feat(conditional): Allow additional arguments to be used (#56)

.travis.yml

@@ -7,14 +7,12 @@ notifications:
   email: false
 node_js:
   - '6'
-before_install:
-  - npm i -g npm@^2.0.0
-before_script:
-  - npm prune
-script: npm run lint && npm t
+script:
+  - yarn lint
+  - yarn test
 after_success:
-  - npm run coveralls
-  - npm run semantic-release
+  - yarn coveralls
+  - yarn semantic-release
 branches:
   except:
     - /^v\d+\.\d+\.\d+$/

lib/conditional.js

@@ -31,15 +31,14 @@ const once = require('once');
  *     }
  *  ));
  */
-module.exports = (condition, success, fail) => (req, res, next) => {
+module.exports = (condition, success, fail) => (req, res, next, ...rest) => {
   const nextOnce = once(next);
   if (condition === true || (typeof condition === 'function' && condition(req, res, nextOnce))) {
-    return success(req, res, nextOnce);
+    return success(req, res, nextOnce, ...rest);
   }
   if (fail) {
-    return fail(req, res, nextOnce);
+    return fail(req, res, nextOnce, ...rest);
   }
 
   return nextOnce();
 };
-

test/index.js

@@ -34,6 +34,18 @@ module.exports = {
     });
   },
 
+  boolAdditional(test) {
+    test.expect(2);
+    const middleware = conditional(true, (req, res, next, extra) => {
+      test.ok(true, 'true conditional worked.');
+      test.equal(extra, 'extra received');
+      next();
+    });
+    middleware({}, {}, () => {
+      test.done();
+    }, 'extra received');
+  },
+
   func(test) {
     test.expect(3);
 
@@ -82,4 +94,3 @@ module.exports = {
     });
   },
 };
-