chore: comments

Author: durran

src/mongo_client.ts

@@ -493,7 +493,7 @@ export class MongoClient extends TypedEventEmitter<MongoClientEvents> implements
    */
   appendMetadata(driverInfo: DriverInfo) {
     for (const info of this.options.additionalDriverInfo) {
-      if (info.name === driverInfo.name) {
+      if (info.name === driverInfo.name && info.version === driverInfo.version) {
         return;
       }
     }

test/integration/mongodb-handshake/mongodb-handshake.prose.test.ts

@@ -356,12 +356,18 @@ describe('Client Metadata Update Prose Tests', function () {
           expect(updatedClientMetadata.os).to.deep.equal(initialClientMetadata.os);
         });
 
-        it('does not append duplicate metadata for the same name', async function () {
+        it('does not append duplicate metadata for the same name and version', async function () {
           client.appendMetadata({ name, version, platform });
           client.appendMetadata({ name, version, platform });
           await client.db('test').command({ ping: 1 });
           expect(updatedClientMetadata.driver.name).to.not.contain('|framework|framework');
         });
+
+        it('appends metadata when the version differs', async function () {
+          client.appendMetadata({ name, version: '0.0', platform });
+          await client.db('test').command({ ping: 1 });
+          expect(updatedClientMetadata.driver.name).to.not.contain('0.0');
+        });
       });
     }
   });