Preview: test_autoexpand.py
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/opt/alt/python37/lib64/python3.7/idlelib/idle_test/test_autoexpand.py
"Test autoexpand, coverage 100%."
from idlelib.autoexpand import AutoExpand
import unittest
from test.support import requires
from tkinter import Text, Tk
class DummyEditwin:
# AutoExpand.__init__ only needs .text
def __init__(self, text):
self.text = text
class AutoExpandTest(unittest.TestCase):
@classmethod
def setUpClass(cls):
requires('gui')
cls.tk = Tk()
cls.text = Text(cls.tk)
cls.auto_expand = AutoExpand(DummyEditwin(cls.text))
cls.auto_expand.bell = lambda: None
# If mock_tk.Text._decode understood indexes 'insert' with suffixed 'linestart',
# 'wordstart', and 'lineend', used by autoexpand, we could use the following
# to run these test on non-gui machines (but check bell).
## try:
## requires('gui')
## #raise ResourceDenied() # Uncomment to test mock.
## except ResourceDenied:
## from idlelib.idle_test.mock_tk import Text
## cls.text = Text()
## cls.text.bell = lambda: None
## else:
## from tkinter import Tk, Text
## cls.tk = Tk()
## cls.text = Text(cls.tk)
@classmethod
def tearDownClass(cls):
del cls.text, cls.auto_expand
if hasattr(cls, 'tk'):
cls.tk.destroy()
del cls.tk
def tearDown(self):
self.text.delete('1.0', 'end')
def test_get_prevword(self):
text = self.text
previous = self.auto_expand.getprevword
equal = self.assertEqual
equal(previous(), '')
text.insert('insert', 't')
equal(previous(), 't')
text.insert('insert', 'his')
equal(previous(), 'this')
text.insert('insert', ' ')
equal(previous(), '')
text.insert('insert', 'is')
equal(previous(), 'is')
text.insert('insert', '\nsample\nstring')
equal(previous(), 'string')
text.delete('3.0', 'insert')
equal(previous(), '')
text.delete('1.0', 'end')
equal(previous(), '')
def test_before_only(self):
previous = self.auto_expand.getprevword
expand = self.auto_expand.expand_word_event
equal = self.assertEqual
self.text.insert('insert', 'ab ac bx ad ab a')
equal(self.auto_expand.getwords(), ['ab', 'ad', 'ac', 'a'])
expand('event')
equal(previous(), 'ab')
expand('event')
equal(previous(), 'ad')
expand('event')
equal(previous(), 'ac')
expand('event')
equal(previous(), 'a')
def test_after_only(self):
# Also add punctuation 'noise' that should be ignored.
text = self.text
previous = self.auto_expand.getprevword
expand = self.auto_expand.expand_word_event
equal = self.assertEqual
text.insert('insert', 'a, [ab] ac: () bx"" cd ac= ad ya')
text.mark_set('insert', '1.1')
equal(self.auto_expand.getwords(), ['ab', 'ac', 'ad', 'a'])
expand('event')
equal(previous(), 'ab')
expand('event')
equal(previous(), 'ac')
expand('event')
equal(previous(), 'ad')
expand('event')
equal(previous(), 'a')
def test_both_before_after(self):
text = self.text
previous = self.auto_expand.getprevword
expand = self.auto_expand.expand_word_event
equal = self.assertEqual
text.insert('insert', 'ab xy yz\n')
text.insert('insert', 'a ac by ac')
text.mark_set('insert', '2.1')
equal(self.auto_expand.getwords(), ['ab', 'ac', 'a'])
expand('event')
equal(previous(), 'ab')
expand('event')
equal(previous(), 'ac')
expand('event')
equal(previous(), 'a')
def test_other_expand_cases(self):
text = self.text
expand = self.auto_expand.expand_word_event
equal = self.assertEqual
# no expansion candidate found
equal(self.auto_expand.getwords(), [])
equal(expand('event'), 'break')
text.insert('insert', 'bx cy dz a')
equal(self.auto_expand.getwords(), [])
# reset state by successfully expanding once
# move cursor to another position and expand again
text.insert('insert', 'ac xy a ac ad a')
text.mark_set('insert', '1.7')
expand('event')
initial_state = self.auto_expand.state
text.mark_set('insert', '1.end')
expand('event')
new_state = self.auto_expand.state
self.assertNotEqual(initial_state, new_state)
if __name__ == '__main__':
unittest.main(verbosity=2)
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