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      1 "Test autoexpand, coverage 100%."
      2 
      3 from idlelib.autoexpand import AutoExpand
      4 import unittest
      5 from test.support import requires
      6 from tkinter import Text, Tk
      7 
      8 
      9 class Dummy_Editwin:
     10     # AutoExpand.__init__ only needs .text
     11     def __init__(self, text):
     12         self.text = text
     13 
     14 class AutoExpandTest(unittest.TestCase):
     15 
     16     @classmethod
     17     def setUpClass(cls):
     18         requires('gui')
     19         cls.tk = Tk()
     20         cls.text = Text(cls.tk)
     21         cls.auto_expand = AutoExpand(Dummy_Editwin(cls.text))
     22         cls.auto_expand.bell = lambda: None
     23 
     24 # If mock_tk.Text._decode understood indexes 'insert' with suffixed 'linestart',
     25 # 'wordstart', and 'lineend', used by autoexpand, we could use the following
     26 # to run these test on non-gui machines (but check bell).
     27 ##        try:
     28 ##            requires('gui')
     29 ##            #raise ResourceDenied()  # Uncomment to test mock.
     30 ##        except ResourceDenied:
     31 ##            from idlelib.idle_test.mock_tk import Text
     32 ##            cls.text = Text()
     33 ##            cls.text.bell = lambda: None
     34 ##        else:
     35 ##            from tkinter import Tk, Text
     36 ##            cls.tk = Tk()
     37 ##            cls.text = Text(cls.tk)
     38 
     39     @classmethod
     40     def tearDownClass(cls):
     41         del cls.text, cls.auto_expand
     42         if hasattr(cls, 'tk'):
     43             cls.tk.destroy()
     44             del cls.tk
     45 
     46     def tearDown(self):
     47         self.text.delete('1.0', 'end')
     48 
     49     def test_get_prevword(self):
     50         text = self.text
     51         previous = self.auto_expand.getprevword
     52         equal = self.assertEqual
     53 
     54         equal(previous(), '')
     55 
     56         text.insert('insert', 't')
     57         equal(previous(), 't')
     58 
     59         text.insert('insert', 'his')
     60         equal(previous(), 'this')
     61 
     62         text.insert('insert', ' ')
     63         equal(previous(), '')
     64 
     65         text.insert('insert', 'is')
     66         equal(previous(), 'is')
     67 
     68         text.insert('insert', '\nsample\nstring')
     69         equal(previous(), 'string')
     70 
     71         text.delete('3.0', 'insert')
     72         equal(previous(), '')
     73 
     74         text.delete('1.0', 'end')
     75         equal(previous(), '')
     76 
     77     def test_before_only(self):
     78         previous = self.auto_expand.getprevword
     79         expand = self.auto_expand.expand_word_event
     80         equal = self.assertEqual
     81 
     82         self.text.insert('insert', 'ab ac bx ad ab a')
     83         equal(self.auto_expand.getwords(), ['ab', 'ad', 'ac', 'a'])
     84         expand('event')
     85         equal(previous(), 'ab')
     86         expand('event')
     87         equal(previous(), 'ad')
     88         expand('event')
     89         equal(previous(), 'ac')
     90         expand('event')
     91         equal(previous(), 'a')
     92 
     93     def test_after_only(self):
     94         # Also add punctuation 'noise' that should be ignored.
     95         text = self.text
     96         previous = self.auto_expand.getprevword
     97         expand = self.auto_expand.expand_word_event
     98         equal = self.assertEqual
     99 
    100         text.insert('insert', 'a, [ab] ac: () bx"" cd ac= ad ya')
    101         text.mark_set('insert', '1.1')
    102         equal(self.auto_expand.getwords(), ['ab', 'ac', 'ad', 'a'])
    103         expand('event')
    104         equal(previous(), 'ab')
    105         expand('event')
    106         equal(previous(), 'ac')
    107         expand('event')
    108         equal(previous(), 'ad')
    109         expand('event')
    110         equal(previous(), 'a')
    111 
    112     def test_both_before_after(self):
    113         text = self.text
    114         previous = self.auto_expand.getprevword
    115         expand = self.auto_expand.expand_word_event
    116         equal = self.assertEqual
    117 
    118         text.insert('insert', 'ab xy yz\n')
    119         text.insert('insert', 'a ac by ac')
    120 
    121         text.mark_set('insert', '2.1')
    122         equal(self.auto_expand.getwords(), ['ab', 'ac', 'a'])
    123         expand('event')
    124         equal(previous(), 'ab')
    125         expand('event')
    126         equal(previous(), 'ac')
    127         expand('event')
    128         equal(previous(), 'a')
    129 
    130     def test_other_expand_cases(self):
    131         text = self.text
    132         expand = self.auto_expand.expand_word_event
    133         equal = self.assertEqual
    134 
    135         # no expansion candidate found
    136         equal(self.auto_expand.getwords(), [])
    137         equal(expand('event'), 'break')
    138 
    139         text.insert('insert', 'bx cy dz a')
    140         equal(self.auto_expand.getwords(), [])
    141 
    142         # reset state by successfully expanding once
    143         # move cursor to another position and expand again
    144         text.insert('insert', 'ac xy a ac ad a')
    145         text.mark_set('insert', '1.7')
    146         expand('event')
    147         initial_state = self.auto_expand.state
    148         text.mark_set('insert', '1.end')
    149         expand('event')
    150         new_state = self.auto_expand.state
    151         self.assertNotEqual(initial_state, new_state)
    152 
    153 
    154 if __name__ == '__main__':
    155     unittest.main(verbosity=2)
    156