Also fetch atom links.

test/fixtures/httpoison_mock/sakamoto.atom

@@ -0,0 +1 @@
+<?xml version="1.0"?><entry xmlns="http://www.w3.org/2005/Atom" xmlns:thr="http://purl.org/syndication/thread/1.0" xmlns:activity="http://activitystrea.ms/spec/1.0/" xmlns:poco="http://portablecontacts.net/spec/1.0" xmlns:ostatus="http://ostatus.org/schema/1.0"><activity:object-type>http://activitystrea.ms/schema/1.0/note</activity:object-type><activity:verb>http://activitystrea.ms/schema/1.0/post</activity:verb><id>https://social.sakamoto.gq/objects/0ccc1a2c-66b0-4305-b23a-7f7f2b040056</id><title>New note by eal</title><content type="html">&lt;a href='https://shitposter.club/user/5381'&gt;@shpuld&lt;/a&gt; &lt;a href='https://pleroma.hjkos.com/users/hj'&gt;@hj&lt;/a&gt; IM NOT GAY DAD</content><published>2017-08-04T12:51:26.130592Z</published><updated>2017-08-04T12:51:26.130592Z</updated><ostatus:conversation>https://pleroma.hjkos.com/contexts/53093c74-2100-4bf4-aac6-66d1973d03ef</ostatus:conversation><link ref="https://pleroma.hjkos.com/contexts/53093c74-2100-4bf4-aac6-66d1973d03ef" rel="ostatus:conversation"/><link type="application/atom+xml" href="https://social.sakamoto.gq/objects/0ccc1a2c-66b0-4305-b23a-7f7f2b040056" rel="self"/><link type="text/html" href="https://social.sakamoto.gq/objects/0ccc1a2c-66b0-4305-b23a-7f7f2b040056" rel="alternate"/><thr:in-reply-to ref="tag:shitposter.club,2017-08-04:noticeId=4027863:objectType=comment" href="https://shitposter.club/notice/4027863"/><author><id>https://social.sakamoto.gq/users/eal</id><activity:object>http://activitystrea.ms/schema/1.0/person</activity:object><uri>https://social.sakamoto.gq/users/eal</uri><poco:preferredUsername>eal</poco:preferredUsername><poco:displayName>坂本</poco:displayName><poco:note>（・ヮ・）</poco:note><name>eal</name><link rel="avatar" href="https://social.sakamoto.gq/media/7646c027-3614-4ee1-93f9-eea8f244a0d7/1A2EFE3153B9C9C3826DB511D043A26597C9F7178C8A4899FBBF808972D1659F.png"/></author><link rel="mentioned" ostatus:object-type="http://activitystrea.ms/schema/1.0/person" href="https://shitposter.club/user/5381"/><link rel="mentioned" ostatus:object-type="http://activitystrea.ms/schema/1.0/collection" href="http://activityschema.org/collection/public"/><link rel="mentioned" ostatus:object-type="http://activitystrea.ms/schema/1.0/person" href="https://pleroma.hjkos.com/users/hj"/></entry>

test/support/httpoison_mock.ex

@@ -87,6 +87,13 @@ defmodule HTTPoisonMock do
     }}
   end
 
+  def get("https://social.sakamoto.gq/users/eal/feed.atom", _body, _headers) do
+    {:ok, %Response{
+      status_code: 200,
+      body: File.read!("test/fixtures/httpoison_mock/sakamoto_eal_feed.atom")
+    }}
+  end
+
   def get("http://gs.example.org/index.php/api/statuses/user_timeline/1.atom", _body, _headers) do
     {:ok, %Response{
       status_code: 200,
@@ -142,6 +149,13 @@ defmodule HTTPoisonMock do
     }}
   end
 
+  def get("https://social.sakamoto.gq/.well-known/webfinger", [Accept: "application/xrd+xml"], [params: [resource: "https://social.sakamoto.gq/users/eal"]]) do
+    {:ok, %Response{
+      status_code: 200,
+      body: File.read!("test/fixtures/httpoison_mock/eal_sakamoto.xml")
+    }}
+  end
+
   def get("https://mamot.fr/users/Skruyb.atom", _, _) do
     {:ok, %Response{
       status_code: 200,
@@ -149,6 +163,14 @@ defmodule HTTPoisonMock do
     }}
   end
 
+  def get("https://social.sakamoto.gq/objects/0ccc1a2c-66b0-4305-b23a-7f7f2b040056", [Accept: "application/atom+xml"], _) do
+    {:ok, %Response{
+      status_code: 200,
+      body: File.read!("test/fixtures/httpoison_mock/sakamoto.atom")
+    }}
+
+  end
+
   def get(url, body, headers) do
     {:error, "Not implemented the mock response for get #{inspect(url)}, #{inspect(body)}, #{inspect(headers)}"}
   end

test/web/ostatus/ostatus_test.exs

@@ -326,11 +326,18 @@ defmodule Pleroma.Web.OStatusTest do
   describe "fetching a status by it's HTML url" do
     test "it builds a missing status from an html url" do
       url = "https://shitposter.club/notice/2827873"
-      {:ok, [activity] } = OStatus.fetch_activity_from_html_url(url)
+      {:ok, [activity] } = OStatus.fetch_activity_from_url(url)
 
       assert activity.data["actor"] == "https://shitposter.club/user/1"
       assert activity.data["object"]["id"] == "tag:shitposter.club,2017-05-05:noticeId=2827873:objectType=comment"
     end
+
+    test "it works for atom notes, too" do
+      url = "https://social.sakamoto.gq/objects/0ccc1a2c-66b0-4305-b23a-7f7f2b040056"
+      {:ok, [activity] } = OStatus.fetch_activity_from_url(url)
+      assert activity.data["actor"] == "https://social.sakamoto.gq/users/eal"
+      assert activity.data["object"]["id"] == url
+    end
   end
 
   test "insert or update a user from given data" do