def test_setIDFunction(self):
"""
L{util.setIDFunction} returns the last value passed to it.
"""
value = object()
previous = util.setIDFunction(value)
result = util.setIDFunction(previous)
self.assertIdentical(value, result)
def test_unsignedID(self):
"""
L{util.unsignedID} uses the function passed to L{util.setIDFunction} to
determine the unique integer id of an object and then adjusts it to be
positive if necessary.
"""
foo = object()
bar = object()
# A fake object identity mapping
objects = {foo: 17, bar: -73}
def fakeId(obj):
return objects[obj]
util.setIDFunction(fakeId)
self.assertEqual(util.unsignedID(foo), 17)
self.assertEqual(util.unsignedID(bar), (sys.maxsize + 1) * 2 - 73)
def test_str(self):
"""
The string representation of a L{DelayedCall} instance, as returned by
C{str}, includes the unsigned id of the instance, as well as its state,
the function to be called, and the function arguments.
"""
dc = DelayedCall(12, nothing, (3, ), {"A": 5}, None, None, lambda: 1.5)
ids = {dc: 200}
def fakeID(obj):
try:
return ids[obj]
except (TypeError, KeyError):
return id(obj)
self.addCleanup(setIDFunction, setIDFunction(fakeID))
self.assertEqual(
str(dc),
"<DelayedCall 0xc8 [10.5s] called=0 cancelled=0 nothing(3, A=5)>")
def test_unsignedID(self):
"""
L{unsignedID} is used to print ID of the object in case of error, not
standard ID value which can be negative.
"""
class X(BTBase):
breakRepr = True
ids = {X: 100}
def fakeID(obj):
try:
return ids[obj]
except (TypeError, KeyError):
return id(obj)
self.addCleanup(util.setIDFunction, util.setIDFunction(fakeID))
xRepr = reflect.safe_repr(X)
self.assertIn("0x64", xRepr)
def test_str(self):
"""
The string representation of a L{DelayedCall} instance, as returned by
C{str}, includes the unsigned id of the instance, as well as its state,
the function to be called, and the function arguments.
"""
dc = DelayedCall(12, nothing, (3, ), {"A": 5}, None, None, lambda: 1.5)
ids = {dc: 200}
def fakeID(obj):
try:
return ids[obj]
except (TypeError, KeyError):
return id(obj)
self.addCleanup(setIDFunction, setIDFunction(fakeID))
self.assertEqual(
str(dc),
"<DelayedCall 0xc8 [10.5s] called=0 cancelled=0 nothing(3, A=5)>")