implemented code coverage

src/test/helper.ts

@@ -39,6 +39,10 @@ export default class TestHelper {
     server.close(done);
   }
 
+  static after(done) {
+    db.disconnect(done);
+  }
+
   static request (server, done, options) {  // options in form: {method, url, auth: {key/basic: 'name' or 'key'/{name, pass}}, httpStatus, req, res}
     let st = supertest(server);
     if (options.hasOwnProperty('auth') && options.auth.hasOwnProperty('key')) {  // resolve API key
@@ -58,6 +62,9 @@ export default class TestHelper {
         st = st.delete(options.url)
         break;
     }
+    if (options.hasOwnProperty('reqType')) {  // request body
+      st = st.type(options.reqType);
+    }
     if (options.hasOwnProperty('req')) {  // request body
       st = st.send(options.req);
     }