thepraandClaude Opus 5.5
5a13597c00
An ObjectId carries its creation second and a per-process counter, so two avatars made one after the other by the same login got ids a few counts apart: a link between personas that every Mastodon client would have seen. Avatar and Group now generate ids from the UTC day plus eight random bytes (still valid ObjectIds), and a remote post's id is made from its published time with a random tail, so posts page in the order they were written rather than the order they arrived. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB
41 lines
1.3 KiB
C#
41 lines
1.3 KiB
C#
using MongoDB.Bson;
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using PrivaPub.Infrastructure.Ids;
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using PrivaPub.Models.User;
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using GroupEntity = PrivaPub.Models.Group.Group;
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namespace PrivaPub.Tests.Infrastructure
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{
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public class PrivacyIdsTests
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{
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[Fact]
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public void Persona_ids_carry_only_the_day_and_share_nothing_else()
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{
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var first = (string)new Avatar().GenerateNewID();
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var second = (string)new Avatar().GenerateNewID();
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Assert.True(ObjectId.TryParse(first, out var a));
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Assert.True(ObjectId.TryParse(second, out var b));
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Assert.Equal(DateTime.UtcNow.Date, a.CreationTime);
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Assert.Equal(a.CreationTime, b.CreationTime);
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Assert.NotEqual(first[8..14], second[8..14]);
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Assert.Equal(DateTime.UtcNow.Date, ObjectId.Parse((string)new GroupEntity().GenerateNewID()).CreationTime);
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}
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[Fact]
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public void A_remote_post_id_sorts_by_its_published_time()
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{
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var older = PrivacyIds.At(new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
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var newer = PrivacyIds.At(new DateTime(2025, 1, 2, 0, 0, 0, DateTimeKind.Utc));
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Assert.True(string.CompareOrdinal(older, newer) < 0);
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Assert.Equal(new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc), ObjectId.Parse(older).CreationTime);
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}
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[Fact]
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public void A_published_time_in_the_future_is_clamped() =>
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Assert.True(ObjectId.Parse(PrivacyIds.At(DateTime.UtcNow.AddYears(50))).CreationTime < DateTime.UtcNow.AddDays(2));
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}
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}
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