491 lines
16 KiB
Python
491 lines
16 KiB
Python
"""
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base test collection objects.
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Collectors and test Items form a tree
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that is usually built iteratively.
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"""
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import py
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from py.__.test.outcome import Skipped
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def configproperty(name):
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def fget(self):
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#print "retrieving %r property from %s" %(name, self.fspath)
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return self.config.getvalue(name, self.fspath)
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return property(fget)
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class ReprMetaInfo(object):
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def __init__(self, fspath=None, lineno=None, modpath=None):
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self.fspath = fspath
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self.lineno = lineno
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self.modpath = modpath
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def verboseline(self, basedir=None):
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params = self.__dict__.copy()
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if self.fspath:
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if basedir is not None:
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params['fspath'] = basedir.bestrelpath(self.fspath)
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if self.lineno is not None:
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params['lineno'] = self.lineno + 1
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if self.fspath and self.lineno and self.modpath:
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line = "%(fspath)s:%(lineno)s: %(modpath)s"
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elif self.fspath and self.modpath:
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line = "%(fspath)s: %(modpath)s"
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elif self.fspath and self.lineno:
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line = "%(fspath)s:%(lineno)s"
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else:
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line = "[nometainfo]"
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return line % params
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class Node(object):
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""" base class for Nodes in the collection tree.
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Collector nodes have children and
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Item nodes are terminal.
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All nodes of the collection tree carry a _config
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attribute for these reasons:
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- to access custom Collection Nodes from a project
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(defined in conftest's)
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- to pickle themselves relatively to the "topdir"
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- configuration/options for setup/teardown
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stdout/stderr capturing and execution of test items
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"""
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ReprMetaInfo = ReprMetaInfo
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def __init__(self, name, parent=None, config=None):
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self.name = name
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self.parent = parent
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if config is None:
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config = parent.config
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self.config = config
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self.fspath = getattr(parent, 'fspath', None)
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#
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# note to myself: Pickling is uh.
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#
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def __getstate__(self):
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return (self.name, self.parent)
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def __setstate__(self, (name, parent)):
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try:
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colitems = parent._memocollect()
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except KeyboardInterrupt:
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raise
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except Exception:
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# seems our parent can't collect us
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# so let's be somewhat operable
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self.name = name
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self.parent = parent
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self.config = parent.config
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#self._obj = "could not unpickle"
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else:
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for colitem in colitems:
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if colitem.name == name:
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# we are a copy that will not be returned
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# by our parent
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self.__dict__ = colitem.__dict__
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break
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def __repr__(self):
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if getattr(self.config.option, 'debug', False):
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return "<%s %r %0x>" %(self.__class__.__name__,
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getattr(self, 'name', None), id(self))
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else:
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return "<%s %r>" %(self.__class__.__name__,
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getattr(self, 'name', None))
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# methods for ordering nodes
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def __eq__(self, other):
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if not isinstance(other, Node):
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return False
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return self.name == other.name and self.parent == other.parent
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def __ne__(self, other):
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return not self == other
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def __hash__(self):
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return hash((self.name, self.parent))
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def __cmp__(self, other):
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if not isinstance(other, Node):
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return -1
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s1 = self._getsortvalue()
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s2 = other._getsortvalue()
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return cmp(s1, s2)
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def setup(self):
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pass
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def teardown(self):
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pass
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def _memoizedcall(self, attrname, function):
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exattrname = "_ex_" + attrname
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failure = getattr(self, exattrname, None)
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if failure is not None:
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raise failure[0], failure[1], failure[2]
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if hasattr(self, attrname):
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return getattr(self, attrname)
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try:
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res = function()
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except (KeyboardInterrupt, SystemExit):
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raise
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except:
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failure = py.std.sys.exc_info()
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setattr(self, exattrname, failure)
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raise
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setattr(self, attrname, res)
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return res
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def listchain(self, rootfirst=False):
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""" return list of all parent collectors up to self,
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starting form root of collection tree. """
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l = [self]
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while 1:
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x = l[-1]
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if x.parent is not None:
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l.append(x.parent)
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else:
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if not rootfirst:
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l.reverse()
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return l
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def listnames(self):
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return [x.name for x in self.listchain()]
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def _getitembynames(self, namelist):
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cur = self
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for name in namelist:
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if name:
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next = cur.collect_by_name(name)
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if next is None:
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existingnames = [x.name for x in self._memocollect()]
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msg = ("Collector %r does not have name %r "
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"existing names are: %s" %
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(cur, name, existingnames))
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raise AssertionError(msg)
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cur = next
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return cur
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def _getfsnode(self, path):
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# this method is usually called from
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# config.getfsnode() which returns a colitem
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# from filename arguments
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#
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# pytest's collector tree does not neccessarily
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# follow the filesystem and we thus need to do
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# some special matching code here because
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# _getitembynames() works by colitem names, not
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# basenames.
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if path == self.fspath:
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return self
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basenames = path.relto(self.fspath).split(path.sep)
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cur = self
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while basenames:
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basename = basenames.pop(0)
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assert basename
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fspath = cur.fspath.join(basename)
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colitems = cur._memocollect()
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l = []
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for colitem in colitems:
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if colitem.fspath == fspath or colitem.name == basename:
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l.append(colitem)
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if not l:
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msg = ("Collector %r does not provide %r colitem "
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"existing colitems are: %s" %
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(cur, fspath, colitems))
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raise AssertionError(msg)
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if basenames:
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if len(l) > 1:
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msg = ("Collector %r has more than one %r colitem "
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"existing colitems are: %s" %
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(cur, fspath, colitems))
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raise AssertionError(msg)
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cur = l[0]
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else:
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if len(l) > 1:
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cur = l
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else:
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cur = l[0]
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break
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return cur
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def readkeywords(self):
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return dict([(x, True) for x in self._keywords()])
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def _keywords(self):
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return [self.name]
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def _skipbykeyword(self, keywordexpr):
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""" return True if they given keyword expression means to
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skip this collector/item.
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"""
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if not keywordexpr:
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return
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chain = self.listchain()
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for key in filter(None, keywordexpr.split()):
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eor = key[:1] == '-'
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if eor:
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key = key[1:]
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if not (eor ^ self._matchonekeyword(key, chain)):
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return True
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def _matchonekeyword(self, key, chain):
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elems = key.split(".")
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# XXX O(n^2), anyone cares?
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chain = [item._keywords() for item in chain if item._keywords()]
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for start, _ in enumerate(chain):
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if start + len(elems) > len(chain):
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return False
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for num, elem in enumerate(elems):
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for keyword in chain[num + start]:
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ok = False
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if elem in keyword:
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ok = True
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break
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if not ok:
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break
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if num == len(elems) - 1 and ok:
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return True
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return False
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def _getsortvalue(self):
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return self.name
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def _prunetraceback(self, traceback):
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return traceback
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def _totrail(self):
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""" provide a trail relative to the topdir,
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which can be used to reconstruct the
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collector (possibly on a different host
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starting from a different topdir).
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"""
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chain = self.listchain()
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topdir = self.config.topdir
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relpath = chain[0].fspath.relto(topdir)
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if not relpath:
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if chain[0].fspath == topdir:
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relpath = "."
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else:
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raise ValueError("%r not relative to topdir %s"
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%(chain[0].fspath, topdir))
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return relpath, tuple([x.name for x in chain[1:]])
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def _fromtrail(trail, config):
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relpath, names = trail
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fspath = config.topdir.join(relpath)
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col = config.getfsnode(fspath)
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return col._getitembynames(names)
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_fromtrail = staticmethod(_fromtrail)
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def _repr_failure_py(self, excinfo, outerr):
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excinfo.traceback = self._prunetraceback(excinfo.traceback)
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# XXX temporary hack: getrepr() should not take a 'style' argument
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# at all; it should record all data in all cases, and the style
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# should be parametrized in toterminal().
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if self.config.option.tbstyle == "short":
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style = "short"
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else:
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style = "long"
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repr = excinfo.getrepr(funcargs=True,
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showlocals=self.config.option.showlocals,
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style=style)
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for secname, content in zip(["out", "err"], outerr):
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if content:
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repr.addsection("Captured std%s" % secname, content.rstrip())
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return repr
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repr_failure = _repr_failure_py
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shortfailurerepr = "F"
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class Collector(Node):
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"""
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Collector instances create children through collect()
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and thus iteratively build a tree. attributes::
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parent: attribute pointing to the parent collector
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(or None if this is the root collector)
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name: basename of this collector object
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"""
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Directory = configproperty('Directory')
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Module = configproperty('Module')
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#DoctestFile = configproperty('DoctestFile')
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def collect(self):
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""" returns a list of children (items and collectors)
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for this collection node.
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"""
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raise NotImplementedError("abstract")
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def collect_by_name(self, name):
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""" return a child matching the given name, else None. """
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for colitem in self._memocollect():
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if colitem.name == name:
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return colitem
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def repr_failure(self, excinfo, outerr):
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""" represent a failure. """
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return self._repr_failure_py(excinfo, outerr)
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def _memocollect(self):
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""" internal helper method to cache results of calling collect(). """
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return self._memoizedcall('_collected', self.collect)
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# **********************************************************************
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# DEPRECATED METHODS
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# **********************************************************************
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def _deprecated_collect(self):
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# avoid recursion:
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# collect -> _deprecated_collect -> custom run() ->
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# super().run() -> collect
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attrname = '_depcollectentered'
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if hasattr(self, attrname):
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return
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setattr(self, attrname, True)
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method = getattr(self.__class__, 'run', None)
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if method is not None and method != Collector.run:
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warnoldcollect()
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names = self.run()
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return filter(None, [self.join(name) for name in names])
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def run(self):
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""" DEPRECATED: returns a list of names available from this collector.
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You can return an empty list. Callers of this method
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must take care to catch exceptions properly.
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"""
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warnoldcollect()
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return [colitem.name for colitem in self._memocollect()]
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def join(self, name):
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""" DEPRECATED: return a child collector or item for the given name.
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If the return value is None there is no such child.
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"""
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warnoldcollect()
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return self.collect_by_name(name)
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class FSCollector(Collector):
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def __init__(self, fspath, parent=None, config=None):
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fspath = py.path.local(fspath)
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super(FSCollector, self).__init__(fspath.basename, parent, config=config)
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self.fspath = fspath
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def __getstate__(self):
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if self.parent is None:
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# the root node needs to pickle more context info
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topdir = self.config.topdir
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relpath = self.fspath.relto(topdir)
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if not relpath:
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if self.fspath == topdir:
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relpath = "."
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else:
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raise ValueError("%r not relative to topdir %s"
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%(self.fspath, topdir))
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return (self.name, self.config, relpath)
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else:
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return (self.name, self.parent)
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def __setstate__(self, picklestate):
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if len(picklestate) == 3:
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# root node
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name, config, relpath = picklestate
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fspath = config.topdir.join(relpath)
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fsnode = config.getfsnode(fspath)
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self.__dict__.update(fsnode.__dict__)
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else:
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name, parent = picklestate
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self.__init__(parent.fspath.join(name), parent=parent)
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class File(FSCollector):
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""" base class for collecting tests from a file. """
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class Directory(FSCollector):
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def recfilter(self, path):
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if path.check(dir=1, dotfile=0):
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return path.basename not in ('CVS', '_darcs', '{arch}')
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def collect(self):
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l = self._deprecated_collect()
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if l is not None:
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return l
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l = []
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for path in self.fspath.listdir(sort=True):
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res = self.consider(path)
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if res is not None:
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if isinstance(res, (list, tuple)):
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l.extend(res)
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else:
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l.append(res)
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return l
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def consider(self, path):
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if path.check(file=1):
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res = self.consider_file(path)
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elif path.check(dir=1):
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res = self.consider_dir(path)
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else:
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res = None
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if isinstance(res, list):
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# throw out identical modules
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l = []
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for x in res:
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if x not in l:
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l.append(x)
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res = l
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return res
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def consider_file(self, path):
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return self.config.api.pytest_collect_file(path=path, parent=self)
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def consider_dir(self, path, usefilters=None):
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if usefilters is not None:
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py.log._apiwarn("0.99", "usefilters argument not needed")
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res = self.config.api.pytest_collect_recurse(path=path, parent=self)
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if res is None or res:
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return self.config.api.pytest_collect_directory(
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path=path, parent=self)
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class Item(Node):
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""" a basic test item. """
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def _deprecated_testexecution(self):
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if self.__class__.run != Item.run:
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warnoldtestrun()
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self.run()
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return True
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elif self.__class__.execute != Item.execute:
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warnoldtestrun()
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self.execute(self.obj, *self._args)
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return True
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def run(self):
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warnoldtestrun()
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return self.execute(self.obj, *self._args)
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def execute(self, obj, *args):
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warnoldtestrun()
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return obj(*args)
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def repr_metainfo(self):
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try:
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return self.ReprMetaInfo(self.fspath, modpath=self.__class__.__name__)
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except AttributeError:
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code = py.code.Code(self.execute)
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return self.ReprMetaInfo(code.path, code.firstlineno)
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def runtest(self):
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""" execute this test item."""
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def warnoldcollect():
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py.log._apiwarn("1.0",
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"implement collector.collect() instead of "
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"collector.run() and collector.join()",
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stacklevel=2)
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def warnoldtestrun():
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py.log._apiwarn("1.0",
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"implement item.runtest() instead of "
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"item.run() and item.execute()",
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stacklevel=2)
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