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'''Test idlelib.textview.
Since all methods and functions create (or destroy) a ViewWindow, which
is a widget containing a widget, etcetera, all tests must be gui tests.
Using mock Text would not change this. Other mocks are used to retrieve
information about calls.
Coverage: 100%.
'''
from idlelib import textview as tv
from test.support import requires
requires('gui')
import unittest
import os
from tkinter import Tk
from tkinter.ttk import Button
from idlelib.idle_test.mock_idle import Func
from idlelib.idle_test.mock_tk import Mbox_func
def setUpModule():
global root
root = Tk()
root.withdraw()
def tearDownModule():
global root
root.update_idletasks()
root.destroy()
del root
# If we call ViewWindow or wrapper functions with defaults
# modal=True, _utest=False, test hangs on call to wait_window.
# Have also gotten tk error 'can't invoke "event" command'.
class VW(tv.ViewWindow): # Used in ViewWindowTest.
transient = Func()
grab_set = Func()
wait_window = Func()
# Call wrapper class VW with mock wait_window.
class ViewWindowTest(unittest.TestCase):
def setUp(self):
VW.transient.__init__()
VW.grab_set.__init__()
VW.wait_window.__init__()
def test_init_modal(self):
view = VW(root, 'Title', 'test text')
self.assertTrue(VW.transient.called)
self.assertTrue(VW.grab_set.called)
self.assertTrue(VW.wait_window.called)
view.ok()
def test_init_nonmodal(self):
view = VW(root, 'Title', 'test text', modal=False)
self.assertFalse(VW.transient.called)
self.assertFalse(VW.grab_set.called)
self.assertFalse(VW.wait_window.called)
view.ok()
def test_ok(self):
view = VW(root, 'Title', 'test text', modal=False)
view.destroy = Func()
view.ok()
self.assertTrue(view.destroy.called)
del view.destroy # Unmask real function.
view.destroy()
class TextFrameTest(unittest.TestCase):
@classmethod
def setUpClass(cls):
"By itself, this tests that file parsed without exception."
cls.root = root = Tk()
root.withdraw()
cls.frame = tv.TextFrame(root, 'test text')
@classmethod
def tearDownClass(cls):
del cls.frame
cls.root.update_idletasks()
cls.root.destroy()
del cls.root
def test_line1(self):
get = self.frame.text.get
self.assertEqual(get('1.0', '1.end'), 'test text')
# Call ViewWindow with modal=False.
class ViewFunctionTest(unittest.TestCase):
@classmethod
def setUpClass(cls):
cls.orig_error = tv.showerror
tv.showerror = Mbox_func()
@classmethod
def tearDownClass(cls):
tv.showerror = cls.orig_error
del cls.orig_error
def test_view_text(self):
view = tv.view_text(root, 'Title', 'test text', modal=False)
self.assertIsInstance(view, tv.ViewWindow)
self.assertIsInstance(view.viewframe, tv.ViewFrame)
view.ok()
def test_view_file(self):
view = tv.view_file(root, 'Title', __file__, modal=False)
self.assertIsInstance(view, tv.ViewWindow)
self.assertIsInstance(view.viewframe, tv.ViewFrame)
get = view.viewframe.textframe.text.get
self.assertIn('Test', get('1.0', '1.end'))
view.ok()
def test_bad_file(self):
# Mock showerror will be used; view_file will return None.
view = tv.view_file(root, 'Title', 'abc.xyz', modal=False)
self.assertIsNone(view)
self.assertEqual(tv.showerror.title, 'File Load Error')
def test_bad_encoding(self):
p = os.path
fn = p.abspath(p.join(p.dirname(__file__), '..', 'CREDITS.txt'))
tv.showerror.title = None
view = tv.view_file(root, 'Title', fn, 'ascii', modal=False)
self.assertIsNone(view)
self.assertEqual(tv.showerror.title, 'Unicode Decode Error')
# Call ViewWindow with _utest=True.
class ButtonClickTest(unittest.TestCase):
def setUp(self):
self.view = None
self.called = False
def tearDown(self):
if self.view:
self.view.destroy()
def test_view_text_bind_with_button(self):
def _command():
self.called = True
self.view = tv.view_text(root, 'TITLE_TEXT', 'COMMAND', _utest=True)
button = Button(root, text='BUTTON', command=_command)
button.invoke()
self.addCleanup(button.destroy)
self.assertEqual(self.called, True)
self.assertEqual(self.view.title(), 'TITLE_TEXT')
self.assertEqual(self.view.viewframe.textframe.text.get('1.0', '1.end'),
'COMMAND')
def test_view_file_bind_with_button(self):
def _command():
self.called = True
self.view = tv.view_file(root, 'TITLE_FILE', __file__, _utest=True)
button = Button(root, text='BUTTON', command=_command)
button.invoke()
self.addCleanup(button.destroy)
self.assertEqual(self.called, True)
self.assertEqual(self.view.title(), 'TITLE_FILE')
get = self.view.viewframe.textframe.text.get
with open(__file__) as f:
self.assertEqual(get('1.0', '1.end'), f.readline().strip())
f.readline()
self.assertEqual(get('3.0', '3.end'), f.readline().strip())
if __name__ == '__main__':
unittest.main(verbosity=2)