import unittest
import tkinter
from tkinter import ttk, TclError
from test.support import requires, gc_collect
import sys

from test.test_ttk_textonly import MockTclObj
from tkinter.test.support import (AbstractTkTest, tk_version, get_tk_patchlevel,
                                  simulate_mouse_click, AbstractDefaultRootTest)
from tkinter.test.widget_tests import (add_standard_options,
    AbstractWidgetTest, StandardOptionsTests, IntegerSizeTests, PixelSizeTests,
    setUpModule)

requires('gui')


class StandardTtkOptionsTests(StandardOptionsTests):

    def test_configure_class(self):
        widget = self.create()
        self.assertEqual(widget['class'], '')
        errmsg='attempt to change read-only option'
        if get_tk_patchlevel(self.root) < (8, 6, 0, 'beta', 3):
            errmsg='Attempt to change read-only option'
        self.checkInvalidParam(widget, 'class', 'Foo', errmsg=errmsg)
        widget2 = self.create(class_='Foo')
        self.assertEqual(widget2['class'], 'Foo')

    def test_configure_padding(self):
        widget = self.create()
        self.checkParam(widget, 'padding', 0, expected=('0',))
        self.checkParam(widget, 'padding', 5, expected=('5',))
        self.checkParam(widget, 'padding', (5, 6), expected=('5', '6'))
        self.checkParam(widget, 'padding', (5, 6, 7),
                        expected=('5', '6', '7'))
        self.checkParam(widget, 'padding', (5, 6, 7, 8),
                        expected=('5', '6', '7', '8'))
        self.checkParam(widget, 'padding', ('5p', '6p', '7p', '8p'))
        self.checkParam(widget, 'padding', (), expected='')

    def test_configure_style(self):
        widget = self.create()
        self.assertEqual(widget['style'], '')
        errmsg = 'Layout Foo not found'
        if hasattr(self, 'default_orient'):
            errmsg = ('Layout %s.Foo not found' %
                      getattr(self, 'default_orient').title())
        self.checkInvalidParam(widget, 'style', 'Foo',
                errmsg=errmsg)
        widget2 = self.create(class_='Foo')
        self.assertEqual(widget2['class'], 'Foo')
        # XXX
        pass


class WidgetTest(AbstractTkTest, unittest.TestCase):
    """Tests methods available in every ttk widget."""

    def setUp(self):
        super().setUp()
        self.widget = ttk.Button(self.root, width=0, text="Text")
        self.widget.pack()

    def test_identify(self):
        self.widget.update()
        self.assertEqual(self.widget.identify(
            int(self.widget.winfo_width() / 2),
            int(self.widget.winfo_height() / 2)
            ), "label")
        self.assertEqual(self.widget.identify(-1, -1), "")

        self.assertRaises(tkinter.TclError, self.widget.identify, None, 5)
        self.assertRaises(tkinter.TclError, self.widget.identify, 5, None)
        self.assertRaises(tkinter.TclError, self.widget.identify, 5, '')

    def test_widget_state(self):
        # XXX not sure about the portability of all these tests
        self.assertEqual(self.widget.state(), ())
        self.assertEqual(self.widget.instate(['!disabled']), True)

        # changing from !disabled to disabled
        self.assertEqual(self.widget.state(['disabled']), ('!disabled', ))
        # no state change
        self.assertEqual(self.widget.state(['disabled']), ())
        # change back to !disable but also active
        self.assertEqual(self.widget.state(['!disabled', 'active']),
            ('!active', 'disabled'))
        # no state changes, again
        self.assertEqual(self.widget.state(['!disabled', 'active']), ())
        self.assertEqual(self.widget.state(['active', '!disabled']), ())

        def test_cb(arg1, **kw):
            return arg1, kw
        self.assertEqual(self.widget.instate(['!disabled'],
            test_cb, "hi", **{"msg": "there"}),
            ('hi', {'msg': 'there'}))

        # attempt to set invalid statespec
        currstate = self.widget.state()
        self.assertRaises(tkinter.TclError, self.widget.instate,
            ['badstate'])
        self.assertRaises(tkinter.TclError, self.widget.instate,
            ['disabled', 'badstate'])
        # verify that widget didn't change its state
        self.assertEqual(currstate, self.widget.state())

        # ensuring that passing None as state doesn't modify current state
        self.widget.state(['active', '!disabled'])
        self.assertEqual(self.widget.state(), ('active', ))


class AbstractToplevelTest(AbstractWidgetTest, PixelSizeTests):
    _conv_pixels = False


@add_standard_options(StandardTtkOptionsTests)
class FrameTest(AbstractToplevelTest, unittest.TestCase):
    OPTIONS = (
        'borderwidth', 'class', 'cursor', 'height',
        'padding', 'relief', 'style', 'takefocus',
        'width',
    )

    def create(self, **kwargs):
        return ttk.Frame(self.root, **kwargs)


@add_standard_options(StandardTtkOptionsTests)
class LabelFrameTest(AbstractToplevelTest, unittest.TestCase):
    OPTIONS = (
        'borderwidth', 'class', 'cursor', 'height',
        'labelanchor', 'labelwidget',
        'padding', 'relief', 'style', 'takefocus',
        'text', 'underline', 'width',
    )

    def create(self, **kwargs):
        return ttk.LabelFrame(self.root, **kwargs)

    def test_configure_labelanchor(self):
        widget = self.create()
        self.checkEnumParam(widget, 'labelanchor',
                'e', 'en', 'es', 'n', 'ne', 'nw', 's', 'se', 'sw', 'w', 'wn', 'ws',
                errmsg='Bad label anchor specification {}')
        self.checkInvalidParam(widget, 'labelanchor', 'center')

    def test_configure_labelwidget(self):
        widget = self.create()
        label = ttk.Label(self.root, text='Mupp', name='foo')
        self.checkParam(widget, 'labelwidget', label, expected='.foo')
        label.destroy()


class AbstractLabelTest(AbstractWidgetTest):

    def checkImageParam(self, widget, name):
        image = tkinter.PhotoImage(master=self.root, name='image1')
        image2 = tkinter.PhotoImage(master=self.root, name='image2')
        self.checkParam(widget, name, image, expected=('image1',))
        self.checkParam(widget, name, 'image1', expected=('image1',))
        self.checkParam(widget, name, (image,), expected=('image1',))
        self.checkParam(widget, name, (image, 'active', image2),
                        expected=('image1', 'active', 'image2'))
        self.checkParam(widget, name, 'image1 active image2',
                        expected=('image1', 'active', 'image2'))
        self.checkInvalidParam(widget, name, 'spam',
                errmsg='image "spam" doesn\'t exist')

    def test_configure_compound(self):
        options = 'none text image center top bottom left right'.split()
        errmsg = (
            'bad compound "{}": must be'
            f' {", ".join(options[:-1])}, or {options[-1]}'
            )
        widget = self.create()
        self.checkEnumParam(widget, 'compound', *options, errmsg=errmsg)

    def test_configure_state(self):
        widget = self.create()
        self.checkParams(widget, 'state', 'active', 'disabled', 'normal')

    def test_configure_width(self):
        widget = self.create()
        self.checkParams(widget, 'width', 402, -402, 0)


@add_standard_options(StandardTtkOptionsTests)
class LabelTest(AbstractLabelTest, unittest.TestCase):
    OPTIONS = (
        'anchor', 'background', 'borderwidth',
        'class', 'compound', 'cursor', 'font', 'foreground',
        'image', 'justify', 'padding', 'relief', 'state', 'style',
        'takefocus', 'text', 'textvariable',
        'underline', 'width', 'wraplength',
    )
    _conv_pixels = False

    def create(self, **kwargs):
        return ttk.Label(self.root, **kwargs)

    def test_configure_font(self):
        widget = self.create()
        self.checkParam(widget, 'font',
                        '-Adobe-Helvetica-Medium-R-Normal--*-120-*-*-*-*-*-*')


@add_standard_options(StandardTtkOptionsTests)
class ButtonTest(AbstractLabelTest, unittest.TestCase):
    OPTIONS = (
        'class', 'command', 'compound', 'cursor', 'default',
        'image', 'padding', 'state', 'style',
        'takefocus', 'text', 'textvariable',
        'underline', 'width',
    )

    def create(self, **kwargs):
        return ttk.Button(self.root, **kwargs)

    def test_configure_default(self):
        widget = self.create()
        self.checkEnumParam(widget, 'default', 'normal', 'active', 'disabled')

    def test_invoke(self):
        success = []
        btn = ttk.Button(self.root, command=lambda: success.append(1))
        btn.invoke()
        self.assertTrue(success)


@add_standard_options(StandardTtkOptionsTests)
class CheckbuttonTest(AbstractLabelTest, unittest.TestCase):
    OPTIONS = (
        'class', 'command', 'compound', 'cursor',
        'image',
        'offvalue', 'onvalue',
        'padding', 'state', 'style',
        'takefocus', 'text', 'textvariable',
        'underline', 'variable', 'width',
    )

    def create(self, **kwargs):
        return ttk.Checkbutton(self.root, **kwargs)

    def test_configure_offvalue(self):
        widget = self.create()
        self.checkParams(widget, 'offvalue', 1, 2.3, '', 'any string')

    def test_configure_onvalue(self):
        widget = self.create()
        self.checkParams(widget, 'onvalue', 1, 2.3, '', 'any string')

    def test_invoke(self):
        success = []
        def cb_test():
            success.append(1)
            return "cb test called"

        cbtn = ttk.Checkbutton(self.root, command=cb_test)
        # the variable automatically created by ttk.Checkbutton is actually
        # undefined till we invoke the Checkbutton
        self.assertEqual(cbtn.state(), ('alternate', ))
        self.assertRaises(tkinter.TclError, cbtn.tk.globalgetvar,
            cbtn['variable'])

        res = cbtn.invoke()
        self.assertEqual(res, "cb test called")
        self.assertEqual(cbtn['onvalue'],
            cbtn.tk.globalgetvar(cbtn['variable']))
        self.assertTrue(success)

        cbtn['command'] = ''
        res = cbtn.invoke()
        self.assertFalse(str(res))
        self.assertLessEqual(len(success), 1)
        self.assertEqual(cbtn['offvalue'],
            cbtn.tk.globalgetvar(cbtn['variable']))

    def test_unique_variables(self):
        frames = []
        buttons = []
        for i in range(2):
            f = ttk.Frame(self.root)
            f.pack()
            frames.append(f)
            for j in 'AB':
                b = ttk.Checkbutton(f, text=j)
                b.pack()
                buttons.append(b)
        variables = [str(b['variable']) for b in buttons]
        self.assertEqual(len(set(variables)), 4, variables)

    def test_unique_variables2(self):
        buttons = []
        f = ttk.Frame(self.root)
        f.pack()
        f = ttk.Frame(self.root)
        f.pack()
        for j in 'AB':
            b = tkinter.Checkbutton(f, text=j)
            b.pack()
            buttons.append(b)
        # Should be larger than the number of all previously created
        # tkinter.Checkbutton widgets:
        for j in range(100):
            b = ttk.Checkbutton(f, text=str(j))
            b.pack()
            buttons.append(b)
        names = [str(b) for b in buttons]
        self.assertEqual(len(set(names)), len(buttons), names)
        variables = [str(b['variable']) for b in buttons]
        self.assertEqual(len(set(variables)), len(buttons), variables)


@add_standard_options(IntegerSizeTests, StandardTtkOptionsTests)
class EntryTest(AbstractWidgetTest, unittest.TestCase):
    OPTIONS = (
        'background', 'class', 'cursor',
        'exportselection', 'font', 'foreground',
        'invalidcommand', 'justify',
        'show', 'state', 'style', 'takefocus', 'textvariable',
        'validate', 'validatecommand', 'width', 'xscrollcommand',
    )
    IDENTIFY_AS = 'Entry.field' if sys.platform == 'darwin' else 'textarea'

    def setUp(self):
        super().setUp()
        self.entry = self.create()

    def create(self, **kwargs):
        return ttk.Entry(self.root, **kwargs)

    def test_configure_invalidcommand(self):
        widget = self.create()
        self.checkCommandParam(widget, 'invalidcommand')

    def test_configure_show(self):
        widget = self.create()
        self.checkParam(widget, 'show', '*')
        self.checkParam(widget, 'show', '')
        self.checkParam(widget, 'show', ' ')

    def test_configure_state(self):
        widget = self.create()
        self.checkParams(widget, 'state',
                         'disabled', 'normal', 'readonly')

    def test_configure_validate(self):
        widget = self.create()
        self.checkEnumParam(widget, 'validate',
                'all', 'key', 'focus', 'focusin', 'focusout', 'none')

    def test_configure_validatecommand(self):
        widget = self.create()
        self.checkCommandParam(widget, 'validatecommand')

    def test_bbox(self):
        self.assertIsBoundingBox(self.entry.bbox(0))
        self.assertRaises(tkinter.TclError, self.entry.bbox, 'noindex')
        self.assertRaises(tkinter.TclError, self.entry.bbox, None)

    def test_identify(self):
        self.entry.pack()
        self.entry.update()

        # bpo-27313: macOS Cocoa widget differs from X, allow either
        self.assertEqual(self.entry.identify(5, 5), self.IDENTIFY_AS)
        self.assertEqual(self.entry.identify(-1, -1), "")

        self.assertRaises(tkinter.TclError, self.entry.identify, None, 5)
        self.assertRaises(tkinter.TclError, self.entry.identify, 5, None)
        self.assertRaises(tkinter.TclError, self.entry.identify, 5, '')

    def test_validation_options(self):
        success = []
        test_invalid = lambda: success.append(True)

        self.entry['validate'] = 'none'
        self.entry['validatecommand'] = lambda: False

        self.entry['invalidcommand'] = test_invalid
        self.entry.validate()
        self.assertTrue(success)

        self.entry['invalidcommand'] = ''
        self.entry.validate()
        self.assertEqual(len(success), 1)

        self.entry['invalidcommand'] = test_invalid
        self.entry['validatecommand'] = lambda: True
        self.entry.validate()
        self.assertEqual(len(success), 1)

        self.entry['validatecommand'] = ''
        self.entry.validate()
        self.assertEqual(len(success), 1)

        self.entry['validatecommand'] = True
        self.assertRaises(tkinter.TclError, self.entry.validate)

    def test_validation(self):
        validation = []
        def validate(to_insert):
            if not 'a' <= to_insert.lower() <= 'z':
                validation.append(False)
                return False
            validation.append(True)
            return True

        self.entry['validate'] = 'key'
        self.entry['validatecommand'] = self.entry.register(validate), '%S'

        self.entry.insert('end', 1)
        self.entry.insert('end', 'a')
        self.assertEqual(validation, [False, True])
        self.assertEqual(self.entry.get(), 'a')

    def test_revalidation(self):
        def validate(content):
            for letter in content:
                if not 'a' <= letter.lower() <= 'z':
                    return False
            return True

        self.entry['validatecommand'] = self.entry.register(validate), '%P'

        self.entry.insert('end', 'avocado')
        self.assertEqual(self.entry.validate(), True)
        self.assertEqual(self.entry.state(), ())

        self.entry.delete(0, 'end')
        self.assertEqual(self.entry.get(), '')

        self.entry.insert('end', 'a1b')
        self.assertEqual(self.entry.validate(), False)
        self.assertEqual(self.entry.state(), ('invalid', ))

        self.entry.delete(1)
        self.assertEqual(self.entry.validate(), True)
        self.assertEqual(self.entry.state(), ())


@add_standard_options(IntegerSizeTests, StandardTtkOptionsTests)
class ComboboxTest(EntryTest, unittest.TestCase):
    OPTIONS = (
        'background', 'class', 'cursor', 'exportselection',
        'font', 'foreground', 'height', 'invalidcommand',
        'justify', 'postcommand', 'show', 'state', 'style',
        'takefocus', 'textvariable',
        'validate', 'validatecommand', 'values',
        'width', 'xscrollcommand',
    )
    IDENTIFY_AS = 'Combobox.button' if sys.platform == 'darwin' else 'textarea'

    def setUp(self):
        super().setUp()
        self.combo = self.create()

    def create(self, **kwargs):
        return ttk.Combobox(self.root, **kwargs)

    def test_configure_height(self):
        widget = self.create()
        self.checkParams(widget, 'height', 100, 101.2, 102.6, -100, 0, '1i')

    def _show_drop_down_listbox(self):
        width = self.combo.winfo_width()
        x, y = width - 5, 5
        if sys.platform != 'darwin':  # there's no down arrow on macOS
            self.assertRegex(self.combo.identify(x, y), r'.*downarrow\Z')
        self.combo.event_generate('<ButtonPress-1>', x=x, y=y)
        self.combo.event_generate('<ButtonRelease-1>', x=x, y=y)
        self.combo.update_idletasks()

    def test_virtual_event(self):
        success = []

        self.combo['values'] = [1]
        self.combo.bind('<<ComboboxSelected>>',
            lambda evt: success.append(True))
        self.combo.pack()
        self.combo.update()

        height = self.combo.winfo_height()
        self._show_drop_down_listbox()
        self.combo.update()
        self.combo.event_generate('<Return>')
        self.combo.update()

        self.assertTrue(success)

    def test_configure_postcommand(self):
        success = []

        self.combo['postcommand'] = lambda: success.append(True)
        self.combo.pack()
        self.combo.update()

        self._show_drop_down_listbox()
        self.assertTrue(success)

        # testing postcommand removal
        self.combo['postcommand'] = ''
        self._show_drop_down_listbox()
        self.assertEqual(len(success), 1)

    def test_configure_values(self):
        def check_get_current(getval, currval):
            self.assertEqual(self.combo.get(), getval)
            self.assertEqual(self.combo.current(), currval)

        self.assertEqual(self.combo['values'], '')
        check_get_current('', -1)

        self.checkParam(self.combo, 'values', 'mon tue wed thur',
                        expected=('mon', 'tue', 'wed', 'thur'))
        self.checkParam(self.combo, 'values', ('mon', 'tue', 'wed', 'thur'))
        self.checkParam(self.combo, 'values', (42, 3.14, '', 'any string'))
        self.checkParam(self.combo, 'values', '')

        self.combo['values'] = ['a', 1, 'c']

        self.combo.set('c')
        check_get_current('c', 2)

        self.combo.current(0)
        check_get_current('a', 0)

        self.combo.set('d')
        check_get_current('d', -1)

        # testing values with empty string
        self.combo.set('')
        self.combo['values'] = (1, 2, '', 3)
        check_get_current('', 2)

        # testing values with empty string set through configure
        self.combo.configure(values=[1, '', 2])
        self.assertEqual(self.combo['values'],
                         ('1', '', '2') if self.wantobjects else
                         '1 {} 2')

        # testing values with spaces
        self.combo['values'] = ['a b', 'a\tb', 'a\nb']
        self.assertEqual(self.combo['values'],
                         ('a b', 'a\tb', 'a\nb') if self.wantobjects else
                         '{a b} {a\tb} {a\nb}')

        # testing values with special characters
        self.combo['values'] = [r'a\tb', '"a"', '} {']
        self.assertEqual(self.combo['values'],
                         (r'a\tb', '"a"', '} {') if self.wantobjects else
                         r'a\\tb {"a"} \}\ \{')

        # out of range
        self.assertRaises(tkinter.TclError, self.combo.current,
            len(self.combo['values']))
        # it expects an integer (or something that can be converted to int)
        self.assertRaises(tkinter.TclError, self.combo.current, '')

        # testing creating combobox with empty string in values
        combo2 = ttk.Combobox(self.root, values=[1, 2, ''])
        self.assertEqual(combo2['values'],
                         ('1', '2', '') if self.wantobjects else '1 2 {}')
        combo2.destroy()


@add_standard_options(IntegerSizeTests, StandardTtkOptionsTests)
class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
    OPTIONS = (
        'class', 'cursor', 'height',
        'orient', 'style', 'takefocus', 'width',
    )

    def setUp(self):
        super().setUp()
        self.paned = self.create()

    def create(self, **kwargs):
        return ttk.PanedWindow(self.root, **kwargs)

    def test_configure_orient(self):
        widget = self.create()
        self.assertEqual(str(widget['orient']), 'vertical')
        errmsg='attempt to change read-only option'
        if get_tk_patchlevel(self.root) < (8, 6, 0, 'beta', 3):
            errmsg='Attempt to change read-only option'
        self.checkInvalidParam(widget, 'orient', 'horizontal',
                errmsg=errmsg)
        widget2 = self.create(orient='horizontal')
        self.assertEqual(str(widget2['orient']), 'horizontal')

    def test_add(self):
        # attempt to add a child that is not a direct child of the paned window
        label = ttk.Label(self.paned)
        child = ttk.Label(label)
        self.assertRaises(tkinter.TclError, self.paned.add, child)
        label.destroy()
        child.destroy()
        # another attempt
        label = ttk.Label(self.root)
        child = ttk.Label(label)
        self.assertRaises(tkinter.TclError, self.paned.add, child)
        child.destroy()
        label.destroy()

        good_child = ttk.Label(self.root)
        self.paned.add(good_child)
        # re-adding a child is not accepted
        self.assertRaises(tkinter.TclError, self.paned.add, good_child)

        other_child = ttk.Label(self.paned)
        self.paned.add(other_child)
        self.assertEqual(self.paned.pane(0), self.paned.pane(1))
        self.assertRaises(tkinter.TclError, self.paned.pane, 2)
        good_child.destroy()
        other_child.destroy()
        self.assertRaises(tkinter.TclError, self.paned.pane, 0)

    def test_forget(self):
        self.assertRaises(tkinter.TclError, self.paned.forget, None)
        self.assertRaises(tkinter.TclError, self.paned.forget, 0)

        self.paned.add(ttk.Label(self.root))
        self.paned.forget(0)
        self.assertRaises(tkinter.TclError, self.paned.forget, 0)

    def test_insert(self):
        self.assertRaises(tkinter.TclError, self.paned.insert, None, 0)
        self.assertRaises(tkinter.TclError, self.paned.insert, 0, None)
        self.assertRaises(tkinter.TclError, self.paned.insert, 0, 0)

        child = ttk.Label(self.root)
        child2 = ttk.Label(self.root)
        child3 = ttk.Label(self.root)

        self.assertRaises(tkinter.TclError, self.paned.insert, 0, child)

        self.paned.insert('end', child2)
        self.paned.insert(0, child)
        self.assertEqual(self.paned.panes(), (str(child), str(child2)))

        self.paned.insert(0, child2)
        self.assertEqual(self.paned.panes(), (str(child2), str(child)))

        self.paned.insert('end', child3)
        self.assertEqual(self.paned.panes(),
            (str(child2), str(child), str(child3)))

        # reinserting a child should move it to its current position
        panes = self.paned.panes()
        self.paned.insert('end', child3)
        self.assertEqual(panes, self.paned.panes())

        # moving child3 to child2 position should result in child2 ending up
        # in previous child position and child ending up in previous child3
        # position
        self.paned.insert(child2, child3)
        self.assertEqual(self.paned.panes(),
            (str(child3), str(child2), str(child)))

    def test_pane(self):
        self.assertRaises(tkinter.TclError, self.paned.pane, 0)

        child = ttk.Label(self.root)
        self.paned.add(child)
        self.assertIsInstance(self.paned.pane(0), dict)
        self.assertEqual(self.paned.pane(0, weight=None),
                         0 if self.wantobjects else '0')
        # newer form for querying a single option
        self.assertEqual(self.paned.pane(0, 'weight'),
                         0 if self.wantobjects else '0')
        self.assertEqual(self.paned.pane(0), self.paned.pane(str(child)))

        self.assertRaises(tkinter.TclError, self.paned.pane, 0,
            badoption='somevalue')

    def test_sashpos(self):
        self.assertRaises(tkinter.TclError, self.paned.sashpos, None)
        self.assertRaises(tkinter.TclError, self.paned.sashpos, '')
        self.assertRaises(tkinter.TclError, self.paned.sashpos, 0)

        child = ttk.Label(self.paned, text='a')
        self.paned.add(child, weight=1)
        self.assertRaises(tkinter.TclError, self.paned.sashpos, 0)
        child2 = ttk.Label(self.paned, text='b')
        self.paned.add(child2)
        self.assertRaises(tkinter.TclError, self.paned.sashpos, 1)

        self.paned.pack(expand=True, fill='both')

        curr_pos = self.paned.sashpos(0)
        self.paned.sashpos(0, 1000)
        self.assertNotEqual(curr_pos, self.paned.sashpos(0))
        self.assertIsInstance(self.paned.sashpos(0), int)


@add_standard_options(StandardTtkOptionsTests)
class RadiobuttonTest(AbstractLabelTest, unittest.TestCase):
    OPTIONS = (
        'class', 'command', 'compound', 'cursor',
        'image',
        'padding', 'state', 'style',
        'takefocus', 'text', 'textvariable',
        'underline', 'value', 'variable', 'width',
    )

    def create(self, **kwargs):
        return ttk.Radiobutton(self.root, **kwargs)

    def test_configure_value(self):
        widget = self.create()
        self.checkParams(widget, 'value', 1, 2.3, '', 'any string')

    def test_configure_invoke(self):
        success = []
        def cb_test():
            success.append(1)
            return "cb test called"

        myvar = tkinter.IntVar(self.root)
        cbtn = ttk.Radiobutton(self.root, command=cb_test,
                               variable=myvar, value=0)
        cbtn2 = ttk.Radiobutton(self.root, command=cb_test,
                                variable=myvar, value=1)

        if self.wantobjects:
            conv = lambda x: x
        else:
            conv = int

        res = cbtn.invoke()
        self.assertEqual(res, "cb test called")
        self.assertEqual(conv(cbtn['value']), myvar.get())
        self.assertEqual(myvar.get(),
            conv(cbtn.tk.globalgetvar(cbtn['variable'])))
        self.assertTrue(success)

        cbtn2['command'] = ''
        res = cbtn2.invoke()
        self.assertEqual(str(res), '')
        self.assertLessEqual(len(success), 1)
        self.assertEqual(conv(cbtn2['value']), myvar.get())
        self.assertEqual(myvar.get(),
            conv(cbtn.tk.globalgetvar(cbtn['variable'])))

        self.assertEqual(str(cbtn['variable']), str(cbtn2['variable']))


class MenubuttonTest(AbstractLabelTest, unittest.TestCase):
    OPTIONS = (
        'class', 'compound', 'cursor', 'direction',
        'image', 'menu', 'padding', 'state', 'style',
        'takefocus', 'text', 'textvariable',
        'underline', 'width',
    )

    def create(self, **kwargs):
        return ttk.Menubutton(self.root, **kwargs)

    def test_direction(self):
        widget = self.create()
        self.checkEnumParam(widget, 'direction',
                'above', 'below', 'left', 'right', 'flush')

    def test_configure_menu(self):
        widget = self.create()
        menu = tkinter.Menu(widget, name='menu')
        self.checkParam(widget, 'menu', menu, conv=str)
        menu.destroy()


@add_standard_options(StandardTtkOptionsTests)
class ScaleTest(AbstractWidgetTest, unittest.TestCase):
    OPTIONS = (
        'class', 'command', 'cursor', 'from', 'length',
        'orient', 'style', 'takefocus', 'to', 'value', 'variable',
    )
    _conv_pixels = False
    default_orient = 'horizontal'

    def setUp(self):
        super().setUp()
        self.scale = self.create()
        self.scale.pack()
        self.scale.update()

    def create(self, **kwargs):
        return ttk.Scale(self.root, **kwargs)

    def test_configure_from(self):
        widget = self.create()
        self.checkFloatParam(widget, 'from', 100, 14.9, 15.1, conv=False)

    def test_configure_length(self):
        widget = self.create()
        self.checkPixelsParam(widget, 'length', 130, 131.2, 135.6, '5i')

    def test_configure_to(self):
        widget = self.create()
        self.checkFloatParam(widget, 'to', 300, 14.9, 15.1, -10, conv=False)

    def test_configure_value(self):
        widget = self.create()
        self.checkFloatParam(widget, 'value', 300, 14.9, 15.1, -10, conv=False)

    def test_custom_event(self):
        failure = [1, 1, 1] # will need to be empty

        funcid = self.scale.bind('<<RangeChanged>>', lambda evt: failure.pop())

        self.scale['from'] = 10
        self.scale['from_'] = 10
        self.scale['to'] = 3

        self.assertFalse(failure)

        failure = [1, 1, 1]
        self.scale.configure(from_=2, to=5)
        self.scale.configure(from_=0, to=-2)
        self.scale.configure(to=10)

        self.assertFalse(failure)

    def test_get(self):
        if self.wantobjects:
            conv = lambda x: x
        else:
            conv = float

        scale_width = self.scale.winfo_width()
        self.assertEqual(self.scale.get(scale_width, 0), self.scale['to'])

        self.assertEqual(conv(self.scale.get(0, 0)), conv(self.scale['from']))
        self.assertEqual(self.scale.get(), self.scale['value'])
        self.scale['value'] = 30
        self.assertEqual(self.scale.get(), self.scale['value'])

        self.assertRaises(tkinter.TclError, self.scale.get, '', 0)
        self.assertRaises(tkinter.TclError, self.scale.get, 0, '')

    def test_set(self):
        if self.wantobjects:
            conv = lambda x: x
        else:
            conv = float

        # set restricts the max/min values according to the current range
        max = conv(self.scale['to'])
        new_max = max + 10
        self.scale.set(new_max)
        self.assertEqual(conv(self.scale.get()), max)
        min = conv(self.scale['from'])
        self.scale.set(min - 1)
        self.assertEqual(conv(self.scale.get()), min)

        # changing directly the variable doesn't impose this limitation tho
        var = tkinter.DoubleVar(self.root)
        self.scale['variable'] = var
        var.set(max + 5)
        self.assertEqual(conv(self.scale.get()), var.get())
        self.assertEqual(conv(self.scale.get()), max + 5)
        del var
        gc_collect()  # For PyPy or other GCs.

        # the same happens with the value option
        self.scale['value'] = max + 10
        self.assertEqual(conv(self.scale.get()), max + 10)
        self.assertEqual(conv(self.scale.get()), conv(self.scale['value']))

        # nevertheless, note that the max/min values we can get specifying
        # x, y coords are the ones according to the current range
        self.assertEqual(conv(self.scale.get(0, 0)), min)
        self.assertEqual(conv(self.scale.get(self.scale.winfo_width(), 0)), max)

        self.assertRaises(tkinter.TclError, self.scale.set, None)


@add_standard_options(StandardTtkOptionsTests)
class ProgressbarTest(AbstractWidgetTest, unittest.TestCase):
    OPTIONS = (
        'class', 'cursor', 'orient', 'length',
        'mode', 'maximum', 'phase',
        'style', 'takefocus', 'value', 'variable',
    )
    _conv_pixels = False
    default_orient = 'horizontal'

    def create(self, **kwargs):
        return ttk.Progressbar(self.root, **kwargs)

    def test_configure_length(self):
        widget = self.create()
        self.checkPixelsParam(widget, 'length', 100.1, 56.7, '2i')

    def test_configure_maximum(self):
        widget = self.create()
        self.checkFloatParam(widget, 'maximum', 150.2, 77.7, 0, -10, conv=False)

    def test_configure_mode(self):
        widget = self.create()
        self.checkEnumParam(widget, 'mode', 'determinate', 'indeterminate')

    def test_configure_phase(self):
        # XXX
        pass

    def test_configure_value(self):
        widget = self.create()
        self.checkFloatParam(widget, 'value', 150.2, 77.7, 0, -10,
                             conv=False)


@unittest.skipIf(sys.platform == 'darwin',
                 'ttk.Scrollbar is special on MacOSX')
@add_standard_options(StandardTtkOptionsTests)
class ScrollbarTest(AbstractWidgetTest, unittest.TestCase):
    OPTIONS = (
        'class', 'command', 'cursor', 'orient', 'style', 'takefocus',
    )
    default_orient = 'vertical'

    def create(self, **kwargs):
        return ttk.Scrollbar(self.root, **kwargs)


@add_standard_options(IntegerSizeTests, StandardTtkOptionsTests)
class NotebookTest(AbstractWidgetTest, unittest.TestCase):
    OPTIONS = (
        'class', 'cursor', 'height', 'padding', 'style', 'takefocus', 'width',
    )

    def setUp(self):
        super().setUp()
        self.nb = self.create(padding=0)
        self.child1 = ttk.Label(self.root)
        self.child2 = ttk.Label(self.root)
        self.nb.add(self.child1, text='a')
        self.nb.add(self.child2, text='b')

    def create(self, **kwargs):
        return ttk.Notebook(self.root, **kwargs)

    def test_tab_identifiers(self):
        self.nb.forget(0)
        self.nb.hide(self.child2)
        self.assertRaises(tkinter.TclError, self.nb.tab, self.child1)
        self.assertEqual(self.nb.index('end'), 1)
        self.nb.add(self.child2)
        self.assertEqual(self.nb.index('end'), 1)
        self.nb.select(self.child2)

        self.assertTrue(self.nb.tab('current'))
        self.nb.add(self.child1, text='a')

        self.nb.pack()
        self.nb.update()
        if sys.platform == 'darwin':
            tb_idx = "@20,5"
        else:
            tb_idx = "@5,5"
        self.assertEqual(self.nb.tab(tb_idx), self.nb.tab('current'))

        for i in range(5, 100, 5):
            try:
                if self.nb.tab('@%d, 5' % i, text=None) == 'a':
                    break
            except tkinter.TclError:
                pass

        else:
            self.fail("Tab with text 'a' not found")

    def test_add_and_hidden(self):
        self.assertRaises(tkinter.TclError, self.nb.hide, -1)
        self.assertRaises(tkinter.TclError, self.nb.hide, 'hi')
        self.assertRaises(tkinter.TclError, self.nb.hide, None)
        self.assertRaises(tkinter.TclError, self.nb.add, None)
        self.assertRaises(tkinter.TclError, self.nb.add, ttk.Label(self.root),
            unknown='option')

        tabs = self.nb.tabs()
        self.nb.hide(self.child1)
        self.nb.add(self.child1)
        self.assertEqual(self.nb.tabs(), tabs)

        child = ttk.Label(self.root)
        self.nb.add(child, text='c')
        tabs = self.nb.tabs()

        curr = self.nb.index('current')
        # verify that the tab gets re-added at its previous position
        child2_index = self.nb.index(self.child2)
        self.nb.hide(self.child2)
        self.nb.add(self.child2)
        self.assertEqual(self.nb.tabs(), tabs)
        self.assertEqual(self.nb.index(self.child2), child2_index)
        self.assertEqual(str(self.child2), self.nb.tabs()[child2_index])
        # but the tab next to it (not hidden) is the one selected now
        self.assertEqual(self.nb.index('current'), curr + 1)

    def test_forget(self):
        self.assertRaises(tkinter.TclError, self.nb.forget, -1)
        self.assertRaises(tkinter.TclError, self.nb.forget, 'hi')
        self.assertRaises(tkinter.TclError, self.nb.forget, None)

        tabs = self.nb.tabs()
        child1_index = self.nb.index(self.child1)
        self.nb.forget(self.child1)
        self.assertNotIn(str(self.child1), self.nb.tabs())
        self.assertEqual(len(tabs) - 1, len(self.nb.tabs()))

        self.nb.add(self.child1)
        self.assertEqual(self.nb.index(self.child1), 1)
        self.assertNotEqual(child1_index, self.nb.index(self.child1))

    def test_index(self):
        self.assertRaises(tkinter.TclError, self.nb.index, -1)
        self.assertRaises(tkinter.TclError, self.nb.index, None)

        self.assertIsInstance(self.nb.index('end'), int)
        self.assertEqual(self.nb.index(self.child1), 0)
        self.assertEqual(self.nb.index(self.child2), 1)
        self.assertEqual(self.nb.index('end'), 2)

    def test_insert(self):
        # moving tabs
        tabs = self.nb.tabs()
        self.nb.insert(1, tabs[0])
        self.assertEqual(self.nb.tabs(), (tabs[1], tabs[0]))
        self.nb.insert(self.child1, self.child2)
        self.assertEqual(self.nb.tabs(), tabs)
        self.nb.insert('end', self.child1)
        self.assertEqual(self.nb.tabs(), (tabs[1], tabs[0]))
        self.nb.insert('end', 0)
        self.assertEqual(self.nb.tabs(), tabs)
        # bad moves
        self.assertRaises(tkinter.TclError, self.nb.insert, 2, tabs[0])
        self.assertRaises(tkinter.TclError, self.nb.insert, -1, tabs[0])

        # new tab
        child3 = ttk.Label(self.root)
        self.nb.insert(1, child3)
        self.assertEqual(self.nb.tabs(), (tabs[0], str(child3), tabs[1]))
        self.nb.forget(child3)
        self.assertEqual(self.nb.tabs(), tabs)
        self.nb.insert(self.child1, child3)
        self.assertEqual(self.nb.tabs(), (str(child3), ) + tabs)
        self.nb.forget(child3)
        self.assertRaises(tkinter.TclError, self.nb.insert, 2, child3)
        self.assertRaises(tkinter.TclError, self.nb.insert, -1, child3)

        # bad inserts
        self.assertRaises(tkinter.TclError, self.nb.insert, 'end', None)
        self.assertRaises(tkinter.TclError, self.nb.insert, None, 0)
        self.assertRaises(tkinter.TclError, self.nb.insert, None, None)

    def test_select(self):
        self.nb.pack()
        self.nb.update()

        success = []
        tab_changed = []

        self.child1.bind('<Unmap>', lambda evt: success.append(True))
        self.nb.bind('<<NotebookTabChanged>>',
            lambda evt: tab_changed.append(True))

        self.assertEqual(self.nb.select(), str(self.child1))
        self.nb.select(self.child2)
        self.assertTrue(success)
        self.assertEqual(self.nb.select(), str(self.child2))

        self.nb.update()
        self.assertTrue(tab_changed)

    def test_tab(self):
        self.assertRaises(tkinter.TclError, self.nb.tab, -1)
        self.assertRaises(tkinter.TclError, self.nb.tab, 'notab')
        self.assertRaises(tkinter.TclError, self.nb.tab, None)

        self.assertIsInstance(self.nb.tab(self.child1), dict)
        self.assertEqual(self.nb.tab(self.child1, text=None), 'a')
        # newer form for querying a single option
        self.assertEqual(self.nb.tab(self.child1, 'text'), 'a')
        self.nb.tab(self.child1, text='abc')
        self.assertEqual(self.nb.tab(self.child1, text=None), 'abc')
        self.assertEqual(self.nb.tab(self.child1, 'text'), 'abc')

    def test_configure_tabs(self):
        self.assertEqual(len(self.nb.tabs()), 2)

        self.nb.forget(self.child1)
        self.nb.forget(self.child2)

        self.assertEqual(self.nb.tabs(), ())

    def test_traversal(self):
        self.nb.pack()
        self.nb.update()

        self.nb.select(0)

        focus_identify_as = 'focus' if sys.platform != 'darwin' else ''
        self.assertEqual(self.nb.identify(5, 5), focus_identify_as)
        simulate_mouse_click(self.nb, 5, 5)
        self.nb.focus_force()
        self.nb.event_generate('<Control-Tab>')
        self.assertEqual(self.nb.select(), str(self.child2))
        self.nb.focus_force()
        self.nb.event_generate('<Shift-Control-Tab>')
        self.assertEqual(self.nb.select(), str(self.child1))
        self.nb.focus_force()
        self.nb.event_generate('<Shift-Control-Tab>')
        self.assertEqual(self.nb.select(), str(self.child2))

        self.nb.tab(self.child1, text='a', underline=0)
        self.nb.tab(self.child2, text='e', underline=0)
        self.nb.enable_traversal()
        self.nb.focus_force()
        self.assertEqual(self.nb.identify(5, 5), focus_identify_as)
        simulate_mouse_click(self.nb, 5, 5)
        # on macOS Emacs-style keyboard shortcuts are region-dependent;
        # let's use the regular arrow keys instead
        if sys.platform == 'darwin':
            begin = '<Left>'
            end = '<Right>'
        else:
            begin = '<Alt-a>'
            end = '<Alt-e>'
        self.nb.event_generate(begin)
        self.assertEqual(self.nb.select(), str(self.child1))
        self.nb.event_generate(end)
        self.assertEqual(self.nb.select(), str(self.child2))


@add_standard_options(IntegerSizeTests, StandardTtkOptionsTests)
class SpinboxTest(EntryTest, unittest.TestCase):
    OPTIONS = (
        'background', 'class', 'command', 'cursor', 'exportselection',
        'font', 'foreground', 'format', 'from',  'increment',
        'invalidcommand', 'justify', 'show', 'state', 'style',
        'takefocus', 'textvariable', 'to', 'validate', 'validatecommand',
        'values', 'width', 'wrap', 'xscrollcommand',
    )
    IDENTIFY_AS = 'Spinbox.field' if sys.platform == 'darwin' else 'textarea'

    def setUp(self):
        super().setUp()
        self.spin = self.create()
        self.spin.pack()

    def create(self, **kwargs):
        return ttk.Spinbox(self.root, **kwargs)

    def _click_increment_arrow(self):
        width = self.spin.winfo_width()
        height = self.spin.winfo_height()
        x = width - 5
        y = height//2 - 5
        self.assertRegex(self.spin.identify(x, y), r'.*uparrow\Z')
        self.spin.event_generate('<ButtonPress-1>', x=x, y=y)
        self.spin.event_generate('<ButtonRelease-1>', x=x, y=y)
        self.spin.update_idletasks()

    def _click_decrement_arrow(self):
        width = self.spin.winfo_width()
        height = self.spin.winfo_height()
        x = width - 5
        y = height//2 + 4
        self.assertRegex(self.spin.identify(x, y), r'.*downarrow\Z')
        self.spin.event_generate('<ButtonPress-1>', x=x, y=y)
        self.spin.event_generate('<ButtonRelease-1>', x=x, y=y)
        self.spin.update_idletasks()

    def test_configure_command(self):
        success = []

        self.spin['command'] = lambda: success.append(True)
        self.spin.update()
        self._click_increment_arrow()
        self.spin.update()
        self.assertTrue(success)

        self._click_decrement_arrow()
        self.assertEqual(len(success), 2)

        # testing postcommand removal
        self.spin['command'] = ''
        self.spin.update_idletasks()
        self._click_increment_arrow()
        self._click_decrement_arrow()
        self.spin.update()
        self.assertEqual(len(success), 2)

    def test_configure_to(self):
        self.spin['from'] = 0
        self.spin['to'] = 5
        self.spin.set(4)
        self.spin.update()
        self._click_increment_arrow()  # 5

        self.assertEqual(self.spin.get(), '5')

        self._click_increment_arrow()  # 5
        self.assertEqual(self.spin.get(), '5')

    def test_configure_from(self):
        self.spin['from'] = 1
        self.spin['to'] = 10
        self.spin.set(2)
        self.spin.update()
        self._click_decrement_arrow()  # 1
        self.assertEqual(self.spin.get(), '1')
        self._click_decrement_arrow()  # 1
        self.assertEqual(self.spin.get(), '1')

    def test_configure_increment(self):
        self.spin['from'] = 0
        self.spin['to'] = 10
        self.spin['increment'] = 4
        self.spin.set(1)
        self.spin.update()

        self._click_increment_arrow()  # 5
        self.assertEqual(self.spin.get(), '5')
        self.spin['increment'] = 2
        self.spin.update()
        self._click_decrement_arrow()  # 3
        self.assertEqual(self.spin.get(), '3')

    def test_configure_format(self):
        self.spin.set(1)
        self.spin['format'] = '%10.3f'
        self.spin.update()
        self._click_increment_arrow()
        value = self.spin.get()

        self.assertEqual(len(value), 10)
        self.assertEqual(value.index('.'), 6)

        self.spin['format'] = ''
        self.spin.update()
        self._click_increment_arrow()
        value = self.spin.get()
        self.assertTrue('.' not in value)
        self.assertEqual(len(value), 1)

    def test_configure_wrap(self):
        self.spin['to'] = 10
        self.spin['from'] = 1
        self.spin.set(1)
        self.spin['wrap'] = True
        self.spin.update()

        self._click_decrement_arrow()
        self.assertEqual(self.spin.get(), '10')

        self._click_increment_arrow()
        self.assertEqual(self.spin.get(), '1')

        self.spin['wrap'] = False
        self.spin.update()

        self._click_decrement_arrow()
        self.assertEqual(self.spin.get(), '1')

    def test_configure_values(self):
        self.assertEqual(self.spin['values'], '')
        self.checkParam(self.spin, 'values', 'mon tue wed thur',
                        expected=('mon', 'tue', 'wed', 'thur'))
        self.checkParam(self.spin, 'values', ('mon', 'tue', 'wed', 'thur'))
        self.checkParam(self.spin, 'values', (42, 3.14, '', 'any string'))
        self.checkParam(self.spin, 'values', '')

        self.spin['values'] = ['a', 1, 'c']

        # test incrementing / decrementing values
        self.spin.set('a')
        self.spin.update()
        self._click_increment_arrow()
        self.assertEqual(self.spin.get(), '1')

        self._click_decrement_arrow()
        self.assertEqual(self.spin.get(), 'a')

        # testing values with empty string set through configure
        self.spin.configure(values=[1, '', 2])
        self.assertEqual(self.spin['values'],
                         ('1', '', '2') if self.wantobjects else
                         '1 {} 2')

        # testing values with spaces
        self.spin['values'] = ['a b', 'a\tb', 'a\nb']
        self.assertEqual(self.spin['values'],
                         ('a b', 'a\tb', 'a\nb') if self.wantobjects else
                         '{a b} {a\tb} {a\nb}')

        # testing values with special characters
        self.spin['values'] = [r'a\tb', '"a"', '} {']
        self.assertEqual(self.spin['values'],
                         (r'a\tb', '"a"', '} {') if self.wantobjects else
                         r'a\\tb {"a"} \}\ \{')

        # testing creating spinbox with empty string in values
        spin2 = ttk.Spinbox(self.root, values=[1, 2, ''])
        self.assertEqual(spin2['values'],
                         ('1', '2', '') if self.wantobjects else '1 2 {}')
        spin2.destroy()


@add_standard_options(StandardTtkOptionsTests)
class TreeviewTest(AbstractWidgetTest, unittest.TestCase):
    OPTIONS = (
        'class', 'columns', 'cursor', 'displaycolumns',
        'height', 'padding', 'selectmode', 'show',
        'style', 'takefocus', 'xscrollcommand', 'yscrollcommand',
    )

    def setUp(self):
        super().setUp()
        self.tv = self.create(padding=0)

    def create(self, **kwargs):
        return ttk.Treeview(self.root, **kwargs)

    def test_configure_columns(self):
        widget = self.create()
        self.checkParam(widget, 'columns', 'a b c',
                        expected=('a', 'b', 'c'))
        self.checkParam(widget, 'columns', ('a', 'b', 'c'))
        self.checkParam(widget, 'columns', '')

    def test_configure_displaycolumns(self):
        widget = self.create()
        widget['columns'] = ('a', 'b', 'c')
        self.checkParam(widget, 'displaycolumns', 'b a c',
                        expected=('b', 'a', 'c'))
        self.checkParam(widget, 'displaycolumns', ('b', 'a', 'c'))
        self.checkParam(widget, 'displaycolumns', '#all',
                        expected=('#all',))
        self.checkParam(widget, 'displaycolumns', (2, 1, 0))
        self.checkInvalidParam(widget, 'displaycolumns', ('a', 'b', 'd'),
                               errmsg='Invalid column index d')
        self.checkInvalidParam(widget, 'displaycolumns', (1, 2, 3),
                               errmsg='Column index 3 out of bounds')
        self.checkInvalidParam(widget, 'displaycolumns', (1, -2),
                               errmsg='Column index -2 out of bounds')

    def test_configure_height(self):
        widget = self.create()
        self.checkPixelsParam(widget, 'height', 100, -100, 0, '3c', conv=False)
        self.checkPixelsParam(widget, 'height', 101.2, 102.6, conv=False)

    def test_configure_selectmode(self):
        widget = self.create()
        self.checkEnumParam(widget, 'selectmode',
                            'none', 'browse', 'extended')

    def test_configure_show(self):
        widget = self.create()
        self.checkParam(widget, 'show', 'tree headings',
                        expected=('tree', 'headings'))
        self.checkParam(widget, 'show', ('tree', 'headings'))
        self.checkParam(widget, 'show', ('headings', 'tree'))
        self.checkParam(widget, 'show', 'tree', expected=('tree',))
        self.checkParam(widget, 'show', 'headings', expected=('headings',))

    def test_bbox(self):
        self.tv.pack()
        self.assertEqual(self.tv.bbox(''), '')
        self.tv.update()

        item_id = self.tv.insert('', 'end')
        children = self.tv.get_children()
        self.assertTrue(children)

        bbox = self.tv.bbox(children[0])
        self.assertIsBoundingBox(bbox)

        # compare width in bboxes
        self.tv['columns'] = ['test']
        self.tv.column('test', width=50)
        bbox_column0 = self.tv.bbox(children[0], 0)
        root_width = self.tv.column('#0', width=None)
        if not self.wantobjects:
            root_width = int(root_width)
        self.assertEqual(bbox_column0[0], bbox[0] + root_width)

        # verify that bbox of a closed item is the empty string
        child1 = self.tv.insert(item_id, 'end')
        self.assertEqual(self.tv.bbox(child1), '')

    def test_children(self):
        # no children yet, should get an empty tuple
        self.assertEqual(self.tv.get_children(), ())

        item_id = self.tv.insert('', 'end')
        self.assertIsInstance(self.tv.get_children(), tuple)
        self.assertEqual(self.tv.get_children()[0], item_id)

        # add item_id and child3 as children of child2
        child2 = self.tv.insert('', 'end')
        child3 = self.tv.insert('', 'end')
        self.tv.set_children(child2, item_id, child3)
        self.assertEqual(self.tv.get_children(child2), (item_id, child3))

        # child3 has child2 as parent, thus trying to set child2 as a children
        # of child3 should result in an error
        self.assertRaises(tkinter.TclError,
            self.tv.set_children, child3, child2)

        # remove child2 children
        self.tv.set_children(child2)
        self.assertEqual(self.tv.get_children(child2), ())

        # remove root's children
        self.tv.set_children('')
        self.assertEqual(self.tv.get_children(), ())

    def test_column(self):
        # return a dict with all options/values
        self.assertIsInstance(self.tv.column('#0'), dict)
        # return a single value of the given option
        if self.wantobjects:
            self.assertIsInstance(self.tv.column('#0', width=None), int)
        # set a new value for an option
        self.tv.column('#0', width=10)
        # testing new way to get option value
        self.assertEqual(self.tv.column('#0', 'width'),
                         10 if self.wantobjects else '10')
        self.assertEqual(self.tv.column('#0', width=None),
                         10 if self.wantobjects else '10')
        # check read-only option
        self.assertRaises(tkinter.TclError, self.tv.column, '#0', id='X')

        self.assertRaises(tkinter.TclError, self.tv.column, 'invalid')
        invalid_kws = [
            {'unknown_option': 'some value'},  {'stretch': 'wrong'},
            {'anchor': 'wrong'}, {'width': 'wrong'}, {'minwidth': 'wrong'}
        ]
        for kw in invalid_kws:
            self.assertRaises(tkinter.TclError, self.tv.column, '#0',
                **kw)

    def test_delete(self):
        self.assertRaises(tkinter.TclError, self.tv.delete, '#0')

        item_id = self.tv.insert('', 'end')
        item2 = self.tv.insert(item_id, 'end')
        self.assertEqual(self.tv.get_children(), (item_id, ))
        self.assertEqual(self.tv.get_children(item_id), (item2, ))

        self.tv.delete(item_id)
        self.assertFalse(self.tv.get_children())

        # reattach should fail
        self.assertRaises(tkinter.TclError,
            self.tv.reattach, item_id, '', 'end')

        # test multiple item delete
        item1 = self.tv.insert('', 'end')
        item2 = self.tv.insert('', 'end')
        self.assertEqual(self.tv.get_children(), (item1, item2))

        self.tv.delete(item1, item2)
        self.assertFalse(self.tv.get_children())

    def test_detach_reattach(self):
        item_id = self.tv.insert('', 'end')
        item2 = self.tv.insert(item_id, 'end')

        # calling detach without items is valid, although it does nothing
        prev = self.tv.get_children()
        self.tv.detach() # this should do nothing
        self.assertEqual(prev, self.tv.get_children())

        self.assertEqual(self.tv.get_children(), (item_id, ))
        self.assertEqual(self.tv.get_children(item_id), (item2, ))

        # detach item with children
        self.tv.detach(item_id)
        self.assertFalse(self.tv.get_children())

        # reattach item with children
        self.tv.reattach(item_id, '', 'end')
        self.assertEqual(self.tv.get_children(), (item_id, ))
        self.assertEqual(self.tv.get_children(item_id), (item2, ))

        # move a children to the root
        self.tv.move(item2, '', 'end')
        self.assertEqual(self.tv.get_children(), (item_id, item2))
        self.assertEqual(self.tv.get_children(item_id), ())

        # bad values
        self.assertRaises(tkinter.TclError,
            self.tv.reattach, 'nonexistent', '', 'end')
        self.assertRaises(tkinter.TclError,
            self.tv.detach, 'nonexistent')
        self.assertRaises(tkinter.TclError,
            self.tv.reattach, item2, 'otherparent', 'end')
        self.assertRaises(tkinter.TclError,
            self.tv.reattach, item2, '', 'invalid')

        # multiple detach
        self.tv.detach(item_id, item2)
        self.assertEqual(self.tv.get_children(), ())
        self.assertEqual(self.tv.get_children(item_id), ())

    def test_exists(self):
        self.assertEqual(self.tv.exists('something'), False)
        self.assertEqual(self.tv.exists(''), True)
        self.assertEqual(self.tv.exists({}), False)

        # the following will make a tk.call equivalent to
        # tk.call(treeview, "exists") which should result in an error
        # in the tcl interpreter since tk requires an item.
        self.assertRaises(tkinter.TclError, self.tv.exists, None)

    def test_focus(self):
        # nothing is focused right now
        self.assertEqual(self.tv.focus(), '')

        item1 = self.tv.insert('', 'end')
        self.tv.focus(item1)
        self.assertEqual(self.tv.focus(), item1)

        self.tv.delete(item1)
        self.assertEqual(self.tv.focus(), '')

        # try focusing inexistent item
        self.assertRaises(tkinter.TclError, self.tv.focus, 'hi')

    def test_heading(self):
        # check a dict is returned
        self.assertIsInstance(self.tv.heading('#0'), dict)

        # check a value is returned
        self.tv.heading('#0', text='hi')
        self.assertEqual(self.tv.heading('#0', 'text'), 'hi')
        self.assertEqual(self.tv.heading('#0', text=None), 'hi')

        # invalid option
        self.assertRaises(tkinter.TclError, self.tv.heading, '#0',
            background=None)
        # invalid value
        self.assertRaises(tkinter.TclError, self.tv.heading, '#0',
            anchor=1)

    def test_heading_callback(self):
        def simulate_heading_click(x, y):
            if tk_version >= (8, 6):
                self.assertEqual(self.tv.identify_column(x), '#0')
                self.assertEqual(self.tv.identify_region(x, y), 'heading')
            simulate_mouse_click(self.tv, x, y)
            self.tv.update()

        success = [] # no success for now

        self.tv.pack()
        self.tv.heading('#0', command=lambda: success.append(True))
        self.tv.column('#0', width=100)
        self.tv.update()

        # assuming that the coords (5, 5) fall into heading #0
        simulate_heading_click(5, 5)
        if not success:
            self.fail("The command associated to the treeview heading wasn't "
                "invoked.")

        success = []
        commands = self.tv.master._tclCommands
        self.tv.heading('#0', command=str(self.tv.heading('#0', command=None)))
        self.assertEqual(commands, self.tv.master._tclCommands)
        simulate_heading_click(5, 5)
        if not success:
            self.fail("The command associated to the treeview heading wasn't "
                "invoked.")

        # XXX The following raises an error in a tcl interpreter, but not in
        # Python
        #self.tv.heading('#0', command='I dont exist')
        #simulate_heading_click(5, 5)

    def test_index(self):
        # item 'what' doesn't exist
        self.assertRaises(tkinter.TclError, self.tv.index, 'what')

        self.assertEqual(self.tv.index(''), 0)

        item1 = self.tv.insert('', 'end')
        item2 = self.tv.insert('', 'end')
        c1 = self.tv.insert(item1, 'end')
        c2 = self.tv.insert(item1, 'end')
        self.assertEqual(self.tv.index(item1), 0)
        self.assertEqual(self.tv.index(c1), 0)
        self.assertEqual(self.tv.index(c2), 1)
        self.assertEqual(self.tv.index(item2), 1)

        self.tv.move(item2, '', 0)
        self.assertEqual(self.tv.index(item2), 0)
        self.assertEqual(self.tv.index(item1), 1)

        # check that index still works even after its parent and siblings
        # have been detached
        self.tv.detach(item1)
        self.assertEqual(self.tv.index(c2), 1)
        self.tv.detach(c1)
        self.assertEqual(self.tv.index(c2), 0)

        # but it fails after item has been deleted
        self.tv.delete(item1)
        self.assertRaises(tkinter.TclError, self.tv.index, c2)

    def test_insert_item(self):
        # parent 'none' doesn't exist
        self.assertRaises(tkinter.TclError, self.tv.insert, 'none', 'end')

        # open values
        self.assertRaises(tkinter.TclError, self.tv.insert, '', 'end',
            open='')
        self.assertRaises(tkinter.TclError, self.tv.insert, '', 'end',
            open='please')
        self.assertFalse(self.tv.delete(self.tv.insert('', 'end', open=True)))
        self.assertFalse(self.tv.delete(self.tv.insert('', 'end', open=False)))

        # invalid index
        self.assertRaises(tkinter.TclError, self.tv.insert, '', 'middle')

        # trying to duplicate item id is invalid
        itemid = self.tv.insert('', 'end', 'first-item')
        self.assertEqual(itemid, 'first-item')
        self.assertRaises(tkinter.TclError, self.tv.insert, '', 'end',
            'first-item')
        self.assertRaises(tkinter.TclError, self.tv.insert, '', 'end',
            MockTclObj('first-item'))

        # unicode values
        value = '\xe1ba'
        item = self.tv.insert('', 'end', values=(value, ))
        self.assertEqual(self.tv.item(item, 'values'),
                         (value,) if self.wantobjects else value)
        self.assertEqual(self.tv.item(item, values=None),
                         (value,) if self.wantobjects else value)

        self.tv.item(item, values=self.root.splitlist(self.tv.item(item, values=None)))
        self.assertEqual(self.tv.item(item, values=None),
                         (value,) if self.wantobjects else value)

        self.assertIsInstance(self.tv.item(item), dict)

        # erase item values
        self.tv.item(item, values='')
        self.assertFalse(self.tv.item(item, values=None))

        # item tags
        item = self.tv.insert('', 'end', tags=[1, 2, value])
        self.assertEqual(self.tv.item(item, tags=None),
                         ('1', '2', value) if self.wantobjects else
                         '1 2 %s' % value)
        self.tv.item(item, tags=[])
        self.assertFalse(self.tv.item(item, tags=None))
        self.tv.item(item, tags=(1, 2))
        self.assertEqual(self.tv.item(item, tags=None),
                         ('1', '2') if self.wantobjects else '1 2')

        # values with spaces
        item = self.tv.insert('', 'end', values=('a b c',
            '%s %s' % (value, value)))
        self.assertEqual(self.tv.item(item, values=None),
            ('a b c', '%s %s' % (value, value)) if self.wantobjects else
            '{a b c} {%s %s}' % (value, value))

        # text
        self.assertEqual(self.tv.item(
            self.tv.insert('', 'end', text="Label here"), text=None),
            "Label here")
        self.assertEqual(self.tv.item(
            self.tv.insert('', 'end', text=value), text=None),
            value)

        # test for values which are not None
        itemid = self.tv.insert('', 'end', 0)
        self.assertEqual(itemid, '0')
        itemid = self.tv.insert('', 'end', 0.0)
        self.assertEqual(itemid, '0.0')
        # this is because False resolves to 0 and element with 0 iid is already present
        self.assertRaises(tkinter.TclError, self.tv.insert, '', 'end', False)
        self.assertRaises(tkinter.TclError, self.tv.insert, '', 'end', '')

    def test_selection(self):
        self.assertRaises(TypeError, self.tv.selection, 'spam')
        # item 'none' doesn't exist
        self.assertRaises(tkinter.TclError, self.tv.selection_set, 'none')
        self.assertRaises(tkinter.TclError, self.tv.selection_add, 'none')
        self.assertRaises(tkinter.TclError, self.tv.selection_remove, 'none')
        self.assertRaises(tkinter.TclError, self.tv.selection_toggle, 'none')

        item1 = self.tv.insert('', 'end')
        item2 = self.tv.insert('', 'end')
        c1 = self.tv.insert(item1, 'end')
        c2 = self.tv.insert(item1, 'end')
        c3 = self.tv.insert(item1, 'end')
        self.assertEqual(self.tv.selection(), ())

        self.tv.selection_set(c1, item2)
        self.assertEqual(self.tv.selection(), (c1, item2))
        self.tv.selection_set(c2)
        self.assertEqual(self.tv.selection(), (c2,))

        self.tv.selection_add(c1, item2)
        self.assertEqual(self.tv.selection(), (c1, c2, item2))
        self.tv.selection_add(item1)
        self.assertEqual(self.tv.selection(), (item1, c1, c2, item2))
        self.tv.selection_add()
        self.assertEqual(self.tv.selection(), (item1, c1, c2, item2))

        self.tv.selection_remove(item1, c3)
        self.assertEqual(self.tv.selection(), (c1, c2, item2))
        self.tv.selection_remove(c2)
        self.assertEqual(self.tv.selection(), (c1, item2))
        self.tv.selection_remove()
        self.assertEqual(self.tv.selection(), (c1, item2))

        self.tv.selection_toggle(c1, c3)
        self.assertEqual(self.tv.selection(), (c3, item2))
        self.tv.selection_toggle(item2)
        self.assertEqual(self.tv.selection(), (c3,))
        self.tv.selection_toggle()
        self.assertEqual(self.tv.selection(), (c3,))

        self.tv.insert('', 'end', id='with spaces')
        self.tv.selection_set('with spaces')
        self.assertEqual(self.tv.selection(), ('with spaces',))

        self.tv.insert('', 'end', id='{brace')
        self.tv.selection_set('{brace')
        self.assertEqual(self.tv.selection(), ('{brace',))

        self.tv.insert('', 'end', id='unicode\u20ac')
        self.tv.selection_set('unicode\u20ac')
        self.assertEqual(self.tv.selection(), ('unicode\u20ac',))

        self.tv.insert('', 'end', id=b'bytes\xe2\x82\xac')
        self.tv.selection_set(b'bytes\xe2\x82\xac')
        self.assertEqual(self.tv.selection(), ('bytes\xe2\x82\xac',))

        self.tv.selection_set()
        self.assertEqual(self.tv.selection(), ())

        # Old interface
        self.tv.selection_set((c1, item2))
        self.assertEqual(self.tv.selection(), (c1, item2))
        self.tv.selection_add((c1, item1))
        self.assertEqual(self.tv.selection(), (item1, c1, item2))
        self.tv.selection_remove((item1, c3))
        self.assertEqual(self.tv.selection(), (c1, item2))
        self.tv.selection_toggle((c1, c3))
        self.assertEqual(self.tv.selection(), (c3, item2))

    def test_set(self):
        self.tv['columns'] = ['A', 'B']
        item = self.tv.insert('', 'end', values=['a', 'b'])
        self.assertEqual(self.tv.set(item), {'A': 'a', 'B': 'b'})

        self.tv.set(item, 'B', 'a')
        self.assertEqual(self.tv.item(item, values=None),
                         ('a', 'a') if self.wantobjects else 'a a')

        self.tv['columns'] = ['B']
        self.assertEqual(self.tv.set(item), {'B': 'a'})

        self.tv.set(item, 'B', 'b')
        self.assertEqual(self.tv.set(item, column='B'), 'b')
        self.assertEqual(self.tv.item(item, values=None),
                         ('b', 'a') if self.wantobjects else 'b a')

        self.tv.set(item, 'B', 123)
        self.assertEqual(self.tv.set(item, 'B'),
                         123 if self.wantobjects else '123')
        self.assertEqual(self.tv.item(item, values=None),
                         (123, 'a') if self.wantobjects else '123 a')
        self.assertEqual(self.tv.set(item),
                         {'B': 123} if self.wantobjects else {'B': '123'})

        # inexistent column
        self.assertRaises(tkinter.TclError, self.tv.set, item, 'A')
        self.assertRaises(tkinter.TclError, self.tv.set, item, 'A', 'b')

        # inexistent item
        self.assertRaises(tkinter.TclError, self.tv.set, 'notme')

    def test_tag_bind(self):
        events = []
        item1 = self.tv.insert('', 'end', tags=['call'])
        item2 = self.tv.insert('', 'end', tags=['call'])
        self.tv.tag_bind('call', '<ButtonPress-1>',
            lambda evt: events.append(1))
        self.tv.tag_bind('call', '<ButtonRelease-1>',
            lambda evt: events.append(2))

        self.tv.pack()
        self.tv.update()

        pos_y = set()
        found = set()
        for i in range(0, 100, 10):
            if len(found) == 2: # item1 and item2 already found
                break
            item_id = self.tv.identify_row(i)
            if item_id and item_id not in found:
                pos_y.add(i)
                found.add(item_id)

        self.assertEqual(len(pos_y), 2) # item1 and item2 y pos
        for y in pos_y:
            simulate_mouse_click(self.tv, 0, y)

        # by now there should be 4 things in the events list, since each
        # item had a bind for two events that were simulated above
        self.assertEqual(len(events), 4)
        for evt in zip(events[::2], events[1::2]):
            self.assertEqual(evt, (1, 2))

    def test_tag_configure(self):
        # Just testing parameter passing for now
        self.assertRaises(TypeError, self.tv.tag_configure)
        self.assertRaises(tkinter.TclError, self.tv.tag_configure,
            'test', sky='blue')
        self.tv.tag_configure('test', foreground='blue')
        self.assertEqual(str(self.tv.tag_configure('test', 'foreground')),
            'blue')
        self.assertEqual(str(self.tv.tag_configure('test', foreground=None)),
            'blue')
        self.assertIsInstance(self.tv.tag_configure('test'), dict)

    def test_tag_has(self):
        item1 = self.tv.insert('', 'end', text='Item 1', tags=['tag1'])
        item2 = self.tv.insert('', 'end', text='Item 2', tags=['tag2'])
        self.assertRaises(TypeError, self.tv.tag_has)
        self.assertRaises(TclError, self.tv.tag_has, 'tag1', 'non-existing')
        self.assertTrue(self.tv.tag_has('tag1', item1))
        self.assertFalse(self.tv.tag_has('tag1', item2))
        self.assertFalse(self.tv.tag_has('tag2', item1))
        self.assertTrue(self.tv.tag_has('tag2', item2))
        self.assertFalse(self.tv.tag_has('tag3', item1))
        self.assertFalse(self.tv.tag_has('tag3', item2))
        self.assertEqual(self.tv.tag_has('tag1'), (item1,))
        self.assertEqual(self.tv.tag_has('tag2'), (item2,))
        self.assertEqual(self.tv.tag_has('tag3'), ())


@add_standard_options(StandardTtkOptionsTests)
class SeparatorTest(AbstractWidgetTest, unittest.TestCase):
    OPTIONS = (
        'class', 'cursor', 'orient', 'style', 'takefocus',
        # 'state'?
    )
    default_orient = 'horizontal'

    def create(self, **kwargs):
        return ttk.Separator(self.root, **kwargs)


@add_standard_options(StandardTtkOptionsTests)
class SizegripTest(AbstractWidgetTest, unittest.TestCase):
    OPTIONS = (
        'class', 'cursor', 'style', 'takefocus',
        # 'state'?
    )

    def create(self, **kwargs):
        return ttk.Sizegrip(self.root, **kwargs)


class DefaultRootTest(AbstractDefaultRootTest, unittest.TestCase):

    def test_frame(self):
        self._test_widget(ttk.Frame)

    def test_label(self):
        self._test_widget(ttk.Label)


tests_gui = (
        ButtonTest, CheckbuttonTest, ComboboxTest, EntryTest,
        FrameTest, LabelFrameTest, LabelTest, MenubuttonTest,
        NotebookTest, PanedWindowTest, ProgressbarTest,
        RadiobuttonTest, ScaleTest, ScrollbarTest, SeparatorTest,
        SizegripTest, SpinboxTest, TreeviewTest, WidgetTest, DefaultRootTest,
        )

if __name__ == "__main__":
    unittest.main()
