Address CodeRabbit review comments

- Add assertions to verify createPythonCode is called correctly in code cell tests
- Add assertions to verify createMarkdown is called correctly in markdown cell tests
- Add assertions to verify convertDeepnoteBlockToJupyterCell is called for all notebooks in transform tests
- Verify mock call counts and arguments to strengthen test contracts

Author: devin-ai-integration[bot]

src/__tests__/convert-deepnote-block-to-jupyter-cell.spec.ts

@@ -51,6 +51,12 @@ describe('convertDeepnoteBlockToJupyterCell', () => {
       expect(result.source).toBe('print("hello")');
       expect(result.execution_count).toBeNull();
       expect(result.outputs).toEqual([]);
+
+      const { createPythonCode } = jest.requireMock('@deepnote/blocks');
+      expect(createPythonCode).toHaveBeenCalledTimes(1);
+      expect(createPythonCode).toHaveBeenCalledWith(
+        expect.objectContaining({ id: 'block-1' })
+      );
     });
 
     it('should include execution count if present', () => {
@@ -194,6 +200,12 @@ describe('convertDeepnoteBlockToJupyterCell', () => {
       expect(result.cell_type).toBe('markdown');
       expect(result.metadata).toEqual({});
       expect(result.source).toBe('# Hello');
+
+      const { createMarkdown } = jest.requireMock('@deepnote/blocks');
+      expect(createMarkdown).toHaveBeenCalledTimes(1);
+      expect(createMarkdown).toHaveBeenCalledWith(
+        expect.objectContaining({ id: 'block-7' })
+      );
     });
 
     it('should convert text-cell-h1 to markdown cell', () => {

src/__tests__/transform-deepnote-yaml-to-notebook-content.spec.ts

@@ -151,6 +151,24 @@ describe('transformDeepnoteYamlToNotebookContent', () => {
     expect(result.cells).toHaveLength(1);
     const cells = result.cells as any[];
     expect(cells[0].source).toBe('first_notebook_code');
+
+    const { convertDeepnoteBlockToJupyterCell } = jest.requireMock(
+      '../convert-deepnote-block-to-jupyter-cell'
+    );
+    expect(convertDeepnoteBlockToJupyterCell).toHaveBeenCalledTimes(3);
+    const calls = convertDeepnoteBlockToJupyterCell.mock.calls;
+    expect(calls[0][0]).toMatchObject({
+      id: 'block-1',
+      source: 'first_notebook_code'
+    });
+    expect(calls[1][0]).toMatchObject({
+      id: 'block-2',
+      source: 'second_notebook_code'
+    });
+    expect(calls[2][0]).toMatchObject({
+      id: 'block-1',
+      source: 'first_notebook_code'
+    });
   });
 
   it('should handle empty notebooks gracefully', async () => {