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- import os
- from pathlib import Path
- from tempfile import TemporaryDirectory
- import pytest
- from matplotlib.testing import subprocess_run_for_testing
- nbformat = pytest.importorskip('nbformat')
- pytest.importorskip('nbconvert')
- pytest.importorskip('ipykernel')
- # From https://blog.thedataincubator.com/2016/06/testing-jupyter-notebooks/
- def test_ipynb():
- nb_path = Path(__file__).parent / 'test_nbagg_01.ipynb'
- with TemporaryDirectory() as tmpdir:
- out_path = Path(tmpdir, "out.ipynb")
- subprocess_run_for_testing(
- ["jupyter", "nbconvert", "--to", "notebook",
- "--execute", "--ExecutePreprocessor.timeout=500",
- "--output", str(out_path), str(nb_path)],
- env={**os.environ, "IPYTHONDIR": tmpdir},
- check=True)
- with out_path.open() as out:
- nb = nbformat.read(out, nbformat.current_nbformat)
- errors = [output for cell in nb.cells for output in cell.get("outputs", [])
- if output.output_type == "error"]
- assert not errors
- import IPython
- if IPython.version_info[:2] >= (8, 24):
- expected_backend = "notebook"
- else:
- # This code can be removed when Python 3.12, the latest version supported by
- # IPython < 8.24, reaches end-of-life in late 2028.
- expected_backend = "nbAgg"
- backend_outputs = nb.cells[2]["outputs"]
- assert backend_outputs[0]["data"]["text/plain"] == f"'{expected_backend}'"
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