package telegram
import (
"testing"
"github.com/stretchr/testify/require"
)
func Test_markdownToTelegramHTML(t *testing.T) {
cases := []struct {
name string
input string
expected string
}{
{
name: "plain text",
input: "hello world",
expected: "hello world",
},
{
name: "bold",
input: "**bold text**",
expected: "bold text",
},
{
name: "italic",
input: "_italic text_",
expected: "italic text",
},
{
name: "link without underscores in URL",
input: "[click here](https://example.com/path)",
expected: `click here`,
},
{
name: "raw oauth url with underscores survives",
input: "Apri https://accounts.google.com/o/oauth2/auth?response_type=code&client_id=test-client&redirect_uri=http%3A%2F%2Flocalhost%3A8001%2Foauth2callback&code_challenge=abc_def&code_challenge_method=S256",
expected: `Apri https://accounts.google.com/o/oauth2/auth?response_type=code&client_id=test-client&redirect_uri=http%3A%2F%2Flocalhost%3A8001%2Foauth2callback&code_challenge=abc_def&code_challenge_method=S256`,
},
{
name: "link with underscores in URL is not corrupted by italic regex",
// Google Flights URLs use URL-safe base64 with underscores in the tfs param.
// Previously reItalic ran after reLink, matching _text_ inside href and injecting
// tags into the URL, which broke the link in Telegram.
input: "[3 → 10 сентября — от $202](https://www.google.com/travel/flights/search?tfs=CBwQAho_EgoyURL_safe_base64)",
expected: `3 → 10 сентября — от $202`,
},
{
name: "multiple links all survive",
input: "[first](https://a.com/path_one) and [second](https://b.com/path_two_x)",
expected: `first and second`,
},
{
name: "markdown link query params are escaped in href",
input: "[oauth](https://example.com/cb?response_type=code&client_id=test-client)",
expected: `oauth`,
},
{
name: "link label with HTML special chars is escaped",
input: "[a & b](https://example.com)",
expected: `a & b`,
},
{
name: "HTML special chars in plain text are escaped",
input: "a & b < c > d",
expected: "a & b < c > d",
},
{
name: "code block with language",
input: "```json\n{\n \"path\": \"README.md\"\n}\n```",
expected: "{\n \"path\": \"README.md\"\n}\n
",
},
}
for _, tc := range cases {
t.Run(tc.name, func(t *testing.T) {
actual := markdownToTelegramHTML(tc.input)
require.Equal(t, tc.expected, actual)
})
}
}