Function main

test/parallel/test-performance-resourcetimingbuffersize.js:32–88

()

const cacheMode = '';

async function main() {
  const args = [
    timingInfo,
    requestedUrl,
    initiatorType,
    globalThis,
    cacheMode,
  ];

  assert.throws(() => performance.setResourceTimingBufferSize(1n), {
    name: 'TypeError',
    code: 'ERR_INVALID_ARG_TYPE',
    message: 'maxSize is a BigInt and cannot be converted to a number.',
  });

  assert.throws(() => performance.setResourceTimingBufferSize(Symbol()), {
    name: 'TypeError',
    code: 'ERR_INVALID_ARG_TYPE',
    message: 'maxSize is a Symbol and cannot be converted to a number.',
  });

  // Invalid buffer size values are converted to 0.
  const invalidValues = [ null, undefined, true, false, -1, 0.5, Infinity, NaN, '', 'foo', {}, [], () => {} ];
  for (const value of invalidValues) {
    performance.setResourceTimingBufferSize(value);
    performance.markResourceTiming(...args);
    assert.strictEqual(performance.getEntriesByType('resource').length, 0);
    performance.clearResourceTimings();
  }
  // Wait for the buffer full event to be cleared.
  await waitBufferFullEvent();

  performance.setResourceTimingBufferSize(1);
  performance.markResourceTiming(...args);
  // Trigger a resourcetimingbufferfull event.
  performance.markResourceTiming(...args);
  assert.strictEqual(performance.getEntriesByType('resource').length, 1);
  await waitBufferFullEvent();

  // Apply a new buffer size limit
  performance.setResourceTimingBufferSize(0);
  // Buffer is not cleared on `performance.setResourceTimingBufferSize`.
  assert.strictEqual(performance.getEntriesByType('resource').length, 1);

  performance.clearResourceTimings();
  assert.strictEqual(performance.getEntriesByType('resource').length, 0);
  // Trigger a resourcetimingbufferfull event.
  performance.markResourceTiming(...args);
  // New entry is not added to the global buffer.
  assert.strictEqual(performance.getEntriesByType('resource').length, 0);
  await waitBufferFullEvent();

  // Apply a new buffer size limit
  performance.setResourceTimingBufferSize(1);
  performance.markResourceTiming(...args);
  assert.strictEqual(performance.getEntriesByType('resource').length, 1);
}