package main
import (
"net/url"
"testing"
)
func TestFindLink(t *testing.T) {
tests := []struct {
name string
content string
want string
}{
{"plain", "みてみて https://example.com/article おもしろい", "https://example.com/article"},
{"query", "https://example.com/watch?v=abc&t=1", "https://example.com/watch?v=abc&t=1"},
{"trailing punctuation", "これ→https://example.com/記事。", "https://example.com/記事"},
{"first of several", "https://one.example https://two.example", "https://one.example"},
{"no link", "ただのつぶやき", ""},
{"scheme only", "http:// と書いただけ", ""},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := findLink(tt.content); got != tt.want {
t.Errorf("findLink(%q) = %q, want %q", tt.content, got, tt.want)
}
})
}
}
func TestIsYouTube(t *testing.T) {
tests := []struct {
raw string
want bool
}{
{"https://www.youtube.com/watch?v=dQw4w9WgXcQ", true},
{"https://youtu.be/dQw4w9WgXcQ?t=42", true},
{"https://www.youtube.com/shorts/abc_123", true},
{"https://youtube.com/live/abc-123", true},
{"https://m.youtube.com/watch?v=abc&feature=share", true},
{"https://www.youtube.com/", false},
{"https://www.youtube.com/watch?list=PL123", false},
{"https://youtube.com.evil.example/watch?v=abc", false},
{"https://example.com/", false},
}
for _, tt := range tests {
t.Run(tt.raw, func(t *testing.T) {
u, err := url.Parse(tt.raw)
if err != nil {
t.Fatal(err)
}
if got := isYouTube(u); got != tt.want {
t.Errorf("isYouTube(%q) = %v, want %v", tt.raw, got, tt.want)
}
})
}
}
func TestParseMetaTags(t *testing.T) {
page := &fetched{
contentType: "text/html; charset=utf-8",
body: []byte(`
plain title
`),
}
tags, err := parseMetaTags(page)
if err != nil {
t.Fatal(err)
}
want := map[string]string{
"title": "plain title",
"description": "plain description",
"og:title": "OGP タイトル",
"og:description": "OGP の説明 & その続き",
"og:image": "https://example.com/card.png",
}
for key, value := range want {
if tags[key] != value {
t.Errorf("tags[%q] = %q, want %q", key, tags[key], value)
}
}
if got := tags.first("og:title", "twitter:title", "title"); got != "OGP タイトル" {
t.Errorf("first title = %q, want the OGP one", got)
}
if got := tags.first("twitter:title", "title"); got != "plain title" {
t.Errorf("first title = %q, want the fallback", got)
}
if got := tags.first("nothing:here"); got != "" {
t.Errorf("first of an absent key = %q, want empty", got)
}
}
func TestParseMetaTagsShiftJIS(t *testing.T) {
// "テスト" encoded as Shift_JIS, declared in the Content-Type header.
body := []byte(``)
page := &fetched{contentType: "text/html; charset=Shift_JIS", body: body}
tags, err := parseMetaTags(page)
if err != nil {
t.Fatal(err)
}
if tags["og:title"] != "テスト" {
t.Errorf("og:title = %q, want テスト", tags["og:title"])
}
}
func TestParseMetaTagsTruncated(t *testing.T) {
// A page cut off at maxHTMLBytes ends mid markup; what was read still counts.
page := &fetched{
contentType: "text/html",
body: []byte(`