374 lines
11 KiB
Go
374 lines
11 KiB
Go
package convert
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import (
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"context"
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"errors"
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"strings"
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"sync"
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"testing"
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"time"
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)
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// fakeRunner records the args it was invoked with and replays canned
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// responses. Lets us assert command lines + binary refs + scratch
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// dirs without needing actual pandoc.
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type fakeRunner struct {
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mu sync.Mutex
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calls [][]string
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binaries []string
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stdin [][]byte
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scratchDir []string
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resp []byte
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err error
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}
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func (f *fakeRunner) Run(_ context.Context, binary string, stdin []byte, scratchDir string, cmd []string) ([]byte, error) {
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f.mu.Lock()
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defer f.mu.Unlock()
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f.calls = append(f.calls, append([]string(nil), cmd...))
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f.binaries = append(f.binaries, binary)
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f.stdin = append(f.stdin, append([]byte(nil), stdin...))
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f.scratchDir = append(f.scratchDir, scratchDir)
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return f.resp, f.err
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}
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func (f *fakeRunner) lastCall() (string, []string) {
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f.mu.Lock()
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defer f.mu.Unlock()
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if len(f.calls) == 0 {
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return "", nil
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}
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return f.binaries[len(f.binaries)-1], f.calls[len(f.calls)-1]
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}
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func TestConvert_Directions(t *testing.T) {
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cases := []struct {
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from, to string
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wantArgs []string // substrings that must appear in the pandoc command
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wantErr bool
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}{
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{"docx", "md", []string{"--from=docx", "--to=gfm", "--wrap=none"}, false},
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{"html", "md", []string{"--from=html", "--to=gfm", "--wrap=none"}, false},
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{"docx", "html", []string{"--from=docx", "--to=html5", "--embed-resources"}, false},
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{"html", "docx", []string{"--from=html", "--to=docx"}, false},
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{"md", "docx", []string{"--from=markdown+yaml_metadata_block", "--to=docx"}, false},
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{"md", "html", []string{"--from=markdown+yaml_metadata_block", "--to=html5"}, false},
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{"docx", "pdf", nil, true}, // pdf is markdown-only
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{"docx", "docx", nil, true}, // same-format is unsupported
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{"html", "html", nil, true},
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}
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for _, c := range cases {
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t.Run(c.from+"_to_"+c.to, func(t *testing.T) {
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f := &fakeRunner{resp: []byte("OUT")}
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InstallRunner(f)
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t.Cleanup(func() { InstallRunner(nil) })
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SetBinaries("pandoc", "chromium-browser")
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_, err := Convert(context.Background(), c.from, c.to, []byte("x"), Metadata{}, TemplateSet{})
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if c.wantErr {
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if err == nil {
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t.Fatalf("Convert(%s→%s): expected error, got nil", c.from, c.to)
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}
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return
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}
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if err != nil {
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t.Fatalf("Convert(%s→%s): %v", c.from, c.to, err)
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}
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binary, call := f.lastCall()
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if binary != "pandoc" {
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t.Errorf("expected pandoc, got %q", binary)
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}
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for _, want := range c.wantArgs {
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if !contains(call, want) {
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t.Errorf("Convert(%s→%s) missing %q in %v", c.from, c.to, want, call)
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}
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}
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// To-markdown directions inline images via the lua filter.
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if c.to == "md" {
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if !hasPrefArg(call, "--lua-filter=") || !hasSuffArg(call, "inline-media.lua") {
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t.Errorf("Convert(%s→md) missing inline-media.lua filter: %v", c.from, call)
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}
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}
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})
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}
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}
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// hasPrefArg / hasSuffArg report whether any arg has the given prefix/suffix.
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func hasPrefArg(args []string, prefix string) bool {
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for _, a := range args {
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if strings.HasPrefix(a, prefix) {
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return true
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}
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}
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return false
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}
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func hasSuffArg(args []string, suffix string) bool {
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for _, a := range args {
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if strings.HasSuffix(a, suffix) {
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return true
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}
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}
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return false
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}
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func TestToDocx_UsesPandocBinary(t *testing.T) {
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f := &fakeRunner{resp: []byte("FAKE-DOCX")}
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InstallRunner(f)
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t.Cleanup(func() { InstallRunner(nil) })
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SetBinaries("pandoc", "chromium-browser")
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out, err := ToDocx(context.Background(), []byte("# Hello\n"), Metadata{
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Title: "Hello",
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Client: "Acme",
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})
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if err != nil {
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t.Fatalf("ToDocx: %v", err)
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}
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if string(out) != "FAKE-DOCX" {
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t.Errorf("unexpected output: %q", out)
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}
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binary, call := f.lastCall()
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if binary != "pandoc" {
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t.Errorf("expected pandoc binary, got %q", binary)
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}
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if !contains(call, "--to=docx") {
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t.Errorf("missing --to=docx: %v", call)
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}
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if !contains(call, "title=Hello") {
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t.Errorf("missing title metadata: %v", call)
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}
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if !contains(call, "client=Acme") {
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t.Errorf("missing client metadata: %v", call)
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}
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// Last arg must be "-" so pandoc reads from stdin.
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if call[len(call)-1] != "-" {
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t.Errorf("expected stdin marker as last arg, got %q", call[len(call)-1])
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}
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// ToDocx is stdin → stdout — no scratch dir needed.
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if f.scratchDir[len(f.scratchDir)-1] != "" {
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t.Errorf("ToDocx should not need a scratch dir, got %q", f.scratchDir[len(f.scratchDir)-1])
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}
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}
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func TestToHTML_UsesTemplateFromScratchDir(t *testing.T) {
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f := &fakeRunner{resp: []byte("<html>fake</html>")}
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InstallRunner(f)
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t.Cleanup(func() { InstallRunner(nil) })
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SetBinaries("pandoc", "chromium-browser")
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_, err := ToHTML(context.Background(), []byte("# Hi\n"), Metadata{Title: "Hi"}, TemplateSet{})
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if err != nil {
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t.Fatalf("ToHTML: %v", err)
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}
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binary, call := f.lastCall()
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if binary != "pandoc" {
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t.Errorf("expected pandoc binary, got %q", binary)
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}
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// Template flag must reference an absolute path under the scratch
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// dir (no /tpl indirection anymore — the wrapper bind-mounts the
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// scratch dir at its own path, so absolute host paths just work).
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scratch := f.scratchDir[len(f.scratchDir)-1]
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if scratch == "" {
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t.Fatalf("ToHTML must pass a scratch dir to the runner")
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}
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wantTpl := "--template=" + scratch + "/report.html"
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if !contains(call, wantTpl) {
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t.Errorf("template flag missing/wrong; want %q in %v", wantTpl, call)
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}
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if !contains(call, "--toc") {
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t.Errorf("TOC flag missing (default NoTOC=false): %v", call)
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}
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}
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func TestToHTML_NoTOCSuppressesTOC(t *testing.T) {
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f := &fakeRunner{resp: []byte("<html/>")}
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InstallRunner(f)
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t.Cleanup(func() { InstallRunner(nil) })
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_, _ = ToHTML(context.Background(), []byte("# Hi\n"), Metadata{NoTOC: true}, TemplateSet{})
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_, call := f.lastCall()
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if contains(call, "--toc") {
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t.Errorf("TOC should be suppressed when NoTOC=true: %v", call)
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}
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if !contains(call, "no-toc=true") {
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t.Errorf("no-toc metadata variable missing: %v", call)
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}
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}
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// recordingRunner records every call and returns canned responses in
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// sequence. Lets ToPDF tests assert the two-stage pipeline (pandoc
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// then chromium).
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type recordingRunner struct {
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mu sync.Mutex
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calls []recordedCall
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resp [][]byte
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err []error
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cursor int
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}
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type recordedCall struct {
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binary string
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cmd []string
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scratch string
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}
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func (r *recordingRunner) Run(_ context.Context, binary string, _ []byte, scratch string, cmd []string) ([]byte, error) {
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r.mu.Lock()
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defer r.mu.Unlock()
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r.calls = append(r.calls, recordedCall{
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binary: binary,
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cmd: append([]string(nil), cmd...),
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scratch: scratch,
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})
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if r.cursor >= len(r.resp) {
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return nil, nil
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}
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out := r.resp[r.cursor]
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var e error
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if r.cursor < len(r.err) {
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e = r.err[r.cursor]
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}
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r.cursor++
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return out, e
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}
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func TestScratchDir_UsedByToHTML(t *testing.T) {
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f := &fakeRunner{resp: []byte("<html/>")}
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InstallRunner(f)
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t.Cleanup(func() { InstallRunner(nil); SetScratchDir("") })
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scratchRoot := t.TempDir()
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SetScratchDir(scratchRoot)
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_, err := ToHTML(context.Background(), []byte("# Hi\n"), Metadata{}, TemplateSet{})
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if err != nil {
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t.Fatalf("ToHTML: %v", err)
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}
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if len(f.scratchDir) == 0 {
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t.Fatalf("expected a scratch dir to be passed to the runner")
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}
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got := f.scratchDir[0]
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if !strings.HasPrefix(got, scratchRoot+"/") {
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t.Errorf("scratch dir not under configured root: %q (root=%q)", got, scratchRoot)
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}
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}
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func TestToPDF_TwoStagePipeline(t *testing.T) {
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// Stage 1: pandoc emits HTML. Stage 2: chromium reads HTML from
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// the scratch dir and writes out.pdf there. The fake runner can't
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// actually write the PDF, so we expect ToPDF to fail at the
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// read-back step — but we can still assert the two-stage call
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// shape and the right binary per stage.
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r := &recordingRunner{
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resp: [][]byte{
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[]byte("<html><body>fake</body></html>"), // stage 1 stdout
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nil, // stage 2 stdout (chromium writes PDF to scratch)
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},
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}
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InstallRunner(r)
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t.Cleanup(func() { InstallRunner(nil) })
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SetBinaries("pandoc", "chromium-browser")
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_, err := ToPDF(context.Background(), []byte("# Hi\n"), Metadata{}, TemplateSet{})
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// PDF read-back will fail (fake runner didn't write the file) —
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// that's expected for this test which only inspects the call shape.
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if err == nil {
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t.Fatalf("expected error from PDF read-back; got nil")
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}
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if len(r.calls) != 2 {
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t.Fatalf("expected 2 calls (pandoc + chromium); got %d", len(r.calls))
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}
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if r.calls[0].binary != "pandoc" {
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t.Errorf("stage 1 binary: got %q want pandoc", r.calls[0].binary)
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}
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if r.calls[1].binary != "chromium-browser" {
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t.Errorf("stage 2 binary: got %q want chromium-browser", r.calls[1].binary)
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}
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// Stage 2 must include --print-to-pdf pointing at an absolute
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// path under the scratch dir.
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stage2 := r.calls[1]
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if stage2.scratch == "" {
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t.Fatalf("chromium call must have a scratch dir")
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}
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wantPDF := "--print-to-pdf=" + stage2.scratch + "/out.pdf"
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if !contains(stage2.cmd, wantPDF) {
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t.Errorf("chromium call missing --print-to-pdf=%s/out.pdf: %v", stage2.scratch, stage2.cmd)
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}
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if !contains(stage2.cmd, "--no-sandbox") {
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t.Errorf("chromium call missing --no-sandbox: %v", stage2.cmd)
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}
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// Stage 2 chromium reads file://<scratch>/in.html.
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wantHTML := "file://" + stage2.scratch + "/in.html"
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if !contains(stage2.cmd, wantHTML) {
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t.Errorf("chromium call missing file:// URL: %v", stage2.cmd)
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}
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}
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func TestErrUnavailable_WhenNoRunner(t *testing.T) {
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InstallRunner(nil)
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_, err := ToDocx(context.Background(), []byte("x"), Metadata{})
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if !errors.Is(err, ErrUnavailable) {
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t.Errorf("expected ErrUnavailable, got %v", err)
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}
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}
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func TestMetadataArgs_OmitsEmptyAndOrdersStably(t *testing.T) {
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args := metadataArgs(Metadata{
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Title: "T",
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Project: "P",
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GenerationTime: time.Date(2026, 5, 13, 14, 30, 22, 0, time.UTC),
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})
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want := []string{
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"-V", "title=T",
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"-V", "project=P",
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}
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for i, w := range want {
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if i >= len(args) || args[i] != w {
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t.Fatalf("args[%d]: got %v want prefix %v", i, args, want)
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}
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}
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joined := strings.Join(args, "|")
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if !strings.Contains(joined, "generation_time=") || !strings.Contains(joined, "2026") {
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t.Errorf("generation_time missing or malformed: %v", args)
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}
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if strings.Contains(joined, "client=") {
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t.Errorf("empty client should not be passed: %v", args)
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}
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}
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func TestSingleflight_Collapses(t *testing.T) {
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var g singleflightGroup
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const N = 50
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var wg sync.WaitGroup
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var hits int32
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var mu sync.Mutex
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wg.Add(N)
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for i := 0; i < N; i++ {
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go func() {
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defer wg.Done()
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_, _ = g.Do("k", func() (any, error) {
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mu.Lock()
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hits++
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mu.Unlock()
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time.Sleep(20 * time.Millisecond)
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return "v", nil
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})
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}()
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}
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wg.Wait()
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if hits != 1 {
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t.Errorf("singleflight collapse: got %d invocations, want 1", hits)
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}
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}
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// contains reports whether haystack has needle as any of its elements.
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func contains(haystack []string, needle string) bool {
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for _, s := range haystack {
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if s == needle {
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return true
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}
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}
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return false
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}
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