Leiningen server uses all options in project map

src/ring/server/leiningen.clj

@@ -3,12 +3,18 @@
   (:require [ring.server.standalone :as standalone]))
 
 (defn- load-var [sym]
-  (require (-> sym namespace symbol))
+  (when sym
-  (find-var sym))
+    (require (-> sym namespace symbol))
+    (find-var sym)))
 
 (defn serve
   "Start a server from a Leiningen project map."
   [project]
   (standalone/serve
    (load-var (-> project :ring :handler))
-   {:join? false, :open-browser? false}))
+   (merge
+    {:join? true}
+    (:ring project)
+    (-> project :ring :adapter)
+    {:init    (load-var (-> project :ring :init))
+     :destroy (load-var (-> project :ring :destroy))})))

test/ring/server/test/leiningen.clj

@@ -3,10 +3,12 @@
         ring.server.leiningen
         ring.server.test.utils))
 
-(def project-clj
+(def basic-project-clj
-  `{:ring {:handler default-handler}})
+  `{:ring {:handler default-handler
+           :adapter {:join? false}
+           :open-browser? false}})
 
 (deftest serve-test
   (testing "basic project.clj"
-    (with-server (serve project-clj)
+    (with-server (serve basic-project-clj)
       (is-server-running-on-port 3000))))