Files
bookhoard/internal/sync/cfi_converter_test.go
T
john-okeefe e40530824e
Release / build-and-push (push) Successful in 2m14s
feat(koreader): one conversion route for every feature; bookmarks get web CFIs
Progress, highlights, notes, and bookmarks entered position conversion
through three different doors: progress converted inline with an
uncached converter, annotations through the facade, bookmarks not at
all (the raw xpointer was stored verbatim, cfi_position stayed empty,
and the web drawer's goToBookmark silently no-ops on cfi-less entries).

Unify on the facade (ConvertToCanonical/ConvertFromCanonical):

- annotationEpub context resolved once per push: media item + EPUB path
  shared by every annotation instead of re-fetched per entry
- progress forward: the inline block becomes one facade call;
  non-reflowable formats pass through unchanged, and the cached
  converter stops re-parsing the book on every sync
- progress reverse: convertCFIToXPointer delegates to reverseConvertCFI,
  keeping the stored percentage in play for the fallback ladder
- bookmarks (bulk progress and /sync-bookmarks): pos0 resolves
  structural-only — bookmark text is a display label, never book text,
  so no context is supplied; webUsableCFI stores the result only for
  structural/exact epubcfi landings, discarding href/percentage results
  rather than storing dead drawer links. Also records percentage_location
  and origin_source on the legacy endpoint.
- percentages thread through: highlights/notes/bookmarks pass the device
  percentage or the derived section percentage instead of a hardcoded 0,
  so the last-resort fallback lands near the true position instead of
  the document start
- extendCFIByLength end-derivation now also fires on structural starts
  (it had silently stopped matching when the structural rung began
  landing starts with precision 'structural' rather than 'exact')

Tests: the drop-cap xpointer through the facade with empty context (the
bookmark scenario) must land structurally, not doc-start; webUsableCFI
table covers the store/discard gate.
2026-09-09 09:04:23 -04:00

690 lines
21 KiB
Go

package sync
import (
"archive/zip"
"os"
"strings"
"testing"
"golang.org/x/net/html"
)
func TestParseCREXPointer(t *testing.T) {
tests := []struct {
input string
wantFrag int
wantPath int
wantChar int
}{
{"/body/DocFragment[0]/body/div[4]/p[38]/text().541", 0, 2, 541},
{"/body/DocFragment[2]/body/div/p[5]/text()[2].16", 2, 2, 16},
{"/body/DocFragment[1]/body", 1, 0, 0},
{"/body/DocFragment[5]/body/div[3]/p[28]", 5, 2, 0},
}
for _, tt := range tests {
xp, err := ParseCREXPointer(tt.input)
if err != nil {
t.Errorf("ParseCREXPointer(%q) error: %v", tt.input, err)
continue
}
if xp.FragmentIndex != tt.wantFrag {
t.Errorf("FragmentIndex = %d, want %d", xp.FragmentIndex, tt.wantFrag)
}
if len(xp.ElementPath) != tt.wantPath {
t.Errorf("len(ElementPath) = %d, want %d (got %+v)", len(xp.ElementPath), tt.wantPath, xp.ElementPath)
}
if xp.CharOffset != tt.wantChar {
t.Errorf("CharOffset = %d, want %d", xp.CharOffset, tt.wantChar)
}
}
}
func TestParseCREXPointerInvalid(t *testing.T) {
_, err := ParseCREXPointer("epubcfi(/6/4!/4/2/1:0)")
if err == nil {
t.Error("expected error for standard epubcfi")
}
_, err = ParseCREXPointer("")
if err == nil {
t.Error("expected error for empty string")
}
}
func TestIsCREXPointer(t *testing.T) {
if !IsCREXPointer("/body/DocFragment[0]/body/div/p") {
t.Error("should recognize CRE XPointer")
}
if !IsCREXPointer("#_doc_fragment_5_ link2HCH0002") {
t.Error("should recognize CRE fragment ID")
}
if IsCREXPointer("epubcfi(/6/4!/4/2/1:0)") {
t.Error("should not recognize standard epubcfi as CRE")
}
}
func TestIsCREFragmentID(t *testing.T) {
if !IsCREFragmentID("#_doc_fragment_5_ link2HCH0002") {
t.Error("should recognize fragment ID")
}
if IsCREFragmentID("/body/DocFragment[2]/body") {
t.Error("should not recognize XPointer as fragment ID")
}
}
func TestParseCREFragmentID(t *testing.T) {
tests := []struct {
input string
wantSpine int
wantAnchor string
}{
{"#_doc_fragment_5_ link2HCH0002", 5, "link2HCH0002"},
{"#_doc_fragment_0_", 0, ""},
{"#_doc_fragment_12_someid123", 12, "someid123"},
}
for _, tt := range tests {
frag, err := ParseCREFragmentID(tt.input)
if err != nil {
t.Errorf("ParseCREFragmentID(%q) error: %v", tt.input, err)
continue
}
if frag.SpineIndex != tt.wantSpine {
t.Errorf("SpineIndex = %d, want %d", frag.SpineIndex, tt.wantSpine)
}
if frag.Anchor != tt.wantAnchor {
t.Errorf("Anchor = %q, want %q", frag.Anchor, tt.wantAnchor)
}
}
}
func TestParseCREFragmentIDInvalid(t *testing.T) {
_, err := ParseCREFragmentID("/body/DocFragment[2]/body")
if err == nil {
t.Error("expected error for XPointer input")
}
_, err = ParseCREFragmentID("#_doc_fragment_")
if err == nil {
t.Error("expected error for missing index")
}
}
func TestIsStandardEPUBCFI(t *testing.T) {
if !IsStandardEPUBCFI("epubcfi(/6/4!/4/2/1:0)") {
t.Error("should recognize standard epubcfi")
}
if IsStandardEPUBCFI("/body/DocFragment[0]/body") {
t.Error("should not recognize CRE as standard")
}
}
// writeTestEPUB builds a minimal, deterministic EPUB in a temp dir so the
// conversion tests exercise the real zip→OPF→spine→document pipeline
// without depending on books in a particular machine's uploads/ tree.
//
// Spine: doc1..doc6. doc2 carries the Dashwood sentence used for exact and
// text-search anchoring; doc6 has an id anchor for fragment-ID conversion.
func writeTestEPUB(t *testing.T) string {
t.Helper()
type spineDoc struct {
name string
body string
}
docs := []spineDoc{
{"doc1.xhtml", "<body><div><p>Chapter one opening page.</p></div></body>"},
{"doc2.xhtml", "<body><div><p>The family of Dashwood had long been settled in Sussex.</p><p>Their estate was large, and their residence was at Norland Park.</p></div></body>"},
{"doc3.xhtml", "<body><div><p>Chapter three contents.</p></div></body>"},
{"doc4.xhtml", "<body><div><p>Chapter four contents.</p></div></body>"},
{"doc5.xhtml", "<body><div><p>Chapter five contents.</p></div></body>"},
{"doc6.xhtml", "<body><div><p id=\"link2HCH0002\">He was neither fit to be a husband nor a father.</p></div></body>"},
}
containerXML := `<?xml version="1.0"?>
<container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
<rootfiles>
<rootfile full-path="OEBPS/content.opf" media-type="application/oebps-package+xml"/>
</rootfiles>
</container>`
manifest := ""
spineRefs := ""
for _, d := range docs {
id := d.name[:len(d.name)-len(".xhtml")]
manifest += " <item id=\"" + id + "\" href=\"" + d.name + "\" media-type=\"application/xhtml+xml\"/>\n"
spineRefs += " <itemref idref=\"" + id + "\"/>\n"
}
opf := `<?xml version="1.0" encoding="UTF-8"?>
<package xmlns="http://www.idpf.org/2007/opf" version="3.0" unique-identifier="uid">
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/">
<dc:identifier id="uid">test-bookhoard-fixture</dc:identifier>
<dc:title>Fixture</dc:title>
</metadata>
<manifest>
` + manifest + ` </manifest>
<spine>
` + spineRefs + ` </spine>
</package>`
path := t.TempDir() + "/fixture.epub"
f, err := os.Create(path)
if err != nil {
t.Fatal(err)
}
defer f.Close()
zw := zip.NewWriter(f)
write := func(name, content string) {
w, err := zw.Create(name)
if err != nil {
t.Fatal(err)
}
if _, err := w.Write([]byte(content)); err != nil {
t.Fatal(err)
}
}
write("META-INF/container.xml", containerXML)
write("OEBPS/content.opf", opf)
for _, d := range docs {
write("OEBPS/"+d.name, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<html xmlns=\"http://www.w3.org/1999/xhtml\">"+d.body+"</html>\n")
}
if err := zw.Close(); err != nil {
t.Fatal(err)
}
return path
}
const fixtureSentence = "The family of Dashwood had long been settled in Sussex."
func TestConvertXPointerToCFI(t *testing.T) {
c := NewCFIConverter(writeTestEPUB(t))
xp := "/body/DocFragment[2]/body/div[1]/p[1]/text().10"
result, err := c.ConvertCREToStandard(xp, 0.05, "")
if err != nil {
t.Fatalf("ConvertCREToStandard error: %v", err)
}
t.Logf("Input: %s", xp)
t.Logf("EPUBCFI: %s", result.EPUBCFI)
t.Logf("Precision: %s", result.Precision)
if result.Precision == "percentage" {
t.Error("expected better than percentage precision")
}
if result.EPUBCFI == "" {
t.Error("expected non-empty epubcfi")
}
}
func TestConvertFragmentID(t *testing.T) {
c := NewCFIConverter(writeTestEPUB(t))
frag := "#_doc_fragment_5_ link2HCH0002"
result, err := c.ConvertCREToStandard(frag, 0.9, "")
if err != nil {
t.Fatalf("ConvertCREToStandard error: %v", err)
}
t.Logf("Input: %s", frag)
t.Logf("Href: %s", result.Href)
t.Logf("Precision: %s", result.Precision)
if result.Precision != "element" {
t.Errorf("expected element precision, got %s", result.Precision)
}
if result.Href == "" {
t.Error("expected non-empty href")
}
if !strings.Contains(result.Href, "doc6.xhtml#link2HCH0002") {
t.Errorf("expected doc6.xhtml#link2HCH0002 href, got %s", result.Href)
}
}
func TestRoundTripXPointer(t *testing.T) {
c := NewCFIConverter(writeTestEPUB(t))
originalXP := "/body/DocFragment[2]/body/div[1]/p[1]/text().10"
forward, err := c.ConvertCREToStandard(originalXP, 0.05, "")
if err != nil {
t.Fatalf("forward conversion error: %v", err)
}
if forward.EPUBCFI == "" {
t.Fatal("forward conversion produced empty epubcfi")
}
t.Logf("Forward: %s → %s", originalXP, forward.EPUBCFI)
reverse, err := c.ConvertStandardToCRE(forward.EPUBCFI, forward.Percentage, "")
if err != nil {
t.Fatalf("reverse conversion error: %v", err)
}
if reverse.XPointer == "" {
t.Fatal("reverse conversion produced empty XPointer")
}
t.Logf("Reverse: %s → %s", forward.EPUBCFI, reverse.XPointer)
if reverse.Precision != "exact" {
t.Errorf("expected exact precision, got %s", reverse.Precision)
}
}
func TestRoundTripWithContextText(t *testing.T) {
c := NewCFIConverter(writeTestEPUB(t))
originalXP := "/body/DocFragment[2]/body/div[1]/p[2]/text().3"
forward, err := c.ConvertCREToStandard(originalXP, 0.06, fixtureSentence)
if err != nil {
t.Fatalf("forward conversion error: %v", err)
}
if forward.EPUBCFI == "" {
t.Fatal("forward conversion produced empty epubcfi")
}
t.Logf("Forward: %s → %s", originalXP, forward.EPUBCFI)
reverse, err := c.ConvertStandardToCRE(forward.EPUBCFI, forward.Percentage, fixtureSentence)
if err != nil {
t.Fatalf("reverse conversion error: %v", err)
}
if reverse.XPointer == "" {
t.Fatal("reverse conversion produced empty XPointer")
}
t.Logf("Reverse: %s → %s", forward.EPUBCFI, reverse.XPointer)
if reverse.Precision != "exact" {
t.Errorf("expected exact precision, got %s", reverse.Precision)
}
}
func TestReverseTextSearchFallback(t *testing.T) {
c := NewCFIConverter(writeTestEPUB(t))
// Unresolvable steps in a CFI that still parses to spine doc2
// (spine index 1): the text search must anchor on the sentence.
reverse, err := c.ConvertStandardToCRE("epubcfi(/6/4!/4/99999/1:0)", 0.05, fixtureSentence)
if err != nil {
t.Fatalf("reverse conversion error: %v", err)
}
t.Logf("Text search fallback XPointer: %s", reverse.XPointer)
t.Logf("Precision: %s", reverse.Precision)
if reverse.Precision != "exact" {
t.Errorf("expected exact precision from text search, got %s", reverse.Precision)
}
if reverse.XPointer == "" {
t.Error("expected non-empty XPointer from text search")
}
if !strings.Contains(reverse.XPointer, "DocFragment[2]") {
t.Errorf("expected fallback into DocFragment[2], got %s", reverse.XPointer)
}
}
func TestReversePercentageFallback(t *testing.T) {
c := NewCFIConverter(writeTestEPUB(t))
reverse, err := c.ConvertStandardToCRE("epubcfi(/6/4!/4/99999/1:0)", 0.5, "")
if err != nil {
t.Fatalf("reverse conversion error: %v", err)
}
t.Logf("Percentage fallback precision: %s", reverse.Precision)
if reverse.Precision != "percentage" {
t.Errorf("expected percentage precision, got %s with XPointer %s", reverse.Precision, reverse.XPointer)
}
if reverse.XPointer != "" {
t.Error("expected empty XPointer for percentage fallback")
}
}
func TestParseEPUBCFI(t *testing.T) {
tests := []struct {
input string
wantSpine int
wantSteps int
}{
{"epubcfi(/6/12!/4/2/90/1:7)", 5, 4},
{"epubcfi(/6/4!/4/2/1:0)", 1, 3},
{"epubcfi(/6/2!/4)", 0, 1},
}
for _, tt := range tests {
spineIndex, steps, err := parseEPUBCFI(tt.input)
if err != nil {
t.Errorf("parseEPUBCFI(%q) error: %v", tt.input, err)
continue
}
if spineIndex != tt.wantSpine {
t.Errorf("spineIndex = %d, want %d", spineIndex, tt.wantSpine)
}
if len(steps) != tt.wantSteps {
t.Errorf("len(steps) = %d, want %d", len(steps), tt.wantSteps)
}
}
}
func TestParseEPUBCFIRange(t *testing.T) {
spineIndex, steps, err := parseEPUBCFI("epubcfi(/6/40!/4,/24/20,/40/5:61)")
if err != nil {
t.Fatalf("parseEPUBCFI range error: %v", err)
}
if spineIndex != 19 {
t.Errorf("spineIndex = %d, want 19", spineIndex)
}
t.Logf("Range CFI steps: %d", len(steps))
for i, s := range steps {
t.Logf(" step %d: index=%d offset=%d hasOffset=%v", i, s.Index, s.Offset, s.HasOffset)
}
}
func TestParseEPUBCFIInvalid(t *testing.T) {
_, _, err := parseEPUBCFI("not-a-cfi")
if err == nil {
t.Error("expected error for invalid CFI")
}
_, _, err = parseEPUBCFI("epubcfi(/6/12)")
if err == nil {
t.Error("expected error for CFI without indirection")
}
}
func TestFindTextInNode_SingleTextNode(t *testing.T) {
doc := parseTestHTML(`<html><body><p>Hello world this is a test</p></body></html>`)
body := findBody(doc)
node, offset := findTextInNode(body, "Hello world")
if node == nil {
t.Fatal("expected to find text")
}
if offset != 0 {
t.Errorf("offset = %d, want 0", offset)
}
}
func TestFindTextInNode_CrossEmElement(t *testing.T) {
doc := parseTestHTML(`<html><body><p>the countries <em>Vokalia</em> and <em>Consonantia</em> live here</p></body></html>`)
body := findBody(doc)
node, offset := findTextInNode(body, "Vokalia and Consonantia")
if node == nil {
t.Fatal("expected to find text across <em> elements")
}
if node.Data != "Vokalia" {
t.Errorf("expected match in 'Vokalia' text node, got %q", node.Data)
}
if offset != 0 {
t.Errorf("offset = %d, want 0", offset)
}
}
func TestFindTextInNode_CrossStrongElement(t *testing.T) {
doc := parseTestHTML(`<html><body><p>Some <strong>bold and italic</strong> text here</p></body></html>`)
body := findBody(doc)
node, _ := findTextInNode(body, "bold and italic text")
if node == nil {
t.Fatal("expected to find text across <strong> boundary")
}
if node.Data != "bold and italic" {
t.Errorf("expected match in 'bold and italic' text node, got %q", node.Data)
}
}
func TestFindTextInNode_DoesNotCrossParagraphs(t *testing.T) {
doc := parseTestHTML(`<html><body><p>first paragraph</p><p>second paragraph</p></body></html>`)
body := findBody(doc)
node, _ := findTextInNode(body, "paragraph second")
if node != nil {
t.Error("should not match text across <p> boundaries")
}
}
func TestFindTextInNode_NestedFormatting(t *testing.T) {
doc := parseTestHTML(`<html><body><p>before <em><strong>bold italic</strong></em> after</p></body></html>`)
body := findBody(doc)
node, offset := findTextInNode(body, "bold italic after")
if node == nil {
t.Fatal("expected to find text across nested formatting")
}
if node.Data != "bold italic" {
t.Errorf("expected match in 'bold italic' text node, got %q", node.Data)
}
_ = offset
}
func TestFindBlockParent(t *testing.T) {
doc := parseTestHTML(`<html><body><p>text <em>inside <strong>deep</strong></em></p></body></html>`)
body := findBody(doc)
var deepNode *html.Node
var walk func(*html.Node)
walk = func(n *html.Node) {
if n.Type == html.TextNode && n.Data == "deep" {
deepNode = n
return
}
for c := n.FirstChild; c != nil; c = c.NextSibling {
walk(c)
}
}
walk(body)
if deepNode == nil {
t.Fatal("could not find 'deep' text node")
}
block := findBlockParent(deepNode)
if block == nil {
t.Fatal("expected block parent")
}
if block.Data != "p" {
t.Errorf("block parent = %q, want 'p'", block.Data)
}
}
func TestCollectInlineText(t *testing.T) {
doc := parseTestHTML(`<html><body><p>the countries <em>Vokalia</em> and <em>Consonantia</em> live</p></body></html>`)
body := findBody(doc)
var p *html.Node
var walk func(*html.Node)
walk = func(n *html.Node) {
if n.Type == html.ElementNode && n.Data == "p" {
p = n
return
}
for c := n.FirstChild; c != nil; c = c.NextSibling {
walk(c)
}
}
walk(body)
if p == nil {
t.Fatal("could not find <p> element")
}
segments := collectInlineText(p)
var collected []rune
for _, seg := range segments {
collected = append(collected, seg.runes...)
}
flattened := strings.TrimSpace(string(collected))
if flattened != "the countries Vokalia and Consonantia live" {
t.Errorf("collected text = %q", flattened)
}
}
func parseTestHTML(s string) *html.Node {
doc, err := html.Parse(strings.NewReader(s))
if err != nil {
panic(err)
}
return doc
}
func TestUsableContextText(t *testing.T) {
if ok, _ := usableContextText("C"); ok {
t.Error("single char must not be usable context")
}
if ok, _ := usableContextText("Chapter"); ok {
t.Error("single word must not be usable context")
}
if ok, norm := usableContextText("Convergence of Heaven and Earth"); !ok || norm == "" {
t.Error("full header must be usable context")
}
if ok, _ := usableContextText(""); ok {
t.Error("empty must not be usable context")
}
}
// Drop-cap regression: <p><span>C</span>onvergence of Heaven and Earth</p>.
// A device sitting on that header used to send context "C", which text
// search matched at the chapter heading ("Chapter 10") and stored doc-start
// (/4/2/1:0). Structural resolution must land in the header paragraph.
func writeDropCapEPUB(t *testing.T) string {
t.Helper()
docs := []struct {
name string
body string
}{
{"ch9.xhtml", `<body><h1>Chapter 9</h1><h1>Is the Kaphar of Christ the Gospel?</h1><p>Opening of chapter nine with some text.</p></body>`},
{"ch10.xhtml", `<body><h1>Chapter 10</h1><h1>The Three C's of the New Covenant</h1><p>The <span>C</span>leansing Life of Christ</p><p>Present yourselves as slaves for obedience, you are slaves of that same one whom you obey, either of sin resulting in death.</p><p><span>C</span>onvergence of Heaven and Earth</p><p>The overarching goal of Christ is to converge heaven and earth.</p></body>`},
}
containerXML := `<?xml version="1.0"?>
<container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
<rootfiles>
<rootfile full-path="OEBPS/content.opf" media-type="application/oebps-package+xml"/>
</rootfiles>
</container>`
manifest := ""
spineRefs := ""
for _, d := range docs {
id := d.name[:len(d.name)-len(".xhtml")]
manifest += " <item id=\"" + id + "\" href=\"" + d.name + "\" media-type=\"application/xhtml+xml\"/>\n"
spineRefs += " <itemref idref=\"" + id + "\"/>\n"
}
opf := `<?xml version="1.0" encoding="UTF-8"?>
<package xmlns="http://www.idpf.org/2007/opf" version="3.0" unique-identifier="uid">
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/">
<dc:identifier id="uid">dropcap-fixture</dc:identifier>
<dc:title>Dropcap Fixture</dc:title>
</metadata>
<manifest>
` + manifest + ` </manifest>
<spine>
` + spineRefs + ` </spine>
</package>`
path := t.TempDir() + "/dropcap.epub"
f, err := os.Create(path)
if err != nil {
t.Fatal(err)
}
defer f.Close()
zw := zip.NewWriter(f)
write := func(name, content string) {
w, err := zw.Create(name)
if err != nil {
t.Fatal(err)
}
if _, err := w.Write([]byte(content)); err != nil {
t.Fatal(err)
}
}
write("META-INF/container.xml", containerXML)
write("OEBPS/content.opf", opf)
for _, d := range docs {
write("OEBPS/"+d.name, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<html xmlns=\"http://www.w3.org/1999/xhtml\">"+d.body+"</html>\n")
}
if err := zw.Close(); err != nil {
t.Fatal(err)
}
return path
}
func TestDropCapSingleCharDoesNotHitDocStart(t *testing.T) {
c := NewCFIConverter(writeDropCapEPUB(t))
// CRE xpointer into the drop-cap header paragraph:
// DocFragment[2] = ch10 (1-based), body/p[3] = Convergence header
// (same-tag indexing, mirrors buildCREXPointer).
xp := "/body/DocFragment[2]/body/p[3]/span[1]/text().0"
result, err := c.ConvertCREToStandard(xp, 0.52, "C")
if err != nil {
t.Fatalf("ConvertCREToStandard error: %v", err)
}
t.Logf("Drop-cap single-char → %s (%s)", result.EPUBCFI, result.Precision)
if result.EPUBCFI == "" {
t.Fatal("expected non-empty epubcfi")
}
if strings.HasSuffix(result.EPUBCFI, "/4/2/1:0)") {
t.Errorf("single-char context collapsed to doc start: %s", result.EPUBCFI)
}
}
func TestDropCapStructuralLandsInHeader(t *testing.T) {
c := NewCFIConverter(writeDropCapEPUB(t))
xp := "/body/DocFragment[2]/body/p[3]/span[1]/text().0"
result, err := c.ConvertCREToStandard(xp, 0.52, "Convergence of Heaven and Earth")
if err != nil {
t.Fatalf("ConvertCREToStandard error: %v", err)
}
t.Logf("Drop-cap structural → %s (%s)", result.EPUBCFI, result.Precision)
if result.EPUBCFI == "" {
t.Fatal("expected non-empty epubcfi")
}
if strings.HasSuffix(result.EPUBCFI, "/4/2/1:0)") {
t.Errorf("full header context still collapsed to doc start: %s", result.EPUBCFI)
}
if result.Precision != "structural" && result.Precision != "exact" {
t.Errorf("expected structural/exact precision, got %s", result.Precision)
}
// Round-trip back to CRE must stay in the same fragment (web → mobile).
reverse, err := c.ConvertStandardToCRE(result.EPUBCFI, result.Percentage, "Convergence of Heaven and Earth")
if err != nil {
t.Fatalf("reverse conversion error: %v", err)
}
if reverse.XPointer == "" {
t.Fatal("expected non-empty reverse XPointer")
}
if !strings.Contains(reverse.XPointer, "DocFragment[2]") {
t.Errorf("expected reverse into DocFragment[2], got %s", reverse.XPointer)
}
}
func TestReverseIgnoresSingleCharContext(t *testing.T) {
c := NewCFIConverter(writeDropCapEPUB(t))
reverse, err := c.ConvertStandardToCRE("epubcfi(/6/4!/4/99999/1:0)", 0.5, "C")
if err != nil {
t.Fatalf("reverse conversion error: %v", err)
}
if reverse.Precision != "percentage" {
t.Errorf("single-char reverse context must fall back to percentage, got %s", reverse.Precision)
}
}
// The bookmark route supplies no context (bookmark text is a display
// label, never book text), so the facade must still resolve the drop-cap
// xpointer structurally instead of collapsing to the document start.
func TestConvertToCanonical_DropCapEmptyContext(t *testing.T) {
epubPath := writeDropCapEPUB(t)
xp := "/body/DocFragment[2]/body/p[3]/span[1]/text().0"
loc := ConvertToCanonical(LocatorSourceKOReader, xp, 0.52, "", string(FormatGroupReflowable), epubPath, "")
t.Logf("facade drop-cap (no context) → %s (%s)", loc.CFI, loc.Precision)
if loc.Precision != "structural" && loc.Precision != "exact" {
t.Fatalf("expected structural/exact precision, got %s (%s)", loc.Precision, loc.CFI)
}
if !strings.HasPrefix(loc.CFI, "epubcfi(") {
t.Fatalf("expected standard epubcfi, got %s", loc.CFI)
}
if strings.HasSuffix(loc.CFI, "/4/2/1:0)") {
t.Errorf("empty-context conversion collapsed to doc start: %s", loc.CFI)
}
}