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# Copyright (c) 2016 Ultimaker B.V.
# Uranium is released under the terms of the LGPLv3 or higher.
import pytest
from UM.Signal import Signal, signalemitter
class SignalReceiver:
def __init__(self):
self._emit_count = 0
def getEmitCount(self):
return self._emit_count
def slot(self):
self._emit_count += 1
def test_signal():
test = SignalReceiver()
signal = Signal(type = Signal.Direct)
signal.connect(test.slot)
signal.emit()
assert test.getEmitCount() == 1
def test_signalemitter():
def declare_signalemitter():
@signalemitter
class Test:
testSignal = Signal()
return Test
cls = declare_signalemitter()
assert cls is not None
inst = cls()
assert cls is not None
assert hasattr(inst, "testSignal")
assert inst.testSignal != cls.testSignal
def declare_bad_signalemitter():
@signalemitter
class Test:
pass
return Test
with pytest.raises(TypeError):
declare_bad_signalemitter()
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