46 lines
1.6 KiB
Python
46 lines
1.6 KiB
Python
"""Tests for making sure experimental imports work as expected."""
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import textwrap
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from sklearn.utils._testing import assert_run_python_script
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def test_imports_strategies():
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# Make sure different import strategies work or fail as expected.
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# Since Python caches the imported modules, we need to run a child process
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# for every test case. Else, the tests would not be independent
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# (manually removing the imports from the cache (sys.modules) is not
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# recommended and can lead to many complications).
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good_import = """
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from sklearn.experimental import enable_hist_gradient_boosting
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from sklearn.ensemble import GradientBoostingClassifier
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from sklearn.ensemble import GradientBoostingRegressor
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"""
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assert_run_python_script(textwrap.dedent(good_import))
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good_import_with_ensemble_first = """
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import sklearn.ensemble
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from sklearn.experimental import enable_hist_gradient_boosting
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from sklearn.ensemble import GradientBoostingClassifier
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from sklearn.ensemble import GradientBoostingRegressor
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"""
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assert_run_python_script(textwrap.dedent(good_import_with_ensemble_first))
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bad_imports = """
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import pytest
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with pytest.raises(ImportError):
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from sklearn.ensemble import HistGradientBoostingClassifier
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with pytest.raises(ImportError):
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from sklearn.ensemble._hist_gradient_boosting import (
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HistGradientBoostingClassifier)
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import sklearn.experimental
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with pytest.raises(ImportError):
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from sklearn.ensemble import HistGradientBoostingClassifier
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"""
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assert_run_python_script(textwrap.dedent(bad_imports))
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