Import wpt@503f5b5f78ec4e87d144f78609f363f0ed0ea8db

third_party/WebKit/LayoutTests/external/wpt/streams/writable-streams/general.js

 'use strict';
 
 if (self.importScripts) {
   self.importScripts('/resources/testharness.js');
 }
 
 test(() => {
   const ws = new WritableStream({});
   const writer = ws.getWriter();
   writer.releaseLock();
@@ skipping 15 matching lines @@
   const writer = ws.getWriter();
 
   writer.close();
 
   return writer.closed.then(() => {
     assert_equals(writer.desiredSize, 0, 'desiredSize should be 0');
   });
 }, 'desiredSize on a writer for a closed stream');
 
 test(() => {
+  const ws = new WritableStream({
+    start(c) {
+      c.error();
+    }
+  });
+
+  const writer = ws.getWriter();
+  assert_equals(writer.desiredSize, null, 'desiredSize should be null');
+}, 'desiredSize on a writer for an errored stream');
+
+test(() => {
   const ws = new WritableStream({});
 
   const writer = ws.getWriter();
   writer.close();
   writer.releaseLock();
 
   ws.getWriter();
 }, 'ws.getWriter() on a closing WritableStream');
 
 promise_test(() => {
@@ skipping 163 matching lines @@
   const writer1 = ws.getWriter();
   assert_equals(undefined, writer1.releaseLock(), 'releaseLock() should return undefined');
   const writer2 = ws.getWriter();
   assert_equals(undefined, writer1.releaseLock(), 'no-op releaseLock() should return undefined');
   // Calling releaseLock() on writer1 should not interfere with writer2. If it did, then the ready promise would be
   // rejected.
   return writer2.ready;
 }, 'redundant releaseLock() is no-op');
 
 done();