$this->assertRaw(t('A feed with the URL %url already exists.', ['%url' => $feeds[0]['url[0][value]']]), 'Verifying that a duplicate URL was identified');
$this->assertRaw(t('A feed named %title already exists.', ['%title' => $feeds[1]['title[0][value]']]), 'Verifying that a duplicate title was identified');
$this->assertRaw(t('A feed with the URL %url already exists.', ['%url' => $feeds[0]['url[0][value]']]), 'Verifying that a duplicate URL was identified');
$this->assertRaw(t('A feed named %title already exists.', ['%title' => $feeds[1]['title[0][value]']]), 'Verifying that a duplicate title was identified');