fix: doesn't call Object.entries on undefined (#484)

Co-authored-by: Willie Ruemmele <[email protected]>

Author: mshanemc

src/convert/transformers/decomposedMetadataTransformer.ts

@@ -144,7 +144,8 @@ export class DecomposedMetadataTransformer extends BaseMetadataTransformer {
     component: SourceComponent
   ): Promise<Array<[string, { fullname?: string; name?: string }]>> {
     const composedMetadata = (await component.parseXml())[component.type.name];
-    return Object.entries(composedMetadata);
+    // composedMetadata might be undefined if you call toSourceFormat() from a non-source-backed Component
+    return composedMetadata ? Object.entries(composedMetadata) : [];
   }
 
   /**

test/convert/transformers/decomposedMetadataTransformer.ts

@@ -278,6 +278,15 @@ describe('DecomposedMetadataTransformer', () => {
       ]);
     });
 
+    it('should handle decomposed parents with no files', async () => {
+      const transformer = new DecomposedMetadataTransformer(mockRegistry);
+      env.stub(component, 'parseXml').resolves({});
+
+      const result = await transformer.toSourceFormat(component);
+
+      expect(result).to.deep.equal([]);
+    });
+
     describe('Merging Components', () => {
       it('should merge output with merge component that only has children', async () => {
         const mergeComponentChild = component.getChildren()[0];