PySide6/QSignalSpy: Add constructor taking a signal

Task-number: PYSIDE-1482
Change-Id: Ifb9061af1828e7348de3ad5407c830aeb7d4f386
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>
(cherry picked from commit d3388316c3ac87c19cc668d9b5bca2b988db74ca)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

4 files changed, 76 insertions, 0 deletions

diff --git a/sources/pyside6/PySide6/QtCore/typesystem_core_common.xml b/sources/pyside6/PySide6/QtCore/typesystem_core_common.xml
index 1a7e7b8d8..bec575e54 100644
--- a/sources/pyside6/PySide6/QtCore/typesystem_core_common.xml
+++ b/sources/pyside6/PySide6/QtCore/typesystem_core_common.xml
@@ -51,6 +51,8 @@
     <custom-type name="PyTypeObject"/>
     <custom-type name="PyUnicode"/>
     <custom-type name="list of QAbstractAnimation"/>
+    <custom-type name="PySideSignalInstance"
+                 check-function="PySide::Signal::checkInstanceType"/>
 <!--
     <function signature="qChecksum(QByteArrayView data, Qt::ChecksumType)"/>
 -->
diff --git a/sources/pyside6/PySide6/QtTest/typesystem_test.xml b/sources/pyside6/PySide6/QtTest/typesystem_test.xml
index 20dcf3672..ea480bbf2 100644
--- a/sources/pyside6/PySide6/QtTest/typesystem_test.xml
+++ b/sources/pyside6/PySide6/QtTest/typesystem_test.xml
@@ -107,9 +107,18 @@
   </object-type>
 
   <object-type name="QSignalSpy"> <!-- Inherits QList<QVariantList> -->
+      <extra-includes>
+          <include file-name="pysidesignal.h" location="global"/>
+      </extra-includes>
       <declare-function signature="count()const" return-type="qsizetype"/>
       <declare-function signature="size()const" return-type="qsizetype"/>
       <declare-function signature="at(qsizetype)const" return-type="QVariantList"/>
+      <add-function signature="QSignalSpy(PySideSignalInstance@signal@)">
+          <inject-code class="target" position="beginning" file="../glue/qttest.cpp" snippet="qsignalspy-signal"/>
+          <inject-documentation format="target" mode="append">
+          Constructs a new QSignalSpy that listens for emissions of the signal.
+          </inject-documentation>
+      </add-function>
   </object-type>
 
   <namespace-type name="QTest">
diff --git a/sources/pyside6/PySide6/glue/qttest.cpp b/sources/pyside6/PySide6/glue/qttest.cpp
new file mode 100644
index 000000000..4fea0a98c
--- /dev/null
+++ b/sources/pyside6/PySide6/glue/qttest.cpp
@@ -0,0 +1,60 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt for Python.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*********************************************************************
+ * INJECT CODE
+ ********************************************************************/
+
+// @snippet qsignalspy-signal
+auto *signalInst = reinterpret_cast<PySideSignalInstance *>(%PYARG_1);
+PyObject *emitterPyObject = PySide::Signal::getObject(signalInst);
+QObject* emitter = %CONVERTTOCPP[QObject *](emitterPyObject);
+QByteArray signature = PySide::Signal::getSignature(signalInst);
+if (!signature.isEmpty())
+    signature.prepend('2'); // SIGNAL() macro
+
+if (emitter == nullptr || signature.isEmpty()) {
+    QByteArray error = QByteArrayLiteral("Wrong parameter (")
+        + (%PYARG_1)->ob_type->tp_name
+        + QByteArrayLiteral(") passed, QSignalSpy requires a signal.");
+    PyErr_SetString(PyExc_ValueError, error.constData());
+    return -1;
+}
+%0 = new QSignalSpyWrapper(emitter, signature.constData());
+// @snippet qsignalspy-signal
diff --git a/sources/pyside6/tests/QtTest/qsignalspy_test.py b/sources/pyside6/tests/QtTest/qsignalspy_test.py
index 4e5786ed6..aa1b65bfa 100644
--- a/sources/pyside6/tests/QtTest/qsignalspy_test.py
+++ b/sources/pyside6/tests/QtTest/qsignalspy_test.py
@@ -57,6 +57,11 @@ class QSignalSpyTest(UsesQApplication):
         self._model.item(0, 0).setText('text2')
         self.assertEqual(spy.count(), 1)
 
+    def testSignal(self):
+        spy = QSignalSpy(self._model.dataChanged)
+        self._model.item(0, 0).setText('text3')
+        self.assertEqual(spy.count(), 1)
+
 
 if __name__ == '__main__':
     unittest.main()