// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
// SPDX-License-Identifier: Apache-2.0

package rss // import "miniflux.app/v2/internal/reader/rss"

import (
	"bytes"
	"testing"
	"time"
)

func TestParseRss2Sample(t *testing.T) {
	data := `
		<?xml version="1.0"?>
		<rss version="2.0">
		<channel>
			<title>Liftoff News</title>
			<link>http://liftoff.msfc.nasa.gov/</link>
			<description>Liftoff to Space Exploration.</description>
			<image>
				<url>http://liftoff.msfc.nasa.gov/HomePageXtra/MeatBall.gif</url>
				<title>NASA</title>
				<link>http://liftoff.msfc.nasa.gov/</link>
			</image>
			<language>en-us</language>
			<pubDate>Tue, 10 Jun 2003 04:00:00 GMT</pubDate>
			<lastBuildDate>Tue, 10 Jun 2003 09:41:01 GMT</lastBuildDate>
			<docs>http://blogs.law.harvard.edu/tech/rss</docs>
			<generator>Weblog Editor 2.0</generator>
			<managingEditor>editor@example.com</managingEditor>
			<webMaster>webmaster@example.com</webMaster>
			<item>
				<title>Star City</title>
				<link>http://liftoff.msfc.nasa.gov/news/2003/news-starcity.asp</link>
				<description>How do Americans get ready to work with Russians aboard the International Space Station? They take a crash course in culture, language and protocol at Russia's &lt;a href="http://howe.iki.rssi.ru/GCTC/gctc_e.htm"&gt;Star City&lt;/a&gt;.</description>
				<pubDate>Tue, 03 Jun 2003 09:39:21 GMT</pubDate>
				<guid>http://liftoff.msfc.nasa.gov/2003/06/03.html#item573</guid>
			</item>
			<item>
				<description>Sky watchers in Europe, Asia, and parts of Alaska and Canada will experience a &lt;a href="http://science.nasa.gov/headlines/y2003/30may_solareclipse.htm"&gt;partial eclipse of the Sun&lt;/a&gt; on Saturday, May 31st.</description>
				<pubDate>Fri, 30 May 2003 11:06:42 GMT</pubDate>
				<guid>http://liftoff.msfc.nasa.gov/2003/05/30.html#item572</guid>
			</item>
			<item>
				<title>The Engine That Does More</title>
				<link>http://liftoff.msfc.nasa.gov/news/2003/news-VASIMR.asp</link>
				<description>Before man travels to Mars, NASA hopes to design new engines that will let us fly through the Solar System more quickly.  The proposed VASIMR engine would do that.</description>
				<pubDate>Tue, 27 May 2003 08:37:32 GMT</pubDate>
				<guid>http://liftoff.msfc.nasa.gov/2003/05/27.html#item571</guid>
			</item>
			<item>
				<title>Astronauts' Dirty Laundry</title>
				<link>http://liftoff.msfc.nasa.gov/news/2003/news-laundry.asp</link>
				<description>Compared to earlier spacecraft, the International Space Station has many luxuries, but laundry facilities are not one of them.  Instead, astronauts have other options.</description>
				<pubDate>Tue, 20 May 2003 08:56:02 GMT</pubDate>
				<guid>http://liftoff.msfc.nasa.gov/2003/05/20.html#item570</guid>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("http://liftoff.msfc.nasa.gov/rss.xml", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Title != "Liftoff News" {
		t.Errorf("Incorrect title, got: %s", feed.Title)
	}

	if feed.Description != "Liftoff to Space Exploration." {
		t.Errorf("Incorrect description, got: %s", feed.Description)
	}

	if feed.FeedURL != "http://liftoff.msfc.nasa.gov/rss.xml" {
		t.Errorf("Incorrect feed URL, got: %s", feed.FeedURL)
	}

	if feed.SiteURL != "http://liftoff.msfc.nasa.gov/" {
		t.Errorf("Incorrect site URL, got: %s", feed.SiteURL)
	}

	if feed.IconURL != "http://liftoff.msfc.nasa.gov/HomePageXtra/MeatBall.gif" {
		t.Errorf("Incorrect image URL, got: %s", feed.IconURL)
	}

	if len(feed.Entries) != 4 {
		t.Errorf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	expectedDate := time.Date(2003, time.June, 3, 9, 39, 21, 0, time.UTC)
	if !feed.Entries[0].Date.Equal(expectedDate) {
		t.Errorf("Incorrect entry date, got: %v, want: %v", feed.Entries[0].Date, expectedDate)
	}

	if feed.Entries[0].Hash != "5b2b4ac2fe1786ddf0fd2da2f1b07f64e691264f41f2db3ea360f31bb6d9152b" {
		t.Errorf("Incorrect entry hash, got: %s", feed.Entries[0].Hash)
	}

	if feed.Entries[0].URL != "http://liftoff.msfc.nasa.gov/news/2003/news-starcity.asp" {
		t.Errorf("Incorrect entry URL, got: %s", feed.Entries[0].URL)
	}

	if feed.Entries[0].Title != "Star City" {
		t.Errorf("Incorrect entry title, got: %s", feed.Entries[0].Title)
	}

	if feed.Entries[0].Content != `How do Americans get ready to work with Russians aboard the International Space Station? They take a crash course in culture, language and protocol at Russia's <a href="http://howe.iki.rssi.ru/GCTC/gctc_e.htm">Star City</a>.` {
		t.Errorf("Incorrect entry content, got: %s", feed.Entries[0].Content)
	}

	if feed.Entries[1].URL != "http://liftoff.msfc.nasa.gov/2003/05/30.html#item572" {
		t.Errorf("Incorrect entry URL, got: %s", feed.Entries[1].URL)
	}
}

func TestParseFeedWithFeedURLWithTrailingSpace(t *testing.T) {
	data := `<?xml version="1.0"?>
		<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<atom:link href="https://example.org/rss " type="application/rss+xml" rel="self"></atom:link>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/ ", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.FeedURL != "https://example.org/rss" {
		t.Errorf("Incorrect feed URL, got: %s", feed.FeedURL)
	}
}

func TestParseFeedWithRelativeFeedURL(t *testing.T) {
	data := `<?xml version="1.0"?>
		<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<atom:link href="/rss" type="application/rss+xml" rel="self"></atom:link>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.FeedURL != "https://example.org/rss" {
		t.Errorf("Incorrect feed URL, got: %s", feed.FeedURL)
	}
}

func TestParseFeedSiteURLWithTrailingSpace(t *testing.T) {
	data := `<?xml version="1.0"?>
		<rss version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/ </link>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.SiteURL != "https://example.org/" {
		t.Errorf("Incorrect site URL, got: %s", feed.SiteURL)
	}
}

func TestParseFeedWithRelativeSiteURL(t *testing.T) {
	data := `<?xml version="1.0"?>
		<rss version="2.0">
		<channel>
			<title>Example</title>
			<link>/example </link>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.SiteURL != "https://example.org/example" {
		t.Errorf("Incorrect site URL, got: %s", feed.SiteURL)
	}
}

func TestParseFeedWithoutTitle(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<link>https://example.org/</link>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Title != "https://example.org/" {
		t.Errorf("Incorrect feed title, got: %s", feed.Title)
	}
}

func TestParseEntryWithoutTitleAndDescription(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<link>https://example.org/</link>
			<item>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Description != "" {
		t.Errorf("Expected empty feed description, got: %s", feed.Description)
	}

	if len(feed.Entries) != 1 {
		t.Errorf("Expected 1 entry, got: %d", len(feed.Entries))
	}

	if feed.Entries[0].Title != "https://example.org/item" {
		t.Errorf("Incorrect entry title, got: %s", feed.Entries[0].Title)
	}
}

func TestParseEntryWithoutTitleButWithDescription(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<link>https://example.org/</link>
			<item>
				<link>https://example.org/item</link>
				<description>
					This is the description
				</description>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Title != "This is the description" {
		t.Errorf("Incorrect entry title, got: %s", feed.Entries[0].Title)
	}
}

func TestParseEntryWithMediaTitle(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:media="http://search.yahoo.com/mrss/">
		<channel>
			<link>https://example.org/</link>
			<item>
				<title>Entry Title</title>
				<link>https://example.org/item</link>
				<media:title>Media Title</media:title>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Title != "Entry Title" {
		t.Errorf("Incorrect entry title, got: %q", feed.Entries[0].Title)
	}
}

func TestParseEntryWithDCTitleOnly(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:media="http://search.yahoo.com/mrss/" xmlns:dc="http://purl.org/dc/elements/1.1/">
		<channel>
			<link>https://example.org/</link>
			<item>
				<dc:title>Entry Title</dc:title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Title != "Entry Title" {
		t.Errorf("Incorrect entry title, got: %q", feed.Entries[0].Title)
	}
}

func TestParseFeedTitleWithHTMLEntity(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:slash="http://purl.org/rss/1.0/modules/slash/">
		<channel>
			<link>https://example.org/</link>
			<title>Example &nbsp; Feed</title>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Title != "Example \u00a0 Feed" {
		t.Errorf(`Incorrect title, got: %q`, feed.Title)
	}
}

func TestParseFeedTitleWithUnicodeEntityAndCdata(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:slash="http://purl.org/rss/1.0/modules/slash/">
		<channel>
			<link>https://example.org/</link>
			<title><![CDATA[Jenny&#8217;s Newsletter]]></title>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Title != `Jenny’s Newsletter` {
		t.Errorf(`Incorrect title, got: %q`, feed.Title)
	}
}

func TestParseItemTitleWithHTMLEntity(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:slash="http://purl.org/rss/1.0/modules/slash/">
		<channel>
			<link>https://example.org/</link>
			<title>Example</title>
			<item>
				<title>&lt;/example&gt;</title>
				<link>http://www.example.org/entries/1</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Title != "</example>" {
		t.Errorf(`Incorrect title, got: %q`, feed.Entries[0].Title)
	}
}

func TestParseItemTitleWithNumericCharacterReference(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:slash="http://purl.org/rss/1.0/modules/slash/">
		<channel>
			<link>https://example.org/</link>
			<title>Example</title>
			<item>
				<title>&#931; &#xDF;</title>
				<link>http://www.example.org/article.html</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Title != "Σ ß" {
		t.Errorf(`Incorrect title, got: %q`, feed.Entries[0].Title)
	}
}

func TestParseItemTitleWithDoubleEncodedEntities(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:slash="http://purl.org/rss/1.0/modules/slash/">
		<channel>
			<link>https://example.org/</link>
			<title>Example</title>
			<item>
				<title>&amp;#39;Text&amp;#39;</title>
				<link>http://www.example.org/article.html</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Title != "'Text'" {
		t.Errorf(`Incorrect title, got: %q`, feed.Entries[0].Title)
	}
}

func TestParseItemTitleWithWhitespaces(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
	<rss version="2.0">
	<channel>
		<title>Example</title>
		<link>http://example.org</link>
		<item>
			<title>
				Some Title
			</title>
			<link>http://www.example.org/entries/1</link>
		</item>
	</channel>
	</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Title != "Some Title" {
		t.Errorf("Incorrect entry title, got: %s", feed.Entries[0].Title)
	}
}

func TestParseItemTitleWithCDATA(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
	<rss version="2.0">
	<channel>
		<title>Example</title>
		<link>http://example.org</link>
		<item>
			<title><![CDATA[This is a title]]></title>
			<link>http://www.example.org/entries/1</link>
		</item>
	</channel>
	</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Title != "This is a title" {
		t.Errorf("Incorrect entry title, got: %s", feed.Entries[0].Title)
	}
}

func TestParseItemTitleWithInnerHTML(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
	<rss version="2.0">
	<channel>
		<title>Example</title>
		<link>http://example.org</link>
		<item>
			<title>Test: <b>bold</b></title>
			<link>http://www.example.org/entries/1</link>
		</item>
	</channel>
	</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Title != "Test: bold" {
		t.Errorf("Incorrect entry title, got: %s", feed.Entries[0].Title)
	}
}

func TestParseEntryWithoutLink(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<link>https://example.org/</link>
			<item>
				<guid isPermaLink="false">1234</guid>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].URL != "https://example.org/" {
		t.Errorf("Incorrect entry link, got: %s", feed.Entries[0].URL)
	}

	if feed.Entries[0].Hash != "03ac674216f3e15c761ee1a5e255f067953623c8b388b4459e13f978d7c846f4" {
		t.Errorf("Incorrect entry hash, got: %s", feed.Entries[0].Hash)
	}
}

func TestParseEntryWithoutLinkAndWithoutGUID(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<link>https://example.org/</link>
			<item>
				<title>Item 1</title>
			</item>
			<item>
				<title>Item 2</title>
				<pubDate>Wed, 02 Oct 2002 08:00:00 GMT</pubDate>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 2 {
		t.Errorf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	if feed.Entries[0].Hash != "c5ddfeffb275254140796b8c080f372d65ebb1b0590e238b191f595d5fcd32ca" {
		t.Errorf("Incorrect entry hash, got: %s", feed.Entries[0].Hash)
	}

	if feed.Entries[1].Hash != "0a937478f9bdbfca2de5cdeeb5ee7b09678a3330fc7cc5b05169a50d4516c9a3" {
		t.Errorf("Incorrect entry hash, got: %s", feed.Entries[1].Hash)
	}
}

func TestParseEntryWithOnlyGuidPermalink(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<link>https://example.org/</link>
			<item>
				<guid isPermaLink="true">https://example.org/some-article.html</guid>
			</item>
			<item>
				<guid>https://example.org/another-article.html</guid>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].URL != "https://example.org/some-article.html" {
		t.Errorf("Incorrect entry link, got: %s", feed.Entries[0].URL)
	}

	if feed.Entries[1].URL != "https://example.org/another-article.html" {
		t.Errorf("Incorrect entry link, got: %s", feed.Entries[1].URL)
	}
}

func TestParseEntryWithAtomLink(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
		<channel>
			<link>https://example.org/</link>
			<item>
				<title>Test</title>
				<atom:link href="https://example.org/item" />
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].URL != "https://example.org/item" {
		t.Errorf("Incorrect entry link, got: %s", feed.Entries[0].URL)
	}
}

func TestParseEntryWithMultipleAtomLinks(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
		<channel>
			<link>https://example.org/</link>
			<item>
				<title>Test</title>
				<atom:link rel="payment" href="https://example.org/a" />
				<atom:link rel="alternate" href="https://example.org/b" />
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].URL != "https://example.org/b" {
		t.Errorf("Incorrect entry link, got: %s", feed.Entries[0].URL)
	}
}

func TestParseEntryWithoutLinkAndWithEnclosureURLs(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<link>https://example.org/feed</link>
			<item>
				<guid isPermaLink="false">guid</guid>
				<enclosure url=" " length="155844084" type="audio/mpeg" />
				<enclosure url="https://audio-file" length="155844084" type="audio/mpeg" />
				<enclosure url="https://another-audio-file" length="155844084" type="audio/mpeg" />
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Fatalf("Expected 1 entry, got: %d", len(feed.Entries))
	}

	if feed.Entries[0].URL != "https://audio-file" {
		t.Errorf("Incorrect entry link, got: %q", feed.Entries[0].URL)
	}
}

func TestParseFeedURLWithAtomLink(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<atom:link href="https://example.org/rss" type="application/rss+xml" rel="self"></atom:link>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.FeedURL != "https://example.org/rss" {
		t.Errorf("Incorrect feed URL, got: %s", feed.FeedURL)
	}

	if feed.SiteURL != "https://example.org/" {
		t.Errorf("Incorrect site URL, got: %s", feed.SiteURL)
	}
}

func TestParseFeedWithWebmaster(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<webMaster>webmaster@example.com</webMaster>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := "webmaster@example.com"
	result := feed.Entries[0].Author
	if result != expected {
		t.Errorf("Incorrect entry author, got %q instead of %q", result, expected)
	}
}

func TestParseFeedWithManagingEditor(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<webMaster>webmaster@example.com</webMaster>
			<managingEditor>editor@example.com</managingEditor>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := "editor@example.com"
	result := feed.Entries[0].Author
	if result != expected {
		t.Errorf("Incorrect entry author, got %q instead of %q", result, expected)
	}
}

func TestParseEntryWithAuthorAndInnerHTML(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<atom:link href="https://example.org/rss" type="application/rss+xml" rel="self"></atom:link>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
				<author>by <a itemprop="url" class="author" rel="author" href="/author/foobar">Foo Bar</a></author>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := "by Foo Bar"
	result := feed.Entries[0].Author
	if result != expected {
		t.Errorf("Incorrect entry author, got %q instead of %q", result, expected)
	}
}

func TestParseEntryWithAuthorAndCDATA(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<atom:link href="https://example.org/rss" type="application/rss+xml" rel="self"></atom:link>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
				<author>
					<![CDATA[by Foo Bar]]>
				</author>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}
	expected := "by Foo Bar"
	result := feed.Entries[0].Author
	if result != expected {
		t.Errorf("Incorrect entry author, got %q instead of %q", result, expected)
	}
}

func TestParseEntryWithAtomAuthorEmail(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<atom:link href="https://example.org/rss" type="application/rss+xml" rel="self"></atom:link>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
				<atom:author>
					<email>author@example.org</email>
				</atom:author>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := "author@example.org"
	result := feed.Entries[0].Author
	if result != expected {
		t.Errorf("Incorrect entry author, got %q instead of %q", result, expected)
	}
}

func TestParseEntryWithAtomAuthorName(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<atom:link href="https://example.org/rss" type="application/rss+xml" rel="self"></atom:link>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
				<atom:author>
					<name>Foo Bar</name>
				</atom:author>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := "Foo Bar"
	result := feed.Entries[0].Author
	if result != expected {
		t.Errorf("Incorrect entry author, got: %q instead of %q", result, expected)
	}
}

func TestParseEntryWithDublinCoreAuthor(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
				<dc:creator>Me (me@example.com)</dc:creator>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := "Me (me@example.com)"
	result := feed.Entries[0].Author
	if result != expected {
		t.Errorf("Incorrect entry author, got %q instead of %q", result, expected)
	}
}

func TestParseEntryWithItunesAuthor(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
				<itunes:author>Someone</itunes:author>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := "Someone"
	result := feed.Entries[0].Author
	if result != expected {
		t.Errorf("Incorrect entry author, got %q instead of %q", result, expected)
	}
}

func TestParseFeedWithItunesAuthor(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<itunes:author>Someone</itunes:author>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := "Someone"
	result := feed.Entries[0].Author
	if result != expected {
		t.Errorf("Incorrect entry author, got %q instead of %q", result, expected)
	}
}

func TestParseFeedWithItunesOwner(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<itunes:owner>
				<itunes:name>John Doe</itunes:name>
				<itunes:email>john.doe@example.com</itunes:email>
			</itunes:owner>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := "John Doe"
	result := feed.Entries[0].Author
	if result != expected {
		t.Errorf("Incorrect entry author, got %q instead of %q", result, expected)
	}
}

func TestParseFeedWithItunesOwnerEmail(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<itunes:owner>
				<itunes:email>john.doe@example.com</itunes:email>
			</itunes:owner>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := "john.doe@example.com"
	result := feed.Entries[0].Author
	if result != expected {
		t.Errorf("Incorrect entry author, got %q instead of %q", result, expected)
	}
}

func TestParseEntryWithGooglePlayAuthor(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:googleplay="http://www.google.com/schemas/play-podcasts/1.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
				<googleplay:author>Someone</googleplay:author>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := "Someone"
	result := feed.Entries[0].Author
	if result != expected {
		t.Errorf("Incorrect entry author, got %q instead of %q", result, expected)
	}
}

func TestParseFeedWithGooglePlayAuthor(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:googleplay="http://www.google.com/schemas/play-podcasts/1.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<googleplay:author>Someone</googleplay:author>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := "Someone"
	result := feed.Entries[0].Author
	if result != expected {
		t.Errorf("Incorrect entry author, got %q instead of %q", result, expected)
	}
}

func TestParseEntryWithDublinCoreDate(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
				<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/">
				<channel>
					<title>Example</title>
					<link>http://example.org/</link>
					<item>
						<title>Item 1</title>
						<link>http://example.org/item1</link>
						<description>Description.</description>
						<guid isPermaLink="false">UUID</guid>
						<dc:date>2002-09-29T23:40:06-05:00</dc:date>
					</item>
				</channel>
			</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	location, _ := time.LoadLocation("EST")
	expectedDate := time.Date(2002, time.September, 29, 23, 40, 06, 0, location)
	if !feed.Entries[0].Date.Equal(expectedDate) {
		t.Errorf("Incorrect entry date, got: %v, want: %v", feed.Entries[0].Date, expectedDate)
	}
}

func TestParseEntryWithContentEncoded(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
		<channel>
			<title>Example</title>
			<link>http://example.org/</link>
			<item>
				<title>Item 1</title>
				<link>http://example.org/item1</link>
				<description>Description.</description>
				<guid isPermaLink="false">UUID</guid>
				<content:encoded><![CDATA[<p><a href="http://www.example.org/">Example</a>.</p>]]></content:encoded>
			</item>
		</channel>
	</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Content != `<p><a href="http://www.example.org/">Example</a>.</p>` {
		t.Errorf("Incorrect entry content, got: %s", feed.Entries[0].Content)
	}
}

// https://www.rssboard.org/rss-encoding-examples
func TestParseEntryDescriptionWithEncodedHTMLTags(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
		<channel>
			<title>Example</title>
			<link>http://example.org/</link>
			<item>
				<title>Item 1</title>
				<link>http://example.org/item1</link>
				<description>this is &lt;b&gt;bold&lt;/b&gt;</description>
			</item>
		</channel>
	</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Content != `this is <b>bold</b>` {
		t.Errorf("Incorrect entry content, got: %q", feed.Entries[0].Content)
	}
}

// https://www.rssboard.org/rss-encoding-examples
func TestParseEntryWithDescriptionWithHTMLCDATA(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
		<channel>
			<title>Example</title>
			<link>http://example.org/</link>
			<item>
				<title>Item 1</title>
				<link>http://example.org/item1</link>
				<description><![CDATA[this is <b>bold</b>]]></description>
			</item>
		</channel>
	</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Content != `this is <b>bold</b>` {
		t.Errorf("Incorrect entry content, got: %q", feed.Entries[0].Content)
	}
}

// https://www.rssboard.org/rss-encoding-examples
func TestParseEntryDescriptionWithEncodingAngleBracketsInText(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
		<channel>
			<title>Example</title>
			<link>http://example.org/</link>
			<item>
				<title>Item 1</title>
				<link>http://example.org/item1</link>
				<description>5 &amp;lt; 8, ticker symbol &amp;lt;BIGCO&amp;gt;</description>
			</item>
		</channel>
	</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Content != `5 &lt; 8, ticker symbol &lt;BIGCO&gt;` {
		t.Errorf("Incorrect entry content, got: %q", feed.Entries[0].Content)
	}
}

// https://www.rssboard.org/rss-encoding-examples
func TestParseEntryDescriptionWithEncodingAngleBracketsWithinCDATASection(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
		<channel>
			<title>Example</title>
			<link>http://example.org/</link>
			<item>
				<title>Item 1</title>
				<link>http://example.org/item1</link>
				<description><![CDATA[5 &lt; 8, ticker symbol &lt;BIGCO&gt;]]></description>
			</item>
		</channel>
	</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Content != `5 &lt; 8, ticker symbol &lt;BIGCO&gt;` {
		t.Errorf("Incorrect entry content, got: %q", feed.Entries[0].Content)
	}
}

func TestParseEntryWithFeedBurnerLink(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:feedburner="http://rssnamespace.org/feedburner/ext/1.0">
		<channel>
			<title>Example</title>
			<link>http://example.org/</link>
			<item>
				<title>Item 1</title>
				<link>http://example.org/item1</link>
				<feedburner:origLink>http://example.org/original</feedburner:origLink>
			</item>
		</channel>
	</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].URL != "http://example.org/original" {
		t.Errorf("Incorrect entry content, got: %s", feed.Entries[0].URL)
	}
}

func TestParseEntryWithEnclosures(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
		<title>My Podcast Feed</title>
		<link>http://example.org</link>
		<author>some.email@example.org</author>
		<item>
			<title>Podcasting with RSS</title>
			<link>http://www.example.org/entries/1</link>
			<description>An overview of RSS podcasting</description>
			<pubDate>Fri, 15 Jul 2005 00:00:00 -0500</pubDate>
			<guid isPermaLink="true">http://www.example.org/entries/1</guid>
			<enclosure url="http://www.example.org/myaudiofile.mp3"
					length="12345"
					type="audio/mpeg" />
		</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Fatalf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	if len(feed.Entries[0].Enclosures) != 1 {
		t.Fatalf("Incorrect number of enclosures, got: %d", len(feed.Entries[0].Enclosures))
	}

	if feed.Entries[0].Enclosures[0].URL != "http://www.example.org/myaudiofile.mp3" {
		t.Errorf("Incorrect enclosure URL, got: %s", feed.Entries[0].Enclosures[0].URL)
	}

	if feed.Entries[0].Enclosures[0].MimeType != "audio/mpeg" {
		t.Errorf("Incorrect enclosure type, got: %s", feed.Entries[0].Enclosures[0].MimeType)
	}

	if feed.Entries[0].Enclosures[0].Size != 12345 {
		t.Errorf("Incorrect enclosure length, got: %d", feed.Entries[0].Enclosures[0].Size)
	}
}

func TestParseEntryWithIncorrectEnclosureLength(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
		<title>My Podcast Feed</title>
		<link>http://example.org</link>
		<author>some.email@example.org</author>
		<item>
			<title>Podcasting with RSS</title>
			<link>http://www.example.org/entries/1</link>
			<description>An overview of RSS podcasting</description>
			<pubDate>Fri, 15 Jul 2005 00:00:00 -0500</pubDate>
			<guid isPermaLink="true">http://www.example.org/entries/1</guid>
			<enclosure url="http://www.example.org/myaudiofile.mp3" length="invalid" type="audio/mpeg" />
			<enclosure url="http://www.example.org/myaudiofile.wav" length=" " type="audio" />
		</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Fatalf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	if len(feed.Entries[0].Enclosures) != 2 {
		t.Fatalf("Incorrect number of enclosures, got: %d", len(feed.Entries[0].Enclosures))
	}

	if feed.Entries[0].Enclosures[0].URL != "http://www.example.org/myaudiofile.mp3" {
		t.Errorf("Incorrect enclosure URL, got: %s", feed.Entries[0].Enclosures[0].URL)
	}

	if feed.Entries[0].Enclosures[0].MimeType != "audio/mpeg" {
		t.Errorf("Incorrect enclosure type, got: %s", feed.Entries[0].Enclosures[0].MimeType)
	}

	if feed.Entries[0].Enclosures[0].Size != 0 {
		t.Errorf("Incorrect enclosure length, got: %d", feed.Entries[0].Enclosures[0].Size)
	}

	if feed.Entries[0].Enclosures[1].Size != 0 {
		t.Errorf("Incorrect enclosure length, got: %d", feed.Entries[0].Enclosures[0].Size)
	}
}

func TestParseEntryWithDuplicatedEnclosureURL(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
		<title>My Podcast Feed</title>
		<link>http://example.org</link>
		<item>
			<title>Podcasting with RSS</title>
			<link>http://www.example.org/entries/1</link>
			<enclosure url="http://www.example.org/myaudiofile.mp3" type="audio/mpeg" />
			<enclosure url="   http://www.example.org/myaudiofile.mp3   " type="audio/mpeg" />
		</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Fatalf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	if len(feed.Entries[0].Enclosures) != 1 {
		t.Fatalf("Incorrect number of enclosures, got: %d", len(feed.Entries[0].Enclosures))
	}

	if feed.Entries[0].Enclosures[0].URL != "http://www.example.org/myaudiofile.mp3" {
		t.Errorf("Incorrect enclosure URL, got: %s", feed.Entries[0].Enclosures[0].URL)
	}
}

func TestParseEntryWithEmptyEnclosureURL(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
		<title>My Podcast Feed</title>
		<link>http://example.org</link>
		<author>some.email@example.org</author>
		<item>
			<title>Podcasting with RSS</title>
			<link>http://www.example.org/entries/1</link>
			<description>An overview of RSS podcasting</description>
			<pubDate>Fri, 15 Jul 2005 00:00:00 -0500</pubDate>
			<guid isPermaLink="true">http://www.example.org/entries/1</guid>
			<enclosure url=" " length="0"/>
		</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Fatalf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	if len(feed.Entries[0].Enclosures) != 0 {
		t.Fatalf("Incorrect number of enclosures, got: %d", len(feed.Entries[0].Enclosures))
	}
}

func TestParseEntryWithRelativeEnclosureURL(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
		<title>My Podcast Feed</title>
		<link>http://example.org</link>
		<author>some.email@example.org</author>
		<item>
			<title>Podcasting with RSS</title>
			<link>http://www.example.org/entries/1</link>
			<description>An overview of RSS podcasting</description>
			<pubDate>Fri, 15 Jul 2005 00:00:00 -0500</pubDate>
			<guid isPermaLink="true">http://www.example.org/entries/1</guid>
			<enclosure url=" /files/file.mp3  "/>
		</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Fatalf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	if len(feed.Entries[0].Enclosures) != 1 {
		t.Fatalf("Incorrect number of enclosures, got: %d", len(feed.Entries[0].Enclosures))
	}

	if feed.Entries[0].Enclosures[0].URL != "http://example.org/files/file.mp3" {
		t.Errorf("Incorrect enclosure URL, got: %q", feed.Entries[0].Enclosures[0].URL)
	}
}

func TestParseEntryWithFeedBurnerEnclosures(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:feedburner="http://rssnamespace.org/feedburner/ext/1.0">
		<channel>
		<title>My Example Feed</title>
		<link>http://example.org</link>
		<author>some.email@example.org</author>
		<item>
			<title>Example Item</title>
			<link>http://www.example.org/entries/1</link>
			<enclosure
				url="http://feedproxy.google.com/~r/example/~5/lpMyFSCvubs/File.mp3"
				length="76192460"
				type="audio/mpeg" />
			<feedburner:origEnclosureLink>http://example.org/67ca416c-f22a-4228-a681-68fc9998ec10/File.mp3</feedburner:origEnclosureLink>
		</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Fatalf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	if len(feed.Entries[0].Enclosures) != 1 {
		t.Fatalf("Incorrect number of enclosures, got: %d", len(feed.Entries[0].Enclosures))
	}

	if feed.Entries[0].Enclosures[0].URL != "http://example.org/67ca416c-f22a-4228-a681-68fc9998ec10/File.mp3" {
		t.Errorf("Incorrect enclosure URL, got: %s", feed.Entries[0].Enclosures[0].URL)
	}

	if feed.Entries[0].Enclosures[0].MimeType != "audio/mpeg" {
		t.Errorf("Incorrect enclosure type, got: %s", feed.Entries[0].Enclosures[0].MimeType)
	}

	if feed.Entries[0].Enclosures[0].Size != 76192460 {
		t.Errorf("Incorrect enclosure length, got: %d", feed.Entries[0].Enclosures[0].Size)
	}
}

func TestParseEntryWithFeedBurnerEnclosuresAndRelativeURL(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:feedburner="http://rssnamespace.org/feedburner/ext/1.0">
		<channel>
		<title>My Example Feed</title>
		<link>http://example.org</link>
		<item>
			<title>Example Item</title>
			<link>http://www.example.org/entries/1</link>
			<enclosure
				url="http://feedproxy.google.com/~r/example/~5/lpMyFSCvubs/File.mp3"
				length="76192460"
				type="audio/mpeg" />
			<feedburner:origEnclosureLink>/67ca416c-f22a-4228-a681-68fc9998ec10/File.mp3</feedburner:origEnclosureLink>
		</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Errorf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	if len(feed.Entries[0].Enclosures) != 1 {
		t.Fatalf("Incorrect number of enclosures, got: %d", len(feed.Entries[0].Enclosures))
	}

	if feed.Entries[0].Enclosures[0].URL != "http://example.org/67ca416c-f22a-4228-a681-68fc9998ec10/File.mp3" {
		t.Errorf("Incorrect enclosure URL, got: %s", feed.Entries[0].Enclosures[0].URL)
	}
}

func TestParseEntryWithRelativeURL(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<link>https://example.org/</link>
			<item>
				<link>item.html</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].Title != "https://example.org/item.html" {
		t.Errorf("Incorrect entry title, got: %s", feed.Entries[0].Title)
	}
}

func TestParseEntryWithCommentsURL(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:slash="http://purl.org/rss/1.0/modules/slash/">
		<channel>
			<link>https://example.org/</link>
			<item>
				<title>Item 1</title>
				<link>https://example.org/item1</link>
				<comments>
					https://example.org/comments
				</comments>
				<slash:comments>42</slash:comments>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].CommentsURL != "https://example.org/comments" {
		t.Errorf("Incorrect entry comments URL, got: %q", feed.Entries[0].CommentsURL)
	}
}

func TestParseEntryWithInvalidCommentsURL(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:slash="http://purl.org/rss/1.0/modules/slash/">
		<channel>
			<link>https://example.org/</link>
			<item>
				<title>Item 1</title>
				<link>https://example.org/item1</link>
				<comments>
					Some text
				</comments>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.Entries[0].CommentsURL != "" {
		t.Errorf("Incorrect entry comments URL, got: %q", feed.Entries[0].CommentsURL)
	}
}

func TestParseInvalidXml(t *testing.T) {
	data := `garbage`
	_, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err == nil {
		t.Error("Parse should returns an error")
	}
}

func TestParseFeedLinkWithInvalidCharacterEntity(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:slash="http://purl.org/rss/1.0/modules/slash/">
		<channel>
			<link>https://example.org/a&b</link>
			<title>Example Feed</title>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.SiteURL != "https://example.org/a&b" {
		t.Errorf(`Incorrect url, got: %q`, feed.SiteURL)
	}
}

func TestParseEntryWithMediaGroup(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:media="http://search.yahoo.com/mrss/">
		<channel>
		<title>My Example Feed</title>
		<link>https://example.org</link>
		<item>
			<title>Example Item</title>
			<link>http://www.example.org/entries/1</link>
			<enclosure type="application/x-bittorrent" url="https://example.org/file3.torrent" length="670053113">
			</enclosure>
			<media:group>
				<media:content type="application/x-bittorrent" url="https://example.org/file1.torrent"></media:content>
				<media:content type="application/x-bittorrent" url="https://example.org/file2.torrent" isDefault="true"></media:content>
				<media:content type="application/x-bittorrent" url="https://example.org/file3.torrent"></media:content>
				<media:content type="application/x-bittorrent" url="https://example.org/file4.torrent"></media:content>
				<media:content type="application/x-bittorrent" url="https://example.org/file4.torrent"></media:content>
				<media:content type="application/x-bittorrent" url=" file5.torrent  " fileSize="42"></media:content>
				<media:content type="application/x-bittorrent" url="  " fileSize="42"></media:content>
				<media:rating>nonadult</media:rating>
			</media:group>
			<media:thumbnail url="https://example.org/image.jpg" height="122" width="223"></media:thumbnail>
		</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Errorf("Incorrect number of entries, got: %d", len(feed.Entries))
	}
	if len(feed.Entries[0].Enclosures) != 6 {
		t.Fatalf("Incorrect number of enclosures, got: %d", len(feed.Entries[0].Enclosures))
	}

	expectedResults := []struct {
		url      string
		mimeType string
		size     int64
	}{
		{"https://example.org/image.jpg", "image/*", 0},
		{"https://example.org/file3.torrent", "application/x-bittorrent", 670053113},
		{"https://example.org/file1.torrent", "application/x-bittorrent", 0},
		{"https://example.org/file2.torrent", "application/x-bittorrent", 0},
		{"https://example.org/file4.torrent", "application/x-bittorrent", 0},
		{"https://example.org/file5.torrent", "application/x-bittorrent", 42},
	}

	for index, enclosure := range feed.Entries[0].Enclosures {
		if expectedResults[index].url != enclosure.URL {
			t.Errorf(`Unexpected enclosure URL, got %q instead of %q`, enclosure.URL, expectedResults[index].url)
		}

		if expectedResults[index].mimeType != enclosure.MimeType {
			t.Errorf(`Unexpected enclosure type, got %q instead of %q`, enclosure.MimeType, expectedResults[index].mimeType)
		}

		if expectedResults[index].size != enclosure.Size {
			t.Errorf(`Unexpected enclosure size, got %d instead of %d`, enclosure.Size, expectedResults[index].size)
		}
	}
}

func TestParseEntryWithMediaContent(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:media="http://search.yahoo.com/mrss/">
		<channel>
		<title>My Example Feed</title>
		<link>https://example.org</link>
		<item>
			<title>Example Item</title>
			<link>http://www.example.org/entries/1</link>
			<media:thumbnail url="https://example.org/thumbnail.jpg" />
			<media:thumbnail url="https://example.org/thumbnail.jpg" />
			<media:thumbnail url=" thumbnail.jpg  " />
			<media:thumbnail url="   " />
			<media:content url="https://example.org/media1.jpg" medium="image">
				<media:title type="html">Some Title for Media 1</media:title>
			</media:content>
			<media:content url="   /media2.jpg   " medium="image" />
			<media:content url="    " medium="image" />
		</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Fatalf("Incorrect number of entries, got: %d", len(feed.Entries))
	}
	if len(feed.Entries[0].Enclosures) != 3 {
		t.Fatalf("Incorrect number of enclosures, got: %d", len(feed.Entries[0].Enclosures))
	}

	expectedResults := []struct {
		url      string
		mimeType string
		size     int64
	}{
		{"https://example.org/thumbnail.jpg", "image/*", 0},
		{"https://example.org/media1.jpg", "image/*", 0},
		{"https://example.org/media2.jpg", "image/*", 0},
	}

	for index, enclosure := range feed.Entries[0].Enclosures {
		if expectedResults[index].url != enclosure.URL {
			t.Errorf(`Unexpected enclosure URL, got %q instead of %q`, enclosure.URL, expectedResults[index].url)
		}

		if expectedResults[index].mimeType != enclosure.MimeType {
			t.Errorf(`Unexpected enclosure type, got %q instead of %q`, enclosure.MimeType, expectedResults[index].mimeType)
		}

		if expectedResults[index].size != enclosure.Size {
			t.Errorf(`Unexpected enclosure size, got %d instead of %d`, enclosure.Size, expectedResults[index].size)
		}
	}
}

func TestParseEntryWithMediaPeerLink(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0" xmlns:media="http://search.yahoo.com/mrss/">
		<channel>
		<title>My Example Feed</title>
		<link>https://website.example.org</link>
		<item>
			<title>Example Item</title>
			<link>http://www.example.org/entries/1</link>
			<media:peerLink type="application/x-bittorrent" href="https://www.example.org/file.torrent" />
			<media:peerLink type="application/x-bittorrent" href="https://www.example.org/file.torrent" />
			<media:peerLink type="application/x-bittorrent" href="  file2.torrent   " />
			<media:peerLink type="application/x-bittorrent" href="    " />
		</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Fatalf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	if len(feed.Entries[0].Enclosures) != 2 {
		t.Fatalf("Incorrect number of enclosures, got: %d", len(feed.Entries[0].Enclosures))
	}

	expectedResults := []struct {
		url      string
		mimeType string
		size     int64
	}{
		{"https://www.example.org/file.torrent", "application/x-bittorrent", 0},
		{"https://website.example.org/file2.torrent", "application/x-bittorrent", 0},
	}

	for index, enclosure := range feed.Entries[0].Enclosures {
		if expectedResults[index].url != enclosure.URL {
			t.Errorf(`Unexpected enclosure URL, got %q instead of %q`, enclosure.URL, expectedResults[index].url)
		}

		if expectedResults[index].mimeType != enclosure.MimeType {
			t.Errorf(`Unexpected enclosure type, got %q instead of %q`, enclosure.MimeType, expectedResults[index].mimeType)
		}

		if expectedResults[index].size != enclosure.Size {
			t.Errorf(`Unexpected enclosure size, got %d instead of %d`, enclosure.Size, expectedResults[index].size)
		}
	}
}

func TestParseItunesDuration(t *testing.T) {
	data := `<?xml version="1.0" encoding="UTF-8"?>
		<rss version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
		<channel>
			<title>Podcast Example</title>
			<link>http://www.example.com/index.html</link>
			<item>
				<title>Podcast Episode</title>
				<guid>http://example.com/episode.m4a</guid>
				<pubDate>Tue, 08 Mar 2016 12:00:00 GMT</pubDate>
				<itunes:duration>1:23:45</itunes:duration>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := 83
	result := feed.Entries[0].ReadingTime
	if expected != result {
		t.Errorf(`Unexpected podcast duration, got %d instead of %d`, result, expected)
	}
}

func TestParseIncorrectItunesDuration(t *testing.T) {
	data := `<?xml version="1.0" encoding="UTF-8"?>
		<rss version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
		<channel>
			<title>Podcast Example</title>
			<link>http://www.example.com/index.html</link>
			<item>
				<title>Podcast Episode</title>
				<guid>http://example.com/episode.m4a</guid>
				<pubDate>Tue, 08 Mar 2016 12:00:00 GMT</pubDate>
				<itunes:duration>invalid</itunes:duration>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	expected := 0
	result := feed.Entries[0].ReadingTime
	if expected != result {
		t.Errorf(`Unexpected podcast duration, got %d instead of %d`, result, expected)
	}
}

func TestEntryDescriptionFromItunesSummary(t *testing.T) {
	data := `<?xml version="1.0" encoding="UTF-8"?>
	<rss version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
		<channel>
			<title>Podcast Example</title>
			<link>http://www.example.com/index.html</link>
			<item>
				<title>Podcast Episode</title>
				<guid>http://example.com/episode.m4a</guid>
				<pubDate>Tue, 08 Mar 2016 12:00:00 GMT</pubDate>
				<itunes:subtitle>Episode Subtitle</itunes:subtitle>
				<itunes:summary>Episode Summary</itunes:summary>
			</item>
		</channel>
	</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Errorf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	expected := "Episode Summary"
	result := feed.Entries[0].Content
	if expected != result {
		t.Errorf(`Unexpected podcast content, got %q instead of %q`, result, expected)
	}
}

func TestEntryDescriptionFromItunesSubtitle(t *testing.T) {
	data := `<?xml version="1.0" encoding="UTF-8"?>
	<rss version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
		<channel>
			<title>Podcast Example</title>
			<link>http://www.example.com/index.html</link>
			<item>
				<title>Podcast Episode</title>
				<guid>http://example.com/episode.m4a</guid>
				<pubDate>Tue, 08 Mar 2016 12:00:00 GMT</pubDate>
				<itunes:subtitle>Episode Subtitle</itunes:subtitle>
			</item>
		</channel>
	</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Errorf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	expected := "Episode Subtitle"
	result := feed.Entries[0].Content
	if expected != result {
		t.Errorf(`Unexpected podcast content, got %q instead of %q`, result, expected)
	}
}

func TestEntryDescriptionFromGooglePlayDescription(t *testing.T) {
	data := `<?xml version="1.0" encoding="UTF-8"?>
	<rss version="2.0"
		xmlns:googleplay="http://www.google.com/schemas/play-podcasts/1.0"
		xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
		<channel>
			<title>Podcast Example</title>
			<link>http://www.example.com/index.html</link>
			<item>
				<title>Podcast Episode</title>
				<guid>http://example.com/episode.m4a</guid>
				<pubDate>Tue, 08 Mar 2016 12:00:00 GMT</pubDate>
				<itunes:subtitle>Episode Subtitle</itunes:subtitle>
				<googleplay:description>Episode Description</googleplay:description>
			</item>
		</channel>
	</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Errorf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	expected := "Episode Description"
	result := feed.Entries[0].Content
	if expected != result {
		t.Errorf(`Unexpected podcast content, got %q instead of %q`, result, expected)
	}
}

func TestParseEntryWithRSSDescriptionAndMediaDescription(t *testing.T) {
	data := `<?xml version="1.0" encoding="UTF-8"?>
	<rss version="2.0" xmlns:media="http://search.yahoo.com/mrss/">
		<channel>
			<title>Podcast Example</title>
			<link>http://www.example.com/index.html</link>
			<item>
				<title>Entry Title</title>
				<link>http://www.example.com/entries/1</link>
				<description>Entry Description</description>
				<media:description type="plain">Media Description</media:description>
			</item>
		</channel>
	</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 1 {
		t.Errorf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	expected := "Entry Description"
	result := feed.Entries[0].Content
	if expected != result {
		t.Errorf(`Unexpected description, got %q instead of %q`, result, expected)
	}
}

func TestParseFeedWithCategories(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<category>Category 1</category>
			<category><![CDATA[Category 2]]></category>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries[0].Tags) != 2 {
		t.Errorf("Incorrect number of tags, got: %d", len(feed.Entries[0].Tags))
	}

	expected := []string{"Category 1", "Category 2"}
	result := feed.Entries[0].Tags

	for i, tag := range result {
		if tag != expected[i] {
			t.Errorf("Incorrect tag, got: %q", tag)
		}
	}
}

func TestParseEntryWithCategories(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<category>Category 3</category>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
				<category>Category 1</category>
				<category><![CDATA[Category 2]]></category>
				<category>Category 2</category>
				<category>Category 0</category>
				<category>   </category>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries[0].Tags) != 3 {
		t.Fatalf("Incorrect number of tags, got: %d", len(feed.Entries[0].Tags))
	}

	expected := []string{"Category 0", "Category 1", "Category 2"}
	result := feed.Entries[0].Tags

	for i, tag := range result {
		if tag != expected[i] {
			t.Errorf("Incorrect tag, got: %q", tag)
		}
	}
}

func TestParseFeedWithItunesCategories(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss xmlns:atom="http://www.w3.org/2005/Atom" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<itunes:category text="Society &amp; Culture">
				<itunes:category text="Documentary" />
			</itunes:category>
			<itunes:category text="Health">
				<itunes:category text="Mental Health" />
			</itunes:category>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries[0].Tags) != 4 {
		t.Errorf("Incorrect number of tags, got: %d", len(feed.Entries[0].Tags))
	}

	expected := []string{"Documentary", "Health", "Mental Health", "Society & Culture"}
	result := feed.Entries[0].Tags

	for i, tag := range result {
		if tag != expected[i] {
			t.Errorf("Incorrect tag, got: %q", tag)
		}
	}
}

func TestParseFeedWithGooglePlayCategory(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss xmlns:atom="http://www.w3.org/2005/Atom" xmlns:gplay="http://www.google.com/schemas/play-podcasts/1.0" version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<gplay:category text="Art"></gplay:category>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries[0].Tags) != 1 {
		t.Errorf("Incorrect number of tags, got: %d", len(feed.Entries[0].Tags))
	}

	expected := []string{"Art"}
	result := feed.Entries[0].Tags

	for i, tag := range result {
		if tag != expected[i] {
			t.Errorf("Incorrect tag, got: %q", tag)
		}
	}
}

func TestParseEntryWithMediaCategories(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss xmlns:atom="http://www.w3.org/2005/Atom" xmlns:media="http://search.yahoo.com/mrss/" version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
				<media:category label="Visual Art">visual_art</media:category>
				<media:category scheme="http://search.yahoo.com/mrss/category_ schema">music/artist/album/song</media:category>
				<media:category scheme="urn:flickr:tags">ycantpark mobile</media:category>
				<media:category scheme="http://dmoz.org" label="Ace Ventura - Pet Detective">Arts/Movies/Titles/A/Ace_Ventura_Series/Ace_Ventura_ -_Pet_Detective</media:category>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries[0].Tags) != 2 {
		t.Errorf("Incorrect number of tags, got: %d", len(feed.Entries[0].Tags))
	}

	expected := []string{"Ace Ventura - Pet Detective", "Visual Art"}
	result := feed.Entries[0].Tags

	for i, tag := range result {
		if tag != expected[i] {
			t.Errorf("Incorrect entry tag, got %q instead of %q", tag, expected[i])
		}
	}
}

func TestParseFeedWithTTLField(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<ttl>60</ttl>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.TTL != 60*time.Minute {
		t.Errorf("Incorrect TTL, got: %d", feed.TTL)
	}
}

func TestParseFeedWithIncorrectTTLValue(t *testing.T) {
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<title>Example</title>
			<link>https://example.org/</link>
			<ttl>invalid</ttl>
			<item>
				<title>Test</title>
				<link>https://example.org/item</link>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if feed.TTL != 0 {
		t.Errorf("Incorrect TTL, got: %d", feed.TTL)
	}
}

func TestParseEntriesWithDuplicateGUIDAndDistinctLinks(t *testing.T) {
	// Some non-conformant feeds (e.g. fluentboards.com) ship the same <guid>
	// for every item. The first occurrence must keep the historical
	// SHA256(guid) hash so previously stored entries still match, while later
	// duplicates are disambiguated using the entry URL.
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<link>https://example.org/</link>
			<item>
				<title>Item A</title>
				<link>https://example.org/a</link>
				<guid isPermaLink="false">dup-guid</guid>
			</item>
			<item>
				<title>Item B</title>
				<link>https://example.org/b</link>
				<guid isPermaLink="false">dup-guid</guid>
			</item>
			<item>
				<title>Item C</title>
				<link>https://example.org/a</link>
				<guid isPermaLink="false">dup-guid</guid>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 3 {
		t.Fatalf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	expected := []string{
		"22561495b53d916c228504600fda7c06cefc55a80395bbdf007102a6e9070d3f", // SHA256("dup-guid")
		"3479bd288c08f8d2f8e992aa511a267ee50b18e22a4c475a4862c15c4d4f675b", // SHA256("dup-guid|https://example.org/b")
		"8e4bb51d800e7a0db6b81b48d09af4711f8a25e00d09251e3d9f675e02bfe11e", // SHA256("dup-guid|https://example.org/a")
	}
	for i, want := range expected {
		if feed.Entries[i].Hash != want {
			t.Errorf("Entry %d: incorrect hash, got: %s, want: %s", i, feed.Entries[i].Hash, want)
		}
	}

	// Sanity-check uniqueness across all three entries.
	seen := make(map[string]bool)
	for _, e := range feed.Entries {
		if seen[e.Hash] {
			t.Errorf("Duplicate hash across entries: %s", e.Hash)
		}
		seen[e.Hash] = true
	}
}

func TestParseEntriesWithDuplicateGUIDAndNoLink(t *testing.T) {
	// When colliding entries also lack a usable URL, we fall back to the
	// position-based disambiguator. The site URL is used as the entry URL
	// fallback (see findEntryURL handling), so the second entry hashes
	// against that URL rather than the position.
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<link>https://example.org/</link>
			<item>
				<title>Item A</title>
				<guid isPermaLink="false">dup-guid</guid>
			</item>
			<item>
				<title>Item B</title>
				<guid isPermaLink="false">dup-guid</guid>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 2 {
		t.Fatalf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	if feed.Entries[0].Hash != "22561495b53d916c228504600fda7c06cefc55a80395bbdf007102a6e9070d3f" {
		t.Errorf("Entry 0: incorrect hash, got: %s", feed.Entries[0].Hash)
	}
	// Both items fall back to the channel link as their URL, so the second
	// hash uses "dup-guid|https://example.org/".
	if feed.Entries[1].Hash != "175d6d57a61533fb553c5d9bc3d52aa9092553a7e0ae473e3536c32c87cfa418" {
		t.Errorf("Entry 1: incorrect hash, got: %s", feed.Entries[1].Hash)
	}
	if feed.Entries[0].Hash == feed.Entries[1].Hash {
		t.Errorf("Hashes should differ for duplicate-GUID items")
	}
}

func TestParseEntriesWithUniqueGUIDsAreUnchanged(t *testing.T) {
	// Regression guard: feeds with unique GUIDs must keep the historical
	// SHA256(guid) hashing so existing stored entries are not duplicated.
	data := `<?xml version="1.0" encoding="utf-8"?>
		<rss version="2.0">
		<channel>
			<link>https://example.org/</link>
			<item>
				<title>Item A</title>
				<link>https://example.org/a</link>
				<guid isPermaLink="false">guid-a</guid>
			</item>
			<item>
				<title>Item B</title>
				<link>https://example.org/b</link>
				<guid isPermaLink="false">guid-b</guid>
			</item>
		</channel>
		</rss>`

	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
	if err != nil {
		t.Fatal(err)
	}

	if len(feed.Entries) != 2 {
		t.Fatalf("Incorrect number of entries, got: %d", len(feed.Entries))
	}

	if feed.Entries[0].Hash != "2b13a8de1741fb778d7e733e7a888088cb578d22e5ec6d40e0a88f82d4829cbd" {
		t.Errorf("Entry 0: incorrect hash, got: %s", feed.Entries[0].Hash)
	}
	if feed.Entries[1].Hash != "33ce1b8657a81c6a49590313a36325e44683f27229e96faa690f9dc7b2a75d2a" {
		t.Errorf("Entry 1: incorrect hash, got: %s", feed.Entries[1].Hash)
	}
}
