test fix

Author: baileympearson

test/integration/node-specific/bson-options/utf8_validation.test.ts

@@ -160,7 +160,7 @@ describe('class MongoDBResponse', () => {
   );
 });
 
-describe.only('utf8 validation with cursors', function () {
+describe('utf8 validation with cursors', function () {
   let client: MongoClient;
   let collection: Collection;
 
@@ -173,8 +173,12 @@ describe.only('utf8 validation with cursors', function () {
     await collection.deleteMany({});
 
     const stub = sinon.stub(net.Socket.prototype, 'write').callsFake(function (...args) {
-      if (args[0].toString('hex').includes('c3a9')) {
-        const buffer = Buffer.from(args[0].toString('hex').replace('c3a9', 'c301'), 'hex');
+      const providedBuffer = args[0].toString('hex');
+      if (providedBuffer.includes('c3a9')) {
+        if (providedBuffer.split('c3a9').length !== 2) {
+          throw new Error('received buffer more than one `c3a9` sequences.  or perhaps none?');
+        }
+        const buffer = Buffer.from(providedBuffer.replace('c3a9', 'c301'), 'hex');
         const result = stub.wrappedMethod.apply(this, [buffer]);
         sinon.restore();
         return result;