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"Test tree. coverage 56%."
from idlelib import tree
import unittest
from test.support import requires
requires('gui')
from tkinter import Tk, EventType, SCROLL
class TreeTest(unittest.TestCase):
@classmethod
def setUpClass(cls):
cls.root = Tk()
cls.root.withdraw()
@classmethod
def tearDownClass(cls):
cls.root.destroy()
del cls.root
def test_init(self):
# Start with code slightly adapted from htest.
sc = tree.ScrolledCanvas(
self.root, bg="white", highlightthickness=0, takefocus=1)
sc.frame.pack(expand=1, fill="both", side='left')
item = tree.FileTreeItem(tree.ICONDIR)
node = tree.TreeNode(sc.canvas, None, item)
node.expand()
class TestScrollEvent(unittest.TestCase):
def test_wheel_event(self):
# Fake widget class containing `yview` only.
class _Widget:
def __init__(widget, *expected):
widget.expected = expected
def yview(widget, *args):
self.assertTupleEqual(widget.expected, args)
# Fake event class
class _Event:
pass
# (type, delta, num, amount)
tests = ((EventType.MouseWheel, 120, -1, -5),
(EventType.MouseWheel, -120, -1, 5),
(EventType.ButtonPress, -1, 4, -5),
(EventType.ButtonPress, -1, 5, 5))
event = _Event()
for ty, delta, num, amount in tests:
event.type = ty
event.delta = delta
event.num = num
res = tree.wheel_event(event, _Widget(SCROLL, amount, "units"))
self.assertEqual(res, "break")
if __name__ == '__main__':
unittest.main(verbosity=2)
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