diff --git a/src/wanijo/framework/routing.clj b/src/wanijo/framework/routing.clj
index 9af06d3..5c31ee4 100644
--- a/src/wanijo/framework/routing.clj
+++ b/src/wanijo/framework/routing.clj
@@ -30,20 +30,23 @@
            :params params
            :id id}))))))
 
+(defn parse-path [path params]
+  (reduce-kv
+   (fn [new-path param-id param-value]
+     (string/replace
+      new-path
+      (str ":" (name param-id))
+      (str param-value)))
+   path
+   params))
+
 (defn path
   ([id]
    (path id {}))
   ([id params]
    (let [path (id @all-routes)]
      (check-params id path params)
-     (reduce-kv
-      (fn [new-path param-id param-value]
-        (string/replace
-         new-path
-         (str ":" (name param-id))
-         param-value))
-      path
-      params))))
+     (parse-path path params))))
 
 (defn raw-path [id]
   (id @all-routes))
diff --git a/test/wanijo/framework/routing_test.clj b/test/wanijo/framework/routing_test.clj
new file mode 100644
index 0000000..acfc5b3
--- /dev/null
+++ b/test/wanijo/framework/routing_test.clj
@@ -0,0 +1,17 @@
+(ns wanijo.framework.routing-test
+  (:require [clojure.test :refer :all]
+            [wanijo.framework.routing :refer [parse-path]]))
+
+(deftest test-parse-path
+  (testing "no params in path"
+    (is (= (parse-path "a" {}) "a"))
+    (is (= (parse-path "/a/b" {}) "/a/b")))
+  (testing "params are replaced"
+    (is (= (parse-path "/a/:b" {:b 1}) "/a/1"))
+    (is (= (parse-path "/a/:b" {:b "1"}) "/a/1"))
+    (is (= (parse-path ":b" {:b 1}) "1"))
+    (is (= (parse-path "/a/:b/c" {:b 1}) "/a/1/c")))
+  (testing "additional params are ignored"
+    (is (= (parse-path ":a" {:a 1 :b 2}) "1")))
+  (testing "all params are required"
+    (is (thrown? RuntimeException (parse-path ":a")))))