test: fix change stream expectations for mongodb-latest

Author: mbroadst

test/functional/change_stream_tests.js

@@ -423,26 +423,17 @@ describe('Change Streams', function() {
             theDatabase
               .collection('resumetokenProjectedOutCallback')
               .insert({ b: 2 }, function(err, result) {
-                assert.ifError(err);
-                assert.equal(result.insertedCount, 1);
+                expect(err).to.not.exist;
+                expect(result.insertedCount).to.equal(1);
               });
-          });
+          }, 250);
 
           // Fetch the change notification
-          thisChangeStream.hasNext(function(err, hasNext) {
-            assert.ifError(err);
-            assert.equal(true, hasNext);
+          thisChangeStream.next(function(err) {
+            expect(err).to.exist;
 
-            thisChangeStream.next(function(err) {
-              assert.ok(err);
-              assert.equal(
-                err.message,
-                'A change stream document has been received that lacks a resume token (_id).'
-              );
-
-              // Close the change stream
-              thisChangeStream.close().then(() => client.close(done));
-            });
+            // Close the change stream
+            thisChangeStream.close().then(() => client.close(done));
           });
         });
       }
@@ -471,11 +462,7 @@ describe('Change Streams', function() {
         });
 
         thisChangeStream.on('error', function(err) {
-          assert.equal(
-            err.message,
-            'A change stream document has been received that lacks a resume token (_id).'
-          );
-
+          expect(err).to.exist;
           thisChangeStream.close(() => client.close(done));
         });