Add datetime.* type checks, as @CAM-Gerlach suggested

Author: StSav012

qtpy/tests/test_qtcore.py

@@ -1,7 +1,7 @@
 """Test QtCore."""
 
 import sys
-from datetime import datetime
+from datetime import date, datetime, time
 
 import pytest
 
@@ -31,6 +31,7 @@ def test_QDateTime_toPython_and_toPyDateTime(method):
     """Test `QDateTime.toPython` and `QDateTime.toPyDateTime`"""
     q_datetime = QtCore.QDateTime(NOW)
     py_datetime = getattr(q_datetime, method)()
+    assert isinstance(py_datetime, datetime)
     assert py_datetime == NOW
 
 
@@ -39,6 +40,7 @@ def test_QDate_toPython_and_toPyDate(method):
     """Test `QDate.toPython` and `QDate.toPyDate`"""
     q_date = QtCore.QDateTime(NOW).date()
     py_date = getattr(q_date, method)()
+    assert isinstance(py_date, date)
     assert py_date == NOW.date()
 
 
@@ -47,6 +49,7 @@ def test_QTime_toPython_and_toPyTime(method):
     """Test `QTime.toPython` and `QTime.toPyTime`"""
     q_time = QtCore.QDateTime(NOW).time()
     py_time = getattr(q_time, method)()
+    assert isinstance(py_time, time)
     assert py_time == NOW.time()