28 lines
702 B
Python
28 lines
702 B
Python
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import subprocess
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import os
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import sys
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import pytest
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@pytest.mark.parametrize("backend", ["webagg", "nbagg"])
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def test_webagg_fallback(backend):
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pytest.importorskip("tornado")
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if backend == "nbagg":
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pytest.importorskip("IPython")
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env = dict(os.environ)
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if os.name != "nt":
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env["DISPLAY"] = ""
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env["MPLBACKEND"] = backend
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test_code = (
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"import os;"
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+ f"assert os.environ['MPLBACKEND'] == '{backend}';"
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+ "import matplotlib.pyplot as plt; "
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+ "print(plt.get_backend());"
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f"assert '{backend}' == plt.get_backend().lower();"
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)
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ret = subprocess.call([sys.executable, "-c", test_code], env=env)
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assert ret == 0
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