P5: remote objects are read in every shape, and videos, events, audio and links keep their own details
- ObjectShapes reads `url`, `icon` and `image` as a value, a Link or an array; Markdown `content` (PeerTube) is rendered; a missing `mediaType` is inferred from the extension or the attachment type (Bridgy); alt text comes from `name`, `summary` or their language maps; thumbnails come from attachment `icon`, object `icon[]`, `image` or a Loops `preview`; durations are ISO 8601 or seconds; per-attachment `sensitive` is kept; the language falls back to `@context` `@language` (Pleroma); titles and excerpts are plain text; hashtags normalise with NFKC like Mastodon. - Typed details on Post: Link (Lemmy link posts, Mbin `source` URLs, Mastodon 4.7 Link attachments with an FEP-8967 publisher preview), Video (PeerTube files with their streams, HLS playlist, poster, captions, chapters, licence, channel, live state, comment policy), Audio (Funkwhale), Event (Mobilizon, Gancio, Hubzilla: times, zone, floating time, places and addresses, online link, capacity, status), the cover image, and the author's own source text. - Mastodon API: a card built from those details without fetching anything, an event's "when · where" line, attachment thumbnails and durations, and no media file offered as a preview image. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB
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using PrivaPub.Api.Mastodon.Mappers;
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using PrivaPub.Federation.Objects;
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using PrivaPub.Models.Post;
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using System.Text.Json.Nodes;
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namespace PrivaPub.Tests.Federation
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{
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public class ObjectShapesTests
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{
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static NoteDocument Parse(string json) => NoteParser.Parse(JsonNode.Parse(json));
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[Fact]
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public void Keeps_a_peertube_video_with_its_files_poster_captions_and_markdown_description()
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{
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var note = Parse("""
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{
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"id": "https://tube.example/videos/watch/1", "type": "Video", "name": "A *talk*", "duration": "PT6299S",
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"mediaType": "text/markdown", "content": "**Bold** words", "sensitive": false, "views": 14771, "state": 1,
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"isLiveBroadcast": false, "commentsPolicy": 2, "downloadEnabled": true,
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"licence": { "identifier": "5", "name": "Attribution - Share Alike" }, "category": { "identifier": "2", "name": "Films" },
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"attributedTo": [{ "type": "Person", "id": "https://tube.example/accounts/ann" }, { "type": "Group", "id": "https://tube.example/video-channels/films" }],
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"icon": [
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{ "type": "Image", "url": "https://tube.example/thumb-280.jpg", "mediaType": "image/jpeg", "width": 280, "height": 157 },
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{ "type": "Image", "url": "https://tube.example/thumb-1920.jpg", "mediaType": "image/jpeg", "width": 1920, "height": 1080 },
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{ "type": "Image", "url": "https://tube.example/thumb-850.jpg", "mediaType": "image/jpeg", "width": 850, "height": 480 }
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],
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"subtitleLanguage": [{ "identifier": "en", "url": [{ "mediaType": "text/vtt", "href": "https://tube.example/en.vtt" }] }],
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"url": [
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{ "type": "Link", "mediaType": "text/html", "href": "https://tube.example/w/abc" },
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{ "type": "Link", "mediaType": "video/mp4", "href": "https://tube.example/720.mp4", "height": 720, "width": 1280, "fps": 24, "size": 942586378,
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"attachment": [{ "type": "PropertyValue", "name": "ffprobe_codec_type", "value": "audio" }, { "type": "PropertyValue", "name": "ffprobe_codec_type", "value": "video" }] },
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{ "type": "Link", "mediaType": "application/x-mpegURL", "href": "https://tube.example/master.m3u8" },
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{ "type": "Link", "mediaType": "application/x-bittorrent;x-scheme-handler/magnet", "href": "magnet:?xt=urn:btih:abc" }
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]
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}
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""");
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Assert.Equal("https://tube.example/w/abc", note.Url);
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Assert.Equal("A *talk*", note.Title);
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Assert.Contains("<strong>Bold</strong>", note.ContentHtml);
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Assert.Equal("https://tube.example/thumb-850.jpg", note.CoverURL);
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Assert.Equal(6299, note.Video.DurationSeconds);
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var file = Assert.Single(note.Video.Variants);
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Assert.Equal(new[] { "audio", "video" }, file.Streams);
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Assert.Equal(942586378, file.Size);
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Assert.Equal("https://tube.example/master.m3u8", note.Video.PlaylistURL);
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Assert.Equal(2, note.Video.CommentsPolicy);
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Assert.Equal("Attribution - Share Alike", note.Video.Licence);
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Assert.Equal("https://tube.example/video-channels/films", note.Video.ChannelURI);
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Assert.Equal("https://tube.example/en.vtt", Assert.Single(note.Video.Captions).Url);
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Assert.Equal("https://tube.example/accounts/ann", note.AttributedTo);
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}
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[Fact]
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public void Keeps_a_mobilizon_event_with_its_time_place_and_online_link()
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{
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var note = Parse("""
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{
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"id": "https://events.example/events/9", "type": "Event", "name": "Repair café",
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"summary": "<p>Saturday at the library</p>", "content": "<p>Bring broken things.</p>",
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"startTime": "2026-10-03T10:00:00+02:00", "endTime": "2026-10-03T13:00:00+02:00", "timezone": "Europe/Rome",
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"joinMode": "free", "participantCount": 12, "maximumAttendeeCapacity": 40, "ical:status": "CONFIRMED",
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"location": { "type": "Place", "name": "Biblioteca", "latitude": 45.07, "longitude": 7.68,
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"address": { "type": "PostalAddress", "streetAddress": "Via Roma 1", "addressLocality": "Torino", "addressCountry": "IT" } },
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"attachment": [{ "type": "Link", "name": "Website", "href": "https://meet.example/repair" }],
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"attributedTo": "https://events.example/@club"
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}
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""");
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Assert.Null(note.SpoilerText);
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Assert.False(note.Sensitive);
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Assert.Equal("Saturday at the library", note.Excerpt);
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Assert.Equal(new DateTime(2026, 10, 3, 8, 0, 0, DateTimeKind.Utc), note.Event.Start);
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Assert.Equal("Via Roma 1, Torino, IT", Assert.Single(note.Event.Places).Address);
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Assert.Equal("https://meet.example/repair", note.Event.OnlineURL);
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Assert.Equal(40, note.Event.Capacity);
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Assert.Equal("CONFIRMED", note.Event.Status);
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Assert.Equal("2026-10-03 10:00 – 13:00 (Europe/Rome) · Biblioteca", MastodonMapper.EventLine(note.Event));
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}
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[Fact]
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public void Keeps_a_lemmy_link_post_as_a_link_with_its_thumbnail()
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{
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var note = Parse("""
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{
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"id": "https://lemmy.example/post/5", "type": "Page", "name": "A good read", "attributedTo": "https://lemmy.example/u/bo",
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"attachment": [{ "type": "Link", "href": "https://news.example/story", "mediaType": "text/html" }],
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"image": { "type": "Image", "url": "https://lemmy.example/pictrs/thumb.jpg" },
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"language": { "identifier": "en", "name": "English" }
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}
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""");
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Assert.Equal("https://news.example/story", note.Link.Href);
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Assert.Equal("https://lemmy.example/pictrs/thumb.jpg", note.Link.ImageURL);
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Assert.False(note.Link.FromPublisher);
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Assert.Empty(note.Attachments);
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}
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[Fact]
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public void Takes_a_publisher_supplied_preview_from_a_link_attachment()
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{
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var note = Parse("""
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{
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"id": "https://m.example/statuses/1", "type": "Note", "attributedTo": "https://m.example/users/a", "content": "<p>look</p>",
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"attachment": [{ "type": "Link", "href": "https://news.example/a",
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"preview": { "type": "Article", "name": "Headline & more", "summary": "<p>What happened</p>", "image": { "type": "Image", "url": "https://news.example/a.jpg" } } }]
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}
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""");
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Assert.Equal("Headline & more", note.Link.Title);
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Assert.Equal("What happened", note.Link.Description);
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Assert.Equal("https://news.example/a.jpg", note.Link.ImageURL);
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Assert.True(note.Link.FromPublisher);
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}
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[Fact]
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public void Reads_media_in_every_shape_and_infers_what_is_missing()
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{
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var note = Parse("""
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{
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"id": "https://bsky.brid.gy/convert/ap/at://did:plc:x/post/1", "type": "Note", "attributedTo": "https://bsky.brid.gy/ap/did:plc:x",
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"content": "<p>pics</p>",
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"@context": ["https://www.w3.org/ns/activitystreams", { "@language": "de" }],
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"attachment": [
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{ "type": "Image", "url": "https://cdn.example/a.jpeg", "summary": "alt from summary" },
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{ "type": "Document", "url": [{ "type": "Link", "href": "https://cdn.example/clip", "mediaType": "video/mp4" }],
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"icon": { "type": "Image", "url": "https://cdn.example/clip.jpg" }, "duration": "PT12.4S", "sensitive": true },
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{ "type": "Image", "url": "https://cdn.example/nameless" }
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]
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}
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""");
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Assert.Equal("de", note.Language);
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Assert.Equal("image/jpeg", note.Attachments[0].ContentType);
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Assert.Equal("alt from summary", note.Attachments[0].Description);
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Assert.Equal("https://cdn.example/clip", note.Attachments[1].RemoteURL);
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Assert.Equal("video/mp4", note.Attachments[1].ContentType);
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Assert.Equal("https://cdn.example/clip.jpg", note.Attachments[1].RemotePreviewURL);
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Assert.Equal(12.4, note.Attachments[1].DurationSeconds);
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Assert.True(note.Attachments[1].Sensitive);
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Assert.Equal("image/*", note.Attachments[2].ContentType);
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}
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[Fact]
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public void Keeps_a_funkwhale_track_and_a_loops_poster()
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{
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var track = Parse("""
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{
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"id": "https://music.example/federation/music/uploads/1", "type": "Audio", "name": "Song", "attributedTo": "https://music.example/@band",
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"summary": "#rock #live", "duration": 241, "position": 3, "album": "https://music.example/albums/2", "license": "https://creativecommons.org/licenses/by/4.0/",
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"url": [{ "type": "Link", "mediaType": "text/html", "href": "https://music.example/library/tracks/1" },
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{ "type": "Link", "mediaType": "audio/mpeg", "href": "https://music.example/listen/1.mp3", "bitrate": 320000, "size": 9640000 }]
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}
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""");
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var loop = Parse("""
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{
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"id": "https://loops.example/v/1", "type": "Note", "attributedTo": "https://loops.example/@dancer", "content": "",
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"preview": { "type": "Image", "url": { "href": "https://loops.example/poster.jpg", "mediaType": "image/jpeg" } },
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"attachment": [{ "type": "Document", "mediaType": "video/mp4", "url": "https://loops.example/v/1.mp4", "width": 720, "height": 1280 }]
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}
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""");
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Assert.Equal("#rock #live", track.Excerpt);
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Assert.Null(track.SpoilerText);
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Assert.Equal(241, track.Audio.DurationSeconds);
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Assert.Equal(3, track.Audio.Position);
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Assert.Equal("https://music.example/listen/1.mp3", Assert.Single(track.Audio.Variants).Url);
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Assert.Equal("https://loops.example/poster.jpg", loop.CoverURL);
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}
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[Fact]
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public void Normalises_hashtags_like_mastodon() =>
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Assert.Equal("ｆｅｄｉ".Normalize(System.Text.NormalizationForm.FormKC).ToLowerInvariant(), Assert.Single(Parse("""
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{ "id": "https://x.example/1", "type": "Note", "attributedTo": "https://x.example/u", "content": "",
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"tag": [{ "type": "Hashtag", "name": "#ＦＥＤＩ" }] }
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""").Tags));
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}
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}
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