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"""Test tooltip, coverage 100%.

Coverage is 100% after excluding 6 lines with "# pragma: no cover".
They involve TclErrors that either should or should not happen in a
particular situation, and which are 'pass'ed if they do.
"""

from idlelib.tooltip import TooltipBase, Hovertip
from test.support import requires
requires('gui')

from functools import wraps
import time
from tkinter import Button, Tk, Toplevel
import unittest


def setUpModule():
    global root
    root = Tk()

def tearDownModule():
    global root
    root.update_idletasks()
    root.destroy()
    del root


def add_call_counting(func):
    @wraps(func)
    def wrapped_func(*args, **kwargs):
        wrapped_func.call_args_list.append((args, kwargs))
        return func(*args, **kwargs)
    wrapped_func.call_args_list = []
    return wrapped_func


def _make_top_and_button(testobj):
    global root
    top = Toplevel(root)
    testobj.addCleanup(top.destroy)
    top.title("Test tooltip")
    button = Button(top, text='ToolTip test button')
    button.pack()
    testobj.addCleanup(button.destroy)
    top.lift()
    return top, button


class ToolTipBaseTest(unittest.TestCase):
    def setUp(self):
        self.top, self.button = _make_top_and_button(self)

    def test_base_class_is_unusable(self):
        global root
        top = Toplevel(root)
        self.addCleanup(top.destroy)

        button = Button(top, text='ToolTip test button')
        button.pack()
        self.addCleanup(button.destroy)

        with self.assertRaises(NotImplementedError):
            tooltip = TooltipBase(button)
            tooltip.showtip()


class HovertipTest(unittest.TestCase):
    def setUp(self):
        self.top, self.button = _make_top_and_button(self)

    def is_tipwindow_shown(self, tooltip):
        return tooltip.tipwindow and tooltip.tipwindow.winfo_viewable()

    def test_showtip(self):
        tooltip = Hovertip(self.button, 'ToolTip text')
        self.addCleanup(tooltip.hidetip)
        self.assertFalse(self.is_tipwindow_shown(tooltip))
        tooltip.showtip()
        self.assertTrue(self.is_tipwindow_shown(tooltip))

    def test_showtip_twice(self):
        tooltip = Hovertip(self.button, 'ToolTip text')
        self.addCleanup(tooltip.hidetip)
        self.assertFalse(self.is_tipwindow_shown(tooltip))
        tooltip.showtip()
        self.assertTrue(self.is_tipwindow_shown(tooltip))
        orig_tipwindow = tooltip.tipwindow
        tooltip.showtip()
        self.assertTrue(self.is_tipwindow_shown(tooltip))
        self.assertIs(tooltip.tipwindow, orig_tipwindow)

    def test_hidetip(self):
        tooltip = Hovertip(self.button, 'ToolTip text')
        self.addCleanup(tooltip.hidetip)
        tooltip.showtip()
        tooltip.hidetip()
        self.assertFalse(self.is_tipwindow_shown(tooltip))

    def test_showtip_on_mouse_enter_no_delay(self):
        tooltip = Hovertip(self.button, 'ToolTip text', hover_delay=None)
        self.addCleanup(tooltip.hidetip)
        tooltip.showtip = add_call_counting(tooltip.showtip)
        root.update()
        self.assertFalse(self.is_tipwindow_shown(tooltip))
        self.button.event_generate('<Enter>', x=0, y=0)
        root.update()
        self.assertTrue(self.is_tipwindow_shown(tooltip))
        self.assertGreater(len(tooltip.showtip.call_args_list), 0)

    def test_hover_with_delay(self):
        # Run multiple tests requiring an actual delay simultaneously.

        # Test #1: A hover tip with a non-zero delay appears after the delay.
        tooltip1 = Hovertip(self.button, 'ToolTip text', hover_delay=100)
        self.addCleanup(tooltip1.hidetip)
        tooltip1.showtip = add_call_counting(tooltip1.showtip)
        root.update()
        self.assertFalse(self.is_tipwindow_shown(tooltip1))
        self.button.event_generate('<Enter>', x=0, y=0)
        root.update()
        self.assertFalse(self.is_tipwindow_shown(tooltip1))

        # Test #2: A hover tip with a non-zero delay doesn't appear when
        # the mouse stops hovering over the base widget before the delay
        # expires.
        tooltip2 = Hovertip(self.button, 'ToolTip text', hover_delay=100)
        self.addCleanup(tooltip2.hidetip)
        tooltip2.showtip = add_call_counting(tooltip2.showtip)
        root.update()
        self.button.event_generate('<Enter>', x=0, y=0)
        root.update()
        self.button.event_generate('<Leave>', x=0, y=0)
        root.update()

        time.sleep(0.15)
        root.update()

        # Test #1 assertions.
        self.assertTrue(self.is_tipwindow_shown(tooltip1))
        self.assertGreater(len(tooltip1.showtip.call_args_list), 0)

        # Test #2 assertions.
        self.assertFalse(self.is_tipwindow_shown(tooltip2))
        self.assertEqual(tooltip2.showtip.call_args_list, [])

    def test_hidetip_on_mouse_leave(self):
        tooltip = Hovertip(self.button, 'ToolTip text', hover_delay=None)
        self.addCleanup(tooltip.hidetip)
        tooltip.showtip = add_call_counting(tooltip.showtip)
        root.update()
        self.button.event_generate('<Enter>', x=0, y=0)
        root.update()
        self.button.event_generate('<Leave>', x=0, y=0)
        root.update()
        self.assertFalse(self.is_tipwindow_shown(tooltip))
        self.assertGreater(len(tooltip.showtip.call_args_list), 0)


if __name__ == '__main__':
    unittest.main(verbosity=2)