Simple Midje tests for server db code

project.clj

@@ -13,6 +13,7 @@
                  [prismatic/dommy "0.1.1"]
                  [core.async "0.1.0-SNAPSHOT"]
                  [com.novemberain/monger "1.5.0"]]
+  :profiles {:dev {:dependencies [[midje "1.5.1"]]}}
   :plugins [[lein-cljsbuild "0.3.2"]
             [lein-ring "0.8.6"]]
   :cljsbuild {

src-clj/grub/core.clj

@@ -36,4 +36,5 @@
       (handler/site routes))))
 
 (defn -main [& args]
+  (db/connect-and-handle-events)
   (httpkit/run-server app {:port 3000}))

src-clj/grub/db.clj

@@ -7,10 +7,7 @@
 
 (def grub-collection "grubs")
 
-(def incoming-events (chan))
-
-(defn get-incoming-events []
-  incoming-events)
+(def incoming-events (atom nil))
 
 (defmulti handle-event :event :default :unknown-event)
 
@@ -18,7 +15,7 @@
   (let [grub (-> event
                  (select-keys [:_id :grub])
                  (assoc :completed false))]
-    (mc/insert grub-collection grub)))
+    (when (and (:_id grub) (:grub grub)) (mc/insert grub-collection grub))))
 
 (defmethod handle-event :complete [event]
   (mc/update grub-collection 
@@ -36,16 +33,15 @@
 (defmethod handle-event :unknown-event [event]
   (println "Cannot handle unknown event:" event))
 
-(defn handle-incoming-events []
-  (go-loop (let [event (<! (get-incoming-events))]
-             (println "DB handling" event)
+(defn handle-incoming-events! []
+  (reset! incoming-events (chan))
+  (go-loop (let [event (<! @incoming-events)]
              (handle-event event))))
 
 (defn get-current-grubs-as-events []
   (let [grubs (mc/find-maps grub-collection)
         sorted-grubs (sort-by :_id (vec grubs))
         out (chan)]
-    (println "sorted-grubs:" sorted-grubs)
     (go (doseq [grub sorted-grubs]
           (let [grub-event (-> grub
                                (select-keys [:_id :grub :completed])
@@ -53,10 +49,11 @@
             (>! out grub-event))))
     out))
 
-(defn connect-to-db []
-  (println "Connect to db")
-  (m/connect!)
-  (m/set-db! (m/get-db "monger-test")))
+(def default-db "grub")
 
-(connect-to-db)
-(handle-incoming-events)
+(defn connect-and-handle-events
+  ([] (connect-and-handle-events default-db))
+  ([db-name]
+     (handle-incoming-events!)
+     (m/connect!)
+     (m/set-db! (m/get-db db-name))))

test/grub/core_test.clj

@@ -1,7 +1,3 @@
 (ns grub.core-test
   (:use clojure.test
         grub.core))
-
-(deftest a-test
-  (testing "FIXME, I fail."
-    (is (= 0 1))))

test/grub/db_test.clj

@@ -0,0 +1,26 @@
+(ns grub.db-test
+  (:require [midje.sweet :refer [fact with-state-changes contains anything]]
+            [monger.collection :as mc]
+            [grub.db :as db]
+            [clojure.core.async :refer [>!!]]))
+
+(def test-db "grub-test")
+
+(with-state-changes [(before :facts (do (mc/drop db/grub-collection)
+                                        (db/connect-and-handle-events test-db)))]
+  (fact 
+   "Add grub"
+   (fact "sending an event creates a grub"
+         (let [test-grub "testgrub"
+               test-id 12345]
+           (>!! @db/incoming-events {:event :create :_id test-id :grub test-grub})
+           (mc/find-one-as-map db/grub-collection {:_id test-id}) => 
+           {:_id test-id :grub test-grub :completed false}))
+   (fact "missing an id means grub is not created"
+         (>!! @db/incoming-events {:event :create :grub "testgrub"})
+         (mc/find-maps db/grub-collection) => 
+         empty?)
+   (fact "missing grub text means grub is not created"
+         (>!! @db/incoming-events {:event :create :_id 12345})
+         (mc/find-maps db/grub-collection) => 
+         empty?)))