Post to mastodon from the profile page for logged in users

backend/tests/test_api.py

@@ -403,6 +403,7 @@ def test_public_and_admin_pages_render_html():
     feed_script = client.get('/static/feed.js?v=7').text
     assert 'if (item.is_owner && !showIdentity)' in feed_script
     assert 'deleteEntry(item, deleteButton)' in feed_script
+    assert 'postToMastodon(item, mastodonButton)' in feed_script
     assert 'tag.toLowerCase() === pref.tag.toLowerCase()' in feed_script
     assert 'return `${date.getFullYear()} ${months[date.getMonth()]} ${date.getDate()} - ${hours}:${minutes}`' in feed_script
     assert 'edit-tag-options' in feed_script
@@ -452,6 +453,8 @@ def test_link_submission_posts_to_enabled_mastodon_plugin():
         assert received['authorization'] == 'Bearer test-token'
         assert received['content_type'] == 'application/x-www-form-urlencoded'
         assert received['body'] == {'status': ['From my #LinkLog: A useful page\n\nWorth sharing\n\nfrom: https://example.com/useful\n\n#python #web']}
+        posted_item = next(item for item in client.get('/api/public/feed/alice', headers=headers).json() if item['id'] == response.json()['id'])
+        assert posted_item['mastodon_posted'] is True
     finally:
         server.shutdown()
         thread.join()