nodejs-github-bot · Aug 31, 2026 · Aug 29, 2026 · Aug 29, 2026
diff --git a/test/fixtures/wpt/streams/WEB_FEATURES.yml b/test/fixtures/wpt/streams/WEB_FEATURES.yml
@@ -1,5 +1,3 @@
-features:
-- name: streams
-  files:
-    # Top-level only. Subdirectories have their own mapping.
-    - "*"
+rules:
+# Top-level only. Subdirectories have their own mapping.
+- "*": [streams]
diff --git a/test/fixtures/wpt/streams/idlharness.any.js b/test/fixtures/wpt/streams/idlharness.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm-in-window
+// META: global=window,worker
 // META: script=/resources/WebIDLParser.js
 // META: script=/resources/idlharness.js
 // META: timeout=long

diff --git a/test/fixtures/wpt/streams/piping/WEB_FEATURES.yml b/test/fixtures/wpt/streams/piping/WEB_FEATURES.yml
@@ -1,3 +1,2 @@
-features:
-- name: streams
-  files: "**"
+rules:
+- "**": [streams]
diff --git a/test/fixtures/wpt/streams/piping/abort.any.js b/test/fixtures/wpt/streams/piping/abort.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/recording-streams.js
 // META: script=../resources/test-utils.js
 'use strict';

diff --git a/test/fixtures/wpt/streams/piping/close-propagation-backward.any.js b/test/fixtures/wpt/streams/piping/close-propagation-backward.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/recording-streams.js
 'use strict';
 

diff --git a/test/fixtures/wpt/streams/piping/close-propagation-forward.any.js b/test/fixtures/wpt/streams/piping/close-propagation-forward.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 // META: script=../resources/recording-streams.js
 'use strict';

diff --git a/test/fixtures/wpt/streams/piping/error-propagation-backward.any.js b/test/fixtures/wpt/streams/piping/error-propagation-backward.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 // META: script=../resources/recording-streams.js
 'use strict';

diff --git a/test/fixtures/wpt/streams/piping/error-propagation-forward.any.js b/test/fixtures/wpt/streams/piping/error-propagation-forward.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 // META: script=../resources/recording-streams.js
 'use strict';

diff --git a/test/fixtures/wpt/streams/piping/flow-control.any.js b/test/fixtures/wpt/streams/piping/flow-control.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 // META: script=../resources/rs-utils.js
 // META: script=../resources/recording-streams.js

diff --git a/test/fixtures/wpt/streams/piping/general-addition.any.js b/test/fixtures/wpt/streams/piping/general-addition.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 'use strict';
 
 promise_test(async t => {

diff --git a/test/fixtures/wpt/streams/piping/general.any.js b/test/fixtures/wpt/streams/piping/general.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/recording-streams.js
 'use strict';
 

diff --git a/test/fixtures/wpt/streams/piping/multiple-propagation.any.js b/test/fixtures/wpt/streams/piping/multiple-propagation.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 // META: script=../resources/recording-streams.js
 'use strict';

diff --git a/test/fixtures/wpt/streams/piping/pipe-through.any.js b/test/fixtures/wpt/streams/piping/pipe-through.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/rs-utils.js
 // META: script=../resources/test-utils.js
 // META: script=../resources/recording-streams.js

diff --git a/test/fixtures/wpt/streams/piping/then-interception.any.js b/test/fixtures/wpt/streams/piping/then-interception.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 // META: script=../resources/recording-streams.js
 'use strict';

diff --git a/test/fixtures/wpt/streams/piping/throwing-options.any.js b/test/fixtures/wpt/streams/piping/throwing-options.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 'use strict';
 
 class ThrowingOptions {

diff --git a/test/fixtures/wpt/streams/piping/transform-streams.any.js b/test/fixtures/wpt/streams/piping/transform-streams.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 'use strict';
 
 promise_test(() => {

diff --git a/test/fixtures/wpt/streams/queuing-strategies.any.js b/test/fixtures/wpt/streams/queuing-strategies.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 'use strict';
 
 const highWaterMarkConversions = new Map([

diff --git a/test/fixtures/wpt/streams/readable-byte-streams/WEB_FEATURES.yml b/test/fixtures/wpt/streams/readable-byte-streams/WEB_FEATURES.yml
@@ -1,3 +1,2 @@
-features:
-- name: readable-byte-streams
-  files: "**"
+rules:
+- "**": [readable-byte-streams]
diff --git a/test/fixtures/wpt/streams/readable-byte-streams/bad-buffers-and-views.any.js b/test/fixtures/wpt/streams/readable-byte-streams/bad-buffers-and-views.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 'use strict';
 
 promise_test(() => {

diff --git a/test/fixtures/wpt/streams/readable-byte-streams/construct-byob-request.any.js b/test/fixtures/wpt/streams/readable-byte-streams/construct-byob-request.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/rs-utils.js
 'use strict';
 

diff --git a/test/fixtures/wpt/streams/readable-byte-streams/enqueue-with-detached-buffer.any.js b/test/fixtures/wpt/streams/readable-byte-streams/enqueue-with-detached-buffer.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 
 promise_test(async t => {
   const error = new Error('cannot proceed');

diff --git a/test/fixtures/wpt/streams/readable-byte-streams/general.any.js b/test/fixtures/wpt/streams/readable-byte-streams/general.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/rs-utils.js
 // META: script=../resources/test-utils.js
 'use strict';

diff --git a/test/fixtures/wpt/streams/readable-byte-streams/non-transferable-buffers.any.js b/test/fixtures/wpt/streams/readable-byte-streams/non-transferable-buffers.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 'use strict';
 
 promise_test(async t => {

diff --git a/test/fixtures/wpt/streams/readable-byte-streams/patched-global.any.js b/test/fixtures/wpt/streams/readable-byte-streams/patched-global.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 'use strict';
 

diff --git a/test/fixtures/wpt/streams/readable-byte-streams/read-min.any.js b/test/fixtures/wpt/streams/readable-byte-streams/read-min.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/rs-utils.js
 // META: script=../resources/test-utils.js
 'use strict';

diff --git a/test/fixtures/wpt/streams/readable-byte-streams/respond-after-enqueue.any.js b/test/fixtures/wpt/streams/readable-byte-streams/respond-after-enqueue.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 
 'use strict';
 

diff --git a/test/fixtures/wpt/streams/readable-byte-streams/tee.any.js b/test/fixtures/wpt/streams/readable-byte-streams/tee.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/rs-utils.js
 // META: script=../resources/test-utils.js
 // META: script=../resources/recording-streams.js
@@ -351,6 +351,39 @@ promise_test(async () => {
 
 }, 'ReadableStream teeing with byte source: canceling branch1 should finish when branch2 reads until end of stream');
 
+promise_test(async () => {
+
+  let controller;
+  const rs = new ReadableStream({
+    type: 'bytes',
+    start(c) {
+      controller = c;
+    }
+  });
+
+  const [branch1, branch2] = rs.tee();
+  const reader1 = branch1.getReader({ mode: 'byob' });
+  const reader2 = branch2.getReader({ mode: 'byob' });
+  const cancelPromise = reader1.cancel();
+
+  controller.enqueue(new Uint8Array([0x01]));
+
+  const read2 = await reader2.read(new Uint8Array(1));
+  assert_equals(read2.done, false, 'first read() from branch2 should not be done');
+  assert_typed_array_equals(read2.value, new Uint8Array([0x01]), 'first read() from branch2');
+
+  controller.close();
+
+  const read2b = await reader2.read(new Uint8Array(1));
+  assert_equals(read2b.done, true, 'second read() from branch2 should be done');
+
+  await Promise.all([
+    reader2.closed,
+    cancelPromise
+  ]);
+
+}, 'ReadableStream teeing with byte source: canceling branch1 should finish when branch2 reads with a BYOB reader until end of stream');
+
 promise_test(async t => {
 
   let controller;

diff --git a/test/fixtures/wpt/streams/readable-byte-streams/templated.any.js b/test/fixtures/wpt/streams/readable-byte-streams/templated.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 // META: script=../resources/rs-test-templates.js
 'use strict';

diff --git a/test/fixtures/wpt/streams/readable-streams/WEB_FEATURES.yml b/test/fixtures/wpt/streams/readable-streams/WEB_FEATURES.yml
@@ -1,14 +1,6 @@
-features:
-- name: streams
-  files:
-    - "*"
-    - "!async-iterator.any.js"
-    - "!from.any.js"
-    # 'owning' type is not yet standardized
-    - "!owning-type*"
-- name: async-iterable-streams
-  files:
-    - async-iterator.any.js
-- name: readablestream-from
-  files:
-    - from.any.js
+rules:
+- async-iterator.any.js: [async-iterable-streams]
+- from.any.js: [readablestream-from]
+# 'owning' type is not yet standardized
+- owning-type*: []
+- "*": [streams]
diff --git a/test/fixtures/wpt/streams/readable-streams/async-iterator.any.js b/test/fixtures/wpt/streams/readable-streams/async-iterator.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/rs-utils.js
 // META: script=../resources/test-utils.js
 // META: script=../resources/recording-streams.js

diff --git a/test/fixtures/wpt/streams/readable-streams/bad-strategies.any.js b/test/fixtures/wpt/streams/readable-streams/bad-strategies.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 'use strict';
 
 test(() => {

diff --git a/test/fixtures/wpt/streams/readable-streams/bad-underlying-sources.any.js b/test/fixtures/wpt/streams/readable-streams/bad-underlying-sources.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 'use strict';
 
 

diff --git a/test/fixtures/wpt/streams/readable-streams/cancel.any.js b/test/fixtures/wpt/streams/readable-streams/cancel.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 // META: script=../resources/rs-utils.js
 'use strict';

diff --git a/test/fixtures/wpt/streams/readable-streams/constructor.any.js b/test/fixtures/wpt/streams/readable-streams/constructor.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 'use strict';
 
 const error1 = new Error('error1');

diff --git a/test/fixtures/wpt/streams/readable-streams/count-queuing-strategy-integration.any.js b/test/fixtures/wpt/streams/readable-streams/count-queuing-strategy-integration.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 'use strict';
 
 test(() => {

diff --git a/test/fixtures/wpt/streams/readable-streams/crashtests/WEB_FEATURES.yml b/test/fixtures/wpt/streams/readable-streams/crashtests/WEB_FEATURES.yml
@@ -1,7 +1,3 @@
-features:
-- name: streams
-  files:
-    - strategy-worker-terminate.html
-- name: readablestream-from
-  files:
-    - from-cross-realm.https.html
+rules:
+- strategy-worker-terminate.html: [streams]
+- from-cross-realm.https.html: [readablestream-from]
diff --git a/test/fixtures/wpt/streams/readable-streams/default-reader.any.js b/test/fixtures/wpt/streams/readable-streams/default-reader.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/rs-utils.js
 'use strict';
 

diff --git a/test/fixtures/wpt/streams/readable-streams/floating-point-total-queue-size.any.js b/test/fixtures/wpt/streams/readable-streams/floating-point-total-queue-size.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 'use strict';
 
 // Due to the limitations of floating-point precision, the calculation of desiredSize sometimes gives different answers

diff --git a/test/fixtures/wpt/streams/readable-streams/from.any.js b/test/fixtures/wpt/streams/readable-streams/from.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 'use strict';
 
@@ -18,11 +18,6 @@ const iterableFactories = [
     return ['a', 'b'][Symbol.iterator]();
   }],
 
-  ['a string', () => {
-    // This iterates over the code points of the string.
-    return 'ab';
-  }],
-
   ['a Set', () => {
     return new Set(['a', 'b']);
   }],
@@ -81,6 +76,19 @@ const iterableFactories = [
     return iterable;
   }],
 
+  ['a sync iterable with a function iterator', () => {
+    const chunks = ['a', 'b'];
+    function functionIterator() {}
+    functionIterator.next = () => ({
+      done: chunks.length === 0,
+      value: chunks.shift()
+    });
+    const iterable = {
+      [Symbol.iterator]: () => functionIterator
+    };
+    return iterable;
+  }],
+
   ['an async iterable', () => {
     const chunks = ['a', 'b'];
     const asyncIterator = {
@@ -97,6 +105,19 @@ const iterableFactories = [
     return asyncIterable;
   }],
 
+  ['an async iterable with a function iterator', () => {
+    const chunks = ['a', 'b'];
+    function functionAsyncIterator() {}
+    functionAsyncIterator.next = () => Promise.resolve({
+      done: chunks.length === 0,
+      value: chunks.shift()
+    });
+    const asyncIterable = {
+      [Symbol.asyncIterator]: () => functionAsyncIterator
+    };
+    return asyncIterable;
+  }],
+
   ['a ReadableStream', () => {
     return new ReadableStream({
       start(c) {
@@ -144,6 +165,7 @@ const badIterables = [
   ['Object.create(null)', Object.create(null)],
   ['a function', () => 42],
   ['a symbol', Symbol()],
+  ['a string', 'ab'],
   ['an object with a non-callable @@iterator method', {
     [Symbol.iterator]: 42
   }],

diff --git a/test/fixtures/wpt/streams/readable-streams/garbage-collection.any.js b/test/fixtures/wpt/streams/readable-streams/garbage-collection.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 // META: script=/common/gc.js
 'use strict';

diff --git a/test/fixtures/wpt/streams/readable-streams/general.any.js b/test/fixtures/wpt/streams/readable-streams/general.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 // META: script=../resources/rs-utils.js
 'use strict';

diff --git a/...e-streams/owning-type-message-port.any.js → ...owning-type-message-port.tentative.any.js b/...e-streams/owning-type-message-port.any.js → ...owning-type-message-port.tentative.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 // META: script=../resources/rs-utils.js
 'use strict';

diff --git a/...le-streams/owning-type-video-frame.any.js → .../owning-type-video-frame.tentative.any.js b/...le-streams/owning-type-video-frame.any.js → .../owning-type-video-frame.tentative.any.js
diff --git a/...reams/readable-streams/owning-type.any.js → ...able-streams/owning-type.tentative.any.js b/...reams/readable-streams/owning-type.any.js → ...able-streams/owning-type.tentative.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/test-utils.js
 // META: script=../resources/rs-utils.js
 'use strict';

diff --git a/test/fixtures/wpt/streams/readable-streams/patched-global.any.js b/test/fixtures/wpt/streams/readable-streams/patched-global.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 'use strict';
 
 // Tests which patch the global environment are kept separate to avoid

diff --git a/test/fixtures/wpt/streams/readable-streams/reentrant-strategies.any.js b/test/fixtures/wpt/streams/readable-streams/reentrant-strategies.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/recording-streams.js
 // META: script=../resources/rs-utils.js
 // META: script=../resources/test-utils.js

diff --git a/test/fixtures/wpt/streams/readable-streams/tee.any.js b/test/fixtures/wpt/streams/readable-streams/tee.any.js
@@ -1,4 +1,4 @@
-// META: global=window,worker,shadowrealm
+// META: global=window,worker
 // META: script=../resources/rs-utils.js
 // META: script=../resources/test-utils.js
 // META: script=../resources/recording-streams.js