122 lines
3.7 KiB
Python
122 lines
3.7 KiB
Python
import os
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import six
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import sys
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import platform
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import traceback
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from ..outcomes import fail, TEST_OUTCOME
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def cached_eval(config, expr, d):
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if not hasattr(config, "_evalcache"):
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config._evalcache = {}
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try:
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return config._evalcache[expr]
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except KeyError:
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import _pytest._code
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exprcode = _pytest._code.compile(expr, mode="eval")
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config._evalcache[expr] = x = eval(exprcode, d)
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return x
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class MarkEvaluator(object):
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def __init__(self, item, name):
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self.item = item
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self._marks = None
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self._mark = None
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self._mark_name = name
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def __bool__(self):
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# dont cache here to prevent staleness
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return bool(self._get_marks())
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__nonzero__ = __bool__
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def wasvalid(self):
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return not hasattr(self, "exc")
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def _get_marks(self):
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return list(self.item.iter_markers(name=self._mark_name))
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def invalidraise(self, exc):
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raises = self.get("raises")
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if not raises:
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return
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return not isinstance(exc, raises)
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def istrue(self):
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try:
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return self._istrue()
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except TEST_OUTCOME:
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self.exc = sys.exc_info()
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if isinstance(self.exc[1], SyntaxError):
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msg = [" " * (self.exc[1].offset + 4) + "^"]
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msg.append("SyntaxError: invalid syntax")
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else:
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msg = traceback.format_exception_only(*self.exc[:2])
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fail(
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"Error evaluating %r expression\n"
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" %s\n"
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"%s" % (self._mark_name, self.expr, "\n".join(msg)),
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pytrace=False,
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)
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def _getglobals(self):
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d = {"os": os, "sys": sys, "platform": platform, "config": self.item.config}
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if hasattr(self.item, "obj"):
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d.update(self.item.obj.__globals__)
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return d
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def _istrue(self):
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if hasattr(self, "result"):
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return self.result
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self._marks = self._get_marks()
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if self._marks:
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self.result = False
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for mark in self._marks:
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self._mark = mark
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if "condition" in mark.kwargs:
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args = (mark.kwargs["condition"],)
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else:
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args = mark.args
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for expr in args:
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self.expr = expr
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if isinstance(expr, six.string_types):
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d = self._getglobals()
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result = cached_eval(self.item.config, expr, d)
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else:
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if "reason" not in mark.kwargs:
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# XXX better be checked at collection time
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msg = "you need to specify reason=STRING " "when using booleans as conditions."
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fail(msg)
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result = bool(expr)
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if result:
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self.result = True
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self.reason = mark.kwargs.get("reason", None)
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self.expr = expr
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return self.result
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if not args:
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self.result = True
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self.reason = mark.kwargs.get("reason", None)
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return self.result
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return False
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def get(self, attr, default=None):
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if self._mark is None:
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return default
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return self._mark.kwargs.get(attr, default)
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def getexplanation(self):
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expl = getattr(self, "reason", None) or self.get("reason", None)
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if not expl:
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if not hasattr(self, "expr"):
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return ""
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else:
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return "condition: " + str(self.expr)
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return expl
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