Agent-System-Backend/internal/docgen/renderer_integration_test.go

package docgen

import (
	"archive/zip"
	"bytes"
	"context"
	"encoding/json"
	"encoding/xml"
	"errors"
	"io"
	"os/exec"
	"path/filepath"
	"reflect"
	"strings"
	"sync/atomic"
	"testing"
	"time"

	markdownrenderer "agent-document-renderer/markdown"
	"agent-document-renderer/model"
	"agent-document-renderer/profile"
	"agent-document-renderer/profiles"
	"agent-document-renderer/render"
)

const representativeMarkdown = `# 研发周会纪要

这是普通工作区交付物的正文。

## 要点

- 统一解析入口
- 保留 Markdown

| 项目 | 状态 |
|---|---|
| 解析器 | 统一 |

![公司默认样图](asset:company.default.sample-image@1.0.0)

:::callout warning
公司默认规则只用于普通工作区交付。
:::

:::page-break

分页后的结论。
`

func workspaceRequest(markdown []byte) Request {
	return Request{
		DocumentID:   "workspace-minutes",
		Title:        "研发周会纪要",
		DocumentType: "general",
		Language:     "zh-CN",
		Markdown:     markdown,
		Mode:         render.ModePreview,
		FrozenAt:     time.Date(2026, 10, 15, 12, 0, 0, 0, time.UTC),
		RequestedBy:  "alice",
	}
}

func TestGenerateProducesDeterministicHashedDeliveryPackage(t *testing.T) {
	request := workspaceRequest([]byte(representativeMarkdown))
	first, err := Generate(context.Background(), request)
	if err != nil {
		t.Fatalf("first Generate: %v", err)
	}
	second, err := Generate(context.Background(), request)
	if err != nil {
		t.Fatalf("second Generate: %v", err)
	}
	for _, pair := range []struct {
		name string
		a    Artifact
		b    Artifact
	}{
		{"Markdown", first.Markdown, second.Markdown},
		{"DOCX", first.DOCX, second.DOCX},
		{"manifest", first.Manifest, second.Manifest},
		{"archive", first.Archive, second.Archive},
	} {
		if pair.a.SHA256 == "" || pair.a.SHA256 != pair.b.SHA256 || !bytes.Equal(pair.a.Bytes, pair.b.Bytes) {
			t.Errorf("%s is not byte deterministic: first=%s second=%s", pair.name, pair.a.SHA256, pair.b.SHA256)
		}
	}

	var manifest Manifest
	if err := json.Unmarshal(first.Manifest.Bytes, &manifest); err != nil {
		t.Fatalf("decode manifest: %v", err)
	}
	bundle, err := profiles.LoadCompanyDefault()
	if err != nil {
		t.Fatalf("load renderer company default: %v", err)
	}
	if manifest.SchemaVersion != ManifestSchemaVersion || manifest.RendererIdentity != RendererIdentity ||
		manifest.SelectionSource != "organization-default" || manifest.Profile.Candidate ||
		manifest.Profile.ReviewStatus != bundle.Review.Status || manifest.Profile.PublicationAllowed != bundle.Review.PublicationAllowed {
		t.Fatalf("manifest profile provenance = %#v, renderer review = %#v", manifest, bundle.Review)
	}
	if manifest.Profile.ReviewStatus != "approved" || !manifest.Profile.PublicationAllowed {
		t.Fatalf("published organization default reported review=%q publicationAllowed=%v", manifest.Profile.ReviewStatus, manifest.Profile.PublicationAllowed)
	}
	if manifest.Profile.ProfileSHA256 == "" || manifest.Profile.AssetManifestSHA256 == "" || manifest.Profile.ReviewSHA256 == "" {
		t.Fatalf("manifest omitted source hashes: %#v", manifest.Profile)
	}
	listed := map[string]string{}
	for _, item := range manifest.Artifacts {
		listed[item.Name] = item.SHA256
	}
	if listed[first.Markdown.Name] != first.Markdown.SHA256 || listed[first.DOCX.Name] != first.DOCX.SHA256 {
		t.Fatalf("manifest artifact hashes = %#v, want Markdown=%s DOCX=%s", listed, first.Markdown.SHA256, first.DOCX.SHA256)
	}
	if manifest.Renderer.ArtifactHash != first.DOCX.SHA256 || manifest.Renderer.FrozenAt != request.FrozenAt || manifest.Renderer.RequestedBy != request.RequestedBy {
		t.Fatalf("renderer receipt does not match frozen request: %#v", manifest.Renderer)
	}

	zr, err := zip.NewReader(bytes.NewReader(first.Archive.Bytes), int64(len(first.Archive.Bytes)))
	if err != nil {
		t.Fatalf("open delivery archive: %v", err)
	}
	archiveFiles := map[string][]byte{}
	for _, file := range zr.File {
		stream, err := file.Open()
		if err != nil {
			t.Fatal(err)
		}
		raw, err := io.ReadAll(stream)
		stream.Close()
		if err != nil {
			t.Fatal(err)
		}
		archiveFiles[file.Name] = raw
	}
	for _, item := range []Artifact{first.Markdown, first.DOCX, first.Manifest} {
		if !bytes.Equal(archiveFiles[item.Name], item.Bytes) {
			t.Errorf("archive %s bytes do not match delivered artifact", item.Name)
		}
	}
}

func TestGeneratePersistsCanonicalMarkdownWithStableNodeParity(t *testing.T) {
	delivery, err := Generate(context.Background(), workspaceRequest([]byte(representativeMarkdown)))
	if err != nil {
		t.Fatalf("Generate: %v", err)
	}

	reparsed, err := markdownrenderer.Parse(delivery.Markdown.Bytes, markdownrenderer.Options{
		FirstImport: false,
		MaxBytes:    2 << 20,
		MaxNodes:    10_000,
		MaxDepth:    64,
	})
	if err != nil {
		t.Fatalf("persisted Markdown is not independently parseable: %v", err)
	}
	if !reflect.DeepEqual(reparsed.Document, delivery.Document) {
		t.Fatalf("canonical nodes changed across the persisted Markdown entry\nfirst:  %#v\nsecond: %#v", delivery.Document, reparsed.Document)
	}
	if reparsed.Metadata.DocumentID != "workspace-minutes" || reparsed.Metadata.ProjectID != WorkspaceProjectID ||
		reparsed.Metadata.DocumentType != "general" || reparsed.Metadata.Title != "研发周会纪要" ||
		reparsed.Metadata.Language != "zh-CN" || reparsed.Metadata.ProfileID != "company.default" ||
		reparsed.Metadata.ProfileVersion != "1.0.0" || reparsed.Metadata.Controlled {
		t.Fatalf("controlled metadata changed: %#v", reparsed.Metadata)
	}

	wantKinds := map[model.NodeKind]int{
		model.NodeHeading:   2,
		model.NodeParagraph: 2,
		model.NodeList:      1,
		model.NodeTable:     1,
		model.NodeImage:     1,
		model.NodeCallout:   1,
		model.NodePageBreak: 1,
	}
	gotKinds := map[model.NodeKind]int{}
	seenIDs := map[string]bool{}
	var visit func(model.Node)
	visit = func(node model.Node) {
		if node.ID == "" || seenIDs[node.ID] {
			t.Fatalf("node ID is missing or unstable: %q", node.ID)
		}
		seenIDs[node.ID] = true
		gotKinds[node.Kind]++
		for _, child := range node.Children {
			visit(child)
		}
	}
	visit(delivery.Document.Root)
	for kind, want := range wantKinds {
		if got := gotKinds[kind]; got != want {
			t.Errorf("%s nodes = %d, want %d", kind, got, want)
		}
	}
	if !strings.Contains(string(delivery.Markdown.Bytes), "<!-- node-id:") {
		t.Fatal("persisted Markdown omitted stable node markers")
	}
}

func TestGeneratePreservesCompleteLegacyMarkdownContract(t *testing.T) {
	request := workspaceRequest([]byte(sampleMinutes))
	delivery, err := Generate(context.Background(), request)
	if err != nil {
		t.Fatal(err)
	}
	replayed, err := markdownrenderer.Parse(delivery.Markdown.Bytes, markdownrenderer.Options{
		MaxBytes: 2 << 20, MaxNodes: 10_000, MaxDepth: 64,
	})
	if err != nil || !reflect.DeepEqual(delivery.Document, replayed.Document) {
		t.Fatalf("complete legacy fixture did not replay canonically: err=%v", err)
	}

	wantKinds := []model.NodeKind{
		model.NodeHeading, model.NodeHeading, model.NodeParagraph,
		model.NodeHeading, model.NodeList, model.NodeQuote,
		model.NodeCodeBlock, model.NodeCodeBlock, model.NodeHeading,
		model.NodeList, model.NodeThematicBreak, model.NodeTable,
	}
	gotKinds := make([]model.NodeKind, len(delivery.Document.Root.Children))
	for index := range delivery.Document.Root.Children {
		gotKinds[index] = delivery.Document.Root.Children[index].Kind
	}
	if !reflect.DeepEqual(gotKinds, wantKinds) {
		t.Fatalf("canonical block kinds = %#v, want %#v", gotKinds, wantKinds)
	}

	var quote *model.Node
	var codes []*model.Node
	var hasStrong, hasEmphasis, hasStrike, hasInlineCode, hasLink bool
	var walkInline func([]model.Inline)
	walkInline = func(inlines []model.Inline) {
		for index := range inlines {
			switch inlines[index].Kind {
			case model.InlineStrong:
				hasStrong = true
			case model.InlineEmphasis:
				hasEmphasis = true
			case model.InlineStrike:
				hasStrike = true
			case model.InlineCode:
				hasInlineCode = true
			case model.InlineLink:
				hasLink = true
			}
			walkInline(inlines[index].Children)
		}
	}
	var walk func(*model.Node)
	walk = func(node *model.Node) {
		if node.Kind == model.NodeQuote {
			quote = node
		}
		if node.Kind == model.NodeCodeBlock {
			codes = append(codes, node)
		}
		walkInline(node.Inlines)
		for index := range node.Children {
			walk(&node.Children[index])
		}
	}
	walk(&delivery.Document.Root)
	if quote == nil || len(codes) != 2 || !hasStrong || !hasEmphasis || !hasStrike || !hasInlineCode || !hasLink {
		t.Fatalf("semantic canonical document incomplete: quote=%v codes=%d strong=%v emphasis=%v strike=%v inlineCode=%v link=%v", quote != nil, len(codes), hasStrong, hasEmphasis, hasStrike, hasInlineCode, hasLink)
	}
	if codes[0].Text != "fmt.Println(\"backtick\")\n" || codes[1].Text != "fmt.Println(\"tilde\")\n" {
		t.Fatalf("fenced code text = %q / %q", codes[0].Text, codes[1].Text)
	}

	unordered := delivery.Document.Root.Children[4]
	orderedChild := unordered.Children[1].Children[0]
	deepBullet := orderedChild.Children[0].Children[0]
	if nodePropertyValue(unordered, "ordered") != "false" ||
		nodePropertyValue(orderedChild, "ordered") != "true" ||
		nodePropertyValue(deepBullet, "ordered") != "false" {
		t.Fatalf("nested list semantics = %#v / %#v / %#v", unordered.Properties, orderedChild.Properties, deepBullet.Properties)
	}
	if nodePropertyValue(unordered.Children[2], "checked") != "true" || nodePropertyValue(unordered.Children[3], "checked") != "false" {
		t.Fatalf("task states = %#v / %#v", unordered.Children[2].Properties, unordered.Children[3].Properties)
	}
	ordered := delivery.Document.Root.Children[9]
	if nodePropertyValue(ordered, "ordered") != "true" || nodePropertyValue(ordered, "start") != "3" {
		t.Fatalf("ordered-list start = %#v, want 3", ordered.Properties)
	}
	table := delivery.Document.Root.Children[11]
	wantAlignments := []string{"left", "center", "right", ""}
	for rowIndex, row := range table.Children {
		for cellIndex, cell := range row.Children {
			if got := nodePropertyValue(cell, "alignment"); got != wantAlignments[cellIndex] {
				t.Fatalf("row %d cell %d alignment = %q, want %q", rowIndex, cellIndex, got, wantAlignments[cellIndex])
			}
		}
	}

	documentXML := docxPart(t, delivery.DOCX.Bytes, "word/document.xml")
	for _, fragment := range []string{
		`<w:b/>`, `<w:i/>`, `<w:strike/>`, `w:val="inlineCode"`, `w:val="link"`,
		`w:val="quote"`, `w:val="code"`, `<w:numPr>`, `<w:tbl>`,
		`<w:t xml:space="preserve">☑ </w:t>`, `<w:t xml:space="preserve">☐ </w:t>`,
		`<w:pBdr><w:bottom w:val="single"`, `<w:jc w:val="left"/>`,
		`<w:jc w:val="center"/>`, `<w:jc w:val="right"/>`,
	} {
		if !strings.Contains(documentXML, fragment) {
			t.Errorf("Word output missing %s", fragment)
		}
	}
	numberingXML := docxPart(t, delivery.DOCX.Bytes, "word/numbering.xml")
	for _, fragment := range []string{
		`<w:ilvl w:val="0"/>`, `<w:ilvl w:val="1"/>`, `<w:ilvl w:val="2"/>`,
		`<w:lvlOverride w:ilvl="0"><w:startOverride w:val="3"/></w:lvlOverride>`,
	} {
		if !strings.Contains(documentXML+numberingXML, fragment) {
			t.Errorf("Word numbering missing %s", fragment)
		}
	}
	if bytes.Contains(delivery.DOCX.Bytes, []byte("https://example.com/private-target")) || strings.Contains(documentXML, "TargetMode=\"External\"") {
		t.Fatal("safe link target leaked into DOCX package")
	}
	legacy, err := legacyBuild(request.Title, sampleMinutes)
	if err != nil {
		t.Fatal(err)
	}
	receipt := compareLegacyAndShared(request.Title, []byte(sampleMinutes), delivery.Document, legacy, delivery.DOCX.Bytes)
	for _, name := range []string{"list-structure", "task-state", "thematic-break", "table-alignment"} {
		if dimension := comparisonDimension(t, receipt, name); dimension.Status != "match" {
			t.Errorf("complete fixture comparison dimension %s = %#v, want match", name, dimension)
		}
	}
}

func TestMaterializedMarkdownMustFitAndReplayAtOneBudget(t *testing.T) {
	request := workspaceRequest([]byte("# T\n\nsmall body\n"))
	request.Title = "T"
	request.Limits.MaxMarkdownBytes = 256
	if delivery, err := Generate(context.Background(), request); !errors.Is(err, ErrResourceLimit) {
		t.Fatalf("materialized overflow returned delivery=%d bytes err=%v, want ErrResourceLimit", len(delivery.Markdown.Bytes), err)
	}

	request.Limits.MaxMarkdownBytes = 0
	first, err := Generate(context.Background(), request)
	if err != nil {
		t.Fatal(err)
	}
	request.Markdown = first.Markdown.Bytes
	request.Limits.MaxMarkdownBytes = len(first.Markdown.Bytes)
	second, err := Generate(context.Background(), request)
	if err != nil || !bytes.Equal(first.Markdown.Bytes, second.Markdown.Bytes) {
		t.Fatalf("exact-budget replay failed: err=%v first=%d second=%d", err, len(first.Markdown.Bytes), len(second.Markdown.Bytes))
	}
}

func TestPersistedControlledMetadataRoutesBeforeDefaultProfileLoad(t *testing.T) {
	source := []byte("---\ndocumentId: controlled\nprojectId: workspace\ndocumentType: general\ntitle: Controlled\nlanguage: zh-CN\nprofileId: company.default\nprofileVersion: 1.0.0\ncontrolled: true\n---\n\n<!-- node-id:heading -->\n# Controlled\n")
	request := workspaceRequest(source)
	request.DocumentID = "controlled"
	request.Title = "Controlled"
	loads := 0
	deps := defaultGeneratorDependencies()
	baseLoad := deps.loadDefault
	deps.loadDefault = func(ctx context.Context) (profiles.Bundle, error) {
		loads++
		return baseLoad(ctx)
	}
	_, err := generate(context.Background(), request, deps)
	if !errors.Is(err, ErrRDMRequired) || loads != 0 {
		t.Fatalf("persisted controlled route err=%v profileLoads=%d, want ErrRDMRequired before load", err, loads)
	}
}

func TestRendererIdentityMatchesPublishedPin(t *testing.T) {
	const want = "agent-document-renderer@31fbe54fae8bf11be664919ce173da0d68ebfdc9"
	if RendererIdentity != want {
		t.Fatalf("RendererIdentity = %q, want %q", RendererIdentity, want)
	}
}

func TestRendererIdentityIsGeneratedFromCheckedOutComponent(t *testing.T) {
	repository, err := filepath.Abs(filepath.Join("..", ".."))
	if err != nil {
		t.Fatal(err)
	}
	command := exec.Command("go", "run", "./internal/docgen/internal/genrendereridentity", "-check")
	command.Dir = repository
	if output, err := command.CombinedOutput(); err != nil {
		t.Fatalf("renderer identity generation check: %v\n%s", err, output)
	}
}

func TestGenerateReusesPersistedMarkdownWithoutChangingNodeIdentity(t *testing.T) {
	request := workspaceRequest([]byte(representativeMarkdown))
	first, err := Generate(context.Background(), request)
	if err != nil {
		t.Fatal(err)
	}
	request.Markdown = first.Markdown.Bytes
	second, err := Generate(context.Background(), request)
	if err != nil {
		t.Fatalf("Generate persisted Markdown: %v", err)
	}
	if !reflect.DeepEqual(first.Document, second.Document) {
		t.Fatalf("canonical node identities changed\nfirst: %#v\nsecond: %#v", first.Document, second.Document)
	}
	if !bytes.Equal(first.Markdown.Bytes, second.Markdown.Bytes) || !bytes.Equal(first.DOCX.Bytes, second.DOCX.Bytes) {
		t.Fatal("identical persisted Markdown and frozen inputs changed delivery bytes")
	}
}

func TestGenerateRejectsUnknownPersistedMetadata(t *testing.T) {
	request := workspaceRequest([]byte(representativeMarkdown))
	first, err := Generate(context.Background(), request)
	if err != nil {
		t.Fatal(err)
	}
	request.Markdown = bytes.Replace(first.Markdown.Bytes, []byte("controlled: false\n"), []byte("controlled: false\nscript: build.sh\n"), 1)
	_, err = Generate(context.Background(), request)
	var diagnostic *DiagnosticError
	if !errors.As(err, &diagnostic) || diagnostic.Stage != "parse" || diagnostic.Code != "unknown_metadata" {
		t.Fatalf("unknown metadata error = %#v (%v)", diagnostic, err)
	}
}

func TestGenerateRejectsControlledAndProjectRoutesBeforeDefaultFallback(t *testing.T) {
	for _, mutate := range []func(*Request){
		func(request *Request) { request.Controlled = true },
		func(request *Request) { request.ProjectDocument = true },
	} {
		request := workspaceRequest([]byte(representativeMarkdown))
		mutate(&request)
		if _, err := Generate(context.Background(), request); !errors.Is(err, ErrRDMRequired) {
			t.Fatalf("Generate route error = %v, want ErrRDMRequired", err)
		}
	}
}

func TestGenerateRoutesReviewAndApprovalModesToRDM(t *testing.T) {
	for _, mode := range []render.Mode{render.ModeReview, render.ModeApproved} {
		request := workspaceRequest([]byte(representativeMarkdown))
		request.Mode = mode
		if _, err := Generate(context.Background(), request); !errors.Is(err, ErrRDMRequired) {
			t.Errorf("mode %s error = %v, want ErrRDMRequired", mode, err)
		}
	}
}

func TestGenerateRejectsProfileAndAssetMismatch(t *testing.T) {
	request := workspaceRequest([]byte(representativeMarkdown))
	request.ProfileID = "company.other"
	request.ProfileVersion = "9.9.9"
	if _, err := Generate(context.Background(), request); !errors.Is(err, ErrProfileMismatch) {
		t.Fatalf("profile mismatch error = %v, want ErrProfileMismatch", err)
	}

	request = workspaceRequest([]byte(strings.ReplaceAll(representativeMarkdown,
		"asset:company.default.sample-image@1.0.0", "asset:undeclared.image@1.0.0")))
	if _, err := Generate(context.Background(), request); err == nil || !strings.Contains(err.Error(), "undeclared asset") {
		t.Fatalf("asset mismatch error = %v, want an honest undeclared-asset diagnostic", err)
	}
}

func TestGenerateEnforcesLimitsAndCancellation(t *testing.T) {
	request := workspaceRequest([]byte(representativeMarkdown))
	request.Limits.MaxMarkdownBytes = 32
	if _, err := Generate(context.Background(), request); !errors.Is(err, ErrResourceLimit) {
		t.Fatalf("limit error = %v, want ErrResourceLimit", err)
	}

	canceled, cancel := context.WithCancel(context.Background())
	cancel()
	if _, err := Generate(canceled, workspaceRequest([]byte(representativeMarkdown))); !errors.Is(err, context.Canceled) {
		t.Fatalf("cancellation error = %v, want context.Canceled", err)
	}
}

func TestGenerateReturnsTypedDiagnosticsForUnsafeMarkdownAndAssets(t *testing.T) {
	tests := []struct {
		name     string
		markdown string
		stage    string
		code     string
	}{
		{"script", "# Report\n\n<script>alert(1)</script>\n", "parse", "unsafe_markdown"},
		{"external asset", "# Report\n\n![remote](https://example.com/a.png)\n", "parse", "unsafe_markdown"},
		{"unknown directive", "# Report\n\n:::execute script=build.sh\n", "parse", "unknown_directive"},
		{"undeclared asset", "# Report\n\n![missing](asset:missing@1.0.0)\n", "render", "asset_mismatch"},
	}
	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			delivery, err := Generate(context.Background(), workspaceRequest([]byte(test.markdown)))
			if err == nil {
				t.Fatal("Generate succeeded for unsafe input")
			}
			var diagnostic *DiagnosticError
			if !errors.As(err, &diagnostic) {
				t.Fatalf("error %T %v is not a DiagnosticError", err, err)
			}
			if diagnostic.Stage != test.stage || diagnostic.Code != test.code || strings.TrimSpace(diagnostic.Error()) == "" {
				t.Fatalf("diagnostic = %#v, want stage=%s code=%s", diagnostic, test.stage, test.code)
			}
			if len(delivery.Markdown.Bytes)+len(delivery.DOCX.Bytes)+len(delivery.Manifest.Bytes)+len(delivery.Archive.Bytes) != 0 {
				t.Fatal("failed render returned partial delivery bytes")
			}
		})
	}
}

type failingRenderer struct{ err error }

func (renderer failingRenderer) Validate(context.Context, render.Request) ([]render.Diagnostic, error) {
	return []render.Diagnostic{{Code: "forced_failure", Severity: render.SeverityError, Message: renderer.err.Error()}}, renderer.err
}

func (renderer failingRenderer) Render(context.Context, render.Request) (render.Result, error) {
	return render.Result{Diagnostics: []render.Diagnostic{{Code: "forced_failure", Severity: render.SeverityError, Message: renderer.err.Error()}}}, renderer.err
}

type cleanupRenderer struct {
	active   *atomic.Int32
	started  chan struct{}
	canceled chan struct{}
	release  chan struct{}
}

func (renderer cleanupRenderer) Validate(context.Context, render.Request) ([]render.Diagnostic, error) {
	return nil, nil
}

func (renderer cleanupRenderer) Render(ctx context.Context, _ render.Request) (render.Result, error) {
	renderer.active.Add(1)
	defer renderer.active.Add(-1)
	close(renderer.started)
	<-ctx.Done()
	close(renderer.canceled)
	<-renderer.release
	return render.Result{}, ctx.Err()
}

func TestCancellationWaitsForRendererUnwindAndRecoversCapacity(t *testing.T) {
	var active atomic.Int32
	started := make(chan struct{})
	canceled := make(chan struct{})
	release := make(chan struct{})
	deps := defaultGeneratorDependencies()
	deps.newRenderer = func(*profile.AssetReader) render.Renderer {
		return cleanupRenderer{active: &active, started: started, canceled: canceled, release: release}
	}
	ctx, cancel := context.WithCancel(context.Background())
	result := make(chan error, 1)
	go func() {
		_, err := generate(ctx, workspaceRequest([]byte(representativeMarkdown)), deps)
		result <- err
	}()
	<-started
	cancel()
	<-canceled
	select {
	case err := <-result:
		t.Fatalf("Generate returned before renderer cleanup: %v", err)
	default:
	}
	close(release)
	select {
	case err := <-result:
		if !errors.Is(err, context.Canceled) || active.Load() != 0 {
			t.Fatalf("cancellation err=%v active=%d, want canceled and zero capacity", err, active.Load())
		}
	case <-time.After(time.Second):
		t.Fatal("Generate did not return after renderer cleanup")
	}
}

func TestRendererFailureNeverFallsBackToLegacy(t *testing.T) {
	forced := errors.New("forced renderer failure")
	legacyCalls := 0
	deps := defaultGeneratorDependencies()
	deps.newRenderer = func(*profile.AssetReader) render.Renderer { return failingRenderer{err: forced} }
	deps.legacyBuild = func(string, string) ([]byte, error) {
		legacyCalls++
		return []byte("legacy"), nil
	}
	request := workspaceRequest([]byte(representativeMarkdown))
	if _, err := generateWithOptions(context.Background(), request, RenderOptions{MigrationComparison: true}, deps); !errors.Is(err, forced) {
		t.Fatalf("generate error = %v, want forced renderer failure", err)
	}
	if legacyCalls != 0 {
		t.Fatalf("legacy renderer called %d times after shared renderer failure", legacyCalls)
	}
}

func TestLegacyComparisonIsExplicitAndDoesNotReplaceSharedOutput(t *testing.T) {
	legacyCalls := 0
	deps := defaultGeneratorDependencies()
	deps.legacyBuild = func(string, string) ([]byte, error) {
		legacyCalls++
		return []byte("legacy-comparison-only"), nil
	}
	request := workspaceRequest([]byte(representativeMarkdown))
	withoutFlag, err := generate(context.Background(), request, deps)
	if err != nil {
		t.Fatal(err)
	}
	if legacyCalls != 0 || withoutFlag.Comparison.Enabled {
		t.Fatalf("disabled comparison called legacy renderer: calls=%d receipt=%#v", legacyCalls, withoutFlag.Comparison)
	}

	withFlag, err := generateWithOptions(context.Background(), request, RenderOptions{MigrationComparison: true}, deps)
	if err != nil {
		t.Fatal(err)
	}
	if legacyCalls != 1 || !withFlag.Comparison.Enabled || withFlag.Comparison.LegacySHA256 == "" || withFlag.Comparison.Assessment != "unassessed" || len(withFlag.Comparison.Unassessed) == 0 {
		t.Fatalf("enabled comparison receipt=%#v calls=%d", withFlag.Comparison, legacyCalls)
	}
	if !bytes.Equal(withoutFlag.DOCX.Bytes, withFlag.DOCX.Bytes) {
		t.Fatal("legacy comparison replaced the shared-renderer production output")
	}
}

func TestRepresentativeLegacyComparisonRecordsOnlyIntentionalDifferences(t *testing.T) {
	const common = "# 研发周会纪要\n\n正文有 **粗体**、*斜体*、~~删除~~、`代码` 和 [链接](https://example.com/private)。\n\n> 引用内容。\n\n```go\nfmt.Println(1)\n```\n\n## 要点\n\n- [x] 已完成\n- [ ] 待办\n\n1. 第一项\n2. 第二项\n\n---\n\n| 左 | 中 | 右 |\n| :--- | :---: | ---: |\n| L | C | R |\n"
	request := workspaceRequest([]byte(common))
	delivery, err := generateWithOptions(context.Background(), request, RenderOptions{MigrationComparison: true}, defaultGeneratorDependencies())
	if err != nil {
		t.Fatal(err)
	}
	if delivery.Comparison.Assessment != "assessed" || len(delivery.Comparison.AccidentalDifferences) != 0 || len(delivery.Comparison.Unassessed) != 0 {
		t.Fatalf("accidental differences remain: %#v", delivery.Comparison.AccidentalDifferences)
	}
	exceptions := map[string]bool{}
	for _, dimension := range delivery.Comparison.Dimensions {
		if dimension.Status == "intentional" {
			exceptions[dimension.ExceptionID] = true
		}
	}
	for _, id := range []string{"RDR-T10-CMP-001", "RDR-T10-CMP-002", "RDR-T10-CMP-003", "RDR-T10-CMP-004"} {
		if !exceptions[id] {
			t.Errorf("comparison omitted reviewed exception %s: %#v", id, delivery.Comparison.Dimensions)
		}
	}
	for _, name := range []string{
		"list-structure", "task-state", "thematic-break", "table-alignment",
		"word-numbering", "word-task-state", "word-thematic-rule", "word-table-alignment",
	} {
		dimension := comparisonDimension(t, delivery.Comparison, name)
		if dimension.Status != "match" {
			t.Errorf("comparison dimension %s = %#v, want match", name, dimension)
		}
	}
	for _, dimension := range delivery.Comparison.Dimensions {
		if dimension.ExceptionID == comparisonExceptionCorporate && !strings.Contains(dimension.Detail, "published organization default") {
			t.Errorf("corporate layout exception %s detail = %q, want published organization default", dimension.Name, dimension.Detail)
		}
	}
}

func TestComparisonDetectsCanonicalAndDOCXTableAlignmentLoss(t *testing.T) {
	const aligned = "# Alignment\n\n| Left | Center | Right | Default |\n| :--- | :---: | ---: | --- |\n| L | C | R | D |\n"
	request := workspaceRequest([]byte(aligned))
	request.Title = "Alignment"
	delivery, err := Generate(context.Background(), request)
	if err != nil {
		t.Fatal(err)
	}
	legacy, err := legacyBuild(request.Title, aligned)
	if err != nil {
		t.Fatal(err)
	}

	canonicalWithoutAlignment := delivery.Document.Clone()
	for rowIndex := range canonicalWithoutAlignment.Root.Children[1].Children {
		for cellIndex := range canonicalWithoutAlignment.Root.Children[1].Children[rowIndex].Children {
			canonicalWithoutAlignment.Root.Children[1].Children[rowIndex].Children[cellIndex].Properties = nil
		}
	}
	canonicalLoss := compareLegacyAndShared(request.Title, []byte(aligned), canonicalWithoutAlignment, legacy, delivery.DOCX.Bytes)
	if dimension := comparisonDimension(t, canonicalLoss, "table-alignment"); dimension.Status != "accidental" {
		t.Fatalf("canonical table-alignment loss = %#v, want accidental", dimension)
	}

	docxWithoutAlignment := rewriteDOCXPart(t, delivery.DOCX.Bytes, "word/document.xml", func(content []byte) []byte {
		for _, value := range []string{"left", "center", "right"} {
			content = bytes.ReplaceAll(content, []byte(`<w:jc w:val="`+value+`"/>`), nil)
		}
		return content
	})
	docxLoss := compareLegacyAndShared(request.Title, []byte(aligned), delivery.Document, legacy, docxWithoutAlignment)
	if docxLoss.Assessment != "differences" {
		t.Fatalf("DOCX alignment loss assessment = %q, want differences", docxLoss.Assessment)
	}
	if dimension := comparisonDimension(t, docxLoss, "word-table-alignment"); dimension.Status != "accidental" {
		t.Fatalf("DOCX table-alignment loss = %#v, want accidental", dimension)
	}
}

func TestLegacyComparisonReportsAccidentalAndUnassessedDimensions(t *testing.T) {
	request := workspaceRequest([]byte("# Expected\n\nExpected body.\n"))
	deps := defaultGeneratorDependencies()
	deps.legacyBuild = func(title, _ string) ([]byte, error) { return legacyBuild(title, "# Wrong\n\nLost body.\n") }
	accidental, err := generateWithOptions(context.Background(), request, RenderOptions{MigrationComparison: true}, deps)
	if err != nil {
		t.Fatal(err)
	}
	if accidental.Comparison.Assessment != "differences" || len(accidental.Comparison.AccidentalDifferences) == 0 {
		t.Fatalf("content loss was not accidental: %#v", accidental.Comparison)
	}

	deps.legacyBuild = func(string, string) ([]byte, error) { return []byte("not a DOCX"), nil }
	unassessed, err := generateWithOptions(context.Background(), request, RenderOptions{MigrationComparison: true}, deps)
	if err != nil {
		t.Fatal(err)
	}
	if unassessed.Comparison.Assessment != "unassessed" || len(unassessed.Comparison.Unassessed) == 0 {
		t.Fatalf("invalid legacy sample was reported as assessed: %#v", unassessed.Comparison)
	}
}

func docxVisibleText(t *testing.T, raw []byte) string {
	t.Helper()
	zr, err := zip.NewReader(bytes.NewReader(raw), int64(len(raw)))
	if err != nil {
		t.Fatal(err)
	}
	for _, file := range zr.File {
		if file.Name != "word/document.xml" {
			continue
		}
		stream, err := file.Open()
		if err != nil {
			t.Fatal(err)
		}
		decoder := xml.NewDecoder(stream)
		var text strings.Builder
		for {
			token, err := decoder.Token()
			if err == io.EOF {
				break
			}
			if err != nil {
				stream.Close()
				t.Fatal(err)
			}
			if chars, ok := token.(xml.CharData); ok {
				text.Write(chars)
				text.WriteByte('\n')
			}
		}
		stream.Close()
		return text.String()
	}
	t.Fatal("word/document.xml missing")
	return ""
}

func docxPart(t *testing.T, raw []byte, name string) string {
	t.Helper()
	zr, err := zip.NewReader(bytes.NewReader(raw), int64(len(raw)))
	if err != nil {
		t.Fatal(err)
	}
	for _, file := range zr.File {
		if file.Name != name {
			continue
		}
		stream, err := file.Open()
		if err != nil {
			t.Fatal(err)
		}
		content, err := io.ReadAll(stream)
		stream.Close()
		if err != nil {
			t.Fatal(err)
		}
		return string(content)
	}
	t.Fatalf("DOCX part %s missing", name)
	return ""
}

func comparisonDimension(t *testing.T, receipt ComparisonReceipt, name string) ComparisonDimension {
	t.Helper()
	for _, dimension := range receipt.Dimensions {
		if dimension.Name == name {
			return dimension
		}
	}
	t.Fatalf("comparison dimension %s missing: %#v", name, receipt.Dimensions)
	return ComparisonDimension{}
}

func rewriteDOCXPart(t *testing.T, raw []byte, name string, rewrite func([]byte) []byte) []byte {
	t.Helper()
	reader, err := zip.NewReader(bytes.NewReader(raw), int64(len(raw)))
	if err != nil {
		t.Fatal(err)
	}
	var output bytes.Buffer
	writer := zip.NewWriter(&output)
	for _, file := range reader.File {
		stream, err := file.Open()
		if err != nil {
			t.Fatal(err)
		}
		content, err := io.ReadAll(stream)
		stream.Close()
		if err != nil {
			t.Fatal(err)
		}
		if file.Name == name {
			content = rewrite(content)
		}
		target, err := writer.Create(file.Name)
		if err != nil {
			t.Fatal(err)
		}
		if _, err := target.Write(content); err != nil {
			t.Fatal(err)
		}
	}
	if err := writer.Close(); err != nil {
		t.Fatal(err)
	}
	return output.Bytes()
}