File: test_meta.py

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"""Meta-tests for the test suite.

Module for tests that test the test setup itself, and in general
anything that's beyond testing actual library code.

"""

from __future__ import annotations


def test_mpl_backend():
    """Check if the backend is correctly set for testing."""
    # only fail if matplotlib is otherwise available
    try:
        import matplotlib as mpl
    except ImportError:
        return

    assert mpl.get_backend() == 'agg'