Viewing file:  test_window.py (1.42 KB) -rw-r--r--
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"""
Tests for the insults windowing module, L{twisted.conch.insults.window}.
"""
from twisted.trial.unittest import TestCase
from twisted.conch.insults.window import TopWindow
class TopWindowTests(TestCase):
"""
Tests for L{TopWindow}, the root window container class.
"""
def test_paintScheduling(self):
"""
Verify that L{TopWindow.repaint} schedules an actual paint to occur
using the scheduling object passed to its initializer.
"""
paints = []
scheduled = []
root = TopWindow(lambda: paints.append(None), scheduled.append)
# Nothing should have happened yet.
self.assertEqual(paints, [])
self.assertEqual(scheduled, [])
# Cause a paint to be scheduled.
root.repaint()
self.assertEqual(paints, [])
self.assertEqual(len(scheduled), 1)
# Do another one to verify nothing else happens as long as the previous
# one is still pending.
root.repaint()
self.assertEqual(paints, [])
self.assertEqual(len(scheduled), 1)
# Run the actual paint call.
scheduled.pop()()
self.assertEqual(len(paints), 1)
self.assertEqual(scheduled, [])
# Do one more to verify that now that the previous one is finished
# future paints will succeed.
root.repaint()
self.assertEqual(len(paints), 1)
self.assertEqual(len(scheduled), 1)
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