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import inspect
import os
import sys
import unittest

from pathlib import Path
sys.path.append(os.fspath(Path(__file__).resolve().parents[1]))
from init_paths import init_test_paths
init_test_paths(False)

import PySide6.QtCore
import PySide6.QtWidgets


class PySideSignatureTest(unittest.TestCase):
    def testSignatureExist(self):
        t1 = type(PySide6.QtCore.QObject.children.__signature__)
        self.assertEqual(t1, inspect.Signature)
        t2 = type(PySide6.QtCore.QObject.__dict__["children"].__signature__)
        self.assertEqual(t2, t1)
        obj = PySide6.QtWidgets.QApplication.palette
        t3 = type(obj.__signature__)
        self.assertEqual(t3, list)
        self.assertEqual(len(obj.__signature__), 3)
        for thing in obj.__signature__:
            self.assertEqual(type(thing), inspect.Signature)
        sm = PySide6.QtWidgets.QApplication.__dict__["palette"]
        self.assertFalse(callable(sm))
        self.assertEqual(sm.__func__, obj)
        self.assertTrue(hasattr(sm, "__signature__") and
                        sm.__signature__ is not None)

    def testSignatureIsCached(self):
        # see if we get the same object
        ob1 = PySide6.QtCore.QObject.children.__signature__
        ob2 = PySide6.QtCore.QObject.children.__signature__
        self.assertTrue(ob1 is ob2)
        # same with multi signature
        ob1 = PySide6.QtWidgets.QApplication.palette.__signature__
        ob2 = PySide6.QtWidgets.QApplication.palette.__signature__
        self.assertTrue(ob1 is ob2)

    def testModuleIsInitialized(self):
        self.assertTrue(PySide6.QtWidgets.QApplication.__signature__ is not None)

    def test_NotCalled_is_callable_and_correct(self):
        # A signature that has a default value with some "Default(...)"
        # wrapper is callable and creates an object of the right type.
        sig = PySide6.QtCore.QByteArray().toPercentEncoding.__signature__
        called_default = sig.parameters["exclude"].default()
        self.assertEqual(type(called_default), PySide6.QtCore.QByteArray)


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