test: harden visual resource rendering

tests/content-model.test.ts

@@ -121,6 +121,75 @@ describe('OneNote rich-content model', () => {
     ).toBeUndefined();
   });
 
+  it('retains an embedded-file node as a downloadable lazy resource', () => {
+    const guid = '{22222222-2222-2222-2222-222222222222}';
+    const attachmentId = id(guid, 1);
+    const containerId = id(guid, 2);
+    const payload = Uint8Array.of(1, 2, 3, 4);
+    const attachment = object(
+      attachmentId,
+      JCID.EmbeddedFileNode,
+      {
+        ...emptyProps(),
+        objectIds: [compact(2)],
+        properties: {
+          entries: [
+            referenceEntry(PROPERTY.EmbeddedFileContainer, 'one'),
+            bytesEntry(
+              PROPERTY.EmbeddedFileName,
+              Buffer.from('report.txt', 'utf16le')
+            ),
+          ],
+        },
+      },
+      guid
+    );
+    const container = object(
+      containerId,
+      JCID.EmbeddedFileContainer,
+      emptyProps(),
+      guid
+    );
+    container.fileData = {
+      referenceKind: 'embedded',
+      dataReference: '<ifndf>{22222222-2222-2222-2222-222222222222}',
+      extension: '.txt',
+      blob: { source: payload, offset: 0, size: payload.length },
+    };
+    const resources = new Map();
+    const space: ObjectSpace = {
+      id: id(guid, 0),
+      roots: new Map(),
+      objects: new Map([
+        [exGuidKey(attachment.id), attachment],
+        [exGuidKey(container.id), container],
+      ]),
+    };
+
+    const blocks = parseContentObjects([attachmentId], {
+      space,
+      limits: { ...DEFAULT_ONENOTE_PARSER_LIMITS },
+      diagnostics: [],
+      resources,
+    });
+
+    expect(blocks).toEqual([
+      expect.objectContaining({
+        kind: 'attachment',
+        filename: 'report.txt',
+        size: 4,
+        resourceId: exGuidKey(containerId),
+      }),
+    ]);
+    expect(resources.get(exGuidKey(containerId))).toMatchObject({
+      kind: 'attachment',
+      extension: 'txt',
+      mediaType: 'text/plain',
+      availability: 'available',
+      size: 4,
+    });
+  });
+
   it('bounds aggregate ink point expansion', () => {
     const model = parseOneNoteSectionContent(fixture, {
       limits: { maxInkPoints: 100 },