test: update streams WPTs

Author: debadree25

test/fixtures/wpt/README.md

@@ -26,7 +26,7 @@ Last update:
 - performance-timeline: https://github.com/web-platform-tests/wpt/tree/17ebc3aea0/performance-timeline
 - resource-timing: https://github.com/web-platform-tests/wpt/tree/22d38586d0/resource-timing
 - resources: https://github.com/web-platform-tests/wpt/tree/919874f84f/resources
-- streams: https://github.com/web-platform-tests/wpt/tree/51750bc8d7/streams
+- streams: https://github.com/web-platform-tests/wpt/tree/517e945bbf/streams
 - url: https://github.com/web-platform-tests/wpt/tree/84782d9315/url
 - user-timing: https://github.com/web-platform-tests/wpt/tree/5ae85bf826/user-timing
 - wasm/jsapi: https://github.com/web-platform-tests/wpt/tree/cde25e7e3c/wasm/jsapi

test/fixtures/wpt/streams/piping/general-addition.any.js

@@ -0,0 +1,15 @@
+// META: global=window,worker
+'use strict';
+
+promise_test(async t => {
+  /** @type {ReadableStreamDefaultController} */
+  var con;
+  let synchronous = false;
+  new ReadableStream({ start(c) { con = c }}, { highWaterMark: 0 }).pipeTo(
+    new WritableStream({ write() { synchronous = true; } })
+  )
+  // wait until start algorithm finishes
+  await Promise.resolve();
+  con.enqueue();
+  assert_false(synchronous, 'write algorithm must not run synchronously');
+}, "enqueue() must not synchronously call write algorithm");