17 lines
426 B
Python
17 lines
426 B
Python
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from sympy.external import import_module
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from sympy.testing.pytest import ignore_warnings, raises
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antlr4 = import_module("antlr4", warn_not_installed=False)
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# disable tests if antlr4-python3-runtime is not present
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if antlr4:
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disabled = True
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def test_no_import():
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from sympy.parsing.latex import parse_latex
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with ignore_warnings(UserWarning):
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with raises(ImportError):
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parse_latex('1 + 1')
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