package main

import (
	"strings"
	"testing"
)

func TestJoinURL(t *testing.T) {
	got := joinURL("https://example.com/", "/blog/", "post.html")
	if got != "https://example.com/blog/post.html" {
		t.Fatalf("unexpected URL: %s", got)
	}
}

func TestRSSDate(t *testing.T) {
	got, err := rssDate("2026-07-31")
	if err != nil {
		t.Fatal(err)
	}
	if got != "Fri, 31 Jul 2026 00:00:00 +0000" {
		t.Fatalf("unexpected RSS date: %s", got)
	}

	if _, err := rssDate("July 31"); err == nil {
		t.Fatal("expected invalid date to return an error")
	}
}

func TestMarkdownTitle(t *testing.T) {
	if got := markdownTitle("## A post title\n\nBody"); got != "A post title" {
		t.Fatalf("unexpected title: %s", got)
	}
}

func TestAddRSSDiscovery(t *testing.T) {
	oldConfig := config
	config = Config{Title: "Example & Blog", AbsoluteUrl: "https://example.com", RelativePath: "/notes"}
	defer func() { config = oldConfig }()

	got := addRSSDiscovery("<html><head></head><body></body></html>")
	if !strings.Contains(got, `rel="alternate"`) || !strings.Contains(got, `href="https://example.com/notes/rss.xml"`) {
		t.Fatalf("RSS discovery link missing: %s", got)
	}
	if !strings.Contains(got, `title="Example &amp; Blog RSS"`) {
		t.Fatalf("RSS title was not escaped: %s", got)
	}
}