How catch works with multiple promises?

promise-then-catch.js

let test1 = new Promise(function(resolve, reject) {
    resolve('promise 1 result');
    //reject('promise 1 result');
});

test1
  .then((test1Result) => {
    console.log('then 1 ' + test1Result);

    return new Promise(function(resolve, reject) {
        reject('promise 2 result');
    });
  })
  .then((test2Result) => {
    console.log('then 2 ' + test2Result);
  })
  .catch((resultFromWhicheverPromiseFailed) => {
    console.log('catch ' + resultFromWhicheverPromiseFailed);
  });