4028205ff1
A rewrite replaces a file only when the runtime's own reader opens it. C# drops ReadStoreHeader (a second, header-only verdict that let a flush replace files the reader refuses) and asks DeserializeSnapshot from open, flush and commit; the reader now requires exactly one array, so C# refuses bytes after the store on read as TS and Python do. A zero-byte file is an empty store for all three paths. CultMesh.WriteSingleFileDocument reads the file it replaces through the Mesh reader before writing. Rust reads and rewrites through one classification (trailing bytes refused on read; a non-store first slot must be a legacy envelope array the reader accepts). TypeScript checks a legacy array with pullAll's own decoder before replacing it. Python already conformed. Shared byte vectors and per-runtime verdicts live in tests/vectors/document-variants-c2a/readability; every runtime's test reads them. Holds gains second-dictionary-value and second-list-item cases. The persistence format contract now marks v3 by content and states the readability rule. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
75 lines
2.8 KiB
C#
75 lines
2.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using FluentAssertions;
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using GameCult.Caching;
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using GameCult.Caching.MessagePack;
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using NUnit.Framework;
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#nullable enable
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namespace GameCult.Mesh.Tests;
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// A single-file write replaces a file exactly when the runtime's own reader opens it, as a cache's flush does. The bytes and
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// the verdict are shared with every runtime: tests/vectors/document-variants-c2a/readability.
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public sealed class CultMeshSingleFileReadabilityTests
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{
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private const int CSharp = 1;
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private string _root = null!;
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[SetUp]
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public void SetUp()
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{
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_root = Path.Combine(Path.GetTempPath(), "cultmesh-single-file-readability", Guid.NewGuid().ToString("N"));
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Directory.CreateDirectory(_root);
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}
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[TearDown]
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public void TearDown()
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{
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if (Directory.Exists(_root)) Directory.Delete(_root, true);
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}
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private static string VectorRoot()
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{
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for (var dir = new DirectoryInfo(TestContext.CurrentContext.TestDirectory); dir != null; dir = dir.Parent)
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{
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var candidate = Path.Combine(dir.FullName, "tests", "vectors", "document-variants-c2a", "readability");
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if (Directory.Exists(candidate)) return candidate;
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}
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throw new DirectoryNotFoundException($"Shared readability vectors not found above {TestContext.CurrentContext.TestDirectory}.");
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}
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public static IEnumerable<TestCaseData> Vectors() =>
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File.ReadAllLines(Path.Combine(VectorRoot(), "manifest.txt"))
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.Where(line => line.Length > 0 && line[0] != '#')
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.Select(line => line.Split((char[]?)null, StringSplitOptions.RemoveEmptyEntries))
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.Select(cells => new TestCaseData(cells[0], cells[CSharp] == "reads").SetName($"{cells[0]} {cells[CSharp]}"));
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private static CultMeshBodyPublicationDocument Publication() => new()
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{
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BodyId = "aetheria:entities",
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ProducerId = "aetheria",
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SchemaId = "eve.entity_soa.v1"
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};
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[TestCaseSource(nameof(Vectors))]
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public void ATypedWriteReplacesAFileExactlyWhenItReads(string vector, bool reads)
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{
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var path = Path.Combine(_root, "doc.cc");
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var bytes = File.ReadAllBytes(Path.Combine(VectorRoot(), vector));
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File.WriteAllBytes(path, bytes);
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if (reads)
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{
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CultMesh.WriteSingleFileDocument(path, new CultRecordKey("publication"), Publication());
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CultDocumentMessagePackSerialization.DeserializeSnapshot(File.ReadAllBytes(path)).Records.Should().ContainSingle();
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return;
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}
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Assert.That(() => CultMesh.WriteSingleFileDocument(path, new CultRecordKey("publication"), Publication()), Throws.Exception);
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File.ReadAllBytes(path).Should().Equal(bytes, "a file this runtime cannot read was rewritten");
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}
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}
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