Preview: test_parenmatch.py
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/opt/alt/python37/lib64/python3.7/idlelib/idle_test/test_parenmatch.py
"""Test parenmatch, coverage 91%.
This must currently be a gui test because ParenMatch methods use
several text methods not defined on idlelib.idle_test.mock_tk.Text.
"""
from idlelib.parenmatch import ParenMatch
from test.support import requires
requires('gui')
import unittest
from unittest.mock import Mock
from tkinter import Tk, Text
class DummyEditwin:
def __init__(self, text):
self.text = text
self.indentwidth = 8
self.tabwidth = 8
self.prompt_last_line = '>>>' # Currently not used by parenmatch.
class ParenMatchTest(unittest.TestCase):
@classmethod
def setUpClass(cls):
cls.root = Tk()
cls.root.withdraw()
cls.text = Text(cls.root)
cls.editwin = DummyEditwin(cls.text)
cls.editwin.text_frame = Mock()
@classmethod
def tearDownClass(cls):
del cls.text, cls.editwin
cls.root.update_idletasks()
cls.root.destroy()
del cls.root
def tearDown(self):
self.text.delete('1.0', 'end')
def get_parenmatch(self):
pm = ParenMatch(self.editwin)
pm.bell = lambda: None
return pm
def test_paren_styles(self):
"""
Test ParenMatch with each style.
"""
text = self.text
pm = self.get_parenmatch()
for style, range1, range2 in (
('opener', ('1.10', '1.11'), ('1.10', '1.11')),
('default',('1.10', '1.11'),('1.10', '1.11')),
('parens', ('1.14', '1.15'), ('1.15', '1.16')),
('expression', ('1.10', '1.15'), ('1.10', '1.16'))):
with self.subTest(style=style):
text.delete('1.0', 'end')
pm.STYLE = style
text.insert('insert', 'def foobar(a, b')
pm.flash_paren_event('event')
self.assertIn('<<parenmatch-check-restore>>', text.event_info())
if style == 'parens':
self.assertTupleEqual(text.tag_nextrange('paren', '1.0'),
('1.10', '1.11'))
self.assertTupleEqual(
text.tag_prevrange('paren', 'end'), range1)
text.insert('insert', ')')
pm.restore_event()
self.assertNotIn('<<parenmatch-check-restore>>',
text.event_info())
self.assertEqual(text.tag_prevrange('paren', 'end'), ())
pm.paren_closed_event('event')
self.assertTupleEqual(
text.tag_prevrange('paren', 'end'), range2)
def test_paren_corner(self):
"""
Test corner cases in flash_paren_event and paren_closed_event.
These cases force conditional expression and alternate paths.
"""
text = self.text
pm = self.get_parenmatch()
text.insert('insert', '# this is a commen)')
pm.paren_closed_event('event')
text.insert('insert', '\ndef')
pm.flash_paren_event('event')
pm.paren_closed_event('event')
text.insert('insert', ' a, *arg)')
pm.paren_closed_event('event')
def test_handle_restore_timer(self):
pm = self.get_parenmatch()
pm.restore_event = Mock()
pm.handle_restore_timer(0)
self.assertTrue(pm.restore_event.called)
pm.restore_event.reset_mock()
pm.handle_restore_timer(1)
self.assertFalse(pm.restore_event.called)
if __name__ == '__main__':
unittest.main(verbosity=2)
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