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'''Test idlelib.textview.
Since all methods and functions create (or destroy) a TextViewer, which
is a widget containing multiple widgets, all tests must be gui tests.
Using mock Text would not change this. Other mocks are used to retrieve
information about calls.
Coverage: 94%.
'''
from idlelib import textview as tv
from test.support import requires
requires('gui')
import unittest
import os
from tkinter import Tk
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() # Pyflakes falsely sees root as undefined.
del root
class TV(tv.TextViewer): # Used in TextViewTest.
transient = Func()
grab_set = Func()
wait_window = Func()
class TextViewTest(unittest.TestCase):
def setUp(self):
TV.transient.__init__()
TV.grab_set.__init__()
TV.wait_window.__init__()
def test_init_modal(self):
view = TV(root, 'Title', 'test text')
self.assertTrue(TV.transient.called)
self.assertTrue(TV.grab_set.called)
self.assertTrue(TV.wait_window.called)
view.Ok()
def test_init_nonmodal(self):
view = TV(root, 'Title', 'test text', modal=False)
self.assertFalse(TV.transient.called)
self.assertFalse(TV.grab_set.called)
self.assertFalse(TV.wait_window.called)
view.Ok()
def test_ok(self):
view = TV(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 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):
# If modal True, get tk error 'can't invoke "event" command'.
view = tv.view_text(root, 'Title', 'test text', modal=False)
self.assertIsInstance(view, tv.TextViewer)
view.Ok()
def test_view_file(self):
test_dir = os.path.dirname(__file__)
testfile = os.path.join(test_dir, 'test_textview.py')
view = tv.view_file(root, 'Title', testfile, modal=False)
self.assertIsInstance(view, tv.TextViewer)
self.assertIn('Test', view.textView.get('1.0', '1.end'))
view.Ok()
# Mock showerror will be used; view_file will return None.
testfile = os.path.join(test_dir, '../notthere.py')
view = tv.view_file(root, 'Title', testfile, modal=False)
self.assertIsNone(view)
if __name__ == '__main__':
unittest.main(verbosity=2)
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