Only have one subscription per callback.

test/web/websub/websub_test.exs

@@ -1,6 +1,12 @@
+defmodule Pleroma.Web.WebsubMock do
+  def verify(sub) do
+    {:ok, sub}
+  end
+end
 defmodule Pleroma.Web.WebsubTest do
   use Pleroma.DataCase
   alias Pleroma.Web.Websub
+  alias Pleroma.Web.Websub.WebsubServerSubscription
   import Pleroma.Factory
 
   test "a verification of a request that is accepted" do
@@ -29,7 +35,6 @@ defmodule Pleroma.Web.WebsubTest do
 
   test "a verification of a request that doesn't return 200" do
     sub = insert(:websub_subscription)
-    topic = sub.topic
 
     getter = fn (_path, _headers, _options) ->
       {:ok, %HTTPoison.Response{
@@ -41,4 +46,45 @@ defmodule Pleroma.Web.WebsubTest do
     {:error, sub} = Websub.verify(sub, getter)
     assert sub.state == "rejected"
   end
+
+  test "an incoming subscription request" do
+    user = insert(:user)
+
+    data = %{
+      "hub.callback" => "http://example.org/sub",
+      "hub.mode" => "subscription",
+      "hub.topic" => Pleroma.Web.OStatus.feed_path(user),
+      "hub.secret" => "a random secret",
+      "hub.lease_seconds" => "100"
+    }
+
+
+    {:ok, subscription } = Websub.incoming_subscription_request(user, data)
+    assert subscription.topic == Pleroma.Web.OStatus.feed_path(user)
+    assert subscription.state == "requested"
+    assert subscription.secret == "a random secret"
+    assert subscription.callback == "http://example.org/sub"
+  end
+
+  test "an incoming subscription request for an existing subscription" do
+    user = insert(:user)
+    sub = insert(:websub_subscription, state: "accepted", topic: Pleroma.Web.OStatus.feed_path(user))
+
+    data = %{
+      "hub.callback" => sub.callback,
+      "hub.mode" => "subscription",
+      "hub.topic" => Pleroma.Web.OStatus.feed_path(user),
+      "hub.secret" => "a random secret",
+      "hub.lease_seconds" => "100"
+    }
+
+
+    {:ok, subscription } = Websub.incoming_subscription_request(user, data)
+    assert subscription.topic == Pleroma.Web.OStatus.feed_path(user)
+    assert subscription.state == sub.state
+    assert subscription.secret == "a random secret"
+    assert subscription.callback == sub.callback
+    assert length(Repo.all(WebsubServerSubscription)) == 1
+    assert subscription.id == sub.id
+  end
 end