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122 lines
3.7 KiB
Python
122 lines
3.7 KiB
Python
"""
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Tests which scan for certain occurrences in the code, they may not find
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all of these occurrences but should catch almost all. This file was adapted
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from NumPy.
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"""
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import os
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from pathlib import Path
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import ast
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import tokenize
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import scipy
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import pytest
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class ParseCall(ast.NodeVisitor):
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def __init__(self):
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self.ls = []
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def visit_Attribute(self, node):
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ast.NodeVisitor.generic_visit(self, node)
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self.ls.append(node.attr)
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def visit_Name(self, node):
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self.ls.append(node.id)
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class FindFuncs(ast.NodeVisitor):
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def __init__(self, filename):
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super().__init__()
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self.__filename = filename
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self.bad_filters = []
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self.bad_stacklevels = []
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def visit_Call(self, node):
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p = ParseCall()
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p.visit(node.func)
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ast.NodeVisitor.generic_visit(self, node)
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if p.ls[-1] == 'simplefilter' or p.ls[-1] == 'filterwarnings':
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if node.args[0].s == "ignore":
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self.bad_filters.append(
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"{}:{}".format(self.__filename, node.lineno))
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if p.ls[-1] == 'warn' and (
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len(p.ls) == 1 or p.ls[-2] == 'warnings'):
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if self.__filename == "_lib/tests/test_warnings.py":
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# This file
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return
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# See if stacklevel exists:
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if len(node.args) == 3:
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return
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args = {kw.arg for kw in node.keywords}
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if "stacklevel" not in args:
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self.bad_stacklevels.append(
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"{}:{}".format(self.__filename, node.lineno))
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@pytest.fixture(scope="session")
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def warning_calls():
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# combined "ignore" and stacklevel error
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base = Path(scipy.__file__).parent
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bad_filters = []
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bad_stacklevels = []
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for path in base.rglob("*.py"):
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# use tokenize to auto-detect encoding on systems where no
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# default encoding is defined (e.g., LANG='C')
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with tokenize.open(str(path)) as file:
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tree = ast.parse(file.read(), filename=str(path))
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finder = FindFuncs(path.relative_to(base))
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finder.visit(tree)
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bad_filters.extend(finder.bad_filters)
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bad_stacklevels.extend(finder.bad_stacklevels)
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return bad_filters, bad_stacklevels
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@pytest.mark.slow
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def test_warning_calls_filters(warning_calls):
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bad_filters, bad_stacklevels = warning_calls
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# There is still one simplefilter occurrence in optimize.py that could be removed.
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bad_filters = [item for item in bad_filters
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if 'optimize.py' not in item]
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# The filterwarnings calls in sparse are needed.
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bad_filters = [item for item in bad_filters
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if os.path.join('sparse', '__init__.py') not in item
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and os.path.join('sparse', 'sputils.py') not in item]
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if bad_filters:
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raise AssertionError(
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"warning ignore filter should not be used, instead, use\n"
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"numpy.testing.suppress_warnings (in tests only);\n"
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"found in:\n {}".format(
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"\n ".join(bad_filters)))
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@pytest.mark.slow
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@pytest.mark.xfail(reason="stacklevels currently missing")
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def test_warning_calls_stacklevels(warning_calls):
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bad_filters, bad_stacklevels = warning_calls
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msg = ""
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if bad_filters:
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msg += ("warning ignore filter should not be used, instead, use\n"
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"numpy.testing.suppress_warnings (in tests only);\n"
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"found in:\n {}".format("\n ".join(bad_filters)))
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msg += "\n\n"
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if bad_stacklevels:
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msg += "warnings should have an appropriate stacklevel:\n {}".format(
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"\n ".join(bad_stacklevels))
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if msg:
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raise AssertionError(msg)
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