name : test_warnings.py """ Tests which scan for certain occurrences in the code, they may not find all of these occurrences but should catch almost all. """ import pytest from pathlib import Path import ast import tokenize import numpy class ParseCall(ast.NodeVisitor): def __init__(self): self.ls = [] def visit_Attribute(self, node): ast.NodeVisitor.generic_visit(self, node) self.ls.append(node.attr) def visit_Name(self, node): self.ls.append(node.id) class FindFuncs(ast.NodeVisitor): def __init__(self, filename): super().__init__() self.__filename = filename def visit_Call(self, node): p = ParseCall() p.visit(node.func) ast.NodeVisitor.generic_visit(self, node) if p.ls[-1] == 'simplefilter' or p.ls[-1] == 'filterwarnings': if node.args[0].s == "ignore": raise AssertionError( "warnings should have an appropriate stacklevel; found in " "{} on line {}".format(self.__filename, node.lineno)) if p.ls[-1] == 'warn' and ( len(p.ls) == 1 or p.ls[-2] == 'warnings'): if "testing/tests/test_warnings.py" == self.__filename: # This file return # See if stacklevel exists: if len(node.args) == 3: return args = {kw.arg for kw in node.keywords} if "stacklevel" in args: return raise AssertionError( "warnings should have an appropriate stacklevel; found in " "{} on line {}".format(self.__filename, node.lineno)) @pytest.mark.slow def test_warning_calls(): # combined "ignore" and stacklevel error base = Path(numpy.__file__).parent for path in base.rglob("*.py"): if base / "testing" in path.parents: continue if path == base / "__init__.py": continue if path == base / "random" / "__init__.py": continue # use tokenize to auto-detect encoding on systems where no # default encoding is defined (e.g. LANG='C') with tokenize.open(str(path)) as file: tree = ast.parse(file.read()) FindFuncs(path).visit(tree)