[Fetch API] Streaming error should be reported as a TypeError

third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/stream-reader.js

 if (self.importScripts) {
   importScripts('/fetch/resources/fetch-test-helpers.js');
   importScripts('/streams/resources/rs-utils.js');
 }
 
 promise_test(function(t) {
     return fetch('/fetch/resources/doctype.html').then(function(res) {
         var stream = res.body;
         var reader = stream.getReader();
         assert_throws({name: 'TypeError'}, function() { stream.getReader() });
@@ skipping 78 matching lines @@
         res.body.cancel();
         assert_true(res.bodyUsed);
         assert_false(clone.bodyUsed);
         return clone.arrayBuffer();
       }).then(function(r) {
         assert_equals(r.byteLength, 190);
         assert_true(clone.bodyUsed);
       });
   }, 'Cancelling stream should not affect cloned one.');
 
+promise_test(t => {
+    let reader;
+    return fetch('/fetch/resources/slow-failure.cgi').then(res => {
+        reader = res.body.getReader();
+        return readableStreamToArray(res.body, reader);
+      }).then(unreached_fulfillment(t), e => {
+        reader.releaseLock();
+        assert_equals(e.name, 'TypeError');
+      });
+  }, 'Streaming error should be reported as a TypeError.');
+
 done();