Reduce the redundant signature_test

The file signature_test.py contained together with basic signature property
tests also an early form of the existence test, which is meanwhile
implemented in pyside2/tests/registry/existence_test.py .

This part is redundant in signature_test.py, and we remove it. The basic
signature tests stay, and the module is degraded from registry to a normal
test module in pyside2/tests/QtWidgets .

Remark: This simplification was found when I was finishing the
signature documentation. Instead of describing the intermediate state
of the module, it was more straight-forward to remove the duplication.

Task-number: PYSIDE-510
Change-Id: I7fbf65d6d2803926dc00485f1e82349912742942
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

2 files changed, 88 insertions, 0 deletions

diff --git a/sources/pyside2/tests/QtWidgets/CMakeLists.txt b/sources/pyside2/tests/QtWidgets/CMakeLists.txt
index 36f1ba80a..6d8645918 100644
--- a/sources/pyside2/tests/QtWidgets/CMakeLists.txt
+++ b/sources/pyside2/tests/QtWidgets/CMakeLists.txt
@@ -134,6 +134,7 @@ PYSIDE_TEST(qwidget_setlayout_test.py)
 PYSIDE_TEST(qwidget_test.py)
 PYSIDE_TEST(qcolormap_test.py)
 PYSIDE_TEST(reference_count_test.py)
+PYSIDE_TEST(signature_test.py)
 PYSIDE_TEST(standardpixmap_test.py)
 PYSIDE_TEST(test_module_template.py)
 PYSIDE_TEST(virtual_protected_inheritance_test.py)
diff --git a/sources/pyside2/tests/QtWidgets/signature_test.py b/sources/pyside2/tests/QtWidgets/signature_test.py
new file mode 100644
index 000000000..15a9333b4
--- /dev/null
+++ b/sources/pyside2/tests/QtWidgets/signature_test.py
@@ -0,0 +1,87 @@
+#############################################################################
+##
+## Copyright (C) 2017 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.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+from __future__ import print_function, absolute_import
+
+import unittest
+import PySide2.QtCore
+import PySide2.QtWidgets
+from PySide2.support.signature import inspect
+
+
+class PySideSignatureTest(unittest.TestCase):
+    def testSignatureExist(self):
+        t1 = type(PySide2.QtCore.QObject.children.__signature__)
+        self.assertEqual(t1, inspect.Signature)
+        t2 = type(PySide2.QtCore.QObject.__dict__["children"].__signature__)
+        self.assertEqual(t2, t1)
+        obj = PySide2.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 = PySide2.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 = PySide2.QtCore.QObject.children.__signature__
+        ob2 = PySide2.QtCore.QObject.children.__signature__
+        self.assertTrue(ob1 is ob2)
+        # same with multi signature
+        ob1 = PySide2.QtWidgets.QApplication.palette.__signature__
+        ob2 = PySide2.QtWidgets.QApplication.palette.__signature__
+        self.assertTrue(ob1 is ob2)
+
+    def testModuleIsInitialized(self):
+        self.assertTrue(PySide2.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 = PySide2.QtCore.QByteArray().toPercentEncoding.__signature__
+        called_default = sig.parameters["exclude"].default()
+        self.assertEqual(type(called_default), PySide2.QtCore.QByteArray)
+
+if __name__ == "__main__":
+    unittest.main()