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test_basics.py
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test_basics.py
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# -*- coding: utf-8 -*-
from __future__ import with_statement
import inspect
import os
import subprocess
import sys
import execnet
import py
import pytest
from execnet import gateway
from execnet import gateway_base
from execnet import gateway_io
from execnet.gateway_base import ChannelFactory
from execnet.gateway_base import Message
from execnet.gateway_base import Popen2IO
try:
from StringIO import StringIO as BytesIO
except:
from io import BytesIO
skip_win_pypy = pytest.mark.xfail(
condition=hasattr(sys, "pypy_version_info") and sys.platform.startswith("win"),
reason="failing on Windows on PyPy (#63)",
)
class TestSerializeAPI:
pytestmark = [pytest.mark.parametrize("val", ["123", 42, [1, 2, 3], ["23", 25]])]
def test_serializer_api(self, val):
dumped = execnet.dumps(val)
val2 = execnet.loads(dumped)
assert val == val2
def test_mmap(self, tmpdir, val):
mmap = pytest.importorskip("mmap").mmap
p = tmpdir.join("data")
with p.open("wb") as f:
f.write(execnet.dumps(val))
f = p.open("r+b")
m = mmap(f.fileno(), 0)
val2 = execnet.load(m)
assert val == val2
def test_bytesio(self, val):
f = py.io.BytesIO()
execnet.dump(f, val)
read = py.io.BytesIO(f.getvalue())
val2 = execnet.load(read)
assert val == val2
def test_serializer_api_version_error(monkeypatch):
bchr = gateway_base.bchr
monkeypatch.setattr(gateway_base, "DUMPFORMAT_VERSION", bchr(1))
dumped = execnet.dumps(42)
monkeypatch.setattr(gateway_base, "DUMPFORMAT_VERSION", bchr(2))
pytest.raises(execnet.DataFormatError, lambda: execnet.loads(dumped))
def test_errors_on_execnet():
assert hasattr(execnet, "RemoteError")
assert hasattr(execnet, "TimeoutError")
assert hasattr(execnet, "DataFormatError")
def test_subprocess_interaction(anypython):
line = gateway_io.popen_bootstrapline
compile(line, "xyz", "exec")
args = [str(anypython), "-c", line]
popen = subprocess.Popen(
args,
bufsize=0,
universal_newlines=True,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
)
def send(line):
popen.stdin.write(line)
if sys.version_info > (3, 0) or sys.platform.startswith("java"):
popen.stdin.flush()
def receive():
return popen.stdout.readline()
try:
source = py.code.Source(read_write_loop, "read_write_loop()")
repr_source = repr(str(source)) + "\n"
sendline = repr_source
send(sendline)
s = receive()
assert s == "ok\n"
send("hello\n")
s = receive()
assert s == "received: hello\n"
send("world\n")
s = receive()
assert s == "received: world\n"
send("\n") # terminate loop
finally:
popen.stdin.close()
popen.stdout.close()
popen.wait()
def read_write_loop():
sys.stdout.write("ok\n")
sys.stdout.flush()
while 1:
try:
line = sys.stdin.readline()
if not line.strip():
break
sys.stdout.write("received: %s" % line)
sys.stdout.flush()
except (IOError, EOFError):
break
def test_io_message(anypython, tmpdir, execmodel):
check = tmpdir.join("check.py")
check.write(
py.code.Source(
gateway_base,
"""
try:
from io import BytesIO
except ImportError:
from StringIO import StringIO as BytesIO
import tempfile
temp_out = BytesIO()
temp_in = BytesIO()
io = Popen2IO(temp_out, temp_in, get_execmodel({backend!r}))
for i, handler in enumerate(Message._types):
print ("checking %s %s" %(i, handler))
for data in "hello", "hello".encode('ascii'):
msg1 = Message(i, i, dumps(data))
msg1.to_io(io)
x = io.outfile.getvalue()
io.outfile.truncate(0)
io.outfile.seek(0)
io.infile.seek(0)
io.infile.write(x)
io.infile.seek(0)
msg2 = Message.from_io(io)
assert msg1.channelid == msg2.channelid, (msg1, msg2)
assert msg1.data == msg2.data, (msg1.data, msg2.data)
assert msg1.msgcode == msg2.msgcode
print ("all passed")
""".format(
backend=execmodel.backend
),
)
)
# out = py.process.cmdexec("%s %s" %(executable,check))
out = anypython.sysexec(check)
print(out)
assert "all passed" in out
def test_popen_io(anypython, tmpdir, execmodel):
check = tmpdir.join("check.py")
check.write(
py.code.Source(
gateway_base,
"""
do_exec("io = init_popen_io(get_execmodel({backend!r}))", globals())
io.write("hello".encode('ascii'))
s = io.read(1)
assert s == "x".encode('ascii')
""".format(
backend=execmodel.backend
),
)
)
from subprocess import Popen, PIPE
args = [str(anypython), str(check)]
proc = Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE)
proc.stdin.write("x".encode("ascii"))
stdout, stderr = proc.communicate()
print(stderr)
proc.wait()
assert "hello".encode("ascii") in stdout
def test_popen_io_readloop(monkeypatch, execmodel):
sio = BytesIO("test".encode("ascii"))
io = Popen2IO(sio, sio, execmodel)
real_read = io._read
def newread(numbytes):
if numbytes > 1:
numbytes = numbytes - 1
return real_read(numbytes)
io._read = newread
result = io.read(3)
assert result == "tes".encode("ascii")
def test_rinfo_source(anypython, tmpdir):
check = tmpdir.join("check.py")
check.write(
py.code.Source(
"""
class Channel:
def send(self, data):
assert eval(repr(data), {}) == data
channel = Channel()
""",
gateway.rinfo_source,
"""
print ('all passed')
""",
)
)
out = anypython.sysexec(check)
print(out)
assert "all passed" in out
def test_geterrortext(anypython, tmpdir):
check = tmpdir.join("check.py")
check.write(
py.code.Source(
gateway_base,
"""
class Arg:
pass
errortext = geterrortext((Arg, "1", 4))
assert "Arg" in errortext
import sys
try:
raise ValueError("17")
except ValueError:
excinfo = sys.exc_info()
s = geterrortext(excinfo)
assert "17" in s
print ("all passed")
""",
)
)
out = anypython.sysexec(check)
print(out)
assert "all passed" in out
@pytest.mark.skipif("not hasattr(os, 'dup')")
def test_stdouterrin_setnull(execmodel):
cap = py.io.StdCaptureFD()
gateway_base.init_popen_io(execmodel)
os.write(1, "hello".encode("ascii"))
os.read(0, 1)
out, err = cap.reset()
assert not out
assert not err
class PseudoChannel:
class gateway:
class _channelfactory:
finished = False
def __init__(self):
self._sent = []
self._closed = []
self.id = 1000
def send(self, obj):
self._sent.append(obj)
def close(self, errortext=None):
self._closed.append(errortext)
def test_exectask(execmodel):
io = py.io.BytesIO()
io.execmodel = execmodel
gw = gateway_base.WorkerGateway(io, id="something")
ch = PseudoChannel()
gw.executetask((ch, ("raise ValueError()", None, {})))
assert "ValueError" in str(ch._closed[0])
class TestMessage:
def test_wire_protocol(self):
for i, handler in enumerate(Message._types):
one = py.io.BytesIO()
data = "23".encode("ascii")
Message(i, 42, data).to_io(one)
two = py.io.BytesIO(one.getvalue())
msg = Message.from_io(two)
assert msg.msgcode == i
assert isinstance(msg, Message)
assert msg.channelid == 42
assert msg.data == data
assert isinstance(repr(msg), str)
class TestPureChannel:
@pytest.fixture
def fac(self, execmodel):
class Gateway:
pass
Gateway.execmodel = execmodel
return ChannelFactory(Gateway)
def test_factory_create(self, fac):
chan1 = fac.new()
assert chan1.id == 1
chan2 = fac.new()
assert chan2.id == 3
def test_factory_getitem(self, fac):
chan1 = fac.new()
assert fac._channels[chan1.id] == chan1
chan2 = fac.new()
assert fac._channels[chan2.id] == chan2
def test_channel_timeouterror(self, fac):
channel = fac.new()
pytest.raises(IOError, channel.waitclose, timeout=0.01)
def test_channel_makefile_incompatmode(self, fac):
channel = fac.new()
with pytest.raises(ValueError):
channel.makefile("rw")
class TestSourceOfFunction(object):
def test_lambda_unsupported(self):
pytest.raises(ValueError, gateway._source_of_function, lambda: 1)
def test_wrong_prototype_fails(self):
def prototype(wrong):
pass
pytest.raises(ValueError, gateway._source_of_function, prototype)
def test_function_without_known_source_fails(self):
# this one wont be able to find the source
mess = {}
py.builtin.exec_("def fail(channel): pass", mess, mess)
print(inspect.getsourcefile(mess["fail"]))
pytest.raises(ValueError, gateway._source_of_function, mess["fail"])
def test_function_with_closure_fails(self):
mess = {}
def closure(channel):
print(mess)
pytest.raises(ValueError, gateway._source_of_function, closure)
def test_source_of_nested_function(self):
def working(channel):
pass
send_source = gateway._source_of_function(working).lstrip("\r\n")
expected = "def working(channel):\n pass\n"
assert send_source == expected
class TestGlobalFinder(object):
def check(self, func):
src = py.code.Source(func)
code = py.code.Code(func)
return gateway._find_non_builtin_globals(str(src), code.raw)
def test_local(self):
def f(a, b, c):
d = 3
return d
assert self.check(f) == []
def test_global(self):
def f(a, b):
sys
d = 4
return d
assert self.check(f) == ["sys"]
def test_builtin(self):
def f():
len
assert self.check(f) == []
def test_function_with_global_fails(self):
def func(channel):
sys
pytest.raises(ValueError, gateway._source_of_function, func)
def test_method_call(self):
# method names are reason
# for the simple code object based heusteric failing
def f(channel):
channel.send(dict(testing=2))
assert self.check(f) == []
@skip_win_pypy
def test_remote_exec_function_with_kwargs(anypython, makegateway):
def func(channel, data):
channel.send(data)
gw = makegateway("popen//python=%s" % anypython)
print("local version_info {!r}".format(sys.version_info))
print("remote info: {}".format(gw._rinfo()))
ch = gw.remote_exec(func, data=1)
result = ch.receive()
assert result == 1
def test_remote_exc__no_kwargs(makegateway):
gw = makegateway()
with pytest.raises(TypeError):
gw.remote_exec(gateway_base, kwarg=1)
with pytest.raises(TypeError):
gw.remote_exec("pass", kwarg=1)
@skip_win_pypy
def test_remote_exec_inspect_stack(makegateway):
gw = makegateway()
ch = gw.remote_exec(
"""
import inspect
inspect.stack()
import traceback
channel.send('\\n'.join(traceback.format_stack()))
"""
)
assert 'File "<remote exec>"' in ch.receive()
ch.waitclose()