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test_ui.py
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test_ui.py
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# ------------------------------------------------------------------------------
#
# Copyright (c) 2012, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Author: Pietro Berkes
# Date: Feb 2012
#
# ------------------------------------------------------------------------------
"""
Test cases for the UI object.
"""
import unittest
from traits.api import Property
from traits.has_traits import HasTraits, HasStrictTraits
from traits.trait_types import Str, Int
import traitsui
from traitsui.item import Item, spring
from traitsui.testing.tester import command, query
from traitsui.testing.tester.ui_tester import UITester
from traitsui.view import View
from traitsui.tests._tools import (
count_calls,
create_ui,
requires_toolkit,
ToolkitName,
)
class FooDialog(HasTraits):
"""Test dialog that does nothing useful."""
my_int = Int(2)
my_str = Str("hallo")
traits_view = View(Item("my_int"), Item("my_str"), buttons=["OK"])
class DisallowNewTraits(HasStrictTraits):
""" Make sure no extra traits are added.
"""
x = Int(10)
traits_view = View(Item("x"), spring)
class MaybeInvalidTrait(HasTraits):
name = Str()
name_is_invalid = Property(depends_on="name")
traits_view = View(
Item("name", invalid="name_is_invalid")
)
def _get_name_is_invalid(self):
return len(self.name) < 10
class TestUI(unittest.TestCase):
@requires_toolkit([ToolkitName.wx])
def test_reset_with_destroy_wx(self):
# Characterization test:
# UI.reset(destroy=True) destroys all ui children of the top control
foo = FooDialog()
with create_ui(foo) as ui:
ui.reset(destroy=True)
# the top control is still there
self.assertIsNotNone(ui.control)
# but its children are gone
self.assertEqual(len(ui.control.GetChildren()), 0)
@requires_toolkit([ToolkitName.qt])
def test_reset_with_destroy_qt(self):
# Characterization test:
# UI.reset(destroy=True) destroys all ui children of the top control
from pyface import qt
foo = FooDialog()
with create_ui(foo) as ui:
# decorate children's `deleteLater` function to check that it is
# called on `reset`. check only with the editor parts (only widgets
# are scheduled.
# See traitsui.qt4.toolkit.GUIToolkit.destroy_children)
for c in ui.control.children():
c.deleteLater = count_calls(c.deleteLater)
ui.reset(destroy=True)
# the top control is still there
self.assertIsNotNone(ui.control)
# but its children are scheduled for removal
for c in ui.control.children():
if isinstance(c, qt.QtGui.QWidget):
self.assertEqual(c.deleteLater._n_calls, 1)
@requires_toolkit([ToolkitName.wx])
def test_reset_without_destroy_wx(self):
# Characterization test:
# UI.reset(destroy=False) destroys all editor controls, but leaves
# editors and ui children intact
import wx
foo = FooDialog()
with create_ui(foo) as ui:
self.assertEqual(len(ui._editors), 2)
self.assertIsInstance(
ui._editors[0], traitsui.wx.text_editor.SimpleEditor
)
self.assertIsInstance(
ui._editors[0].control, wx.TextCtrl
)
ui.reset(destroy=False)
self.assertEqual(len(ui._editors), 2)
self.assertIsInstance(
ui._editors[0], traitsui.wx.text_editor.SimpleEditor
)
self.assertIsNone(ui._editors[0].control)
# children are still there: check first text control
text_ctrl = ui.control.FindWindowByName("text")
self.assertIsNotNone(text_ctrl)
@requires_toolkit([ToolkitName.qt])
def test_reset_without_destroy_qt(self):
# Characterization test:
# UI.reset(destroy=False) destroys all editor controls, but leaves
# editors and ui children intact
from pyface import qt
foo = FooDialog()
with create_ui(foo) as ui:
self.assertEqual(len(ui._editors), 2)
self.assertIsInstance(
ui._editors[0], traitsui.qt4.text_editor.SimpleEditor
)
self.assertIsInstance(ui._editors[0].control, qt.QtGui.QLineEdit)
ui.reset(destroy=False)
self.assertEqual(len(ui._editors), 2)
self.assertIsInstance(
ui._editors[0], traitsui.qt4.text_editor.SimpleEditor
)
self.assertIsNone(ui._editors[0].control)
# children are still there: check first text control
text_ctrl = ui.control.findChild(qt.QtGui.QLineEdit)
self.assertIsNotNone(text_ctrl)
@requires_toolkit([ToolkitName.wx])
def test_destroy_after_ok_wx(self):
# Behavior: after pressing 'OK' in a dialog, the method UI.finish is
# called and the view control and its children are destroyed
foo = FooDialog()
tester = UITester()
with tester.create_ui(foo) as ui:
# keep reference to the control to check that it was destroyed
control = ui.control
# decorate control's `Destroy` function to check that it is called
control.Destroy = count_calls(control.Destroy)
# press the OK button and close the dialog
ok_button = tester.find_by_id(ui, "OK")
self.assertEqual(ok_button.inspect(query.DisplayedText()), "OK")
ok_button.perform(command.MouseClick())
self.assertIsNone(ui.control)
self.assertEqual(control.Destroy._n_calls, 1)
@requires_toolkit([ToolkitName.qt])
def test_destroy_after_ok_qt(self):
# Behavior: after pressing 'OK' in a dialog, the method UI.finish is
# called and the view control and its children are destroyed
foo = FooDialog()
tester = UITester()
with tester.create_ui(foo) as ui:
# keep reference to the control to check that it was deleted
control = ui.control
# decorate control's `deleteLater` function to check that it is
# called
control.deleteLater = count_calls(control.deleteLater)
# press the OK button and close the dialog
ok_button = tester.find_by_id(ui, "OK")
self.assertEqual(ok_button.inspect(query.DisplayedText()), "OK")
ok_button.perform(command.MouseClick())
self.assertIsNone(ui.control)
self.assertEqual(control.deleteLater._n_calls, 1)
@requires_toolkit([ToolkitName.qt, ToolkitName.wx])
def test_no_spring_trait(self):
obj = DisallowNewTraits()
with create_ui(obj):
pass
self.assertTrue("spring" not in obj.traits())
@requires_toolkit([ToolkitName.qt, ToolkitName.wx])
def test_invalid_state(self):
# Regression test for enthought/traitsui#983
obj = MaybeInvalidTrait(name="Name long enough to be valid")
with create_ui(obj) as ui:
editor, = ui.get_editors("name")
self.assertFalse(editor.invalid)
obj.name = "too short"
self.assertTrue(editor.invalid)