Add simple test for conf.d

tests/emgauwa-core-testing.conf

@@ -1,10 +1,9 @@
 [core]
 database = "emgauwa-core.sqlite"
+include = "../emgauwa-core-testing.conf.d"
 content-dir = "."
 not-found-file = "404.html"
 not-found-file-mime = "text/html"
-not-found-content = "404 - NOT FOUND"
-not-found-content-type = "text/plain"
 
 [ports]
 server = 5000

tests/emgauwa-core-testing.conf.d/conf_d_working.conf

@@ -0,0 +1,3 @@
+[core]
+not-found-content = '{"msg": "conf.d working"}'
+not-found-content-type = "application/json"

tests/tavern_tests/0.1.test_basics.tavern.yaml

@@ -14,3 +14,12 @@ stages:
     method: GET
   response:
     status_code: 404
+
+- name: "[test_basics] verify conf.d by 404"
+  request:
+    url: "http://localhost:5000/invalid_url_for_testing_do_not_use"
+    method: GET
+  response:
+    status_code: 404
+    json:
+        msg: "conf.d working"