| "Test undo, coverage 77%." |
| # Only test UndoDelegator so far. |
| |
| from idlelib.undo import UndoDelegator |
| import unittest |
| from test.support import requires |
| requires('gui') |
| |
| from unittest.mock import Mock |
| from tkinter import Text, Tk |
| from idlelib.percolator import Percolator |
| |
| |
| class UndoDelegatorTest(unittest.TestCase): |
| |
| @classmethod |
| def setUpClass(cls): |
| cls.root = Tk() |
| cls.text = Text(cls.root) |
| cls.percolator = Percolator(cls.text) |
| |
| @classmethod |
| def tearDownClass(cls): |
| cls.percolator.redir.close() |
| del cls.percolator, cls.text |
| cls.root.destroy() |
| del cls.root |
| |
| def setUp(self): |
| self.delegator = UndoDelegator() |
| self.delegator.bell = Mock() |
| self.percolator.insertfilter(self.delegator) |
| |
| def tearDown(self): |
| self.percolator.removefilter(self.delegator) |
| self.text.delete('1.0', 'end') |
| self.delegator.resetcache() |
| |
| def test_undo_event(self): |
| text = self.text |
| |
| text.insert('insert', 'foobar') |
| text.insert('insert', 'h') |
| text.event_generate('<<undo>>') |
| self.assertEqual(text.get('1.0', 'end'), '\n') |
| |
| text.insert('insert', 'foo') |
| text.insert('insert', 'bar') |
| text.delete('1.2', '1.4') |
| text.insert('insert', 'hello') |
| text.event_generate('<<undo>>') |
| self.assertEqual(text.get('1.0', '1.4'), 'foar') |
| text.event_generate('<<undo>>') |
| self.assertEqual(text.get('1.0', '1.6'), 'foobar') |
| text.event_generate('<<undo>>') |
| self.assertEqual(text.get('1.0', '1.3'), 'foo') |
| text.event_generate('<<undo>>') |
| self.delegator.undo_event('event') |
| self.assertTrue(self.delegator.bell.called) |
| |
| def test_redo_event(self): |
| text = self.text |
| |
| text.insert('insert', 'foo') |
| text.insert('insert', 'bar') |
| text.delete('1.0', '1.3') |
| text.event_generate('<<undo>>') |
| text.event_generate('<<redo>>') |
| self.assertEqual(text.get('1.0', '1.3'), 'bar') |
| text.event_generate('<<redo>>') |
| self.assertTrue(self.delegator.bell.called) |
| |
| def test_dump_event(self): |
| """ |
| Dump_event cannot be tested directly without changing |
| environment variables. So, test statements in dump_event |
| indirectly |
| """ |
| text = self.text |
| d = self.delegator |
| |
| text.insert('insert', 'foo') |
| text.insert('insert', 'bar') |
| text.delete('1.2', '1.4') |
| self.assertTupleEqual((d.pointer, d.can_merge), (3, True)) |
| text.event_generate('<<undo>>') |
| self.assertTupleEqual((d.pointer, d.can_merge), (2, False)) |
| |
| def test_get_set_saved(self): |
| # test the getter method get_saved |
| # test the setter method set_saved |
| # indirectly test check_saved |
| d = self.delegator |
| |
| self.assertTrue(d.get_saved()) |
| self.text.insert('insert', 'a') |
| self.assertFalse(d.get_saved()) |
| d.saved_change_hook = Mock() |
| |
| d.set_saved(True) |
| self.assertEqual(d.pointer, d.saved) |
| self.assertTrue(d.saved_change_hook.called) |
| |
| d.set_saved(False) |
| self.assertEqual(d.saved, -1) |
| self.assertTrue(d.saved_change_hook.called) |
| |
| def test_undo_start_stop(self): |
| # test the undo_block_start and undo_block_stop methods |
| text = self.text |
| |
| text.insert('insert', 'foo') |
| self.delegator.undo_block_start() |
| text.insert('insert', 'bar') |
| text.insert('insert', 'bar') |
| self.delegator.undo_block_stop() |
| self.assertEqual(text.get('1.0', '1.3'), 'foo') |
| |
| # test another code path |
| self.delegator.undo_block_start() |
| text.insert('insert', 'bar') |
| self.delegator.undo_block_stop() |
| self.assertEqual(text.get('1.0', '1.3'), 'foo') |
| |
| def test_addcmd(self): |
| text = self.text |
| # when number of undo operations exceeds max_undo |
| self.delegator.max_undo = max_undo = 10 |
| for i in range(max_undo + 10): |
| text.insert('insert', 'foo') |
| self.assertLessEqual(len(self.delegator.undolist), max_undo) |
| |
| |
| if __name__ == '__main__': |
| unittest.main(verbosity=2, exit=False) |