Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 319 insertions, 0 deletions

diff --git a/testing/web-platform/tests/streams/transform-streams/reentrant-strategies.any.js b/testing/web-platform/tests/streams/transform-streams/reentrant-strategies.any.js
new file mode 100644
index 0000000000..fc2f918866
--- /dev/null
+++ b/testing/web-platform/tests/streams/transform-streams/reentrant-strategies.any.js
@@ -0,0 +1,319 @@
+// META: global=window,worker
+// META: script=../resources/recording-streams.js
+// META: script=../resources/rs-utils.js
+// META: script=../resources/test-utils.js
+'use strict';
+
+// The size() function of readableStrategy can re-entrantly call back into the TransformStream implementation. This
+// makes it risky to cache state across the call to ReadableStreamDefaultControllerEnqueue. These tests attempt to catch
+// such errors. They are separated from the other strategy tests because no real user code should ever do anything like
+// this.
+//
+// There is no such issue with writableStrategy size() because it is never called from within TransformStream
+// algorithms.
+
+const error1 = new Error('error1');
+error1.name = 'error1';
+
+promise_test(() => {
+  let controller;
+  let calls = 0;
+  const ts = new TransformStream({
+    start(c) {
+      controller = c;
+    }
+  }, undefined, {
+    size() {
+      ++calls;
+      if (calls < 2) {
+        controller.enqueue('b');
+      }
+      return 1;
+    },
+    highWaterMark: Infinity
+  });
+  const writer = ts.writable.getWriter();
+  return Promise.all([writer.write('a'), writer.close()])
+      .then(() => readableStreamToArray(ts.readable))
+      .then(array => assert_array_equals(array, ['b', 'a'], 'array should contain two chunks'));
+}, 'enqueue() inside size() should work');
+
+promise_test(() => {
+  let controller;
+  const ts = new TransformStream({
+    start(c) {
+      controller = c;
+    }
+  }, undefined, {
+    size() {
+      // The readable queue is empty.
+      controller.terminate();
+      // The readable state has gone from "readable" to "closed".
+      return 1;
+      // This chunk will be enqueued, but will be impossible to read because the state is already "closed".
+    },
+    highWaterMark: Infinity
+  });
+  const writer = ts.writable.getWriter();
+  return writer.write('a')
+      .then(() => readableStreamToArray(ts.readable))
+      .then(array => assert_array_equals(array, [], 'array should contain no chunks'));
+  // The chunk 'a' is still in readable's queue. readable is closed so 'a' cannot be read. writable's queue is empty and
+  // it is still writable.
+}, 'terminate() inside size() should work');
+
+promise_test(t => {
+  let controller;
+  const ts = new TransformStream({
+    start(c) {
+      controller = c;
+    }
+  }, undefined, {
+    size() {
+      controller.error(error1);
+      return 1;
+    },
+    highWaterMark: Infinity
+  });
+  const writer = ts.writable.getWriter();
+  return writer.write('a')
+      .then(() => promise_rejects_exactly(t, error1, ts.readable.getReader().read(), 'read() should reject'));
+}, 'error() inside size() should work');
+
+promise_test(() => {
+  let controller;
+  const ts = new TransformStream({
+    start(c) {
+      controller = c;
+    }
+  }, undefined, {
+    size() {
+      assert_equals(controller.desiredSize, 1, 'desiredSize should be 1');
+      return 1;
+    },
+    highWaterMark: 1
+  });
+  const writer = ts.writable.getWriter();
+  return Promise.all([writer.write('a'), writer.close()])
+      .then(() => readableStreamToArray(ts.readable))
+      .then(array => assert_array_equals(array, ['a'], 'array should contain one chunk'));
+}, 'desiredSize inside size() should work');
+
+promise_test(t => {
+  let cancelPromise;
+  const ts = new TransformStream({}, undefined, {
+    size() {
+      cancelPromise = ts.readable.cancel(error1);
+      return 1;
+    },
+    highWaterMark: Infinity
+  });
+  const writer = ts.writable.getWriter();
+  return writer.write('a')
+      .then(() => {
+        promise_rejects_exactly(t, error1, writer.closed, 'writer.closed should reject');
+        return cancelPromise;
+      });
+}, 'readable cancel() inside size() should work');
+
+promise_test(() => {
+  let controller;
+  let pipeToPromise;
+  const ws = recordingWritableStream();
+  const ts = new TransformStream({
+    start(c) {
+      controller = c;
+    }
+  }, undefined, {
+    size() {
+      if (!pipeToPromise) {
+        pipeToPromise = ts.readable.pipeTo(ws);
+      }
+      return 1;
+    },
+    highWaterMark: 1
+  });
+  // Allow promise returned by start() to resolve so that enqueue() will happen synchronously.
+  return delay(0).then(() => {
+    controller.enqueue('a');
+    assert_not_equals(pipeToPromise, undefined);
+
+    // Some pipeTo() implementations need an additional chunk enqueued in order for the first one to be processed. See
+    // https://github.com/whatwg/streams/issues/794 for background.
+    controller.enqueue('a');
+
+    // Give pipeTo() a chance to process the queued chunks.
+    return delay(0);
+  }).then(() => {
+    assert_array_equals(ws.events, ['write', 'a', 'write', 'a'], 'ws should contain two chunks');
+    controller.terminate();
+    return pipeToPromise;
+  }).then(() => {
+    assert_array_equals(ws.events, ['write', 'a', 'write', 'a', 'close'], 'target should have been closed');
+  });
+}, 'pipeTo() inside size() should work');
+
+promise_test(() => {
+  let controller;
+  let readPromise;
+  let calls = 0;
+  let reader;
+  const ts = new TransformStream({
+    start(c) {
+      controller = c;
+    }
+  }, undefined, {
+    size() {
+      // This is triggered by controller.enqueue(). The queue is empty and there are no pending reads. pull() is called
+      // synchronously, allowing transform() to proceed asynchronously. This results in a second call to enqueue(),
+      // which resolves this pending read() without calling size() again.
+      readPromise = reader.read();
+      ++calls;
+      return 1;
+    },
+    highWaterMark: 0
+  });
+  reader = ts.readable.getReader();
+  const writer = ts.writable.getWriter();
+  let writeResolved = false;
+  const writePromise = writer.write('b').then(() => {
+    writeResolved = true;
+  });
+  return flushAsyncEvents().then(() => {
+    assert_false(writeResolved);
+    controller.enqueue('a');
+    assert_equals(calls, 1, 'size() should have been called once');
+    return delay(0);
+  }).then(() => {
+    assert_true(writeResolved);
+    assert_equals(calls, 1, 'size() should only be called once');
+    return readPromise;
+  }).then(({ value, done }) => {
+    assert_false(done, 'done should be false');
+    // See https://github.com/whatwg/streams/issues/794 for why this chunk is not 'a'.
+    assert_equals(value, 'b', 'chunk should have been read');
+    assert_equals(calls, 1, 'calls should still be 1');
+    return writePromise;
+  });
+}, 'read() inside of size() should work');
+
+promise_test(() => {
+  let writer;
+  let writePromise1;
+  let calls = 0;
+  const ts = new TransformStream({}, undefined, {
+    size() {
+      ++calls;
+      if (calls < 2) {
+        writePromise1 = writer.write('a');
+      }
+      return 1;
+    },
+    highWaterMark: Infinity
+  });
+  writer = ts.writable.getWriter();
+  // Give pull() a chance to be called.
+  return delay(0).then(() => {
+    // This write results in a synchronous call to transform(), enqueue(), and size().
+    const writePromise2 = writer.write('b');
+    assert_equals(calls, 1, 'size() should have been called once');
+    return Promise.all([writePromise1, writePromise2, writer.close()]);
+  }).then(() => {
+    assert_equals(calls, 2, 'size() should have been called twice');
+    return readableStreamToArray(ts.readable);
+  }).then(array => {
+    assert_array_equals(array, ['b', 'a'], 'both chunks should have been enqueued');
+    assert_equals(calls, 2, 'calls should still be 2');
+  });
+}, 'writer.write() inside size() should work');
+
+promise_test(() => {
+  let controller;
+  let writer;
+  let writePromise;
+  let calls = 0;
+  const ts = new TransformStream({
+    start(c) {
+      controller = c;
+    }
+  }, undefined, {
+    size() {
+      ++calls;
+      if (calls < 2) {
+        writePromise = writer.write('a');
+      }
+      return 1;
+    },
+    highWaterMark: Infinity
+  });
+  writer = ts.writable.getWriter();
+  // Give pull() a chance to be called.
+  return delay(0).then(() => {
+    // This enqueue results in synchronous calls to size(), write(), transform() and enqueue().
+    controller.enqueue('b');
+    assert_equals(calls, 2, 'size() should have been called twice');
+    return Promise.all([writePromise, writer.close()]);
+  }).then(() => {
+    return readableStreamToArray(ts.readable);
+  }).then(array => {
+    // Because one call to enqueue() is nested inside the other, they finish in the opposite order that they were
+    // called, so the chunks end up reverse order.
+    assert_array_equals(array, ['a', 'b'], 'both chunks should have been enqueued');
+    assert_equals(calls, 2, 'calls should still be 2');
+  });
+}, 'synchronous writer.write() inside size() should work');
+
+promise_test(() => {
+  let writer;
+  let closePromise;
+  let controller;
+  const ts = new TransformStream({
+    start(c) {
+      controller = c;
+    }
+  }, undefined, {
+    size() {
+      closePromise = writer.close();
+      return 1;
+    },
+    highWaterMark: 1
+  });
+  writer = ts.writable.getWriter();
+  const reader = ts.readable.getReader();
+  // Wait for the promise returned by start() to be resolved so that the call to close() will result in a synchronous
+  // call to TransformStreamDefaultSink.
+  return delay(0).then(() => {
+    controller.enqueue('a');
+    return reader.read();
+  }).then(({ value, done }) => {
+    assert_false(done, 'done should be false');
+    assert_equals(value, 'a', 'value should be correct');
+    return reader.read();
+  }).then(({ done }) => {
+    assert_true(done, 'done should be true');
+    return closePromise;
+  });
+}, 'writer.close() inside size() should work');
+
+promise_test(t => {
+  let abortPromise;
+  let controller;
+  const ts = new TransformStream({
+    start(c) {
+      controller = c;
+    }
+  }, undefined, {
+    size() {
+      abortPromise = ts.writable.abort(error1);
+      return 1;
+    },
+    highWaterMark: 1
+  });
+  const reader = ts.readable.getReader();
+  // Wait for the promise returned by start() to be resolved so that the call to abort() will result in a synchronous
+  // call to TransformStreamDefaultSink.
+  return delay(0).then(() => {
+    controller.enqueue('a');
+    return Promise.all([promise_rejects_exactly(t, error1, reader.read(), 'read() should reject'), abortPromise]);
+  });
+}, 'writer.abort() inside size() should work');