Skip Jupyter tests on Python 3 for Qt5

They currently segfault when importing readline. This seems
to be fixed for IPython 5

Starting it without stdin under Python 3 seems to cause
a segfault in readline.

qt/python/mantidqt/widgets/test/test_jupyterconsole.py

@@ -17,18 +17,26 @@
 from __future__ import (absolute_import)
 
 # system imports
+import sys
 import unittest
 
 # third-party library imports
+import IPython
+from qtpy import QT_VERSION
 
 # local package imports
 from mantidqt.widgets.jupyterconsole import InProcessJupyterConsole
 from mantidqt.utils.qt.testing import requires_qapp
 
 
+PRE_IPY5_PY3_QT5 = (sys.version_info.major == 3 and IPython.version_info[0] < 5 and int(QT_VERSION[0]) == 5)
+SKIP_REASON = "Segfault within readline for IPython < 5 and Python 3"
+
+
 @requires_qapp
 class InProcessJupyterConsoleTest(unittest.TestCase):
 
+    @unittest.skipIf(PRE_IPY5_PY3_QT5, SKIP_REASON)
     def test_construction_raises_no_errors(self):
         widget = InProcessJupyterConsole()
         self.assertTrue(hasattr(widget, "kernel_manager"))
@@ -36,16 +44,19 @@ class InProcessJupyterConsoleTest(unittest.TestCase):
         self.assertTrue(len(widget.banner) > 0)
         del widget
 
+    @unittest.skipIf(PRE_IPY5_PY3_QT5, SKIP_REASON)
     def test_construction_with_banner_replaces_default(self):
         widget = InProcessJupyterConsole(banner="Hello!")
         self.assertEquals("Hello!", widget.banner)
         del widget
 
+    @unittest.skipIf(PRE_IPY5_PY3_QT5, SKIP_REASON)
     def test_construction_with_startup_code_adds_to_banner_and_executes(self):
         widget = InProcessJupyterConsole(startup_code="x = 1")
         self.assertTrue("x = 1" in widget.banner)
         self.assertEquals(1, widget.kernel_manager.kernel.shell.user_ns['x'])
         del widget
 
+
 if __name__ == '__main__':
     unittest.main()