Fixed the relevant? method for Registry v2.3

Signed-off-by: Miquel Sabaté Solà <msabate@suse.com>

lib/portus/registry_notification.rb

@@ -18,7 +18,7 @@ def self.process!(data, handler)
     def self.relevant?(event)
       return false unless event["action"] == "push"
       return false unless event["target"].is_a?(Hash)
-      event["target"]["mediaType"] == "application/vnd.docker.distribution.manifest.v1+json"
+      event["target"]["mediaType"].start_with? "application/vnd.docker.distribution.manifest"
     end
   end
 end

spec/lib/portus/registry_notification_spec.rb

@@ -27,9 +27,44 @@
     }
   end
 
+  # This is a real even notification as given by docker distribution v2.3
+  # rubocop:disable Metrics/LineLength
+  let(:version23) do
+    {
+      "id"        => "7dc1c55c-dfe2-4699-ab0b-8f32e89882ce",
+      "timestamp" => "2016-02-05T11:16:14.917994087+01:00",
+      "action"    => "push",
+      "target"    => {
+        "mediaType"  => "application/vnd.docker.distribution.manifest.v1+prettyjws",
+        "size"       => 2739,
+        "digest"     => "sha256:b9c8a3839b2754e0fc4309e0f994f617d43814996805388e2f9d977db3fa7967",
+        "length"     => 2739,
+        "repository" => "mssola/lala",
+        "url"        => "https://registry.mssola.cat:5000/v2/mssola/lala/manifests/sha256:b9c8a3839b2754e0fc4309e0f994f617d43814996805388e2f9d977db3fa7967"
+      },
+      "request"   => {
+        "id"        => "e30471d8-39c3-41c0-abc2-775ed43e81c9",
+        "addr"      => "127.0.0.1:54032",
+        "host"      => "registry.mssola.cat:5000",
+        "method"    => "PUT",
+        "useragent" => "docker/1.9.1 go/go1.5.2 git-commit/a34a1d5 kernel/4.4.0-1-default os/linux arch/amd64"
+      },
+      "actor"     => {
+        "name" => "mssola"
+      },
+      "source"    => {
+        "addr"       => "g67:5000",
+        "instanceID" => "18771ece-0887-40f8-ad53-ee46451b4d8b"
+      }
+    }
+  end
+  # rubocop:enable Metrics/LineLength
+
   it "processes all the relevant events" do
     body["events"] << relevant
+    body["events"] << version23
     expect(Repository).to receive(:handle_push_event).with(relevant)
+    expect(Repository).to receive(:handle_push_event).with(version23)
     Portus::RegistryNotification.process!(body, Repository)
   end
 end