Question about **promise resolution procedure** 2.3.2 about promises-spec HOT 2 OPEN

"adopt its state" means "permanently adopt its state" i.e. once you've adopted the state of p2, you ignore anything that would modify your own state, as you have already adopted the state of p2.

This is probably tied down more tightly in the ECMA Script specification, because that actually specifies how resolve and reject behave, but this spec only actually specifies what happens to values returned from .then callbacks.

from promises-spec.

A test case like:

Promise.resolve(null).then(() => ({
  then(resolve, reject) {
    const p2 = new Promise((resolve1) => {
      setTimeout(() => {
        resolve1(1);
      }, 1000);
    });

    resolve(p2);

    reject(2);
  }
})).then((value) => {
  console.log('fulfilled:', value);
}, (reason) => {
  console.log('rejected:', reason);
});

would actually be covered by the Promises/A+ specification. Your implementation must print "fulfilled: 1" to be Promises/A+

from promises-spec.