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1" Test history, coverage 100%."
2
3from idlelib.history import History
4import unittest
5from test.support import requires
6
7import tkinter as tk
8from tkinter import Text as tkText
9from idlelib.idle_test.mock_tk import Text as mkText
10from idlelib.config import idleConf
11
12line1 = 'a = 7'
13line2 = 'b = a'
14
15
16class StoreTest(unittest.TestCase):
17    '''Tests History.__init__ and History.store with mock Text'''
18
19    @classmethod
20    def setUpClass(cls):
21        cls.text = mkText()
22        cls.history = History(cls.text)
23
24    def tearDown(self):
25        self.text.delete('1.0', 'end')
26        self.history.history = []
27
28    def test_init(self):
29        self.assertIs(self.history.text, self.text)
30        self.assertEqual(self.history.history, [])
31        self.assertIsNone(self.history.prefix)
32        self.assertIsNone(self.history.pointer)
33        self.assertEqual(self.history.cyclic,
34                idleConf.GetOption("main", "History",  "cyclic", 1, "bool"))
35
36    def test_store_short(self):
37        self.history.store('a')
38        self.assertEqual(self.history.history, [])
39        self.history.store('  a  ')
40        self.assertEqual(self.history.history, [])
41
42    def test_store_dup(self):
43        self.history.store(line1)
44        self.assertEqual(self.history.history, [line1])
45        self.history.store(line2)
46        self.assertEqual(self.history.history, [line1, line2])
47        self.history.store(line1)
48        self.assertEqual(self.history.history, [line2, line1])
49
50    def test_store_reset(self):
51        self.history.prefix = line1
52        self.history.pointer = 0
53        self.history.store(line2)
54        self.assertIsNone(self.history.prefix)
55        self.assertIsNone(self.history.pointer)
56
57
58class TextWrapper:
59    def __init__(self, master):
60        self.text = tkText(master=master)
61        self._bell = False
62    def __getattr__(self, name):
63        return getattr(self.text, name)
64    def bell(self):
65        self._bell = True
66
67
68class FetchTest(unittest.TestCase):
69    '''Test History.fetch with wrapped tk.Text.
70    '''
71    @classmethod
72    def setUpClass(cls):
73        requires('gui')
74        cls.root = tk.Tk()
75        cls.root.withdraw()
76
77    def setUp(self):
78        self.text = text = TextWrapper(self.root)
79        text.insert('1.0', ">>> ")
80        text.mark_set('iomark', '1.4')
81        text.mark_gravity('iomark', 'left')
82        self.history = History(text)
83        self.history.history = [line1, line2]
84
85    @classmethod
86    def tearDownClass(cls):
87        cls.root.destroy()
88        del cls.root
89
90    def fetch_test(self, reverse, line, prefix, index, *, bell=False):
91        # Perform one fetch as invoked by Alt-N or Alt-P
92        # Test the result. The line test is the most important.
93        # The last two are diagnostic of fetch internals.
94        History = self.history
95        History.fetch(reverse)
96
97        Equal = self.assertEqual
98        Equal(self.text.get('iomark', 'end-1c'), line)
99        Equal(self.text._bell, bell)
100        if bell:
101            self.text._bell = False
102        Equal(History.prefix, prefix)
103        Equal(History.pointer, index)
104        Equal(self.text.compare("insert", '==', "end-1c"), 1)
105
106    def test_fetch_prev_cyclic(self):
107        prefix = ''
108        test = self.fetch_test
109        test(True, line2, prefix, 1)
110        test(True, line1, prefix, 0)
111        test(True, prefix, None, None, bell=True)
112
113    def test_fetch_next_cyclic(self):
114        prefix = ''
115        test  = self.fetch_test
116        test(False, line1, prefix, 0)
117        test(False, line2, prefix, 1)
118        test(False, prefix, None, None, bell=True)
119
120    # Prefix 'a' tests skip line2, which starts with 'b'
121    def test_fetch_prev_prefix(self):
122        prefix = 'a'
123        self.text.insert('iomark', prefix)
124        self.fetch_test(True, line1, prefix, 0)
125        self.fetch_test(True, prefix, None, None, bell=True)
126
127    def test_fetch_next_prefix(self):
128        prefix = 'a'
129        self.text.insert('iomark', prefix)
130        self.fetch_test(False, line1, prefix, 0)
131        self.fetch_test(False, prefix, None, None, bell=True)
132
133    def test_fetch_prev_noncyclic(self):
134        prefix = ''
135        self.history.cyclic = False
136        test = self.fetch_test
137        test(True, line2, prefix, 1)
138        test(True, line1, prefix, 0)
139        test(True, line1, prefix, 0, bell=True)
140
141    def test_fetch_next_noncyclic(self):
142        prefix = ''
143        self.history.cyclic = False
144        test  = self.fetch_test
145        test(False, prefix, None, None, bell=True)
146        test(True, line2, prefix, 1)
147        test(False, prefix, None, None, bell=True)
148        test(False, prefix, None, None, bell=True)
149
150    def test_fetch_cursor_move(self):
151        # Move cursor after fetch
152        self.history.fetch(reverse=True)  # initialization
153        self.text.mark_set('insert', 'iomark')
154        self.fetch_test(True, line2, None, None, bell=True)
155
156    def test_fetch_edit(self):
157        # Edit after fetch
158        self.history.fetch(reverse=True)  # initialization
159        self.text.delete('iomark', 'insert', )
160        self.text.insert('iomark', 'a =')
161        self.fetch_test(True, line1, 'a =', 0)  # prefix is reset
162
163    def test_history_prev_next(self):
164        # Minimally test functions bound to events
165        self.history.history_prev('dummy event')
166        self.assertEqual(self.history.pointer, 1)
167        self.history.history_next('dummy event')
168        self.assertEqual(self.history.pointer, None)
169
170
171if __name__ == '__main__':
172    unittest.main(verbosity=2, exit=2)
173