testing bug fix

testing example 07 bug fix

Author: Varun Nair

tests/test_ex07.py

@@ -0,0 +1,26 @@
+import nbformat
+from nbclient import NotebookClient
+import os
+import pytest
+
+def test_example07_first_cell_runs():
+    notebook_path = os.path.abspath(os.path.join(os.path.dirname(__file__), '../examples/example_07/analysis.ipynb'))
+
+    with open(notebook_path, "r", encoding="utf-8") as f:
+        nb = nbformat.read(f, as_version=4)
+
+    # Filter just the first code cell
+    first_code_cell = next((cell for cell in nb.cells if cell.cell_type == "code"), None)
+
+    if not first_code_cell:
+        pytest.fail("No code cell found in example07.ipynb")
+
+    # Create a minimal notebook with only the first cell
+    nb_single = nbformat.v4.new_notebook()
+    nb_single.cells = [first_code_cell]
+
+    try:
+        client = NotebookClient(nb_single, timeout=60, kernel_name="pyiron")
+        client.execute()
+    except Exception as e:
+        pytest.fail(f"First code cell in example07.analysis.ipynb failed: {e}")