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// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package present
import (
"bytes"
"fmt"
"html/template"
"os"
"os/exec"
"path/filepath"
"runtime"
"testing"
)
func TestTestdata(t *testing.T) {
tmpl := template.Must(Template().Parse(testTmpl))
filesP, err := filepath.Glob("testdata/*.p")
if err != nil {
t.Fatal(err)
}
filesMD, err := filepath.Glob("testdata/*.md")
if err != nil {
t.Fatal(err)
}
files := append(filesP, filesMD...)
for _, file := range files {
file := file
name := filepath.Base(file)
if name == "README" {
continue
}
t.Run(name, func(t *testing.T) {
data, err := os.ReadFile(file)
if err != nil {
t.Fatalf("%s: %v", file, err)
}
marker := []byte("\n---\n")
i := bytes.Index(data, marker)
if i < 0 {
t.Fatalf("%s: cannot find --- marker in input", file)
}
input, html := data[:i+1], data[i+len(marker):]
doc, err := Parse(bytes.NewReader(input), name, 0)
if err != nil {
t.Fatalf("%s: %v", file, err)
}
var buf bytes.Buffer
if err := doc.Render(&buf, tmpl); err != nil {
t.Fatalf("%s: %v", file, err)
}
if !bytes.Equal(buf.Bytes(), html) {
diffText, err := diff("present-test-", "want", html, "have", buf.Bytes())
if err != nil {
t.Fatalf("%s: diff: %v", file, err)
}
t.Errorf("%s: incorrect html:\n%s", file, diffText)
}
})
}
}
func diff(prefix string, name1 string, b1 []byte, name2 string, b2 []byte) ([]byte, error) {
f1, err := writeTempFile(prefix, b1)
if err != nil {
return nil, err
}
defer os.Remove(f1)
f2, err := writeTempFile(prefix, b2)
if err != nil {
return nil, err
}
defer os.Remove(f2)
cmd := "diff"
if runtime.GOOS == "plan9" {
cmd = "/bin/ape/diff"
}
data, err := exec.Command(cmd, "-u", f1, f2).Output()
if len(data) > 0 {
// diff exits with a non-zero status when the files don't match.
// Ignore that failure as long as we get output.
err = nil
} else if exit, ok := err.(*exec.ExitError); ok && len(exit.Stderr) > 0 {
err = fmt.Errorf("%w\nstderr:\n%s)", err, exit.Stderr)
}
data = bytes.Replace(data, []byte(f1), []byte(name1), -1)
data = bytes.Replace(data, []byte(f2), []byte(name2), -1)
return data, err
}
func writeTempFile(prefix string, data []byte) (string, error) {
file, err := os.CreateTemp("", prefix)
if err != nil {
return "", err
}
_, err = file.Write(data)
if err1 := file.Close(); err == nil {
err = err1
}
if err != nil {
os.Remove(file.Name())
return "", err
}
return file.Name(), nil
}
var testTmpl = `
{{define "root" -}}
<h1>{{.Title}}</h1>
{{with .Subtitle}}<h2>{{.}}</h2>
{{end -}}
{{range .Authors}}<author>
{{range .Elem}}{{elem $.Template .}}{{end}}</author>
{{end -}}
{{range .Sections}}<section>{{elem $.Template .}}</section>
{{end -}}
{{end}}
{{define "newline"}}{{/* No automatic line break. Paragraphs are free-form. */}}
{{end}}
{{define "section"}}
{{if .Title}}<h2 id="TOC_{{.FormattedNumber}}">{{.Title}}</h2>
{{end -}}
{{range .Elem}}{{elem $.Template .}}{{end}}
{{- end}}
{{define "list" -}}
<ul>
{{range .Bullet -}}
<li>{{style .}}</li>
{{end -}}
</ul>
{{end}}
{{define "text" -}}
{{if .Pre -}}
<pre>{{range .Lines}}{{.}}{{end}}</pre>
{{else -}}
<p>{{range $i, $l := .Lines}}{{if $i}}{{template "newline"}}{{end}}{{style $l}}{{end}}</p>
{{end -}}
{{end}}
{{define "code" -}}
{{if .Play -}}
<div class="playground">{{.Text}}</div>
{{else -}}
<div class="code">{{.Text}}</div>
{{end -}}
{{end}}
{{define "image" -}}
<img src="{{.URL}}"{{with .Height}} height="{{.}}"{{end}}{{with .Width}} width="{{.}}"{{end}} alt="">
{{end}}
{{define "caption" -}}
<figcaption>{{style .Text}}</figcaption>
{{end}}
{{define "iframe" -}}
<iframe src="{{.URL}}"{{with .Height}} height="{{.}}"{{end}}{{with .Width}} width="{{.}}"{{end}}></iframe>
{{end}}
{{define "link" -}}
<p class="link"><a href="{{.URL}}">{{style .Label}}</a></p>
{{end}}
{{define "html" -}}{{.HTML}}{{end}}
`
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