Test for icon fetching

lib/Feed.php

@@ -125,7 +125,7 @@ class Feed {
         // Some feeds might use a different domain (eg: feedburner), so the site url is
         // used instead of the feed's url.
         $icon = new Favicon;
-        $this->iconUrl = $icon->find($feed->siteUrl);
+        $this->iconUrl = $icon->find($feed->siteUrl, $feed->getIcon());
         $this->iconData = $icon->getContent();
         if (strlen($this->iconData)) {
             $this->iconType = $icon->getType();

tests/cases/Feed/TestFeed.php

@@ -347,4 +347,12 @@ class TestFeed extends \JKingWeb\Arsse\Test\AbstractTest {
         $exp = "<p>Partial content, followed by more content</p>";
         $this->assertSame($exp, $f->newItems[0]->content);
     }
+
+    public function testFetchWithIcon(): void {
+        $d = base64_decode("iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAZdEVYdFNvZnR3YXJlAHBhaW50Lm5ldCA0LjAuMjHxIGmVAAAADUlEQVQYV2NgYGBgAAAABQABijPjAAAAAABJRU5ErkJggg==");
+        $f = new Feed(null, $this->base."Parsing/WithIcon");
+        $this->assertSame(self::$host."Icon", $f->iconUrl);
+        $this->assertSame("image/png", $f->iconType);
+        $this->assertSame($d, $f->iconData);
+    }
 }

tests/docroot/Feed/Parsing/WithIcon.php

@@ -0,0 +1,8 @@
+<?php return [
+    'mime'    => "application/atom+xml",
+    'content' => <<<MESSAGE_BODY
+<feed xmlns="http://www.w3.org/2005/Atom">
+    <icon>/Icon</icon>
+</feed>
+MESSAGE_BODY
+];

tests/docroot/Icon.php

@@ -0,0 +1,4 @@
+<?php return [
+    'mime'    => "image/png",
+    'content' => base64_decode("iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAZdEVYdFNvZnR3YXJlAHBhaW50Lm5ldCA0LjAuMjHxIGmVAAAADUlEQVQYV2NgYGBgAAAABQABijPjAAAAAABJRU5ErkJggg=="),
+];