7013: Impl. User.prompt based on QuestionDialog2

Implemented prompt method, changed signature
to match QuestionDialog2.__init__

Refactored existing code in User classes:
common __init__ code and User.callback pulled up to gen.user

Aligned gui and cli to use stderr for spinner and
progress printouts

For testability, self._fileout attr is used instead
of hardwired stderr/stdout, this is
    add gui test (empty for now)

The new code (prompt) is not excercised anywhere but
in the unit tests yet, this is preparation work for other
items in bug #5598

svn: r22914

gramps/gen/test/user_test.py

@@ -0,0 +1,46 @@
+# -*- coding: utf-8 -*-
+#
+# Gramps - a GTK+/GNOME based genealogy program
+#
+# Copyright (C) 2013 Vassilii Khachaturov <vassilii@tarunz.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, 
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+
+# $Id$
+
+""" Unittest for user.py """
+
+from __future__ import print_function
+
+import unittest
+from .. import user
+
+class TestUser(object):
+    TITLE = "Testing prompt"
+    MSG = "Choices are hard. Nevertheless, please choose!"
+    ACCEPT = "To be"
+    REJECT = "Not to be"
+
+class TestUser_prompt(unittest.TestCase):
+    def setUp(self):
+        self.user = user.User()
+
+    def test_returns_False(self):
+        assert not self.user.prompt(
+                TestUser.TITLE, TestUser.MSG, TestUser.ACCEPT, TestUser.REJECT)
+
+if __name__ == "__main__":
+    unittest.main()