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merge Ronny's changes, add some documentation and changelog entries 

--HG--
branch : trunk
This commit is contained in:
holger krekel 2010-06-09 14:26:08 +02:00
parent d83bf93154 d1c8209875
commit 6951da7da0
8 changed files with 90 additions and 147 deletions
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8
CHANGELOG
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@ -4,6 +4,14 @@ Changes between 1.3.1 and 1.3.x
New features
++++++++++++++++++
- fix issue103: introduce additional "with py.test.raises(exc):" form, example::
with py.test.raises(ZeroDivisionError):
x = 0
1 / x
(thanks Ronny Pfannschmidt)
- Funcarg factories can now dynamically apply a marker to a
test invocation. This is particularly useful if a factory
provides parameters to a test which you expect-to-fail:

16
doc/test/features.txt
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@ -130,14 +130,20 @@ first failed and then succeeded.
asserting expected exceptions
----------------------------------------
In order to write assertions about exceptions, you use
one of two forms::
In order to write assertions about exceptions, you can use
``py.test.raises`` as a context manager like this::
py.test.raises(Exception, func, *args, **kwargs)
py.test.raises(Exception, "func(*args, **kwargs)")
with py.test.raises(ZeroDivisionError):
1 / 0
If you want to write test code that works on Python2.4 as well,
you may also use two other ways to test for an expected exception::
py.test.raises(ExpectedException, func, *args, **kwargs)
py.test.raises(ExpectedException, "func(*args, **kwargs)")
both of which execute the specified function with args and kwargs and
asserts that the given ``Exception`` is raised. The reporter will
asserts that the given ``ExpectedException`` is raised. The reporter will
provide you with helpful output in case of failures such as *no
exception* or *wrong exception*.

1
py/_path/gateway/__init__.py
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@ -1 +0,0 @@
#

65
py/_path/gateway/channeltest.py
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@ -1,65 +0,0 @@
import threading
class PathServer:
def __init__(self, channel):
self.channel = channel
self.C2P = {}
self.next_id = 0
threading.Thread(target=self.serve).start()
def p2c(self, path):
id = self.next_id
self.next_id += 1
self.C2P[id] = path
return id
def command_LIST(self, id, *args):
path = self.C2P[id]
answer = [(self.p2c(p), p.basename) for p in path.listdir(*args)]
self.channel.send(answer)
def command_DEL(self, id):
del self.C2P[id]
def command_GET(self, id, spec):
path = self.C2P[id]
self.channel.send(path._getbyspec(spec))
def command_READ(self, id):
path = self.C2P[id]
self.channel.send(path.read())
def command_JOIN(self, id, resultid, *args):
path = self.C2P[id]
assert resultid not in self.C2P
self.C2P[resultid] = path.join(*args)
def command_DIRPATH(self, id, resultid):
path = self.C2P[id]
assert resultid not in self.C2P
self.C2P[resultid] = path.dirpath()
def serve(self):
try:
while 1:
msg = self.channel.receive()
meth = getattr(self, 'command_' + msg[0])
meth(*msg[1:])
except EOFError:
pass
if __name__ == '__main__':
import py
gw = execnet.PopenGateway()
channel = gw._channelfactory.new()
srv = PathServer(channel)
c = gw.remote_exec("""
import remotepath
p = remotepath.RemotePath(channel.receive(), channel.receive())
channel.send(len(p.listdir()))
""")
c.send(channel)
c.send(srv.p2c(py.path.local('/tmp')))
print(c.receive())

21
py/_path/gateway/channeltest2.py
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@ -1,21 +0,0 @@
import py
from remotepath import RemotePath
SRC = open('channeltest.py', 'r').read()
SRC += '''
import py
srv = PathServer(channel.receive())
channel.send(srv.p2c(py.path.local("/tmp")))
'''
#gw = execnet.SshGateway('codespeak.net')
gw = execnet.PopenGateway()
gw.remote_init_threads(5)
c = gw.remote_exec(SRC, stdout=py.std.sys.stdout, stderr=py.std.sys.stderr)
subchannel = gw._channelfactory.new()
c.send(subchannel)
p = RemotePath(subchannel, c.receive())

47
py/_path/gateway/remotepath.py
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@ -1,47 +0,0 @@
import py, itertools
from py._path import common
COUNTER = itertools.count()
class RemotePath(common.PathBase):
sep = '/'
def __init__(self, channel, id, basename=None):
self._channel = channel
self._id = id
self._basename = basename
self._specs = {}
def __del__(self):
self._channel.send(('DEL', self._id))
def __repr__(self):
return 'RemotePath(%s)' % self.basename
def listdir(self, *args):
self._channel.send(('LIST', self._id) + args)
return [RemotePath(self._channel, id, basename)
for (id, basename) in self._channel.receive()]
def dirpath(self):
id = ~COUNTER.next()
self._channel.send(('DIRPATH', self._id, id))
return RemotePath(self._channel, id)
def join(self, *args):
id = ~COUNTER.next()
self._channel.send(('JOIN', self._id, id) + args)
return RemotePath(self._channel, id)
def _getbyspec(self, spec):
parts = spec.split(',')
ask = [x for x in parts if x not in self._specs]
if ask:
self._channel.send(('GET', self._id, ",".join(ask)))
for part, value in zip(ask, self._channel.receive()):
self._specs[part] = value
return [self._specs[x] for x in parts]
def read(self):
self._channel.send(('READ', self._id))
return self._channel.receive()

46
py/_plugin/pytest_runner.py
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@ -353,18 +353,30 @@ def xfail(reason=""):
xfail.Exception = XFailed
def raises(ExpectedException, *args, **kwargs):
""" if args[0] is callable: raise AssertionError if calling it with
""" assert that a code block/function call raises an exception.
If using Python 2.5 or above, you may use this function as a
context manager::
>>> with raises(ZeroDivisionError):
... 1/0
Or you can one of two forms:
if args[0] is callable: raise AssertionError if calling it with
the remaining arguments does not raise the expected exception.
if args[0] is a string: raise AssertionError if executing the
the string in the calling scope does not raise expected exception.
for examples:
x = 5
raises(TypeError, lambda x: x + 'hello', x=x)
raises(TypeError, "x + 'hello'")
examples:
>>> x = 5
>>> raises(TypeError, lambda x: x + 'hello', x=x)
>>> raises(TypeError, "x + 'hello'")
"""
__tracebackhide__ = True
assert args
if isinstance(args[0], str):
if not args:
return RaisesContext(ExpectedException)
elif isinstance(args[0], str):
code, = args
assert isinstance(code, str)
frame = sys._getframe(1)
@ -391,6 +403,26 @@ def raises(ExpectedException, *args, **kwargs):
raise ExceptionFailure(msg="DID NOT RAISE",
expr=args, expected=ExpectedException)
class RaisesContext(object):
def __init__(self, ExpectedException):
self.ExpectedException = ExpectedException
self.excinfo = None
def __enter__(self):
return self
def __exit__(self, *tp):
__tracebackhide__ = True
if tp[0] is None:
raise ExceptionFailure(msg="DID NOT RAISE",
expr=(),
expected=self.ExpectedException)
self.excinfo = py.code.ExceptionInfo(tp)
return issubclass(self.excinfo.type, self.ExpectedException)
raises.Exception = ExceptionFailure
def importorskip(modname, minversion=None):

31
testing/plugin/test_pytest_runner.py
View File

@ -340,6 +340,37 @@ class TestRaises:
except py.test.raises.Exception:
pass
@py.test.mark.skipif('sys.version < "2.5"')
def test_raises_as_contextmanager(self, testdir):
testdir.makepyfile("""
from __future__ import with_statement
import py
def test_simple():
with py.test.raises(ZeroDivisionError) as ctx:
1/0
print ctx.excinfo
assert ctx.excinfo.type is ZeroDivisionError
def test_noraise():
with py.test.raises(py.test.raises.Exception):
with py.test.raises(ValueError):
int()
def test_raise_wrong_exception_passes_by():
with py.test.raises(ZeroDivisionError):
with py.test.raises(ValueError):
1/0
""")
result = testdir.runpytest()
result.stdout.fnmatch_lines([
'*3 passed*',
])
def test_pytest_exit():
try:
py.test.exit("hello")