cpython/Lib/idlelib/idle_test/test_text.py

# Test mock_tk.Text class against tkinter.Text class by running same tests with both.
import unittest
from test.support import requires

from _tkinter import TclError
import tkinter as tk

class TextTest(object):

    hw = 'hello\nworld'  # usual initial insert after initialization
    hwn = hw+'\n'  # \n present at initialization, before insert

    Text = None
    def setUp(self):
        self.text = self.Text()

    def test_init(self):
        self.assertEqual(self.text.get('1.0'), '\n')
        self.assertEqual(self.text.get('end'), '')

    def test_index_empty(self):
        index = self.text.index

        for dex in (-1.0, 0.3, '1.-1', '1.0', '1.0 lineend', '1.end', '1.33',
                'insert'):
            self.assertEqual(index(dex), '1.0')

        for dex in 'end', 2.0, '2.1', '33.44':
            self.assertEqual(index(dex), '2.0')

    def test_index_data(self):
        index = self.text.index
        self.text.insert('1.0', self.hw)

        for dex in -1.0, 0.3, '1.-1', '1.0':
            self.assertEqual(index(dex), '1.0')

        for dex in '1.0 lineend', '1.end', '1.33':
            self.assertEqual(index(dex), '1.5')

        for dex in 'end',  '33.44':
            self.assertEqual(index(dex), '3.0')

    def test_get(self):
        get = self.text.get
        Equal = self.assertEqual
        self.text.insert('1.0', self.hw)

        Equal(get('end'), '')
        Equal(get('end', 'end'), '')
        Equal(get('1.0'), 'h')
        Equal(get('1.0', '1.1'), 'h')
        Equal(get('1.0', '1.3'), 'hel')
        Equal(get('1.1', '1.3'), 'el')
        Equal(get('1.0', '1.0 lineend'), 'hello')
        Equal(get('1.0', '1.10'), 'hello')
        Equal(get('1.0 lineend'), '\n')
        Equal(get('1.1', '2.3'), 'ello\nwor')
        Equal(get('1.0', '2.5'), self.hw)
        Equal(get('1.0', 'end'), self.hwn)
        Equal(get('0.0', '5.0'), self.hwn)

    def test_insert(self):
        insert = self.text.insert
        get = self.text.get
        Equal = self.assertEqual

        insert('1.0', self.hw)
        Equal(get('1.0', 'end'), self.hwn)

        insert('1.0', '')  # nothing
        Equal(get('1.0', 'end'), self.hwn)

        insert('1.0', '*')
        Equal(get('1.0', 'end'), '*hello\nworld\n')

        insert('1.0 lineend', '*')
        Equal(get('1.0', 'end'), '*hello*\nworld\n')

        insert('2.3', '*')
        Equal(get('1.0', 'end'), '*hello*\nwor*ld\n')

        insert('end', 'x')
        Equal(get('1.0', 'end'), '*hello*\nwor*ldx\n')

        insert('1.4', 'x\n')
        Equal(get('1.0', 'end'), '*helx\nlo*\nwor*ldx\n')

    def test_no_delete(self):
        # if index1 == 'insert' or 'end' or >= end, there is no deletion
        delete = self.text.delete
        get = self.text.get
        Equal = self.assertEqual
        self.text.insert('1.0', self.hw)

        delete('insert')
        Equal(get('1.0', 'end'), self.hwn)

        delete('end')
        Equal(get('1.0', 'end'), self.hwn)

        delete('insert', 'end')
        Equal(get('1.0', 'end'), self.hwn)

        delete('insert', '5.5')
        Equal(get('1.0', 'end'), self.hwn)

        delete('1.4', '1.0')
        Equal(get('1.0', 'end'), self.hwn)

        delete('1.4', '1.4')
        Equal(get('1.0', 'end'), self.hwn)

    def test_delete_char(self):
        delete = self.text.delete
        get = self.text.get
        Equal = self.assertEqual
        self.text.insert('1.0', self.hw)

        delete('1.0')
        Equal(get('1.0', '1.end'), 'ello')

        delete('1.0', '1.1')
        Equal(get('1.0', '1.end'), 'llo')

        # delete \n and combine 2 lines into 1
        delete('1.end')
        Equal(get('1.0', '1.end'), 'lloworld')

        self.text.insert('1.3', '\n')
        delete('1.10')
        Equal(get('1.0', '1.end'), 'lloworld')

        self.text.insert('1.3', '\n')
        delete('1.3', '2.0')
        Equal(get('1.0', '1.end'), 'lloworld')

    def test_delete_slice(self):
        delete = self.text.delete
        get = self.text.get
        Equal = self.assertEqual
        self.text.insert('1.0', self.hw)

        delete('1.0', '1.0 lineend')
        Equal(get('1.0', 'end'), '\nworld\n')

        delete('1.0', 'end')
        Equal(get('1.0', 'end'), '\n')

        self.text.insert('1.0', self.hw)
        delete('1.0', '2.0')
        Equal(get('1.0', 'end'), 'world\n')

        delete('1.0', 'end')
        Equal(get('1.0', 'end'), '\n')

        self.text.insert('1.0', self.hw)
        delete('1.2', '2.3')
        Equal(get('1.0', 'end'), 'held\n')

    def test_multiple_lines(self):  # insert and delete
        self.text.insert('1.0', 'hello')

        self.text.insert('1.3', '1\n2\n3\n4\n5')
        self.assertEqual(self.text.get('1.0', 'end'), 'hel1\n2\n3\n4\n5lo\n')

        self.text.delete('1.3', '5.1')
        self.assertEqual(self.text.get('1.0', 'end'), 'hello\n')

    def test_compare(self):
        compare = self.text.compare
        Equal = self.assertEqual
        # need data so indexes not squished to 1,0
        self.text.insert('1.0', 'First\nSecond\nThird\n')

        self.assertRaises(TclError, compare, '2.2', 'op', '2.2')

        for op, less1, less0, equal, greater0, greater1 in (
                ('<', True, True, False, False, False),
                ('<=', True, True, True, False, False),
                ('>', False, False, False, True, True),
                ('>=', False, False, True, True, True),
                ('==', False, False, True, False, False),
                ('!=', True, True, False, True, True),
                ):
            Equal(compare('1.1', op, '2.2'), less1, op)
            Equal(compare('2.1', op, '2.2'), less0, op)
            Equal(compare('2.2', op, '2.2'), equal, op)
            Equal(compare('2.3', op, '2.2'), greater0, op)
            Equal(compare('3.3', op, '2.2'), greater1, op)


class MockTextTest(TextTest, unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        from idlelib.idle_test.mock_tk import Text
        cls.Text = Text

    def test_decode(self):
        # test endflags (-1, 0) not tested by test_index (which uses +1)
        decode = self.text._decode
        Equal = self.assertEqual
        self.text.insert('1.0', self.hw)

        Equal(decode('end', -1), (2, 5))
        Equal(decode('3.1', -1), (2, 5))
        Equal(decode('end',  0), (2, 6))
        Equal(decode('3.1', 0), (2, 6))


class TkTextTest(TextTest, unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        requires('gui')
        from tkinter import Tk, Text
        cls.Text = Text
        cls.root = Tk()

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


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