test: add size checks

Author: nbbeeken

test/unit/cmap/connection.test.ts

@@ -342,6 +342,7 @@ describe('new Connection()', function () {
 
       let dataCount = 0;
       stream.on('data', () => {
+        expect(chunk).to.have.lengthOf(8);
         dataCount += 1;
       });
 
@@ -361,7 +362,8 @@ describe('new Connection()', function () {
       const stream = new SizedMessageTransform({ connection: {} as any });
 
       let dataCount = 0;
-      stream.on('data', () => {
+      stream.on('data', chunk => {
+        expect(chunk).to.have.lengthOf(8);
         dataCount += 1;
       });