fix: handle BigInt status codes in res.status() and res.sendStatus()

Coerce BigInt to Number for compatibility with HTTP status codes.

Fixes: TypeError when passing BigInt (e.g. 200n) to res.status() or
res.sendStatus(), because JSON.stringify() cannot serialize BigInt values.

Now BigInt status codes like 200n are automatically converted to 200
for proper HTTP status handling.

Author: JivinSardine

lib/response.js

@@ -62,6 +62,11 @@ module.exports = res
  */
 
 res.status = function status(code) {
+  // Coerce BigInt to Number for compatibility
+  if (typeof code === 'bigint') {
+    code = Number(code);
+  }
+
   // Check if the status code is not an integer
   if (!Number.isInteger(code)) {
     throw new TypeError(`Invalid status code: ${JSON.stringify(code)}. Status code must be an integer.`);

test/res.sendStatus.js

@@ -40,5 +40,17 @@ describe('res', function () {
         .get('/')
         .expect(500, /TypeError: Invalid status code/, done)
     })
+
+    it('should work with BigInt status code', function (done) {
+      var app = express();
+
+      app.use(function(req, res){
+        res.sendStatus(200n);
+      });
+
+      request(app)
+        .get('/')
+        .expect(200, 'OK', done);
+    })
   })
 })

test/res.status.js

@@ -189,6 +189,18 @@ describe('res', function () {
           .expect(500, /Invalid status code/, done);
       });
 
+      it('should accept BigInt status code', function (done) {
+        var app = express();
+
+        app.use(function (req, res) {
+          res.status(200n).end();
+        });
+
+        request(app)
+          .get('/')
+          .expect(200, done);
+      });
+
       it('should raise error for NaN status code', function (done) {
         var app = express();