atom_test.xml

<?xml version="1.0" encoding="UTF-8"?><feed xmlns="http://www.w3.org/2005/Atom">
    <title>title</title>
    <id>id</id>
    <updated>2019-01-01T00:00:00Z</updated>
    <subtitle>subtitle</subtitle>
    <link href="http://example.com"></link>
    <author>
        <name>name</name>
        <email>email@example.com</email>
    </author>
    <entry>
        <title>title</title>
        <published>2019-01-01T00:00:00+09:00</published>
        <updated>2019-01-02T00:00:00+09:00</updated>
        <id>id</id>
        <link href="http://example.com" rel="alternate"></link>
        <link href="http://example.com/image.png" rel="enclosure" type="image/png" length="0"></link>
        <summary type="html">summary_content</summary>
        <content type="html">content</content>
        <author>
            <name>name</name>
            <email>email@example.com</email>
        </author>
    </entry>
</feed>