v8/test/mjsunit/async-hooks/promises-async-await.js

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// Flags: --expose-async-hooks

// Check for executionAsyncId/triggerAsyncId when chained promises and
// async/await are combined
(function() {
  let p;
  let outerExecutionAsyncId = -1, outerTriggerAsyncId = -1;

  function inIrrelevantContext(resolve) {
    resolve(42);
  }

  function inContext1(foo) {
    foo();
  }

  function inContext2(foo) {
    foo();
  }

  outerExecutionAsyncId = async_hooks.executionAsyncId();
  outerTriggerAsyncId = async_hooks.triggerAsyncId();

  inContext1(() => {
    p = new Promise(resolve => {
      assertEquals(outerExecutionAsyncId, async_hooks.executionAsyncId());
      assertEquals(outerTriggerAsyncId, async_hooks.triggerAsyncId());
      inIrrelevantContext(resolve);
    }).then(() => {
      assertNotEquals(outerExecutionAsyncId, async_hooks.executionAsyncId());
      assertNotEquals(outerTriggerAsyncId, async_hooks.triggerAsyncId());
    }).catch((err) => {
      setTimeout(() => {
        throw err;
      }, 0);
    });
  });

  inContext2(async () => {
    assertEquals(outerExecutionAsyncId, async_hooks.executionAsyncId());
    assertEquals(outerTriggerAsyncId, async_hooks.triggerAsyncId());
    await p;
    assertNotEquals(outerExecutionAsyncId, async_hooks.executionAsyncId());
    assertNotEquals(outerTriggerAsyncId, async_hooks.triggerAsyncId());
  });

})();