries(indexData).reduce((acc, [language, langData]) => {
+    if (!langData.length) return acc;
+    const topLevelNode = extractRootNode(langData);
     acc[language] = {
       technology: topLevelNode.title,
       technologyPath: topLevelNode.path || topLevelNode.url,

tests/unit/utils/navigatorData.spec.js

@@ -429,5 +429,10 @@ describe('when multiple top-level children are provided', () => {
       props = extractTechnologyProps({ swift: [c, a] });
       expect(props.swift.technology).toBe(c.title);
     });
+
+    it('skips empty languages', () => {
+      const props = extractTechnologyProps({ occ: [], swift: [a] });
+      expect(props.swift.technology).toBe(a.title);
+    });
   });
 });