Re: [whatwg/streams] Test that TransformStream does not use global constructors (#852)

ricea commented on this pull request.



> +  ReadableStream = function () {
+    throw new Error('Called the global ReadableStream constructor');
+  };
+  WritableStream = function () {
+    throw new Error('Called the global WritableStream constructor');
+  };
+
+  const ts = new TransformStream();
+
+  // Just to be sure, ensure the readable and writable pass brand checks.
+  assert_not_equals(getReader.call(ts.readable), undefined,
+                    'getReader should work when called on ts.readable');
+  assert_not_equals(getWriter.call(ts.writable), undefined,
+                    'getWriter should work when called on ts.writable');
+
+  ReadableStream = oldReadableStream;

That's better, thanks.

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