# -*- coding: utf-8 -*-

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## This file is part of the test suite of PySide2.
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'''Test case for signal signature received by QObject::connectNotify().'''

import unittest
from PySide2.QtCore import *
from helper import UsesQCoreApplication

called = False
name = "Old"
class Obj(QObject):
    dummySignalArgs = Signal(str)
    numberSignal = Signal(int)
    def __init__(self):
        QObject.__init__(self)
        self.signal = ''

    def connectNotify(self, signal):
        self.signal = signal

    @staticmethod
    def static_method():
        global called
        called = True

    @staticmethod
    def static_method_args(arg="default"):
        global name
        name = arg

def callback(arg=None):
    pass
def callback_empty():
    pass

class TestConnectNotifyWithNewStyleSignals(UsesQCoreApplication):
    '''Test case for signal signature received by QObject::connectNotify().'''

    def testOldStyle(self):
        sender = Obj()
        receiver = QObject()
        sender.connect(SIGNAL('destroyed()'), receiver, SLOT('deleteLater()'))
        # When connecting to a regular slot, and not a python callback function, QObject::connect
        # will use the non-cloned method signature, so connectinc to destroyed() will actually
        # connect to destroyed(QObject*).
        self.assertEqual(sender.signal.methodSignature(), 'destroyed(QObject*)')

    def testOldStyleWithPythonCallback(self):
        sender = Obj()
        sender.connect(SIGNAL('destroyed()'), callback)
        self.assertEqual(sender.signal.methodSignature(), 'destroyed()')

    def testNewStyle(self):
        sender = Obj()

        sender.destroyed.connect(callback_empty)
        self.assertEqual(sender.signal.methodSignature(), 'destroyed()')

        sender.destroyed[QObject].connect(callback)
        self.assertEqual(sender.signal.methodSignature(), 'destroyed(QObject*)')

    def testStaticSlot(self):
        global called
        sender = Obj()
        sender.connect(sender, SIGNAL("dummySignal()"), Obj.static_method)
        sender.emit(SIGNAL("dummySignal()"))
        self.assertTrue(called)


    def testStaticSlotArgs(self):
        global name
        sender = Obj()
        sender.dummySignalArgs.connect(Obj.static_method_args)
        sender.dummySignalArgs[str].emit("New")
        self.assertEqual(name, "New")

    def testLambdaSlot(self):
        sender = Obj()
        sender.numberSignal[int].connect(lambda x: 42)
        with self.assertRaises(IndexError):
            sender.numberSignal[str].emit("test")


if __name__ == '__main__':
    unittest.main()