Testing static routes in compojure

clojure, compojure, testing

Solution

Looking at the source for `not-modified-since?`, I think the issue is you have no headers in your request map, so it throws a NPE on this expr: `(headers "if-modified-since")`. Try changing your `request` method like so:

(defn request [resource web-app & params]
  (web-app {:request-method :get 
            :headers {"content-type" "text/plain"} ; added a header
            :uri resource 
            :params (first params)}))

You might also consider using `ring-mock` to create requests for testing. It insulates you a little bit from stuff like this.

Problem

I am trying to write a test for the compojure static content route. I am testing the routes by examining the ring response directly. A minimal working example is as follows: ``` ;; src/testing-webapps.core.clj (ns testing-webapps.core (:use [compojure.core] [compojure.route :as route])) (defroutes web-app (route/resources "/") (route/not-found "404")) ;; test/testing-webapps.core_test.clj (ns testing-webapps.core-test (:require [clojure.test :refer :all] [testing-webapps.core :refer :all])) (defn request [resource web-app & params] (web-app {:request-method :get :uri resource :params (first params)})) (deftest test-routes (is (= 404 (:status (request "/flubber" web-app)))) (is (= "404" (:body (request "/flubber" web-app)))) (is (= 200 (:status (request "/test.txt" web-app))))) ``` Testing the 404 route works fine but calling `(request "/test.txt" web-app)` leads to an unexpected `NullPointerException` in `ring.middleware.file-info/not-modified-since?`. Here is the top part of the stacktrace: ``` ERROR in (test-routes) (file_info.clj:27) Uncaught exception, not in assertion. expected: nil actual: java.lang.NullPointerException: null at ring.middleware.file_info$not_modified_since_QMARK_.invoke (file_info.clj:27) ring.middleware.file_info$file_info_response.doInvoke (file_info.clj:44) clojure.lang.RestFn.invoke (RestFn.java:442) ring.middleware.file_info$wrap_file_info$fn__917.invoke (file_info.clj:64) [...] ``` The static route works fine in the browser but not when called through my `request` function. Is there an easier way to test a static route in compojure and why do I get a NullPointerException when calling the static route with my own request map?

Original source