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Add Disassembler Availability report to diff output (#44)
* feat: add Disassembler Availability report to header At startup, probe all candidate IL disassemblers (dotnet-ildasm, ilspycmd) for availability and version, then display the results as a table in the Markdown, HTML, and audit log report headers. This makes it explicit which tools were available/unavailable during a run, improving the explainability of IL comparison confidence levels. - Add DisassemblerProbeResult record model - Add DisassemblerHelper.ProbeAllCandidates() probing logic - Add FileDiffResultLists.DisassemblerAvailability property - Add availability table to Markdown report header (HeaderSectionWriter) - Add availability table to HTML report header (AppendHeaderSection) - Add disassemblerAvailability array to audit log JSON - Add AuditLogDisassemblerAvailability model - Add 9 new tests across 4 test classes - Update doc/samples (diff_report.md, diff_report.html, audit_log.json) - Update DEVELOPER_GUIDE.md, TESTING_GUIDE.md (EN/JP bilingual) - Update CHANGELOG.md (EN/JP), README.md (EN/JP) https://claude.ai/code/session_01RN1uYPHDtxJL13wpqCeVwt * fix: resolve build errors in DisassemblerHelper.ProbeCandidate - CS1739: Remove named parameter syntax from WaitForExit (positional only) - CA1031: Replace bare catch with specific InvalidOperationException catch https://claude.ai/code/session_01RN1uYPHDtxJL13wpqCeVwt * style: add header background color to Disassembler Availability table Apply TH_BG_DEFAULT (#fafafa) to <th> elements in the Disassembler Availability table, matching the Ignored Files table header style. https://claude.ai/code/session_01RN1uYPHDtxJL13wpqCeVwt * docs: update sample HTML with Disassembler Availability header color Apply background:#fafafa to <th> elements in the sample report to match the code change. https://claude.ai/code/session_01RN1uYPHDtxJL13wpqCeVwt * style: center-align Available column body in Disassembler Availability table Add text-align:center to the Available <td> cells in the HTML report and update the sample HTML accordingly. The MD report already uses :---------: for center alignment. https://claude.ai/code/session_01RN1uYPHDtxJL13wpqCeVwt --------- Co-authored-by: Claude <noreply@anthropic.com>
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‎CHANGELOG.md‎

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@@ -9,6 +9,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
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### [Unreleased]
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#### Added
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- **Disassembler Availability report in header** — The report header now includes a "Disassembler Availability" table that lists every candidate IL disassembler tool (e.g. `dotnet-ildasm`, `ilspycmd`) and whether it was available or unavailable in the current environment, along with its version when available. This makes it easy to understand at a glance which tools influenced the comparison and the confidence level of IL-based results. At startup, `DisassemblerHelper.ProbeAllCandidates()` probes each candidate by running `--version` and stores the results in `FileDiffResultLists.DisassemblerAvailability` (new property). The table is rendered in Markdown (`diff_report.md`), HTML (`diff_report.html`), and as a `disassemblerAvailability` JSON array in the audit log (`audit_log.json`). New model: [`DisassemblerProbeResult`](Models/DisassemblerProbeResult.cs) (`ToolName`, `Available`, `Version`, `Path`). New audit model: [`AuditLogDisassemblerAvailability`](Models/AuditLogEntry.cs). Updated [`doc/samples/diff_report.md`](doc/samples/diff_report.md), [`doc/samples/diff_report.html`](doc/samples/diff_report.html), and [`doc/samples/audit_log.json`](doc/samples/audit_log.json). Added tests `GenerateDiffReport_HeaderShowsDisassemblerAvailabilityTable`, `GenerateDiffReport_HeaderOmitsAvailabilityTable_WhenProbeResultsAreNull` in [`ReportGenerateServiceTests`](FolderDiffIL4DotNet.Tests/Services/ReportGenerateServiceTests.cs), `GenerateDiffReportHtml_HeaderShowsDisassemblerAvailabilityTable`, `GenerateDiffReportHtml_HeaderOmitsAvailabilityTable_WhenProbeResultsAreNull` in [`HtmlReportGenerateServiceTests`](FolderDiffIL4DotNet.Tests/Services/HtmlReportGenerateServiceTests.cs), `GenerateAuditLog_IncludesDisassemblerAvailability_WhenProbed`, `GenerateAuditLog_DisassemblerAvailabilityIsNull_WhenNotProbed` in [`AuditLogGenerateServiceTests`](FolderDiffIL4DotNet.Tests/Services/AuditLogGenerateServiceTests.cs), and `ProbeAllCandidates_ReturnsNonEmptyList_WithUniqueToolNames`, `ProbeAllCandidates_IncludesExpectedToolNames`, `ProbeAllCandidates_AllResultsHaveNonEmptyToolName` in [`DisassemblerHelperTests`](FolderDiffIL4DotNet.Tests/Services/DisassemblerHelperTests.cs).
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#### Changed
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- **Interleave warning messages with detail tables in Warnings section** — Each warning bullet point is now immediately followed by its corresponding detail table, instead of listing all warning messages first and then all detail tables. When both SHA256Mismatch and Timestamp Regression warnings exist, the layout is: SHA256Mismatch warning → SHA256Mismatch detail table → Timestamp Regression warning → Timestamps Regressed detail table. This change applies to both Markdown and HTML reports. In the HTML report, each warning message is rendered in its own `<ul class="warnings">` element directly above its detail table. Updated [`doc/samples/diff_report.md`](doc/samples/diff_report.md) and [`doc/samples/diff_report.html`](doc/samples/diff_report.html). Added tests `GenerateDiffReport_Sha256MismatchDetailTable_AppearsImmediatelyAfterSha256Warning` in [`ReportGenerateServiceTests`](FolderDiffIL4DotNet.Tests/Services/ReportGenerateServiceTests.cs) and `GenerateDiffReportHtml_Sha256MismatchDetailTable_AppearsImmediatelyAfterSha256Warning` in [`HtmlReportGenerateServiceTests`](FolderDiffIL4DotNet.Tests/Services/HtmlReportGenerateServiceTests.cs).
@@ -469,6 +473,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
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### [Unreleased]
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#### 追加
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- **レポートヘッダに逆アセンブラ利用可否テーブルを追加** — レポートヘッダに「Disassembler Availability」テーブルを追加しました。すべての候補 IL 逆アセンブラツール（例: `dotnet-ildasm`、`ilspycmd`）について、現在の環境で利用可能か否か、および利用可能な場合はそのバージョンを一覧表示します。これにより、どのツールが比較に影響を与えたか、IL ベースの結果の信頼度を一目で把握できます。起動時に `DisassemblerHelper.ProbeAllCandidates()` が各候補を `--version` 実行でプローブし、結果を `FileDiffResultLists.DisassemblerAvailability`（新規プロパティ）に格納します。テーブルは Markdown（`diff_report.md`）、HTML（`diff_report.html`）、および監査ログ（`audit_log.json`）の `disassemblerAvailability` JSON 配列としてレンダリングされます。新規モデル: [`DisassemblerProbeResult`](Models/DisassemblerProbeResult.cs)（`ToolName`, `Available`, `Version`, `Path`）。新規監査モデル: [`AuditLogDisassemblerAvailability`](Models/AuditLogEntry.cs)。[`doc/samples/diff_report.md`](doc/samples/diff_report.md)、[`doc/samples/diff_report.html`](doc/samples/diff_report.html)、[`doc/samples/audit_log.json`](doc/samples/audit_log.json) を更新。テスト `GenerateDiffReport_HeaderShowsDisassemblerAvailabilityTable`、`GenerateDiffReport_HeaderOmitsAvailabilityTable_WhenProbeResultsAreNull` を [`ReportGenerateServiceTests`](FolderDiffIL4DotNet.Tests/Services/ReportGenerateServiceTests.cs) に、`GenerateDiffReportHtml_HeaderShowsDisassemblerAvailabilityTable`、`GenerateDiffReportHtml_HeaderOmitsAvailabilityTable_WhenProbeResultsAreNull` を [`HtmlReportGenerateServiceTests`](FolderDiffIL4DotNet.Tests/Services/HtmlReportGenerateServiceTests.cs) に、`GenerateAuditLog_IncludesDisassemblerAvailability_WhenProbed`、`GenerateAuditLog_DisassemblerAvailabilityIsNull_WhenNotProbed` を [`AuditLogGenerateServiceTests`](FolderDiffIL4DotNet.Tests/Services/AuditLogGenerateServiceTests.cs) に、`ProbeAllCandidates_ReturnsNonEmptyList_WithUniqueToolNames`、`ProbeAllCandidates_IncludesExpectedToolNames`、`ProbeAllCandidates_AllResultsHaveNonEmptyToolName` を [`DisassemblerHelperTests`](FolderDiffIL4DotNet.Tests/Services/DisassemblerHelperTests.cs) に追加。
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#### 変更
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- **警告セクションの警告メッセージと詳細テーブルのインターリーブ配置** — 各警告メッセージの直下に対応する詳細テーブルを配置するよう変更しました。従来はすべての警告メッセージを先に一括で列挙し、その後に詳細テーブルをまとめて出力していました。SHA256Mismatch 警告とタイムスタンプ逆行警告の両方がある場合、レイアウトは: SHA256Mismatch 警告 → SHA256Mismatch 詳細テーブル → タイムスタンプ逆行警告 → Timestamps Regressed 詳細テーブルとなります。Markdown と HTML の両レポートに適用。HTML レポートでは、各警告メッセージが独立した `<ul class="warnings">` 要素として詳細テーブルの直上にレンダリングされます。[`doc/samples/diff_report.md`](doc/samples/diff_report.md) および [`doc/samples/diff_report.html`](doc/samples/diff_report.html) を更新。テスト `GenerateDiffReport_Sha256MismatchDetailTable_AppearsImmediatelyAfterSha256Warning` を [`ReportGenerateServiceTests`](FolderDiffIL4DotNet.Tests/Services/ReportGenerateServiceTests.cs) に、`GenerateDiffReportHtml_Sha256MismatchDetailTable_AppearsImmediatelyAfterSha256Warning` を [`HtmlReportGenerateServiceTests`](FolderDiffIL4DotNet.Tests/Services/HtmlReportGenerateServiceTests.cs) に追加。

‎FolderDiffIL4DotNet.Tests/Services/AuditLogGenerateServiceTests.cs‎

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@@ -437,6 +437,67 @@ public void Constructor_ThrowsOnNullLogger()
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Assert.Throws<ArgumentNullException>(() => new AuditLogGenerateService(_resultLists, null!));
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}
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// ── Disassembler Availability / 逆アセンブラ利用可否 ───────────────────
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/// <summary>
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/// Verifies that disassemblerAvailability is present in audit log when probe results exist.
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/// プローブ結果が存在する場合、監査ログに disassemblerAvailability が含まれることを確認する。
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/// </summary>
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[Fact]
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public void GenerateAuditLog_IncludesDisassemblerAvailability_WhenProbed()
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{
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var (oldDir, newDir, reportDir) = MakeDirs("disasm-avail");
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_resultLists.DisassemblerAvailability = new List<DisassemblerProbeResult>
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{
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new("dotnet-ildasm", true, "0.12.2", "/usr/local/bin/dotnet-ildasm"),
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new("ilspycmd", false, null, null),
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};
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_service.GenerateAuditLog(oldDir, newDir, reportDir,
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appVersion: "1.0.0", elapsedTimeString: "0h 0m 1.0s",
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computerName: "test-host", shouldGenerate: true);
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var json = File.ReadAllText(Path.Combine(reportDir, AuditLogGenerateService.AUDIT_LOG_FILE_NAME));
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var doc = JsonDocument.Parse(json);
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var root = doc.RootElement;
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Assert.True(root.TryGetProperty("disassemblerAvailability", out var availArr));
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Assert.Equal(JsonValueKind.Array, availArr.ValueKind);
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Assert.Equal(2, availArr.GetArrayLength());
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var first = availArr[0];
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Assert.Equal("dotnet-ildasm", first.GetProperty("toolName").GetString());
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Assert.True(first.GetProperty("available").GetBoolean());
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Assert.Equal("0.12.2", first.GetProperty("version").GetString());
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var second = availArr[1];
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Assert.Equal("ilspycmd", second.GetProperty("toolName").GetString());
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Assert.False(second.GetProperty("available").GetBoolean());
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Assert.Equal("", second.GetProperty("version").GetString());
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}
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/// <summary>
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/// Verifies that disassemblerAvailability is null in audit log when no probing was done.
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/// プローブが実行されていない場合、disassemblerAvailability が null であることを確認する。
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/// </summary>
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[Fact]
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public void GenerateAuditLog_DisassemblerAvailabilityIsNull_WhenNotProbed()
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{
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var (oldDir, newDir, reportDir) = MakeDirs("no-probe");
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_service.GenerateAuditLog(oldDir, newDir, reportDir,
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appVersion: "1.0.0", elapsedTimeString: "0h 0m 1.0s",
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computerName: "test-host", shouldGenerate: true);
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var json = File.ReadAllText(Path.Combine(reportDir, AuditLogGenerateService.AUDIT_LOG_FILE_NAME));
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var doc = JsonDocument.Parse(json);
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var root = doc.RootElement;
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Assert.True(root.TryGetProperty("disassemblerAvailability", out var availProp));
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Assert.Equal(JsonValueKind.Null, availProp.ValueKind);
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}
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// ── Helpers / ヘルパー ────────────────────────────────────────────────────
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private (string oldDir, string newDir, string reportDir) MakeDirs(string label)

‎FolderDiffIL4DotNet.Tests/Services/DisassemblerHelperTests.cs‎

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@@ -281,5 +281,52 @@ public void EnumerateExecutableNames_OnWindows_CommandWithBatSuffix_DoesNotDupli
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var names = DisassemblerHelper.EnumerateExecutableNames("mytool.bat").ToList();
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Assert.Equal(1, names.Count(n => n.EndsWith(".bat", StringComparison.OrdinalIgnoreCase)));
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}
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// ── ProbeAllCandidates / 全候補プローブ ────────────────────────────────
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/// <summary>
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/// Verifies that ProbeAllCandidates returns a non-empty list with unique tool names.
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/// ProbeAllCandidates が一意のツール名を持つ空でないリストを返すことを確認する。
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/// </summary>
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[Fact]
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public void ProbeAllCandidates_ReturnsNonEmptyList_WithUniqueToolNames()
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{
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var results = DisassemblerHelper.ProbeAllCandidates();
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Assert.NotNull(results);
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Assert.NotEmpty(results);
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var toolNames = results.Select(r => r.ToolName).ToList();
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Assert.Equal(toolNames.Count, toolNames.Distinct(StringComparer.OrdinalIgnoreCase).Count());
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}
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/// <summary>
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/// Verifies that ProbeAllCandidates includes both dotnet-ildasm and ilspycmd candidates.
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/// ProbeAllCandidates が dotnet-ildasm と ilspycmd の両方を含むことを確認する。
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/// </summary>
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[Fact]
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public void ProbeAllCandidates_IncludesExpectedToolNames()
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{
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var results = DisassemblerHelper.ProbeAllCandidates();
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var toolNames = results.Select(r => r.ToolName).ToList();
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Assert.Contains(FolderDiffIL4DotNet.Common.Constants.DOTNET_ILDASM, toolNames);
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Assert.Contains(FolderDiffIL4DotNet.Common.Constants.ILSPY_CMD, toolNames);
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}
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/// <summary>
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/// Verifies that each ProbeAllCandidates result has a non-empty ToolName.
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/// 各プローブ結果が空でない ToolName を持つことを確認する。
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/// </summary>
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[Fact]
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public void ProbeAllCandidates_AllResultsHaveNonEmptyToolName()
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{
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var results = DisassemblerHelper.ProbeAllCandidates();
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foreach (var result in results)
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{
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Assert.False(string.IsNullOrWhiteSpace(result.ToolName),
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$"ToolName should not be null or whitespace, got: '{result.ToolName}'");
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}
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}
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}
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}

‎FolderDiffIL4DotNet.Tests/Services/HtmlReportGenerateServiceTests.cs‎

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HtmlReportGenerateService.LoadEmbeddedResource("NonExistent.Resource.Name"));
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}
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[Fact]
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public void GenerateDiffReportHtml_HeaderShowsDisassemblerAvailabilityTable()
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{
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// Arrange: populate availability probe results
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// 利用可否プローブ結果を設定
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_resultLists.DisassemblerAvailability = new List<DisassemblerProbeResult>
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{
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new("dotnet-ildasm", true, "0.12.2", "/usr/local/bin/dotnet-ildasm"),
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new("ilspycmd", false, null, null),
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};
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var (oldDir, newDir, reportDir) = MakeDirs("disasm-avail");
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var config = CreateConfig();
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_service.GenerateDiffReportHtml(oldDir, newDir, reportDir,
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appVersion: "1.0", elapsedTimeString: "0h 0m 1.0s",
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computerName: "test-host", config);
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var html = File.ReadAllText(Path.Combine(reportDir, HtmlReportGenerateService.DIFF_REPORT_HTML_FILE_NAME));
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// Assert: table structure and content present in HTML
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// テーブルの構造と内容が HTML に含まれていることを検証
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Assert.Contains("Disassembler Availability", html);
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Assert.Contains("dotnet-ildasm", html);
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Assert.Contains("ilspycmd", html);
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Assert.Contains("color:#22863a", html); // green for Yes
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Assert.Contains("color:#b31d28", html); // red for No
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Assert.Contains("0.12.2", html);
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}
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[Fact]
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public void GenerateDiffReportHtml_HeaderOmitsAvailabilityTable_WhenProbeResultsAreNull()
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{
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// Arrange: no probe results (default: null)
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// プローブ結果なし（既定値: null）
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var (oldDir, newDir, reportDir) = MakeDirs("no-probe-html");
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var config = CreateConfig();
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_service.GenerateDiffReportHtml(oldDir, newDir, reportDir,
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appVersion: "1.0", elapsedTimeString: "0h 0m 1.0s",
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computerName: "test-host", config);
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var html = File.ReadAllText(Path.Combine(reportDir, HtmlReportGenerateService.DIFF_REPORT_HTML_FILE_NAME));
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// Assert: no availability table when probe results are null
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// プローブ結果が null の場合テーブルは出力されない
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Assert.DoesNotContain("Disassembler Availability", html);
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}
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private static ConfigSettings CreateConfig(bool enableInlineDiff = true, bool lazyRender = false) => new()
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{
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IgnoredExtensions = new List<string>(),

‎FolderDiffIL4DotNet.Tests/Services/ReportGenerateServiceTests.cs‎

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@@ -94,6 +94,69 @@ public void GenerateDiffReport_HeaderShowsNotUsed_WhenNoDisassemblerWasObserved(
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Assert.Contains("- IL Disassembler: N/A", reportText);
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}
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[Fact]
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public void GenerateDiffReport_HeaderShowsDisassemblerAvailabilityTable()
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{
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// Arrange: populate availability with one available and one unavailable tool
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// 1 つ利用可能、1 つ利用不可のツールで可用性を設定
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_resultLists.DisassemblerAvailability = new List<DisassemblerProbeResult>
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{
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new("dotnet-ildasm", true, "0.12.2", "/usr/local/bin/dotnet-ildasm"),
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new("ilspycmd", false, null, null),
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};
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var oldDir = Path.Combine(_rootDir, "old-avail");
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var newDir = Path.Combine(_rootDir, "new-avail");
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var reportDir = Path.Combine(_rootDir, "report-avail");
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Directory.CreateDirectory(oldDir);
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Directory.CreateDirectory(newDir);
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Directory.CreateDirectory(reportDir);
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var config = CreateConfig();
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_service.GenerateDiffReport(
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oldDir, newDir, reportDir,
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appVersion: "test",
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elapsedTimeString: "00:00:01.000",
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computerName: "test-host",
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config);
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var reportText = File.ReadAllText(Path.Combine(reportDir, "diff_report.md"));
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// Assert: availability table structure and content
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// テーブルの構造と内容を検証
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Assert.Contains("- Disassembler Availability:", reportText);
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Assert.Contains("| Tool | Available | Version |", reportText);
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Assert.Contains("| dotnet-ildasm | Yes | 0.12.2 |", reportText);
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Assert.Contains("| ilspycmd | No | N/A |", reportText);
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}
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[Fact]
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public void GenerateDiffReport_HeaderOmitsAvailabilityTable_WhenProbeResultsAreNull()
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{
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// Arrange: no probe results (default: null)
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// プローブ結果なし（既定値: null）
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var oldDir = Path.Combine(_rootDir, "old-no-probe");
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var newDir = Path.Combine(_rootDir, "new-no-probe");
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var reportDir = Path.Combine(_rootDir, "report-no-probe");
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Directory.CreateDirectory(oldDir);
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Directory.CreateDirectory(newDir);
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Directory.CreateDirectory(reportDir);
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var config = CreateConfig();
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_service.GenerateDiffReport(
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oldDir, newDir, reportDir,
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appVersion: "test",
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elapsedTimeString: "00:00:01.000",
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computerName: "test-host",
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config);
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var reportText = File.ReadAllText(Path.Combine(reportDir, "diff_report.md"));
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// Assert: no availability table when probe results are null
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// プローブ結果が null の場合、テーブルは出力されない
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Assert.DoesNotContain("Disassembler Availability", reportText);
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}
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[Fact]
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public void GenerateDiffReport_HeaderShowsMvidReasonNote()
99162
{

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