build(docs-infra): include inherited members in search index (#26676)

Closes #23800

PR Close #26676

aio/tools/transforms/angular-base-package/processors/generateKeywords.js

@@ -164,10 +164,18 @@ function extractWords(text, words, keywordMap) {
 }
 
 function extractMemberWords(doc, members, membersMap) {
+  if (!doc) return;
+
   if (doc.members) {
-    doc.members.forEach(function(member) { extractWords(member.name, members, membersMap); });
+    doc.members.forEach(member => extractWords(member.name, members, membersMap));
   }
   if (doc.statics) {
-    doc.statics.forEach(function(member) { extractWords(member.name, members, membersMap); });
+    doc.statics.forEach(member => extractWords(member.name, members, membersMap));
+  }
+  if (doc.extendsClauses) {
+    doc.extendsClauses.forEach(clause => extractMemberWords(clause.doc, members, membersMap));
+  }
+  if (doc.implementsClauses) {
+    doc.implementsClauses.forEach(clause => extractMemberWords(clause.doc, members, membersMap));
   }
 }

aio/tools/transforms/angular-base-package/processors/generateKeywords.spec.js

@@ -128,6 +128,46 @@ describe('generateKeywords processor', () => {
     );
   });
 
+  it('should add inherited member doc properties to the search terms', () => {
+    const processor = processorFactory(mockLogger, mockReadFilesProcessor);
+    const parentClass =       {
+      docType: 'class',
+      name: 'ParentClass',
+      members: [
+        { name: 'parentMember1' },
+      ],
+      statics: [
+        { name: 'parentMember2' },
+      ],
+    };
+    const parentInterface = {
+      docType: 'interface',
+      name: 'ParentInterface',
+      members: [
+        { name: 'parentMember3' },
+      ]
+    };
+
+    const childClass = {
+      docType: 'class',
+      name: 'Child',
+      members: [
+        { name: 'childMember1' }
+      ],
+      statics: [
+        { name: 'childMember2' }
+      ],
+      extendsClauses: [{ doc: parentClass }],
+      implementsClauses: [{ doc: parentInterface }]
+    };
+    const docs = [childClass, parentClass, parentInterface];
+    processor.$process(docs);
+    const keywordsDoc = docs[docs.length - 1];
+    expect(keywordsDoc.data[0].members.split(' ').sort().join(' ')).toEqual(
+      'childmember1 childmember2 parentmember1 parentmember2 parentmember3'
+    );
+  });
+
   it('should process terms prefixed with "ng" to include the term stripped of "ng"', () => {
     const processor = processorFactory(mockLogger, mockReadFilesProcessor);
     const docs = [