PyPySide: replace the __signature__ attribute by get_signature()

In PyPy, types cannot simply be patched. It would be
quite some effort to derive extra heap types for that.

Instead, we use `get_signature()` for all tests, which
has the same effect.

Task-number: PYSIDE-535
Change-Id: I8d9e4adcfc33231d0cd96260feaf2b205bef9a18
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>

7 files changed, 45 insertions, 21 deletions

diff --git a/sources/pyside6/tests/QtWidgets/signature_test.py b/sources/pyside6/tests/QtWidgets/signature_test.py
index c507c2ca7..4955c6b41 100644
--- a/sources/pyside6/tests/QtWidgets/signature_test.py
+++ b/sources/pyside6/tests/QtWidgets/signature_test.py
@@ -49,44 +49,44 @@ init_test_paths(False)
 
 import PySide6.QtCore
 import PySide6.QtWidgets
+from PySide6.support.signature import get_signature
 
 
 class PySideSignatureTest(unittest.TestCase):
     def testSignatureExist(self):
-        t1 = type(PySide6.QtCore.QObject.children.__signature__)
+        t1 = type(get_signature(PySide6.QtCore.QObject.children))
         self.assertEqual(t1, inspect.Signature)
-        t2 = type(PySide6.QtCore.QObject.__dict__["children"].__signature__)
+        t2 = type(get_signature(PySide6.QtCore.QObject.__dict__["children"]))
         self.assertEqual(t2, t1)
         obj = PySide6.QtWidgets.QApplication.palette
-        t3 = type(obj.__signature__)
+        t3 = type(get_signature(obj))
         self.assertEqual(t3, list)
-        self.assertEqual(len(obj.__signature__), 3)
-        for thing in obj.__signature__:
+        self.assertEqual(len(get_signature(obj)), 3)
+        for thing in get_signature(obj):
             self.assertEqual(type(thing), inspect.Signature)
         sm = PySide6.QtWidgets.QApplication.__dict__["palette"]
         # PYSIDE-1436: staticmethod is a callable since Python 3.10
         # Instead of checking callable(sm), we check the type:
         self.assertEqual(type(sm), staticmethod)
-        self.assertTrue(hasattr(sm, "__signature__") and
-                        sm.__signature__ is not None)
+        self.assertTrue(get_signature(sm) 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__
+        ob1 = get_signature(PySide6.QtCore.QObject.children)
+        ob2 = get_signature(PySide6.QtCore.QObject.children)
         self.assertTrue(ob1 is ob2)
         # same with multi signature
-        ob1 = PySide6.QtWidgets.QApplication.palette.__signature__
-        ob2 = PySide6.QtWidgets.QApplication.palette.__signature__
+        ob1 = get_signature(PySide6.QtWidgets.QApplication.palette)
+        ob2 = get_signature(PySide6.QtWidgets.QApplication.palette)
         self.assertTrue(ob1 is ob2)
 
     def testModuleIsInitialized(self):
-        self.assertTrue(PySide6.QtWidgets.QApplication.__signature__ is not None)
+        self.assertTrue(get_signature(PySide6.QtWidgets.QApplication) 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__
+        sig = get_signature(PySide6.QtCore.QByteArray().toPercentEncoding)
         called_default = sig.parameters["exclude"].default()
         self.assertEqual(type(called_default), PySide6.QtCore.QByteArray)
 
diff --git a/sources/pyside6/tests/pysidetest/new_inherited_functions_test.py b/sources/pyside6/tests/pysidetest/new_inherited_functions_test.py
index 95bf0615f..210ac9178 100644
--- a/sources/pyside6/tests/pysidetest/new_inherited_functions_test.py
+++ b/sources/pyside6/tests/pysidetest/new_inherited_functions_test.py
@@ -36,6 +36,7 @@ from init_paths import init_test_paths
 init_test_paths(False)
 
 from PySide6 import *
+from PySide6.support.signature import get_signature
 for modname, mod in sys.modules.items():
     # Python 2 leaves "None" in the dict.
     if modname.startswith("PySide6.") and mod is not None:
@@ -175,7 +176,7 @@ class MainTest(unittest.TestCase):
         except AttributeError:
             unittest.TestCase().skipTest("this test makes only sense if QtWidgets is available.")
 
-        sigs = PySide6.QtWidgets.QApplication.palette.__signature__
+        sigs = get_signature(PySide6.QtWidgets.QApplication.palette)
         self.assertEqual(len(sigs), 3)
 
 
diff --git a/sources/shiboken6/tests/otherbinding/signature_test.py b/sources/shiboken6/tests/otherbinding/signature_test.py
index 9f94edd34..3160ce5fa 100644
--- a/sources/shiboken6/tests/otherbinding/signature_test.py
+++ b/sources/shiboken6/tests/otherbinding/signature_test.py
@@ -43,12 +43,18 @@ init_paths()
 from other import OtherObjectType
 from shiboken_test_helper import objectFullname
 
+from shiboken6 import Shiboken
+_init_pyside_extension()   # trigger bootstrap
+
+from shibokensupport.signature import get_signature
+
+
 class SignatureTest(unittest.TestCase):
 
     # Check if the argument of 'OtherObjectType::enumAsInt(SampleNamespace::SomeClass::PublicScopedEnum value)'
     # has the correct representation
     def testNamespaceFromOtherModule(self):
-        argType = OtherObjectType.enumAsInt.__signature__.parameters['value'].annotation
+        argType = get_signature(OtherObjectType.enumAsInt).parameters['value'].annotation
         self.assertEqual(objectFullname(argType), 'sample.SampleNamespace.SomeClass.PublicScopedEnum')
 
 if __name__ == '__main__':
diff --git a/sources/shiboken6/tests/samplebinding/enumfromremovednamespace_test.py b/sources/shiboken6/tests/samplebinding/enumfromremovednamespace_test.py
index 72705c4c4..f9cbdf20d 100644
--- a/sources/shiboken6/tests/samplebinding/enumfromremovednamespace_test.py
+++ b/sources/shiboken6/tests/samplebinding/enumfromremovednamespace_test.py
@@ -41,6 +41,11 @@ init_paths()
 import sample
 from shiboken_test_helper import objectFullname
 
+from shiboken6 import Shiboken
+_init_pyside_extension()   # trigger bootstrap
+
+from shibokensupport.signature import get_signature
+
 
 class TestEnumFromRemovedNamespace(unittest.TestCase):
     def testEnumPromotedToGlobal(self):
@@ -59,10 +64,10 @@ class TestEnumFromRemovedNamespace(unittest.TestCase):
                          "sample.ObjectOnInvisibleNamespace")
 
         # Function arguments
-        signature = sample.ObjectOnInvisibleNamespace.toInt.__signature__
+        signature = get_signature(sample.ObjectOnInvisibleNamespace.toInt)
         self.assertEqual(objectFullname(signature.parameters['e'].annotation),
                          "sample.RemovedNamespace1_Enum")
-        signature = sample.ObjectOnInvisibleNamespace.consume.__signature__
+        signature = get_signature(sample.ObjectOnInvisibleNamespace.consume)
         self.assertEqual(objectFullname(signature.parameters['other'].annotation),
                          "sample.ObjectOnInvisibleNamespace")
 
diff --git a/sources/shiboken6/tests/samplebinding/namespace_test.py b/sources/shiboken6/tests/samplebinding/namespace_test.py
index 3dc79fa96..ca6d2bf39 100644
--- a/sources/shiboken6/tests/samplebinding/namespace_test.py
+++ b/sources/shiboken6/tests/samplebinding/namespace_test.py
@@ -43,6 +43,10 @@ init_paths()
 from sample import *
 from shiboken_test_helper import objectFullname
 
+from shiboken6 import Shiboken
+_init_pyside_extension()   # trigger bootstrap
+
+from shibokensupport.signature import get_signature
 
 # For tests of invisible namespaces, see
 # enumfromremovednamespace_test.py / removednamespaces.h
@@ -79,9 +83,9 @@ class TestClassesUnderNamespace(unittest.TestCase):
             "<class 'sample.SampleNamespace.SomeClass.SomeInnerClass.OkThisIsRecursiveEnough.NiceEnum'>")
 
         # Test if enum inside of class is correct represented
-        self.assertEqual(objectFullname(SampleNamespace.enumInEnumOut.__signature__.parameters['in_'].annotation),
+        self.assertEqual(objectFullname(get_signature(SampleNamespace.enumInEnumOut).parameters['in_'].annotation),
             "sample.SampleNamespace.InValue")
-        self.assertEqual(objectFullname(SampleNamespace.enumAsInt.__signature__.parameters['value'].annotation),
+        self.assertEqual(objectFullname(get_signature(SampleNamespace.enumAsInt).parameters['value'].annotation),
             "sample.SampleNamespace.SomeClass.PublicScopedEnum")
 
 
diff --git a/sources/shiboken6/tests/samplebinding/pointerprimitivetype_test.py b/sources/shiboken6/tests/samplebinding/pointerprimitivetype_test.py
index ad3bd899a..a1ee230ce 100644
--- a/sources/shiboken6/tests/samplebinding/pointerprimitivetype_test.py
+++ b/sources/shiboken6/tests/samplebinding/pointerprimitivetype_test.py
@@ -56,6 +56,8 @@ from sample import IntArray2, VirtualMethods
 
 import shiboken6
 _init_pyside_extension()   # trigger init, which does not happen in tests
+from shibokensupport.signature import get_signature
+
 import typing
 
 
@@ -75,7 +77,7 @@ class PointerPrimitiveTypeTest(unittest.TestCase):
 
     def testReturnVarSignature(self):
         # signature="getMargins(int*,int*,int*,int*)const">
-        ann = VirtualMethods.getMargins.__signature__.return_annotation
+        ann = get_signature(VirtualMethods.getMargins).return_annotation
         self.assertEqual(ann, typing.Tuple[int, int, int, int])
 
 
diff --git a/sources/shiboken6/tests/samplebinding/renaming_test.py b/sources/shiboken6/tests/samplebinding/renaming_test.py
index a31dceb35..32467c025 100644
--- a/sources/shiboken6/tests/samplebinding/renaming_test.py
+++ b/sources/shiboken6/tests/samplebinding/renaming_test.py
@@ -43,6 +43,12 @@ init_paths()
 
 from sample import RenamedValue, RenamedUser
 
+from shiboken6 import Shiboken
+_init_pyside_extension()   # trigger bootstrap
+
+from shibokensupport.signature import get_signature
+
+
 class RenamingTest(unittest.TestCase):
     def test(self):
         '''Tests whether the C++ class ToBeRenamedValue renamed via attribute
@@ -54,7 +60,7 @@ class RenamingTest(unittest.TestCase):
                          "<class 'sample.RenamedValue'>")
         rename_user = RenamedUser()
         rename_user.useRenamedValue(renamed_value)
-        actual_signature = str(rename_user.useRenamedValue.__signature__)
+        actual_signature = str(get_signature(rename_user.useRenamedValue))
         self.assertTrue(re.match(r"^\(self,\s*?v:\s*?sample.RenamedValue\)\s*?->\s*?None$",
                                  actual_signature))