from django.contrib.admin import ModelAdmin, TabularInline
from django.contrib.admin.helpers import InlineAdminForm
from django.contrib.admin.tests import AdminSeleniumTestCase
from django.contrib.auth.models import Permission, User
from django.contrib.contenttypes.models import ContentType
from django.test import RequestFactory, TestCase, override_settings
from django.urls import reverse

from .admin import InnerInline, site as admin_site
from .models import (
    Author, BinaryTree, Book, Chapter, Child, ChildModel1, ChildModel2,
    Fashionista, FootNote, Holder, Holder2, Holder3, Holder4, Inner, Inner2,
    Inner3, Inner4Stacked, Inner4Tabular, Novel, OutfitItem, Parent,
    ParentModelWithCustomPk, Person, Poll, Profile, ProfileCollection,
    Question, Sighting, SomeChildModel, SomeParentModel, Teacher,
)

INLINE_CHANGELINK_HTML = 'class="inlinechangelink">Change</a>'


class TestDataMixin:

    @classmethod
    def setUpTestData(cls):
        cls.superuser = User.objects.create_superuser(username='super', email='super@example.com', password='secret')


@override_settings(ROOT_URLCONF='admin_inlines.urls')
class TestInline(TestDataMixin, TestCase):
    factory = RequestFactory()

    @classmethod
    def setUpTestData(cls):
        super().setUpTestData()
        cls.holder = Holder.objects.create(dummy=13)
        Inner.objects.create(dummy=42, holder=cls.holder)

    def setUp(self):
        self.client.force_login(self.superuser)

    def test_can_delete(self):
        """
        can_delete should be passed to inlineformset factory.
        """
        response = self.client.get(
            reverse('admin:admin_inlines_holder_change', args=(self.holder.id,))
        )
        inner_formset = response.context['inline_admin_formsets'][0].formset
        expected = InnerInline.can_delete
        actual = inner_formset.can_delete
        self.assertEqual(expected, actual, 'can_delete must be equal')

    def test_readonly_stacked_inline_label(self):
        """Bug #13174."""
        holder = Holder.objects.create(dummy=42)
        Inner.objects.create(holder=holder, dummy=42, readonly='')
        response = self.client.get(
            reverse('admin:admin_inlines_holder_change', args=(holder.id,))
        )
        self.assertContains(response, '<label>Inner readonly label:</label>')

    def test_many_to_many_inlines(self):
        "Autogenerated many-to-many inlines are displayed correctly (#13407)"
        response = self.client.get(reverse('admin:admin_inlines_author_add'))
        # The heading for the m2m inline block uses the right text
        self.assertContains(response, '<h2>Author-book relationships</h2>')
        # The "add another" label is correct
        self.assertContains(response, 'Add another Author-book relationship')
        # The '+' is dropped from the autogenerated form prefix (Author_books+)
        self.assertContains(response, 'id="id_Author_books-TOTAL_FORMS"')

    def test_inline_primary(self):
        person = Person.objects.create(firstname='Imelda')
        item = OutfitItem.objects.create(name='Shoes')
        # Imelda likes shoes, but can't carry her own bags.
        data = {
            'shoppingweakness_set-TOTAL_FORMS': 1,
            'shoppingweakness_set-INITIAL_FORMS': 0,
            'shoppingweakness_set-MAX_NUM_FORMS': 0,
            '_save': 'Save',
            'person': person.id,
            'max_weight': 0,
            'shoppingweakness_set-0-item': item.id,
        }
        response = self.client.post(reverse('admin:admin_inlines_fashionista_add'), data)
        self.assertEqual(response.status_code, 302)
        self.assertEqual(len(Fashionista.objects.filter(person__firstname='Imelda')), 1)

    def test_tabular_inline_column_css_class(self):
        """
        Field names are included in the context to output a field-specific
        CSS class name in the column headers.
        """
        response = self.client.get(reverse('admin:admin_inlines_poll_add'))
        text_field, call_me_field = list(response.context['inline_admin_formset'].fields())
        # Editable field.
        self.assertEqual(text_field['name'], 'text')
        self.assertContains(response, '<th class="column-text required">')
        # Read-only field.
        self.assertEqual(call_me_field['name'], 'call_me')
        self.assertContains(response, '<th class="column-call_me">')

    def test_custom_form_tabular_inline_label(self):
        """
        A model form with a form field specified (TitleForm.title1) should have
        its label rendered in the tabular inline.
        """
        response = self.client.get(reverse('admin:admin_inlines_titlecollection_add'))
        self.assertContains(response, '<th class="column-title1 required">Title1</th>', html=True)

    def test_custom_form_tabular_inline_overridden_label(self):
        """
        SomeChildModelForm.__init__() overrides the label of a form field.
        That label is displayed in the TabularInline.
        """
        response = self.client.get(reverse('admin:admin_inlines_someparentmodel_add'))
        field = list(response.context['inline_admin_formset'].fields())[0]
        self.assertEqual(field['label'], 'new label')
        self.assertContains(response, '<th class="column-name required">New label</th>', html=True)

    def test_tabular_non_field_errors(self):
        """
        non_field_errors are displayed correctly, including the correct value
        for colspan.
        """
        data = {
            'title_set-TOTAL_FORMS': 1,
            'title_set-INITIAL_FORMS': 0,
            'title_set-MAX_NUM_FORMS': 0,
            '_save': 'Save',
            'title_set-0-title1': 'a title',
            'title_set-0-title2': 'a different title',
        }
        response = self.client.post(reverse('admin:admin_inlines_titlecollection_add'), data)
        # Here colspan is "4": two fields (title1 and title2), one hidden field and the delete checkbox.
        self.assertContains(
            response,
            '<tr><td colspan="4"><ul class="errorlist nonfield">'
            '<li>The two titles must be the same</li></ul></td></tr>'
        )

    def test_no_parent_callable_lookup(self):
        """Admin inline `readonly_field` shouldn't invoke parent ModelAdmin callable"""
        # Identically named callable isn't present in the parent ModelAdmin,
        # rendering of the add view shouldn't explode
        response = self.client.get(reverse('admin:admin_inlines_novel_add'))
        self.assertEqual(response.status_code, 200)
        # View should have the child inlines section
        self.assertContains(
            response,
            '<div class="js-inline-admin-formset inline-group" id="chapter_set-group"'
        )

    def test_callable_lookup(self):
        """Admin inline should invoke local callable when its name is listed in readonly_fields"""
        response = self.client.get(reverse('admin:admin_inlines_poll_add'))
        self.assertEqual(response.status_code, 200)
        # Add parent object view should have the child inlines section
        self.assertContains(
            response,
            '<div class="js-inline-admin-formset inline-group" id="question_set-group"'
        )
        # The right callable should be used for the inline readonly_fields
        # column cells
        self.assertContains(response, '<p>Callable in QuestionInline</p>')

    def test_help_text(self):
        """
        The inlines' model field help texts are displayed when using both the
        stacked and tabular layouts.
        """
        response = self.client.get(reverse('admin:admin_inlines_holder4_add'))
        self.assertContains(response, '<div class="help">Awesome stacked help text is awesome.</div>', 4)
        self.assertContains(
            response,
            '<img src="/static/admin/img/icon-unknown.svg" '
            'class="help help-tooltip" width="10" height="10" '
            'alt="(Awesome tabular help text is awesome.)" '
            'title="Awesome tabular help text is awesome.">',
            1
        )
        # ReadOnly fields
        response = self.client.get(reverse('admin:admin_inlines_capofamiglia_add'))
        self.assertContains(
            response,
            '<img src="/static/admin/img/icon-unknown.svg" '
            'class="help help-tooltip" width="10" height="10" '
            'alt="(Help text for ReadOnlyInline)" '
            'title="Help text for ReadOnlyInline">',
            1
        )

    def test_tabular_model_form_meta_readonly_field(self):
        """
        Tabular inlines use ModelForm.Meta.help_texts and labels for read-only
        fields.
        """
        response = self.client.get(reverse('admin:admin_inlines_someparentmodel_add'))
        self.assertContains(
            response,
            '<img src="/static/admin/img/icon-unknown.svg" '
            'class="help help-tooltip" width="10" height="10" '
            'alt="(Help text from ModelForm.Meta)" '
            'title="Help text from ModelForm.Meta">'
        )
        self.assertContains(response, 'Label from ModelForm.Meta')

    def test_inline_hidden_field_no_column(self):
        """#18263 -- Make sure hidden fields don't get a column in tabular inlines"""
        parent = SomeParentModel.objects.create(name='a')
        SomeChildModel.objects.create(name='b', position='0', parent=parent)
        SomeChildModel.objects.create(name='c', position='1', parent=parent)
        response = self.client.get(reverse('admin:admin_inlines_someparentmodel_change', args=(parent.pk,)))
        self.assertNotContains(response, '<td class="field-position">')
        self.assertInHTML(
            '<input id="id_somechildmodel_set-1-position" '
            'name="somechildmodel_set-1-position" type="hidden" value="1">',
            response.rendered_content,
        )

    def test_non_related_name_inline(self):
        """
        Multiple inlines with related_name='+' have correct form prefixes.
        """
        response = self.client.get(reverse('admin:admin_inlines_capofamiglia_add'))
        self.assertContains(response, '<input type="hidden" name="-1-0-id" id="id_-1-0-id">', html=True)
        self.assertContains(
            response,
            '<input type="hidden" name="-1-0-capo_famiglia" id="id_-1-0-capo_famiglia">',
            html=True
        )
        self.assertContains(
            response,
            '<input id="id_-1-0-name" type="text" class="vTextField" name="-1-0-name" maxlength="100">',
            html=True
        )
        self.assertContains(response, '<input type="hidden" name="-2-0-id" id="id_-2-0-id">', html=True)
        self.assertContains(
            response,
            '<input type="hidden" name="-2-0-capo_famiglia" id="id_-2-0-capo_famiglia">',
            html=True
        )
        self.assertContains(
            response,
            '<input id="id_-2-0-name" type="text" class="vTextField" name="-2-0-name" maxlength="100">',
            html=True
        )

    @override_settings(USE_L10N=True, USE_THOUSAND_SEPARATOR=True)
    def test_localize_pk_shortcut(self):
        """
        The "View on Site" link is correct for locales that use thousand
        separators.
        """
        holder = Holder.objects.create(pk=123456789, dummy=42)
        inner = Inner.objects.create(pk=987654321, holder=holder, dummy=42, readonly='')
        response = self.client.get(reverse('admin:admin_inlines_holder_change', args=(holder.id,)))
        inner_shortcut = 'r/%s/%s/' % (ContentType.objects.get_for_model(inner).pk, inner.pk)
        self.assertContains(response, inner_shortcut)

    def test_custom_pk_shortcut(self):
        """
        The "View on Site" link is correct for models with a custom primary key
        field.
        """
        parent = ParentModelWithCustomPk.objects.create(my_own_pk="foo", name="Foo")
        child1 = ChildModel1.objects.create(my_own_pk="bar", name="Bar", parent=parent)
        child2 = ChildModel2.objects.create(my_own_pk="baz", name="Baz", parent=parent)
        response = self.client.get(reverse('admin:admin_inlines_parentmodelwithcustompk_change', args=('foo',)))
        child1_shortcut = 'r/%s/%s/' % (ContentType.objects.get_for_model(child1).pk, child1.pk)
        child2_shortcut = 'r/%s/%s/' % (ContentType.objects.get_for_model(child2).pk, child2.pk)
        self.assertContains(response, child1_shortcut)
        self.assertContains(response, child2_shortcut)

    def test_create_inlines_on_inherited_model(self):
        """
        An object can be created with inlines when it inherits another class.
        """
        data = {
            'name': 'Martian',
            'sighting_set-TOTAL_FORMS': 1,
            'sighting_set-INITIAL_FORMS': 0,
            'sighting_set-MAX_NUM_FORMS': 0,
            'sighting_set-0-place': 'Zone 51',
            '_save': 'Save',
        }
        response = self.client.post(reverse('admin:admin_inlines_extraterrestrial_add'), data)
        self.assertEqual(response.status_code, 302)
        self.assertEqual(Sighting.objects.filter(et__name='Martian').count(), 1)

    def test_custom_get_extra_form(self):
        bt_head = BinaryTree.objects.create(name="Tree Head")
        BinaryTree.objects.create(name="First Child", parent=bt_head)
        # The maximum number of forms should respect 'get_max_num' on the
        # ModelAdmin
        max_forms_input = (
            '<input id="id_binarytree_set-MAX_NUM_FORMS" '
            'name="binarytree_set-MAX_NUM_FORMS" type="hidden" value="%d">'
        )
        # The total number of forms will remain the same in either case
        total_forms_hidden = (
            '<input id="id_binarytree_set-TOTAL_FORMS" '
            'name="binarytree_set-TOTAL_FORMS" type="hidden" value="2">'
        )
        response = self.client.get(reverse('admin:admin_inlines_binarytree_add'))
        self.assertInHTML(max_forms_input % 3, response.rendered_content)
        self.assertInHTML(total_forms_hidden, response.rendered_content)

        response = self.client.get(reverse('admin:admin_inlines_binarytree_change', args=(bt_head.id,)))
        self.assertInHTML(max_forms_input % 2, response.rendered_content)
        self.assertInHTML(total_forms_hidden, response.rendered_content)

    def test_min_num(self):
        """
        min_num and extra determine number of forms.
        """
        class MinNumInline(TabularInline):
            model = BinaryTree
            min_num = 2
            extra = 3

        modeladmin = ModelAdmin(BinaryTree, admin_site)
        modeladmin.inlines = [MinNumInline]
        min_forms = (
            '<input id="id_binarytree_set-MIN_NUM_FORMS" '
            'name="binarytree_set-MIN_NUM_FORMS" type="hidden" value="2">'
        )
        total_forms = (
            '<input id="id_binarytree_set-TOTAL_FORMS" '
            'name="binarytree_set-TOTAL_FORMS" type="hidden" value="5">'
        )
        request = self.factory.get(reverse('admin:admin_inlines_binarytree_add'))
        request.user = User(username='super', is_superuser=True)
        response = modeladmin.changeform_view(request)
        self.assertInHTML(min_forms, response.rendered_content)
        self.assertInHTML(total_forms, response.rendered_content)

    def test_custom_min_num(self):
        bt_head = BinaryTree.objects.create(name="Tree Head")
        BinaryTree.objects.create(name="First Child", parent=bt_head)

        class MinNumInline(TabularInline):
            model = BinaryTree
            extra = 3

            def get_min_num(self, request, obj=None, **kwargs):
                if obj:
                    return 5
                return 2

        modeladmin = ModelAdmin(BinaryTree, admin_site)
        modeladmin.inlines = [MinNumInline]
        min_forms = (
            '<input id="id_binarytree_set-MIN_NUM_FORMS" '
            'name="binarytree_set-MIN_NUM_FORMS" type="hidden" value="%d">'
        )
        total_forms = (
            '<input id="id_binarytree_set-TOTAL_FORMS" '
            'name="binarytree_set-TOTAL_FORMS" type="hidden" value="%d">'
        )
        request = self.factory.get(reverse('admin:admin_inlines_binarytree_add'))
        request.user = User(username='super', is_superuser=True)
        response = modeladmin.changeform_view(request)
        self.assertInHTML(min_forms % 2, response.rendered_content)
        self.assertInHTML(total_forms % 5, response.rendered_content)

        request = self.factory.get(reverse('admin:admin_inlines_binarytree_change', args=(bt_head.id,)))
        request.user = User(username='super', is_superuser=True)
        response = modeladmin.changeform_view(request, object_id=str(bt_head.id))
        self.assertInHTML(min_forms % 5, response.rendered_content)
        self.assertInHTML(total_forms % 8, response.rendered_content)

    def test_inline_nonauto_noneditable_pk(self):
        response = self.client.get(reverse('admin:admin_inlines_author_add'))
        self.assertContains(
            response,
            '<input id="id_nonautopkbook_set-0-rand_pk" '
            'name="nonautopkbook_set-0-rand_pk" type="hidden">',
            html=True
        )
        self.assertContains(
            response,
            '<input id="id_nonautopkbook_set-2-0-rand_pk" '
            'name="nonautopkbook_set-2-0-rand_pk" type="hidden">',
            html=True
        )

    def test_inline_nonauto_noneditable_inherited_pk(self):
        response = self.client.get(reverse('admin:admin_inlines_author_add'))
        self.assertContains(
            response,
            '<input id="id_nonautopkbookchild_set-0-nonautopkbook_ptr" '
            'name="nonautopkbookchild_set-0-nonautopkbook_ptr" type="hidden">',
            html=True
        )
        self.assertContains(
            response,
            '<input id="id_nonautopkbookchild_set-2-nonautopkbook_ptr" '
            'name="nonautopkbookchild_set-2-nonautopkbook_ptr" type="hidden">',
            html=True
        )

    def test_inline_editable_pk(self):
        response = self.client.get(reverse('admin:admin_inlines_author_add'))
        self.assertContains(
            response,
            '<input class="vIntegerField" id="id_editablepkbook_set-0-manual_pk" '
            'name="editablepkbook_set-0-manual_pk" type="number">',
            html=True, count=1
        )
        self.assertContains(
            response,
            '<input class="vIntegerField" id="id_editablepkbook_set-2-0-manual_pk" '
            'name="editablepkbook_set-2-0-manual_pk" type="number">',
            html=True, count=1
        )

    def test_stacked_inline_edit_form_contains_has_original_class(self):
        holder = Holder.objects.create(dummy=1)
        holder.inner_set.create(dummy=1)
        response = self.client.get(reverse('admin:admin_inlines_holder_change', args=(holder.pk,)))
        self.assertContains(
            response,
            '<div class="inline-related has_original" id="inner_set-0">',
            count=1
        )
        self.assertContains(
            response,
            '<div class="inline-related" id="inner_set-1">',
            count=1
        )

    def test_inlines_show_change_link_registered(self):
        "Inlines `show_change_link` for registered models when enabled."
        holder = Holder4.objects.create(dummy=1)
        item1 = Inner4Stacked.objects.create(dummy=1, holder=holder)
        item2 = Inner4Tabular.objects.create(dummy=1, holder=holder)
        items = (
            ('inner4stacked', item1.pk),
            ('inner4tabular', item2.pk),
        )
        response = self.client.get(reverse('admin:admin_inlines_holder4_change', args=(holder.pk,)))
        self.assertTrue(response.context['inline_admin_formset'].opts.has_registered_model)
        for model, pk in items:
            url = reverse('admin:admin_inlines_%s_change' % model, args=(pk,))
            self.assertContains(response, '<a href="%s" %s' % (url, INLINE_CHANGELINK_HTML))

    def test_inlines_show_change_link_unregistered(self):
        "Inlines `show_change_link` disabled for unregistered models."
        parent = ParentModelWithCustomPk.objects.create(my_own_pk="foo", name="Foo")
        ChildModel1.objects.create(my_own_pk="bar", name="Bar", parent=parent)
        ChildModel2.objects.create(my_own_pk="baz", name="Baz", parent=parent)
        response = self.client.get(reverse('admin:admin_inlines_parentmodelwithcustompk_change', args=('foo',)))
        self.assertFalse(response.context['inline_admin_formset'].opts.has_registered_model)
        self.assertNotContains(response, INLINE_CHANGELINK_HTML)

    def test_tabular_inline_show_change_link_false_registered(self):
        "Inlines `show_change_link` disabled by default."
        poll = Poll.objects.create(name="New poll")
        Question.objects.create(poll=poll)
        response = self.client.get(reverse('admin:admin_inlines_poll_change', args=(poll.pk,)))
        self.assertTrue(response.context['inline_admin_formset'].opts.has_registered_model)
        self.assertNotContains(response, INLINE_CHANGELINK_HTML)

    def test_noneditable_inline_has_field_inputs(self):
        """Inlines without change permission shows field inputs on add form."""
        response = self.client.get(reverse('admin:admin_inlines_novelreadonlychapter_add'))
        self.assertContains(
            response,
            '<input type="text" name="chapter_set-0-name" '
            'class="vTextField" maxlength="40" id="id_chapter_set-0-name">',
            html=True
        )


@override_settings(ROOT_URLCONF='admin_inlines.urls')
class TestInlineMedia(TestDataMixin, TestCase):

    def setUp(self):
        self.client.force_login(self.superuser)

    def test_inline_media_only_base(self):
        holder = Holder(dummy=13)
        holder.save()
        Inner(dummy=42, holder=holder).save()
        change_url = reverse('admin:admin_inlines_holder_change', args=(holder.id,))
        response = self.client.get(change_url)
        self.assertContains(response, 'my_awesome_admin_scripts.js')

    def test_inline_media_only_inline(self):
        holder = Holder3(dummy=13)
        holder.save()
        Inner3(dummy=42, holder=holder).save()
        change_url = reverse('admin:admin_inlines_holder3_change', args=(holder.id,))
        response = self.client.get(change_url)
        self.assertEqual(
            response.context['inline_admin_formsets'][0].media._js,
            [
                'admin/js/vendor/jquery/jquery.min.js',
                'admin/js/jquery.init.js',
                'admin/js/inlines.min.js',
                'my_awesome_inline_scripts.js',
                'custom_number.js',
            ]
        )
        self.assertContains(response, 'my_awesome_inline_scripts.js')

    def test_all_inline_media(self):
        holder = Holder2(dummy=13)
        holder.save()
        Inner2(dummy=42, holder=holder).save()
        change_url = reverse('admin:admin_inlines_holder2_change', args=(holder.id,))
        response = self.client.get(change_url)
        self.assertContains(response, 'my_awesome_admin_scripts.js')
        self.assertContains(response, 'my_awesome_inline_scripts.js')


@override_settings(ROOT_URLCONF='admin_inlines.urls')
class TestInlineAdminForm(TestCase):

    def test_immutable_content_type(self):
        """Regression for #9362
        The problem depends only on InlineAdminForm and its "original"
        argument, so we can safely set the other arguments to None/{}. We just
        need to check that the content_type argument of Child isn't altered by
        the internals of the inline form."""

        sally = Teacher.objects.create(name='Sally')
        john = Parent.objects.create(name='John')
        joe = Child.objects.create(name='Joe', teacher=sally, parent=john)

        iaf = InlineAdminForm(None, None, {}, {}, joe)
        parent_ct = ContentType.objects.get_for_model(Parent)
        self.assertEqual(iaf.original.content_type, parent_ct)


@override_settings(ROOT_URLCONF='admin_inlines.urls')
class TestInlineProtectedOnDelete(TestDataMixin, TestCase):

    def setUp(self):
        self.client.force_login(self.superuser)

    def test_deleting_inline_with_protected_delete_does_not_validate(self):
        lotr = Novel.objects.create(name='Lord of the rings')
        chapter = Chapter.objects.create(novel=lotr, name='Many Meetings')
        foot_note = FootNote.objects.create(chapter=chapter, note='yadda yadda')

        change_url = reverse('admin:admin_inlines_novel_change', args=(lotr.id,))
        response = self.client.get(change_url)
        data = {
            'name': lotr.name,
            'chapter_set-TOTAL_FORMS': 1,
            'chapter_set-INITIAL_FORMS': 1,
            'chapter_set-MAX_NUM_FORMS': 1000,
            '_save': 'Save',
            'chapter_set-0-id': chapter.id,
            'chapter_set-0-name': chapter.name,
            'chapter_set-0-novel': lotr.id,
            'chapter_set-0-DELETE': 'on'
        }
        response = self.client.post(change_url, data)
        self.assertContains(response, "Deleting chapter %s would require deleting "
                            "the following protected related objects: foot note %s"
                            % (chapter, foot_note))


@override_settings(ROOT_URLCONF='admin_inlines.urls')
class TestInlinePermissions(TestCase):
    """
    Make sure the admin respects permissions for objects that are edited
    inline. Refs #8060.
    """

    @classmethod
    def setUpTestData(cls):
        cls.user = User(username='admin', is_staff=True, is_active=True)
        cls.user.set_password('secret')
        cls.user.save()

        cls.author_ct = ContentType.objects.get_for_model(Author)
        cls.holder_ct = ContentType.objects.get_for_model(Holder2)
        cls.book_ct = ContentType.objects.get_for_model(Book)
        cls.inner_ct = ContentType.objects.get_for_model(Inner2)

        # User always has permissions to add and change Authors, and Holders,
        # the main (parent) models of the inlines. Permissions on the inlines
        # vary per test.
        permission = Permission.objects.get(codename='add_author', content_type=cls.author_ct)
        cls.user.user_permissions.add(permission)
        permission = Permission.objects.get(codename='change_author', content_type=cls.author_ct)
        cls.user.user_permissions.add(permission)
        permission = Permission.objects.get(codename='add_holder2', content_type=cls.holder_ct)
        cls.user.user_permissions.add(permission)
        permission = Permission.objects.get(codename='change_holder2', content_type=cls.holder_ct)
        cls.user.user_permissions.add(permission)

        author = Author.objects.create(pk=1, name='The Author')
        book = author.books.create(name='The inline Book')
        cls.author_change_url = reverse('admin:admin_inlines_author_change', args=(author.id,))
        # Get the ID of the automatically created intermediate model for the Author-Book m2m
        author_book_auto_m2m_intermediate = Author.books.through.objects.get(author=author, book=book)
        cls.author_book_auto_m2m_intermediate_id = author_book_auto_m2m_intermediate.pk

        cls.holder = Holder2.objects.create(dummy=13)
        cls.inner2 = Inner2.objects.create(dummy=42, holder=cls.holder)

    def setUp(self):
        self.holder_change_url = reverse('admin:admin_inlines_holder2_change', args=(self.holder.id,))
        self.client.force_login(self.user)

    def test_inline_add_m2m_noperm(self):
        response = self.client.get(reverse('admin:admin_inlines_author_add'))
        # No change permission on books, so no inline
        self.assertNotContains(response, '<h2>Author-book relationships</h2>')
        self.assertNotContains(response, 'Add another Author-Book Relationship')
        self.assertNotContains(response, 'id="id_Author_books-TOTAL_FORMS"')

    def test_inline_add_fk_noperm(self):
        response = self.client.get(reverse('admin:admin_inlines_holder2_add'))
        # No permissions on Inner2s, so no inline
        self.assertNotContains(response, '<h2>Inner2s</h2>')
        self.assertNotContains(response, 'Add another Inner2')
        self.assertNotContains(response, 'id="id_inner2_set-TOTAL_FORMS"')

    def test_inline_change_m2m_noperm(self):
        response = self.client.get(self.author_change_url)
        # No change permission on books, so no inline
        self.assertNotContains(response, '<h2>Author-book relationships</h2>')
        self.assertNotContains(response, 'Add another Author-Book Relationship')
        self.assertNotContains(response, 'id="id_Author_books-TOTAL_FORMS"')

    def test_inline_change_fk_noperm(self):
        response = self.client.get(self.holder_change_url)
        # No permissions on Inner2s, so no inline
        self.assertNotContains(response, '<h2>Inner2s</h2>')
        self.assertNotContains(response, 'Add another Inner2')
        self.assertNotContains(response, 'id="id_inner2_set-TOTAL_FORMS"')

    def test_inline_add_m2m_add_perm(self):
        permission = Permission.objects.get(codename='add_book', content_type=self.book_ct)
        self.user.user_permissions.add(permission)
        response = self.client.get(reverse('admin:admin_inlines_author_add'))
        # No change permission on Books, so no inline
        self.assertNotContains(response, '<h2>Author-book relationships</h2>')
        self.assertNotContains(response, 'Add another Author-Book Relationship')
        self.assertNotContains(response, 'id="id_Author_books-TOTAL_FORMS"')

    def test_inline_add_fk_add_perm(self):
        permission = Permission.objects.get(codename='add_inner2', content_type=self.inner_ct)
        self.user.user_permissions.add(permission)
        response = self.client.get(reverse('admin:admin_inlines_holder2_add'))
        # Add permission on inner2s, so we get the inline
        self.assertContains(response, '<h2>Inner2s</h2>')
        self.assertContains(response, 'Add another Inner2')
        self.assertContains(response, '<input type="hidden" id="id_inner2_set-TOTAL_FORMS" '
                            'value="3" name="inner2_set-TOTAL_FORMS">', html=True)

    def test_inline_change_m2m_add_perm(self):
        permission = Permission.objects.get(codename='add_book', content_type=self.book_ct)
        self.user.user_permissions.add(permission)
        response = self.client.get(self.author_change_url)
        # No change permission on books, so no inline
        self.assertNotContains(response, '<h2>Author-book relationships</h2>')
        self.assertNotContains(response, 'Add another Author-Book Relationship')
        self.assertNotContains(response, 'id="id_Author_books-TOTAL_FORMS"')
        self.assertNotContains(response, 'id="id_Author_books-0-DELETE"')

    def test_inline_change_m2m_change_perm(self):
        permission = Permission.objects.get(codename='change_book', content_type=self.book_ct)
        self.user.user_permissions.add(permission)
        response = self.client.get(self.author_change_url)
        # We have change perm on books, so we can add/change/delete inlines
        self.assertContains(response, '<h2>Author-book relationships</h2>')
        self.assertContains(response, 'Add another Author-book relationship')
        self.assertContains(response, '<input type="hidden" id="id_Author_books-TOTAL_FORMS" '
                            'value="4" name="Author_books-TOTAL_FORMS">', html=True)
        self.assertContains(
            response,
            '<input type="hidden" id="id_Author_books-0-id" value="%i" '
            'name="Author_books-0-id">' % self.author_book_auto_m2m_intermediate_id,
            html=True
        )
        self.assertContains(response, 'id="id_Author_books-0-DELETE"')

    def test_inline_change_fk_add_perm(self):
        permission = Permission.objects.get(codename='add_inner2', content_type=self.inner_ct)
        self.user.user_permissions.add(permission)
        response = self.client.get(self.holder_change_url)
        # Add permission on inner2s, so we can add but not modify existing
        self.assertContains(response, '<h2>Inner2s</h2>')
        self.assertContains(response, 'Add another Inner2')
        # 3 extra forms only, not the existing instance form
        self.assertContains(
            response,
            '<input type="hidden" id="id_inner2_set-TOTAL_FORMS" value="3" '
            'name="inner2_set-TOTAL_FORMS">',
            html=True
        )
        self.assertNotContains(
            response,
            '<input type="hidden" id="id_inner2_set-0-id" value="%i" name="inner2_set-0-id">' % self.inner2.id,
            html=True
        )

    def test_inline_change_fk_change_perm(self):
        permission = Permission.objects.get(codename='change_inner2', content_type=self.inner_ct)
        self.user.user_permissions.add(permission)
        response = self.client.get(self.holder_change_url)
        # Change permission on inner2s, so we can change existing but not add new
        self.assertContains(response, '<h2>Inner2s</h2>', count=2)
        # Just the one form for existing instances
        self.assertContains(
            response, '<input type="hidden" id="id_inner2_set-TOTAL_FORMS" value="1" name="inner2_set-TOTAL_FORMS">',
            html=True
        )
        self.assertContains(
            response,
            '<input type="hidden" id="id_inner2_set-0-id" value="%i" name="inner2_set-0-id">' % self.inner2.id,
            html=True
        )
        # max-num 0 means we can't add new ones
        self.assertContains(
            response,
            '<input type="hidden" id="id_inner2_set-MAX_NUM_FORMS" value="0" name="inner2_set-MAX_NUM_FORMS">',
            html=True
        )
        # TabularInline
        self.assertContains(response, '<th class="column-dummy required">Dummy</th>', html=True)
        self.assertContains(
            response,
            '<input type="number" name="inner2_set-2-0-dummy" value="%s" '
            'class="vIntegerField" id="id_inner2_set-2-0-dummy">' % self.inner2.dummy,
            html=True,
        )

    def test_inline_change_fk_add_change_perm(self):
        permission = Permission.objects.get(codename='add_inner2', content_type=self.inner_ct)
        self.user.user_permissions.add(permission)
        permission = Permission.objects.get(codename='change_inner2', content_type=self.inner_ct)
        self.user.user_permissions.add(permission)
        response = self.client.get(self.holder_change_url)
        # Add/change perm, so we can add new and change existing
        self.assertContains(response, '<h2>Inner2s</h2>')
        # One form for existing instance and three extra for new
        self.assertContains(
            response, '<input type="hidden" id="id_inner2_set-TOTAL_FORMS" value="4" name="inner2_set-TOTAL_FORMS">',
            html=True
        )
        self.assertContains(
            response,
            '<input type="hidden" id="id_inner2_set-0-id" value="%i" name="inner2_set-0-id">' % self.inner2.id,
            html=True
        )

    def test_inline_change_fk_change_del_perm(self):
        permission = Permission.objects.get(codename='change_inner2', content_type=self.inner_ct)
        self.user.user_permissions.add(permission)
        permission = Permission.objects.get(codename='delete_inner2', content_type=self.inner_ct)
        self.user.user_permissions.add(permission)
        response = self.client.get(self.holder_change_url)
        # Change/delete perm on inner2s, so we can change/delete existing
        self.assertContains(response, '<h2>Inner2s</h2>')
        # One form for existing instance only, no new
        self.assertContains(
            response,
            '<input type="hidden" id="id_inner2_set-TOTAL_FORMS" value="1" name="inner2_set-TOTAL_FORMS">',
            html=True
        )
        self.assertContains(
            response,
            '<input type="hidden" id="id_inner2_set-0-id" value="%i" name="inner2_set-0-id">' % self.inner2.id,
            html=True
        )
        self.assertContains(response, 'id="id_inner2_set-0-DELETE"')

    def test_inline_change_fk_all_perms(self):
        permission = Permission.objects.get(codename='add_inner2', content_type=self.inner_ct)
        self.user.user_permissions.add(permission)
        permission = Permission.objects.get(codename='change_inner2', content_type=self.inner_ct)
        self.user.user_permissions.add(permission)
        permission = Permission.objects.get(codename='delete_inner2', content_type=self.inner_ct)
        self.user.user_permissions.add(permission)
        response = self.client.get(self.holder_change_url)
        # All perms on inner2s, so we can add/change/delete
        self.assertContains(response, '<h2>Inner2s</h2>', count=2)
        # One form for existing instance only, three for new
        self.assertContains(
            response,
            '<input type="hidden" id="id_inner2_set-TOTAL_FORMS" value="4" name="inner2_set-TOTAL_FORMS">',
            html=True
        )
        self.assertContains(
            response,
            '<input type="hidden" id="id_inner2_set-0-id" value="%i" name="inner2_set-0-id">' % self.inner2.id,
            html=True
        )
        self.assertContains(response, 'id="id_inner2_set-0-DELETE"')
        # TabularInline
        self.assertContains(response, '<th class="column-dummy required">Dummy</th>', html=True)
        self.assertContains(
            response,
            '<input type="number" name="inner2_set-2-0-dummy" value="%s" '
            'class="vIntegerField" id="id_inner2_set-2-0-dummy">' % self.inner2.dummy,
            html=True,
        )


@override_settings(ROOT_URLCONF='admin_inlines.urls')
class SeleniumTests(AdminSeleniumTestCase):

    available_apps = ['admin_inlines'] + AdminSeleniumTestCase.available_apps

    def setUp(self):
        User.objects.create_superuser(username='super', password='secret', email='super@example.com')

    def test_add_stackeds(self):
        """
        The "Add another XXX" link correctly adds items to the stacked formset.
        """
        self.admin_login(username='super', password='secret')
        self.selenium.get(self.live_server_url + reverse('admin:admin_inlines_holder4_add'))

        inline_id = '#inner4stacked_set-group'

        def rows_length():
            return len(self.selenium.find_elements_by_css_selector('%s .dynamic-inner4stacked_set' % inline_id))
        self.assertEqual(rows_length(), 3)

        add_button = self.selenium.find_element_by_link_text(
            'Add another Inner4 stacked')
        add_button.click()

        self.assertEqual(rows_length(), 4)

    def test_delete_stackeds(self):
        self.admin_login(username='super', password='secret')
        self.selenium.get(self.live_server_url + reverse('admin:admin_inlines_holder4_add'))

        inline_id = '#inner4stacked_set-group'

        def rows_length():
            return len(self.selenium.find_elements_by_css_selector('%s .dynamic-inner4stacked_set' % inline_id))
        self.assertEqual(rows_length(), 3)

        add_button = self.selenium.find_element_by_link_text(
            'Add another Inner4 stacked')
        add_button.click()
        add_button.click()

        self.assertEqual(rows_length(), 5, msg="sanity check")
        for delete_link in self.selenium.find_elements_by_css_selector('%s .inline-deletelink' % inline_id):
            delete_link.click()
        self.assertEqual(rows_length(), 3)

    def test_add_inlines(self):
        """
        The "Add another XXX" link correctly adds items to the inline form.
        """
        self.admin_login(username='super', password='secret')
        self.selenium.get(self.live_server_url + reverse('admin:admin_inlines_profilecollection_add'))

        # There's only one inline to start with and it has the correct ID.
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            '.dynamic-profile_set')), 1)
        self.assertEqual(self.selenium.find_elements_by_css_selector(
            '.dynamic-profile_set')[0].get_attribute('id'),
            'profile_set-0')
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            '.dynamic-profile_set#profile_set-0 input[name=profile_set-0-first_name]')), 1)
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            '.dynamic-profile_set#profile_set-0 input[name=profile_set-0-last_name]')), 1)

        # Add an inline
        self.selenium.find_element_by_link_text('Add another Profile').click()

        # The inline has been added, it has the right id, and it contains the
        # correct fields.
        self.assertEqual(len(self.selenium.find_elements_by_css_selector('.dynamic-profile_set')), 2)
        self.assertEqual(self.selenium.find_elements_by_css_selector(
            '.dynamic-profile_set')[1].get_attribute('id'), 'profile_set-1')
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            '.dynamic-profile_set#profile_set-1 input[name=profile_set-1-first_name]')), 1)
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            '.dynamic-profile_set#profile_set-1 input[name=profile_set-1-last_name]')), 1)

        # Let's add another one to be sure
        self.selenium.find_element_by_link_text('Add another Profile').click()
        self.assertEqual(len(self.selenium.find_elements_by_css_selector('.dynamic-profile_set')), 3)
        self.assertEqual(self.selenium.find_elements_by_css_selector(
            '.dynamic-profile_set')[2].get_attribute('id'), 'profile_set-2')
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            '.dynamic-profile_set#profile_set-2 input[name=profile_set-2-first_name]')), 1)
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            '.dynamic-profile_set#profile_set-2 input[name=profile_set-2-last_name]')), 1)

        # Enter some data and click 'Save'
        self.selenium.find_element_by_name('profile_set-0-first_name').send_keys('0 first name 1')
        self.selenium.find_element_by_name('profile_set-0-last_name').send_keys('0 last name 2')
        self.selenium.find_element_by_name('profile_set-1-first_name').send_keys('1 first name 1')
        self.selenium.find_element_by_name('profile_set-1-last_name').send_keys('1 last name 2')
        self.selenium.find_element_by_name('profile_set-2-first_name').send_keys('2 first name 1')
        self.selenium.find_element_by_name('profile_set-2-last_name').send_keys('2 last name 2')

        self.selenium.find_element_by_xpath('//input[@value="Save"]').click()
        self.wait_page_loaded()

        # The objects have been created in the database
        self.assertEqual(ProfileCollection.objects.all().count(), 1)
        self.assertEqual(Profile.objects.all().count(), 3)

    def test_delete_inlines(self):
        self.admin_login(username='super', password='secret')
        self.selenium.get(self.live_server_url + reverse('admin:admin_inlines_profilecollection_add'))

        # Add a few inlines
        self.selenium.find_element_by_link_text('Add another Profile').click()
        self.selenium.find_element_by_link_text('Add another Profile').click()
        self.selenium.find_element_by_link_text('Add another Profile').click()
        self.selenium.find_element_by_link_text('Add another Profile').click()
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            '#profile_set-group table tr.dynamic-profile_set')), 5)
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            'form#profilecollection_form tr.dynamic-profile_set#profile_set-0')), 1)
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            'form#profilecollection_form tr.dynamic-profile_set#profile_set-1')), 1)
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            'form#profilecollection_form tr.dynamic-profile_set#profile_set-2')), 1)
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            'form#profilecollection_form tr.dynamic-profile_set#profile_set-3')), 1)
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            'form#profilecollection_form tr.dynamic-profile_set#profile_set-4')), 1)

        # Click on a few delete buttons
        self.selenium.find_element_by_css_selector(
            'form#profilecollection_form tr.dynamic-profile_set#profile_set-1 td.delete a').click()
        self.selenium.find_element_by_css_selector(
            'form#profilecollection_form tr.dynamic-profile_set#profile_set-2 td.delete a').click()
        # The rows are gone and the IDs have been re-sequenced
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            '#profile_set-group table tr.dynamic-profile_set')), 3)
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            'form#profilecollection_form tr.dynamic-profile_set#profile_set-0')), 1)
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            'form#profilecollection_form tr.dynamic-profile_set#profile_set-1')), 1)
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            'form#profilecollection_form tr.dynamic-profile_set#profile_set-2')), 1)

    def test_alternating_rows(self):
        self.admin_login(username='super', password='secret')
        self.selenium.get(self.live_server_url + reverse('admin:admin_inlines_profilecollection_add'))

        # Add a few inlines
        self.selenium.find_element_by_link_text('Add another Profile').click()
        self.selenium.find_element_by_link_text('Add another Profile').click()

        row_selector = 'form#profilecollection_form tr.dynamic-profile_set'
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            "%s.row1" % row_selector)), 2, msg="Expect two row1 styled rows")
        self.assertEqual(len(self.selenium.find_elements_by_css_selector(
            "%s.row2" % row_selector)), 1, msg="Expect one row2 styled row")

    def test_collapsed_inlines(self):
        # Collapsed inlines have SHOW/HIDE links.
        self.admin_login(username='super', password='secret')
        self.selenium.get(self.live_server_url + reverse('admin:admin_inlines_author_add'))
        # One field is in a stacked inline, other in a tabular one.
        test_fields = ['#id_nonautopkbook_set-0-title', '#id_nonautopkbook_set-2-0-title']
        show_links = self.selenium.find_elements_by_link_text('SHOW')
        self.assertEqual(len(show_links), 3)
        for show_index, field_name in enumerate(test_fields, 0):
            self.wait_until_invisible(field_name)
            show_links[show_index].click()
            self.wait_until_visible(field_name)
        hide_links = self.selenium.find_elements_by_link_text('HIDE')
        self.assertEqual(len(hide_links), 2)
        for hide_index, field_name in enumerate(test_fields, 0):
            self.wait_until_visible(field_name)
            hide_links[hide_index].click()
            self.wait_until_invisible(field_name)