text: """Test idlelib.redirector.
  
  100% coverage
  """
  from test.support import requires
  import unittest
  from idlelib.idle_test.mock_idle import Func
  from tkinter import Tk, Text, TclError
  from idlelib.redirector import WidgetRedirector
  
  
  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)
  