summaryrefslogtreecommitdiff
path: root/Lib/idlelib/idle_test/test_percolator.py
blob: 573b9a1e8e69e3905122b905c4f30ee3958b17d7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
'''Test percolator.py.'''
from test.support import requires
requires('gui')

import unittest
from tkinter import Text, Tk, END
from idlelib.percolator import Percolator, Delegator


class MyFilter(Delegator):
    def __init__(self):
        Delegator.__init__(self, None)

    def insert(self, *args):
        self.insert_called_with = args
        self.delegate.insert(*args)

    def delete(self, *args):
        self.delete_called_with = args
        self.delegate.delete(*args)

    def uppercase_insert(self, index, chars, tags=None):
        chars = chars.upper()
        self.delegate.insert(index, chars)

    def lowercase_insert(self, index, chars, tags=None):
        chars = chars.lower()
        self.delegate.insert(index, chars)

    def dont_insert(self, index, chars, tags=None):
        pass


class PercolatorTest(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        cls.root = Tk()
        cls.text = Text(cls.root)

    @classmethod
    def tearDownClass(cls):
        del cls.text
        cls.root.destroy()
        del cls.root

    def setUp(self):
        self.percolator = Percolator(self.text)
        self.filter_one = MyFilter()
        self.filter_two = MyFilter()
        self.percolator.insertfilter(self.filter_one)
        self.percolator.insertfilter(self.filter_two)

    def tearDown(self):
        self.percolator.close()
        self.text.delete('1.0', END)

    def test_insertfilter(self):
        self.assertIsNotNone(self.filter_one.delegate)
        self.assertEqual(self.percolator.top, self.filter_two)
        self.assertEqual(self.filter_two.delegate, self.filter_one)
        self.assertEqual(self.filter_one.delegate, self.percolator.bottom)

    def test_removefilter(self):
        filter_three = MyFilter()
        self.percolator.removefilter(self.filter_two)
        self.assertEqual(self.percolator.top, self.filter_one)
        self.assertIsNone(self.filter_two.delegate)

        filter_three = MyFilter()
        self.percolator.insertfilter(self.filter_two)
        self.percolator.insertfilter(filter_three)
        self.percolator.removefilter(self.filter_one)
        self.assertEqual(self.percolator.top, filter_three)
        self.assertEqual(filter_three.delegate, self.filter_two)
        self.assertEqual(self.filter_two.delegate, self.percolator.bottom)
        self.assertIsNone(self.filter_one.delegate)

    def test_insert(self):
        self.text.insert('insert', 'foo')
        self.assertEqual(self.text.get('1.0', END), 'foo\n')
        self.assertTupleEqual(self.filter_one.insert_called_with,
                              ('insert', 'foo', None))

    def test_modify_insert(self):
        self.filter_one.insert = self.filter_one.uppercase_insert
        self.text.insert('insert', 'bAr')
        self.assertEqual(self.text.get('1.0', END), 'BAR\n')

    def test_modify_chain_insert(self):
        filter_three = MyFilter()
        self.percolator.insertfilter(filter_three)
        self.filter_two.insert = self.filter_two.uppercase_insert
        self.filter_one.insert = self.filter_one.lowercase_insert
        self.text.insert('insert', 'BaR')
        self.assertEqual(self.text.get('1.0', END), 'bar\n')

    def test_dont_insert(self):
        self.filter_one.insert = self.filter_one.dont_insert
        self.text.insert('insert', 'foo bar')
        self.assertEqual(self.text.get('1.0', END), '\n')
        self.filter_one.insert = self.filter_one.dont_insert
        self.text.insert('insert', 'foo bar')
        self.assertEqual(self.text.get('1.0', END), '\n')

    def test_without_filter(self):
        self.text.insert('insert', 'hello')
        self.assertEqual(self.text.get('1.0', 'end'), 'hello\n')

    def test_delete(self):
        self.text.insert('insert', 'foo')
        self.text.delete('1.0', '1.2')
        self.assertEqual(self.text.get('1.0', END), 'o\n')
        self.assertTupleEqual(self.filter_one.delete_called_with,
                              ('1.0', '1.2'))

if __name__ == '__main__':
    unittest.main(verbosity=2)