136 lines
4.2 KiB
Python
136 lines
4.2 KiB
Python
"""Unittest for UndoDelegator in idlelib.undo.py.
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Coverage about 80% (retest).
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"""
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from test.support import requires
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requires('gui')
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import unittest
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from unittest.mock import Mock
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from tkinter import Text, Tk
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from idlelib.undo import UndoDelegator
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from idlelib.percolator import Percolator
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class UndoDelegatorTest(unittest.TestCase):
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@classmethod
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def setUpClass(cls):
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cls.root = Tk()
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cls.text = Text(cls.root)
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cls.percolator = Percolator(cls.text)
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@classmethod
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def tearDownClass(cls):
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cls.percolator.redir.close()
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del cls.percolator, cls.text
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cls.root.destroy()
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del cls.root
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def setUp(self):
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self.delegator = UndoDelegator()
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self.percolator.insertfilter(self.delegator)
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self.delegator.bell = Mock(wraps=self.delegator.bell)
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def tearDown(self):
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self.percolator.removefilter(self.delegator)
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self.text.delete('1.0', 'end')
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self.delegator.resetcache()
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def test_undo_event(self):
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text = self.text
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text.insert('insert', 'foobar')
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text.insert('insert', 'h')
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text.event_generate('<<undo>>')
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self.assertEqual(text.get('1.0', 'end'), '\n')
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text.insert('insert', 'foo')
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text.insert('insert', 'bar')
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text.delete('1.2', '1.4')
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text.insert('insert', 'hello')
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text.event_generate('<<undo>>')
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self.assertEqual(text.get('1.0', '1.4'), 'foar')
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text.event_generate('<<undo>>')
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self.assertEqual(text.get('1.0', '1.6'), 'foobar')
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text.event_generate('<<undo>>')
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self.assertEqual(text.get('1.0', '1.3'), 'foo')
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text.event_generate('<<undo>>')
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self.delegator.undo_event('event')
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self.assertTrue(self.delegator.bell.called)
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def test_redo_event(self):
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text = self.text
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text.insert('insert', 'foo')
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text.insert('insert', 'bar')
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text.delete('1.0', '1.3')
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text.event_generate('<<undo>>')
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text.event_generate('<<redo>>')
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self.assertEqual(text.get('1.0', '1.3'), 'bar')
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text.event_generate('<<redo>>')
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self.assertTrue(self.delegator.bell.called)
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def test_dump_event(self):
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"""
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Dump_event cannot be tested directly without changing
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environment variables. So, test statements in dump_event
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indirectly
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"""
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text = self.text
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d = self.delegator
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text.insert('insert', 'foo')
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text.insert('insert', 'bar')
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text.delete('1.2', '1.4')
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self.assertTupleEqual((d.pointer, d.can_merge), (3, True))
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text.event_generate('<<undo>>')
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self.assertTupleEqual((d.pointer, d.can_merge), (2, False))
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def test_get_set_saved(self):
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# test the getter method get_saved
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# test the setter method set_saved
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# indirectly test check_saved
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d = self.delegator
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self.assertTrue(d.get_saved())
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self.text.insert('insert', 'a')
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self.assertFalse(d.get_saved())
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d.saved_change_hook = Mock()
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d.set_saved(True)
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self.assertEqual(d.pointer, d.saved)
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self.assertTrue(d.saved_change_hook.called)
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d.set_saved(False)
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self.assertEqual(d.saved, -1)
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self.assertTrue(d.saved_change_hook.called)
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def test_undo_start_stop(self):
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# test the undo_block_start and undo_block_stop methods
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text = self.text
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text.insert('insert', 'foo')
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self.delegator.undo_block_start()
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text.insert('insert', 'bar')
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text.insert('insert', 'bar')
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self.delegator.undo_block_stop()
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self.assertEqual(text.get('1.0', '1.3'), 'foo')
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# test another code path
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self.delegator.undo_block_start()
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text.insert('insert', 'bar')
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self.delegator.undo_block_stop()
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self.assertEqual(text.get('1.0', '1.3'), 'foo')
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def test_addcmd(self):
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text = self.text
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# when number of undo operations exceeds max_undo
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self.delegator.max_undo = max_undo = 10
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for i in range(max_undo + 10):
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text.insert('insert', 'foo')
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self.assertLessEqual(len(self.delegator.undolist), max_undo)
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if __name__ == '__main__':
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unittest.main(verbosity=2, exit=False)
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