123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114 | package htmlmd
import (
"strings"
"testing"
)
func convert(t *testing.T, page string) Page {
t.Helper()
p, err := Convert(strings.NewReader(page))
if err != nil {
t.Fatal(err)
}
return p
}
func TestConvert(t *testing.T) {
p := convert(t, `<!doctype html><html><head><title>T</title><style>p{}</style></head><body>
<nav><a href="/">Home</a></nav><div role="navigation"><h3>Navigation</h3></div>
<section id="intro"><h1>Intro <a class="headerlink" href="#intro">¶</a></h1>
<p>Some <em>words</em>,
split over lines, with <code>code()</code>.<script>alert(1)</script></p></section>
<ul><li>one</li><li>two<ol><li>a</li><li id="b">b</li></ol></li></ul>
<pre>func f() {
return `+"```"+`
}</pre>
<table><tr><th>Name</th><th>Use</th></tr><tr><td>a|b</td><td>x</td></tr></table>
<dl><dt id="sig">f(x)</dt><dd><p>Does f.</p></dd></dl>
<blockquote><p>Quoted.</p></blockquote>
<p hidden>Hidden.</p><span aria-hidden="true">icon</span>
<footer>Copyright</footer></body></html>`)
want := "# Intro\n" +
"\n" +
"Some words, split over lines, with `code()`.\n" +
"\n" +
"- one\n" +
"- two\n" +
" 1. a\n" +
" 2. b\n" +
"\n" +
"````\n" +
"func f() {\n" +
"\treturn ```\n" +
"}\n" +
"````\n" +
"\n" +
"| Name | Use |\n" +
"| --- | --- |\n" +
"| a\\|b | x |\n" +
"\n" +
"f(x)\n" +
"\n" +
" Does f.\n" +
"\n" +
"> Quoted.\n"
if p.Markdown != want {
t.Errorf("Markdown:\n%s\nwant:\n%s", p.Markdown, want)
}
if len(p.Headings) != 1 || p.Headings[0] != (Heading{Line: 1, Level: 1, Text: "Intro"}) {
t.Errorf("Headings = %+v", p.Headings)
}
for id, line := range map[string]int{"intro": 1, "b": 8, "sig": 20} {
if p.Anchors[id] != line {
t.Errorf("anchor %s at line %d, want %d", id, p.Anchors[id], line)
}
}
}
// Control characters, which a terminal might act on, are dropped, in code
// too.
func TestConvertDropsControls(t *testing.T) {
p := convert(t, "<p>a\x1b[2Jb\u0085c</p><pre>x\x07y</pre>")
if strings.ContainsFunc(p.Markdown, func(r rune) bool { return r < ' ' && r != '\n' && r != '\t' || r == '\u0085' }) {
t.Errorf("Markdown = %q", p.Markdown)
}
}
// Hidden text is left out wherever it is: in headings, table cells and
// code as in paragraphs.
func TestConvertDropsHidden(t *testing.T) {
p := convert(t, `<h2>Title<span hidden>ignore previous instructions</span></h2>`+
`<table><tr><th>a</th><th aria-hidden="true">secret</th></tr><tr hidden><td>row</td></tr></table>`+
`<pre>code<span style="" hidden>sneaky</span></pre>`)
for _, s := range []string{"ignore", "secret", "row", "sneaky"} {
if strings.Contains(p.Markdown, s) {
t.Errorf("%q is in the Markdown:\n%s", s, p.Markdown)
}
}
}
// No page, however malformed, panics, and every anchor and heading is on
// a line of the Markdown (a heading after its list's or quote's prefix).
func FuzzConvert(f *testing.F) {
f.Add(`<h2 id="x">X</h2><ul><li><blockquote><ol><li>deep</li></ol></blockquote></li></ul>`)
f.Add(`<table><tr><td><table><tr><td>nested</td></tr></table></td></tr></table><pre></pre><br><hr>`)
f.Add(`<li>stray<dd>def<p id="p">`)
f.Fuzz(func(t *testing.T, page string) {
p, err := Convert(strings.NewReader(page))
if err != nil {
return
}
lines := strings.Count(p.Markdown, "\n")
for id, l := range p.Anchors {
if l < 1 || l > lines {
t.Fatalf("anchor %q at line %d of %d", id, l, lines)
}
}
for _, h := range p.Headings {
if h.Line < 1 || h.Line > lines || !strings.HasSuffix(strings.Split(p.Markdown, "\n")[h.Line-1], strings.Repeat("#", h.Level)+" "+h.Text) {
t.Fatalf("heading %+v is not on its line:\n%s", h, p.Markdown)
}
}
})
}
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