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class AppTestGreenlet:
spaceconfig = dict(usemodules=['_continuation'], continuation=True)
def test_simple(self):
from greenlet import greenlet
lst = []
def f():
lst.append(1)
greenlet.getcurrent().parent.switch()
lst.append(3)
g = greenlet(f)
lst.append(0)
g.switch()
lst.append(2)
g.switch()
lst.append(4)
assert lst == list(range(5))
def test_parent(self):
from greenlet import greenlet
gmain = greenlet.getcurrent()
assert gmain.parent is None
g = greenlet(lambda: None)
assert g.parent is gmain
def test_pass_around(self):
from greenlet import greenlet
seen = []
def f(x, y):
seen.append((x, y))
seen.append(greenlet.getcurrent().parent.switch())
seen.append(greenlet.getcurrent().parent.switch(42))
return 44, 'z'
g = greenlet(f)
seen.append(g.switch(40, 'x'))
seen.append(g.switch(41, 'y'))
seen.append(g.switch(43))
#
def f2():
return 45
g = greenlet(f2)
seen.append(g.switch())
#
def f3():
pass
g = greenlet(f3)
seen.append(g.switch())
#
assert seen == [(40, 'x'), (), (41, 'y'), 42, 43, (44, 'z'), 45, None]
def test_exception_simple(self):
from greenlet import greenlet
#
def fmain():
raise ValueError
#
g1 = greenlet(fmain)
raises(ValueError, g1.switch)
def test_dead(self):
from greenlet import greenlet
#
def fmain():
assert g1 and not g1.dead
#
g1 = greenlet(fmain)
assert not g1 and not g1.dead
g1.switch()
assert not g1 and g1.dead
#
gmain = greenlet.getcurrent()
assert gmain and not gmain.dead
def test_GreenletExit(self):
from greenlet import greenlet, GreenletExit
#
def fmain(*args):
raise GreenletExit(*args)
#
g1 = greenlet(fmain)
res = g1.switch('foo', 'bar')
assert isinstance(res, GreenletExit) and res.args == ('foo', 'bar')
def test_throw_1(self):
from greenlet import greenlet
gmain = greenlet.getcurrent()
#
def f():
try:
gmain.switch()
except ValueError:
return "ok"
#
g = greenlet(f)
g.switch()
res = g.throw(ValueError)
assert res == "ok"
def test_throw_2(self):
from greenlet import greenlet
gmain = greenlet.getcurrent()
#
def f():
gmain.throw(ValueError)
#
g = greenlet(f)
raises(ValueError, g.switch)
def test_throw_3(self):
from greenlet import greenlet
gmain = greenlet.getcurrent()
raises(ValueError, gmain.throw, ValueError)
def test_throw_4(self):
from greenlet import greenlet
gmain = greenlet.getcurrent()
#
def f1():
g2.throw(ValueError)
#
def f2():
try:
gmain.switch()
except ValueError:
return "ok"
#
g1 = greenlet(f1)
g2 = greenlet(f2)
g2.switch()
res = g1.switch()
assert res == "ok"
def test_throw_GreenletExit(self):
from greenlet import greenlet
gmain = greenlet.getcurrent()
l = [0]
#
def func():
l[0] += 1
gmain.switch()
l[0] += 1
#
g = greenlet(func)
g.switch()
assert l[0] == 1
g.throw()
assert l[0] == 1
def test_throw_GreenletExit_result(self):
from greenlet import greenlet
gmain = greenlet.getcurrent()
l = [0]
#
def func():
l[0] += 1
gmain.switch()
l[0] += 1
#
g = greenlet(func)
g.switch()
assert l[0] == 1
ge1 = greenlet.GreenletExit(1, 2, 3)
ge2 = g.throw(ge1)
assert l[0] == 1
assert ge1 is ge2
def test_nondefault_parent(self):
from greenlet import greenlet
#
def f1():
g2 = greenlet(f2)
res = g2.switch()
assert res == "from 2"
return "from 1"
#
def f2():
return "from 2"
#
g1 = greenlet(f1)
res = g1.switch()
assert res == "from 1"
def test_change_parent(self):
from greenlet import greenlet
#
def f1():
res = g2.switch()
assert res == "from 2"
return "from 1"
#
def f2():
return "from 2"
#
g1 = greenlet(f1)
g2 = greenlet(f2)
g2.parent = g1
res = g1.switch()
assert res == "from 1"
def test_raises_through_parent_chain(self):
from greenlet import greenlet
#
def f1():
raises(IndexError, g2.switch)
raise ValueError
#
def f2():
raise IndexError
#
g1 = greenlet(f1)
g2 = greenlet(f2)
g2.parent = g1
raises(ValueError, g1.switch)
def test_switch_to_dead_1(self):
from greenlet import greenlet
#
def f1():
return "ok"
#
g1 = greenlet(f1)
res = g1.switch()
assert res == "ok"
res = g1.switch("goes to gmain instead")
assert res == "goes to gmain instead"
def test_switch_to_dead_2(self):
from greenlet import greenlet
#
def f1():
g2 = greenlet(f2)
return g2.switch()
#
def f2():
return "ok"
#
g1 = greenlet(f1)
res = g1.switch()
assert res == "ok"
res = g1.switch("goes to gmain instead")
assert res == "goes to gmain instead"
def test_switch_to_dead_3(self):
from greenlet import greenlet
gmain = greenlet.getcurrent()
#
def f1():
res = g2.switch()
assert res == "ok"
res = gmain.switch("next step")
assert res == "goes to f1 instead"
return "all ok"
#
def f2():
return "ok"
#
g1 = greenlet(f1)
g2 = greenlet(f2)
g2.parent = g1
res = g1.switch()
assert res == "next step"
res = g2.switch("goes to f1 instead")
assert res == "all ok"
def test_throw_in_not_started_yet(self):
from greenlet import greenlet
#
def f1():
never_reached
#
g1 = greenlet(f1)
raises(ValueError, g1.throw, ValueError)
assert g1.dead
def test_exc_info_save_restore(self):
# sys.exc_info save/restore behaviour is wrong on CPython's greenlet
from greenlet import greenlet
import sys
def f():
try:
raise ValueError('fun')
except:
exc_info = sys.exc_info()
greenlet(h).switch()
assert exc_info == sys.exc_info()
def h():
assert sys.exc_info() == (None, None, None)
greenlet(f).switch()
def test_exc_info_save_restore2(self):
import sys
from greenlet import greenlet
result = []
def f():
result.append(sys.exc_info())
g = greenlet(f)
try:
1 / 0
except ZeroDivisionError:
g.switch()
assert result == [(None, None, None)]
def test_gr_frame(self):
from greenlet import greenlet
import sys
def f2():
assert g.gr_frame is None
gmain.switch()
assert g.gr_frame is None
def f1():
assert gmain.gr_frame is gmain_frame
assert g.gr_frame is None
f2()
assert g.gr_frame is None
gmain = greenlet.getcurrent()
assert gmain.gr_frame is None
gmain_frame = sys._getframe()
g = greenlet(f1)
assert g.gr_frame is None
g.switch()
assert g.gr_frame.f_code.co_name == 'f2'
g.switch()
assert g.gr_frame is None
def test_override_nonzero(self):
from greenlet import greenlet
class G(greenlet):
def __nonzero__(self):
raise ValueError
g = G(lambda: 42)
x = g.switch()
assert x == 42
def test_kwargs_to_f(self):
import greenlet
seen = []
def f(*args, **kwds):
seen.append([args, kwds])
g = greenlet.greenlet(f)
g.switch(1, 2, x=3, y=4)
assert seen == [[(1, 2), {'x': 3, 'y': 4}]]
def test_kwargs_to_switch(self):
import greenlet
main = greenlet.getcurrent()
assert main.switch() == ()
assert main.switch(5) == 5
assert main.switch(5, 6) == (5, 6)
#
assert main.switch(x=5) == {'x': 5}
assert main.switch(x=5, y=6) == {'x': 5, 'y': 6}
assert main.switch(3, x=5) == ((3,), {'x': 5})
assert main.switch(3, x=5, y=6) == ((3,), {'x': 5, 'y': 6})
assert main.switch(2, 3, x=6) == ((2, 3), {'x': 6})
def test_throw_GreenletExit_not_started(self):
import greenlet
def f():
never_executed
g = greenlet.greenlet(f)
e = greenlet.GreenletExit()
x = g.throw(e)
assert x is e
def test_throw_GreenletExit_already_finished(self):
import greenlet
def f():
pass
g = greenlet.greenlet(f)
g.switch()
e = greenlet.GreenletExit()
x = g.throw(e)
assert x is e
def test_throw_exception_already_finished(self):
import greenlet
def f():
pass
g = greenlet.greenlet(f)
g.switch()
seen = []
class MyException(Exception):
def __init__(self):
seen.append(1)
try:
g.throw(MyException)
except MyException:
pass
else:
raise AssertionError("no exception??")
assert seen == [1]
|
