diff --git a/project.clj b/project.clj
index 7c18f46..2d3fa96 100644
--- a/project.clj
+++ b/project.clj
@@ -3,4 +3,6 @@
   :url "http://example.com/FIXME"
   :license {:name "Eclipse Public License"
             :url "http://www.eclipse.org/legal/epl-v10.html"}
-  :dependencies [[org.clojure/clojure "1.6.0"]])
+  :dependencies [[org.clojure/clojure "1.6.0"]
+                 [http-kit "2.1.18"]
+                 [cheshire "5.3.1"]])
diff --git a/src/clj_slack/core.clj b/src/clj_slack/core.clj
index c900887..7c11b73 100644
--- a/src/clj_slack/core.clj
+++ b/src/clj_slack/core.clj
@@ -1,6 +1,17 @@
-(ns clj-slack.core)
+(ns clj-slack.core
+  (:use [cheshire.core])
+  (:require [org.httpkit.client :as http]))
 
-(defn foo
-  "I don't do a whole lot."
-  [x]
-  (println x "Hello, World!"))
+(defn remove-nil [& params]
+  (let [map (apply hash-map params)]
+    (into {} (filter second map))))
+
+(defn create-link
+  [link text]
+  (format "<%s|%s>" link text))
+
+(defn send-msg [url text & {:keys [username icon_url icon_emoji]}]
+  (let [map (remove-nil :text text :username username :icon_url icon_url :icon_emoji icon_emoji)]
+    (let [options {:timeout 15000
+                   :body (generate-string map)}]
+      (= (:status @(http/post url options)) 200))))
diff --git a/test/clj_slack/core_test.clj b/test/clj_slack/core_test.clj
index 1ec7048..d9b27e6 100644
--- a/test/clj_slack/core_test.clj
+++ b/test/clj_slack/core_test.clj
@@ -2,6 +2,10 @@
   (:require [clojure.test :refer :all]
             [clj-slack.core :refer :all]))
 
-(deftest a-test
-  (testing "FIXME, I fail."
-    (is (= 0 1))))
+(def slackUrl "")
+
+(deftest send-msg-test
+  (testing "send-msg"
+    (let [text (str "There's sth new!\n" (create-link "http://www.baidu.com" "Click here!"))
+          res (send-msg slackUrl text :username "lzwjava" :icon_emoji ":ghost:")]
+      (is res true))))