test: improve lib/internal/webstreams/readablestream.js coverage

PR-URL: #42823
Refs: https://coverage.nodejs.org/coverage-3a6b975981092213/lib/internal/webstreams/readablestream.js.html#L421
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>

Author: fossamagna

test/parallel/test-whatwg-readablebytestream.js

@@ -65,6 +65,9 @@ const {
 defaultReader.releaseLock();
 constbyobReader=r.getReader({mode: 'byob'});
 assert(byobReaderinstanceofReadableStreamBYOBReader);
+assert.match(
+inspect(byobReader,{depth: 0}),
+/ReadableStreamBYOBReader/);
 }
 
 classSource{
@@ -233,6 +236,19 @@ class Source {
 });
 }
 
+{
+letcontroller;
+newReadableStream({
+type: 'bytes',
+start(c){controller=c;}
+});
+controller.enqueue(newUint8Array(10));
+controller.close();
+assert.throws(()=>controller.enqueue(newUint8Array(10)),{
+code: 'ERR_INVALID_STATE',
+});
+}
+
 {
 conststream=newReadableStream({
 type: 'bytes',

test/parallel/test-whatwg-readablestream.js

@@ -32,6 +32,7 @@ const {
  readableStreamDefaultControllerCanCloseOrEnqueue,
  readableByteStreamControllerClose,
  readableByteStreamControllerRespond,
+ readableStreamReaderGenericRelease,
 }=require('internal/webstreams/readablestream');
 
 const{
@@ -371,6 +372,24 @@ assert.throws(() => {
 });
 }
 
+{
+conststream=newReadableStream();
+constiterable=stream.values();
+readableStreamReaderGenericRelease(stream[kState].reader);
+assert.rejects(iterable.next(),{
+code: 'ERR_INVALID_STATE',
+}).then(common.mustCall());
+}
+
+{
+conststream=newReadableStream();
+constiterable=stream.values();
+readableStreamReaderGenericRelease(stream[kState].reader);
+assert.rejects(iterable.return(),{
+code: 'ERR_INVALID_STATE',
+}).then(common.mustCall());
+}
+
 {
 conststream=newReadableStream({
 start(controller){
@@ -1357,6 +1376,9 @@ class Source {
 assert.throws(()=>ReadableStream.prototype.tee.call({}),{
 code: 'ERR_INVALID_THIS',
 });
+assert.throws(()=>ReadableStream.prototype.values.call({}),{
+code: 'ERR_INVALID_THIS',
+});
 assert.throws(()=>ReadableStream.prototype[kTransfer].call({}),{
 code: 'ERR_INVALID_THIS',
 });