Wagtail Unit Test - Template tag

test_template_tags.py

def test_subnav_use_root_menu(self):
    # Arrange
    api_reference = Page.objects.get(url_path='/docs/api/')
    lookups = Page.objects.get(url_path='/docs/api/lookups/')
    mock_context = {'request': 'Request data'}
    parent = lookups.get_site().root_page
    menuitems = parent.get_children().live().in_menu()

    # Act
    nav_data = subnav(mock_context, lookups)

    # Assert
    self.assertEqual(nav_data['calling_page'], lookups)
    self.assertEqual(len(nav_data['menuitems']), len(menuitems))
    self.assertEqual(nav_data['section_index'], api_reference.specific)
    self.assertEqual(nav_data['request'], 'Request data')

wagtail_fixture.json

{
    "model": "wagtailcore.site",
    "fields": {
        "hostname": "localhost",
        "port": 80,
        "site_name": "My Wagtail Site",
        "root_page": 3,
        "is_default_site": true
    }
},
{
    "model": "wagtailcore.page",
    "pk": 1,
    "fields": {
        "path": "0001",
        "depth": 1,
        "numchild": 1,
        "title": "Root",
        "slug": "root",
        "content_type": [
            "wagtailcore",
            "page"
        ],
        "live": true,
        "has_unpublished_changes": false,
        "url_path": "/",
        "owner": null,
        "seo_title": "",
        "show_in_menus": false,
        "search_description": "",
        "go_live_at": null,
        "expire_at": null,
        "expired": false,
        "locked": false,
        "first_published_at": null,
        "latest_revision_created_at": null
    }
},
{
    "model": "wagtailcore.page",
    "pk": 3,
    "fields": {
        "path": "00010002",
        "depth": 2,
        "numchild": 1,
        "title": "My Blog",
        "slug": "blog",
        "content_type": [
            "blog",
            "blogpage"
        ],
        "live": true,
        "has_unpublished_changes": false,
        "url_path": "/blog/",
        "owner": [
            "admin"
        ],
        "seo_title": "",
        "show_in_menus": true,
        "search_description": "",
        "go_live_at": null,
        "expire_at": null,
        "expired": false,
        "locked": false,
        "first_published_at": "2016-01-28T00:05:51.221Z",
        "latest_revision_created_at": "2016-01-28T00:05:51.145Z"
    }
},