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test_widgetredir.py
"""Unittest for idlelib.WidgetRedirector 100% coverage """ from test.test_support import requires import unittest from idlelib.idle_test.mock_idle import Func from Tkinter import Tk, Text, TclError from idlelib.WidgetRedirector 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() # restore self.tk, self.text 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.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') # leaves self.text empty def tearDown(self): self.text.delete('1.0', 'end') self.redir.close() def test_repr(self): # partly for 100% coverage 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') # tk.call returns '' where Python would return None 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): # Test that .__init__ causes redirection of tk calls # through redir.dispatch self.root.call(self.text._w, 'insert', 'hello') self.assertEqual(self.func.args, ('hello',)) self.assertEqual(self.text.get('1.0', 'end'), '\n') # Ensure that called through redir .dispatch and not through # self.text.insert by having mock raise TclError. self.func.__init__(TclError()) self.assertEqual(self.root.call(self.text._w, 'insert', 'boo'), '') if __name__ == '__main__': unittest.main(verbosity=2)
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