tk call returns where python would return none test that init causes redirection of tk calls through redir dispatch ensure that called through redir dispatch and not through self text insert by having mock raise tclerror restore self tk self text leaves self text empty partly for 100 coverage tk call returns where python would return none test that __init__ causes redirection of tk calls through redir dispatch ensure that called through redir dispatch and not through self text insert by having mock raise tclerror
"Test redirector, coverage 100%."

from idlelib.redirector import WidgetRedirector
import unittest
from test.support import requires
from tkinter import Tk, Text, TclError
from idlelib.idle_test.mock_idle import Func


class InitCloseTest(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        requires('gui')
        cls.root = Tk()
        cls.root.withdraw()
        cls.text = Text(cls.root)

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

    def test_init(self):
        redir = WidgetRedirector(self.text)
        self.assertEqual(redir.widget, self.text)
        self.assertEqual(redir.tk, self.text.tk)
        self.assertRaises(TclError, WidgetRedirector, self.text)
        redir.close()  

    def test_close(self):
        redir = WidgetRedirector(self.text)
        redir.register('insert', Func)
        redir.close()
        self.assertEqual(redir._operations, {})
        self.assertFalse(hasattr(self.text, 'widget'))


class WidgetRedirectorTest(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        requires('gui')
        cls.root = Tk()
        cls.root.withdraw()
        cls.text = Text(cls.root)

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

    def setUp(self):
        self.redir = WidgetRedirector(self.text)
        self.func = Func()
        self.orig_insert = self.redir.register('insert', self.func)
        self.text.insert('insert', 'asdf')  

    def tearDown(self):
        self.text.delete('1.0', 'end')
        self.redir.close()

    def test_repr(self):  
        self.assertIn('Redirector', repr(self.redir))
        self.assertIn('Original', repr(self.orig_insert))

    def test_register(self):
        self.assertEqual(self.text.get('1.0', 'end'), '\n')
        self.assertEqual(self.func.args, ('insert', 'asdf'))
        self.assertIn('insert', self.redir._operations)
        self.assertIn('insert', self.text.__dict__)
        self.assertEqual(self.text.insert, self.func)

    def test_original_command(self):
        self.assertEqual(self.orig_insert.operation, 'insert')
        self.assertEqual(self.orig_insert.tk_call, self.text.tk.call)
        self.orig_insert('insert', 'asdf')
        self.assertEqual(self.text.get('1.0', 'end'), 'asdf\n')

    def test_unregister(self):
        self.assertIsNone(self.redir.unregister('invalid operation name'))
        self.assertEqual(self.redir.unregister('insert'), self.func)
        self.assertNotIn('insert', self.redir._operations)
        self.assertNotIn('insert', self.text.__dict__)

    def test_unregister_no_attribute(self):
        del self.text.insert
        self.assertEqual(self.redir.unregister('insert'), self.func)

    def test_dispatch_intercept(self):
        self.func.__init__(True)
        self.assertTrue(self.redir.dispatch('insert', False))
        self.assertFalse(self.func.args[0])

    def test_dispatch_bypass(self):
        self.orig_insert('insert', 'asdf')
        
        self.assertEqual(self.redir.dispatch('delete', '1.0', 'end'), '')
        self.assertEqual(self.text.get('1.0', 'end'), '\n')

    def test_dispatch_error(self):
        self.func.__init__(TclError())
        self.assertEqual(self.redir.dispatch('insert', False), '')
        self.assertEqual(self.redir.dispatch('invalid'), '')

    def test_command_dispatch(self):
        
        
        self.root.call(self.text._w, 'insert', 'hello')
        self.assertEqual(self.func.args, ('hello',))
        self.assertEqual(self.text.get('1.0', 'end'), '\n')
        
        
        self.func.__init__(TclError())
        self.assertEqual(self.root.call(self.text._w, 'insert', 'boo'), '')


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