1 files changed, 22 insertions, 0 deletions
diff --git a/testing/web-platform/tests/encoding/streams/readable-writable-properties.any.js b/testing/web-platform/tests/encoding/streams/readable-writable-properties.any.js
new file mode 100644
index 0000000000..234649209c
--- /dev/null
+++ b/testing/web-platform/tests/encoding/streams/readable-writable-properties.any.js
@@ -0,0 +1,22 @@
+// META: global=window,worker
+
+// This just tests that the "readable" and "writable" properties pass the brand
+// checks. All other relevant attributes are covered by the IDL tests.
+
+'use strict';
+
+test(() => {
+  const te = new TextEncoderStream();
+  assert_equals(typeof ReadableStream.prototype.getReader.call(te.readable),
+                'object', 'readable property must pass brand check');
+  assert_equals(typeof WritableStream.prototype.getWriter.call(te.writable),
+                'object', 'writable property must pass brand check');
+}, 'TextEncoderStream readable and writable properties must pass brand checks');
+
+test(() => {
+  const td = new TextDecoderStream();
+  assert_equals(typeof ReadableStream.prototype.getReader.call(td.readable),
+                'object', 'readable property must pass brand check');
+  assert_equals(typeof WritableStream.prototype.getWriter.call(td.writable),
+                'object', 'writable property must pass brand check');
+}, 'TextDecoderStream readable and writable properties must pass brand checks');