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"""Utility functions and classes used by nose internally. """ import inspect import itertools import logging import stat import os import re import sys import types import unittest from nose.pyversion import ClassType, TypeType, isgenerator, ismethod log = logging.getLogger('nose') ident_re = re.compile(r'^[A-Za-z_][A-Za-z0-9_.]*$') class_types = (ClassType, TypeType) skip_pattern = r"(?:\.svn)|(?:[^.]+\.py[co])|(?:.*~)|(?:.*\$py\.class)|(?:__pycache__)" try: set() set = set # make from nose.util import set happy except NameError: try: from sets import Set as set except ImportError: pass def ls_tree(dir_path="", skip_pattern=skip_pattern, indent="|-- ", branch_indent="| ", last_indent="`-- ", last_branch_indent=" "): # TODO: empty directories look like non-directory files return "\n".join(_ls_tree_lines(dir_path, skip_pattern, indent, branch_indent, last_indent, last_branch_indent)) def _ls_tree_lines(dir_path, skip_pattern, indent, branch_indent, last_indent, last_branch_indent): if dir_path == "": dir_path = os.getcwd() lines = [] names = os.listdir(dir_path) names.sort() dirs, nondirs = [], [] for name in names: if re.match(skip_pattern, name): continue if os.path.isdir(os.path.join(dir_path, name)): dirs.append(name) else: nondirs.append(name) # list non-directories first entries = list(itertools.chain([(name, False) for name in nondirs], [(name, True) for name in dirs])) def ls_entry(name, is_dir, ind, branch_ind): if not is_dir: yield ind + name else: path = os.path.join(dir_path, name) if not os.path.islink(path): yield ind + name subtree = _ls_tree_lines(path, skip_pattern, indent, branch_indent, last_indent, last_branch_indent) for x in subtree: yield branch_ind + x for name, is_dir in entries[:-1]: for line in ls_entry(name, is_dir, indent, branch_indent): yield line if entries: name, is_dir = entries[-1] for line in ls_entry(name, is_dir, last_indent, last_branch_indent): yield line def absdir(path): """Return absolute, normalized path to directory, if it exists; None otherwise. """ if not os.path.isabs(path): path = os.path.normpath(os.path.abspath(os.path.join(os.getcwd(), path))) if path is None or not os.path.isdir(path): return None return path def absfile(path, where=None): """Return absolute, normalized path to file (optionally in directory where), or None if the file can't be found either in where or the current working directory. """ orig = path if where is None: where = os.getcwd() if isinstance(where, list) or isinstance(where, tuple): for maybe_path in where: maybe_abs = absfile(path, maybe_path) if maybe_abs is not None: return maybe_abs return None if not os.path.isabs(path): path = os.path.normpath(os.path.abspath(os.path.join(where, path))) if path is None or not os.path.exists(path): if where != os.getcwd(): # try the cwd instead path = os.path.normpath(os.path.abspath(os.path.join(os.getcwd(), orig))) if path is None or not os.path.exists(path): return None if os.path.isdir(path): # might want an __init__.py from pacakge init = os.path.join(path,'__init__.py') if os.path.isfile(init): return init elif os.path.isfile(path): return path return None def anyp(predicate, iterable): for item in iterable: if predicate(item): return True return False def file_like(name): """A name is file-like if it is a path that exists, or it has a directory part, or it ends in .py, or it isn't a legal python identifier. """ return (os.path.exists(name) or os.path.dirname(name) or name.endswith('.py') or not ident_re.match(os.path.splitext(name)[0])) def func_lineno(func): """Get the line number of a function. First looks for compat_co_firstlineno, then func_code.co_first_lineno. """ try: return func.compat_co_firstlineno except AttributeError: try: return func.__code__.co_firstlineno except AttributeError: return -1 def isclass(obj): """Is obj a class? Inspect's isclass is too liberal and returns True for objects that can't be subclasses of anything. """ obj_type = type(obj) return obj_type in class_types or issubclass(obj_type, type) # backwards compat (issue #64) is_generator = isgenerator def ispackage(path): """ Is this path a package directory? >>> ispackage('nose') True >>> ispackage('unit_tests') False >>> ispackage('nose/plugins') True >>> ispackage('nose/loader.py') False """ if os.path.isdir(path): # at least the end of the path must be a legal python identifier # and __init__.py[co] must exist end = os.path.basename(path) if ident_re.match(end): for init in ('__init__.py', '__init__.pyc', '__init__.pyo'): if os.path.isfile(os.path.join(path, init)): return True if sys.platform.startswith('java') and \ os.path.isfile(os.path.join(path, '__init__$py.class')): return True return False def isproperty(obj): """ Is this a property? >>> class Foo: ... def got(self): ... return 2 ... def get(self): ... return 1 ... get = property(get) >>> isproperty(Foo.got) False >>> isproperty(Foo.get) True """ return type(obj) == property def getfilename(package, relativeTo=None): """Find the python source file for a package, relative to a particular directory (defaults to current working directory if not given). """ if relativeTo is None: relativeTo = os.getcwd() path = os.path.join(relativeTo, os.sep.join(package.split('.'))) if os.path.exists(path + '/__init__.py'): return path filename = path + '.py' if os.path.exists(filename): return filename return None def getpackage(filename): """ Find the full dotted package name for a given python source file name. Returns None if the file is not a python source file. >>> getpackage('foo.py') 'foo' >>> getpackage('biff/baf.py') 'baf' >>> getpackage('nose/util.py') 'nose.util' Works for directories too. >>> getpackage('nose') 'nose' >>> getpackage('nose/plugins') 'nose.plugins' And __init__ files stuck onto directories >>> getpackage('nose/plugins/__init__.py') 'nose.plugins' Absolute paths also work. >>> path = os.path.abspath(os.path.join('nose', 'plugins')) >>> getpackage(path) 'nose.plugins' """ src_file = src(filename) if (os.path.isdir(src_file) or not src_file.endswith('.py')) and not ispackage(src_file): return None base, ext = os.path.splitext(os.path.basename(src_file)) if base == '__init__': mod_parts = [] else: mod_parts = [base] path, part = os.path.split(os.path.split(src_file)[0]) while part: if ispackage(os.path.join(path, part)): mod_parts.append(part) else: break path, part = os.path.split(path) mod_parts.reverse() return '.'.join(mod_parts) def ln(label): """Draw a 70-char-wide divider, with label in the middle. >>> ln('hello there') '---------------------------- hello there -----------------------------' """ label_len = len(label) + 2 chunk = (70 - label_len) // 2 out = '%s %s %s' % ('-' * chunk, label, '-' * chunk) pad = 70 - len(out) if pad > 0: out = out + ('-' * pad) return out def resolve_name(name, module=None): """Resolve a dotted name to a module and its parts. This is stolen wholesale from unittest.TestLoader.loadTestByName. >>> resolve_name('nose.util') #doctest: +ELLIPSIS <module 'nose.util' from...> >>> resolve_name('nose.util.resolve_name') #doctest: +ELLIPSIS <function resolve_name at...> """ parts = name.split('.') parts_copy = parts[:] if module is None: while parts_copy: try: log.debug("__import__ %s", name) module = __import__('.'.join(parts_copy)) break except ImportError: del parts_copy[-1] if not parts_copy: raise parts = parts[1:] obj = module log.debug("resolve: %s, %s, %s, %s", parts, name, obj, module) for part in parts: obj = getattr(obj, part) return obj def split_test_name(test): """Split a test name into a 3-tuple containing file, module, and callable names, any of which (but not all) may be blank. Test names are in the form: file_or_module:callable Either side of the : may be dotted. To change the splitting behavior, you can alter nose.util.split_test_re. """ norm = os.path.normpath file_or_mod = test fn = None if not ':' in test: # only a file or mod part if file_like(test): return (norm(test), None, None) else: return (None, test, None) # could be path|mod:callable, or a : in the file path someplace head, tail = os.path.split(test) if not head: # this is a case like 'foo:bar' -- generally a module # name followed by a callable, but also may be a windows # drive letter followed by a path try: file_or_mod, fn = test.split(':') if file_like(fn): # must be a funny path file_or_mod, fn = test, None except ValueError: # more than one : in the test # this is a case like c:\some\path.py:a_test parts = test.split(':') if len(parts[0]) == 1: file_or_mod, fn = ':'.join(parts[:-1]), parts[-1] else: # nonsense like foo:bar:baz raise ValueError("Test name '%s' could not be parsed. Please " "format test names as path:callable or " "module:callable." % (test,)) elif not tail: # this is a case like 'foo:bar/' # : must be part of the file path, so ignore it file_or_mod = test else: if ':' in tail: file_part, fn = tail.split(':') else: file_part = tail file_or_mod = os.sep.join([head, file_part]) if file_or_mod: if file_like(file_or_mod): return (norm(file_or_mod), None, fn) else: return (None, file_or_mod, fn) else: return (None, None, fn) split_test_name.__test__ = False # do not collect def test_address(test): """Find the test address for a test, which may be a module, filename, class, method or function. """ if hasattr(test, "address"): return test.address() # type-based polymorphism sucks in general, but I believe is # appropriate here t = type(test) file = module = call = None if t == types.ModuleType: file = getattr(test, '__file__', None) module = getattr(test, '__name__', None) return (src(file), module, call) if t == types.FunctionType or issubclass(t, type) or t == type: module = getattr(test, '__module__', None) if module is not None: m = sys.modules[module] file = getattr(m, '__file__', None) if file is not None: file = os.path.abspath(file) call = getattr(test, '__name__', None) return (src(file), module, call) if t == types.MethodType: cls_adr = test_address(test.__self__.__class__) return (src(cls_adr[0]), cls_adr[1], "%s.%s" % (cls_adr[2], test.__name__)) # handle unittest.TestCase instances if isinstance(test, unittest.TestCase): if (hasattr(test, '_FunctionTestCase__testFunc') # pre 2.7 or hasattr(test, '_testFunc')): # 2.7 # unittest FunctionTestCase try: return test_address(test._FunctionTestCase__testFunc) except AttributeError: return test_address(test._testFunc) # regular unittest.TestCase cls_adr = test_address(test.__class__) # 2.5 compat: __testMethodName changed to _testMethodName try: method_name = test._TestCase__testMethodName except AttributeError: method_name = test._testMethodName return (src(cls_adr[0]), cls_adr[1], "%s.%s" % (cls_adr[2], method_name)) if (hasattr(test, '__class__') and test.__class__.__module__ not in ('__builtin__', 'builtins')): return test_address(test.__class__) raise TypeError("I don't know what %s is (%s)" % (test, t)) test_address.__test__ = False # do not collect def try_run(obj, names): """Given a list of possible method names, try to run them with the provided object. Keep going until something works. Used to run setup/teardown methods for module, package, and function tests. """ for name in names: func = getattr(obj, name, None) if func is not None: if type(obj) == types.ModuleType: # py.test compatibility if isinstance(func, types.FunctionType): args, varargs, varkw, defaults = \ inspect.getargspec(func) else: # Not a function. If it's callable, call it anyway if hasattr(func, '__call__') and not inspect.ismethod(func): func = func.__call__ try: args, varargs, varkw, defaults = \ inspect.getargspec(func) args.pop(0) # pop the self off except TypeError: raise TypeError("Attribute %s of %r is not a python " "function. Only functions or callables" " may be used as fixtures." % (name, obj)) if len(args): log.debug("call fixture %s.%s(%s)", obj, name, obj) return func(obj) log.debug("call fixture %s.%s", obj, name) return func() def src(filename): """Find the python source file for a .pyc, .pyo or $py.class file on jython. Returns the filename provided if it is not a python source file. """ if filename is None: return filename if sys.platform.startswith('java') and filename.endswith('$py.class'): return '.'.join((filename[:-9], 'py')) base, ext = os.path.splitext(filename) if ext in ('.pyc', '.pyo', '.py'): return '.'.join((base, 'py')) return filename def regex_last_key(regex): """Sort key function factory that puts items that match a regular expression last. >>> from nose.config import Config >>> from nose.pyversion import sort_list >>> c = Config() >>> regex = c.testMatch >>> entries = ['.', '..', 'a_test', 'src', 'lib', 'test', 'foo.py'] >>> sort_list(entries, regex_last_key(regex)) >>> entries ['.', '..', 'foo.py', 'lib', 'src', 'a_test', 'test'] """ def k(obj): if regex.search(obj): return (1, obj) return (0, obj) return k def tolist(val): """Convert a value that may be a list or a (possibly comma-separated) string into a list. The exception: None is returned as None, not [None]. >>> tolist(["one", "two"]) ['one', 'two'] >>> tolist("hello") ['hello'] >>> tolist("separate,values, with, commas, spaces , are ,ok") ['separate', 'values', 'with', 'commas', 'spaces', 'are', 'ok'] """ if val is None: return None try: # might already be a list val.extend([]) return val except AttributeError: pass # might be a string try: return re.split(r'\s*,\s*', val) except TypeError: # who knows... return list(val) class odict(dict): """Simple ordered dict implementation, based on: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/107747 """ def __init__(self, *arg, **kw): self._keys = [] super(odict, self).__init__(*arg, **kw) def __delitem__(self, key): super(odict, self).__delitem__(key) self._keys.remove(key) def __setitem__(self, key, item): super(odict, self).__setitem__(key, item) if key not in self._keys: self._keys.append(key) def __str__(self): return "{%s}" % ', '.join(["%r: %r" % (k, v) for k, v in list(self.items())]) def clear(self): super(odict, self).clear() self._keys = [] def copy(self): d = super(odict, self).copy() d._keys = self._keys[:] return d def items(self): return list(zip(self._keys, list(self.values()))) def keys(self): return self._keys[:] def setdefault(self, key, failobj=None): item = super(odict, self).setdefault(key, failobj) if key not in self._keys: self._keys.append(key) return item def update(self, dict): super(odict, self).update(dict) for key in list(dict.keys()): if key not in self._keys: self._keys.append(key) def values(self): return list(map(self.get, self._keys)) def transplant_func(func, module): """ Make a function imported from module A appear as if it is located in module B. >>> from pprint import pprint >>> pprint.__module__ 'pprint' >>> pp = transplant_func(pprint, __name__) >>> pp.__module__ 'nose.util' The original function is not modified. >>> pprint.__module__ 'pprint' Calling the transplanted function calls the original. >>> pp([1, 2]) [1, 2] >>> pprint([1,2]) [1, 2] """ from nose.tools import make_decorator if isgenerator(func): def newfunc(*arg, **kw): for v in func(*arg, **kw): yield v else: def newfunc(*arg, **kw): return func(*arg, **kw) newfunc = make_decorator(func)(newfunc) newfunc.__module__ = module return newfunc def transplant_class(cls, module): """ Make a class appear to reside in `module`, rather than the module in which it is actually defined. >>> from nose.failure import Failure >>> Failure.__module__ 'nose.failure' >>> Nf = transplant_class(Failure, __name__) >>> Nf.__module__ 'nose.util' >>> Nf.__name__ 'Failure' """ class C(cls): pass C.__module__ = module C.__name__ = cls.__name__ return C def safe_str(val, encoding='utf-8'): try: return str(val) except UnicodeEncodeError: if isinstance(val, Exception): return ' '.join([safe_str(arg, encoding) for arg in val]) return str(val).encode(encoding) def is_executable(file): if not os.path.exists(file): return False st = os.stat(file) return bool(st.st_mode & (stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)) if __name__ == '__main__': import doctest doctest.testmod()
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