[#582] Made single-pub task call Instance.set_reachable/1 if set_reachable is not specified.

Added tests.

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -792,7 +792,9 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
                  {"digest", digest}
                ]
              ) do
-      if params[:unreachable_since], do: Instances.set_reachable(inbox)
+      if !Map.has_key?(params, :unreachable_since) || params[:unreachable_since],
+        do: Instances.set_reachable(inbox)
+
       result
     else
       {_post_result, response} ->

lib/pleroma/web/salmon/salmon.ex

@@ -173,7 +173,9 @@ defmodule Pleroma.Web.Salmon do
              feed,
              [{"Content-Type", "application/magic-envelope+xml"}]
            ) do
-      if params[:unreachable_since], do: Instances.set_reachable(url)
+      if !Map.has_key?(params, :unreachable_since) || params[:unreachable_since],
+        do: Instances.set_reachable(url)
+
       Logger.debug(fn -> "Pushed to #{url}, code #{code}" end)
       :ok
     else

lib/pleroma/web/websub/websub.ex

@@ -283,7 +283,9 @@ defmodule Pleroma.Web.Websub do
                {"X-Hub-Signature", "sha1=#{signature}"}
              ]
            ) do
-      if params[:unreachable_since], do: Instances.set_reachable(callback)
+      if !Map.has_key?(params, :unreachable_since) || params[:unreachable_since],
+        do: Instances.set_reachable(callback)
+
       Logger.info(fn -> "Pushed to #{callback}, code #{code}" end)
       {:ok, code}
     else