test-tee-trace.js - mozsearch

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// Test that ReadableStreamDefaultTeeReadRequest::ChunkSteps is traced correctly

// during GC. This validates that microtasks holding onto JS values are properly

// traced when many other microtasks are queued.

function gc() {

  Cu.forceShrinkingGC();

  Cu.forceCC();

  Cu.forceGC();

add_task(async function test_tee_trace() {

  let controller;

  const stream = new ReadableStream({

    start(c) {

      controller = c;

},

});

  const [branch1] = stream.tee();

  const reader = branch1.getReader();

  const readPromise = reader.read();

  for (let i = 0; i < 10; i++) {

    controller.enqueue(`test data ${i}`);

  await readPromise;

  gc();

  // Clean up

  reader.releaseLock();

  gc();

  await controller.close();

});