Implement default __ne__ and __eq__ for all PySide types

PySide types have been following the Qt implementation of
comparisons, completely.

This is not correct for Python, because the Python default has
the operators `==` and `!=` at least. They are needed for tests
like `obj in collection`.

We fix this by redirecting the default case to
`PyBaseObject_Type.tp_richcompare`.
This is the correct way to fix it, because for types which do not
define `tp_richcompare', this is the default, anyway.

From the original patch, the test case is still in use.

Old message:
Implement __ne__ and __eq__ for QTreeWidgetItem

Testing if a QTreeWidgetItem belongs to a list raises a NotImplementedError.
I have exposed the operator== and the operator!= from C++ to shiboken which has solved our eq operator issue.
Implemented the test from PYSIDE-74 for the QTreeWidgetItem eq operator and the ne operator.
This also allows us to have the behavior "QTreeWidgetItem in ['a']" and "QTreeWidgetItem not in ['a']".
Adding qtreewidgetitem_test.py to CMakeFiles.txt

Fixes: PYSIDE-74
Change-Id: Id221c0163fc8c2d85730c4c26f22db5f61710706
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>

1 files changed, 3 insertions, 0 deletions

diff --git a/sources/shiboken2/libshiboken/basewrapper.h b/sources/shiboken2/libshiboken/basewrapper.h
index b233c02b4..267759daa 100644
--- a/sources/shiboken2/libshiboken/basewrapper.h
+++ b/sources/shiboken2/libshiboken/basewrapper.h
@@ -135,6 +135,9 @@ LIBSHIBOKEN_API PyObject *SbkDummyNew(PyTypeObject *type, PyObject *, PyObject *
 LIBSHIBOKEN_API PyObject *SbkType_FromSpec(PyType_Spec *);
 LIBSHIBOKEN_API PyObject *SbkType_FromSpecWithBases(PyType_Spec *, PyObject *);
 
+/// PYSIDE-74: Fallback used in all types now.
+LIBSHIBOKEN_API PyObject *FallbackRichCompare(PyObject *self, PyObject *other, int op);
+
 } // extern "C"
 
 namespace Shiboken