蓝鸟未处理的错误与发出NodeJS

Question

im using Bluebird v2.8.2 Promises, but im getting unhandled error and code in catch is not processed.

EDITED to respones:

var Promise = require('bluebird')
    util = require('util')
    EventEmitter = require('events').EventEmitter;

var Module = function() {
    EventEmitter.call(this);
};

util.inherits(Module, EventEmitter);

var getData = function() {
    return Promise.reject(new Error('test'));
};


Module.prototype.getCustomer = function() {
    var self = this;        

    setTimeout(function() {
        getData().then(function() {})
            .catch(function(error) {
                self.emit('error', error); // This causes problem!!
            });
    }, 1000);
}

SOLVED: Last comment of Esailija

Answer 1

It is processed just fine, however most likely your code inside the catch handler had a bug and threw an error. I suggest you read the printed unhandled error more carefully to see what it is.

The equivalent synchronous code would behave same way:

   try {
        throw new Error("test");
   } catch (e) {
        causesUnhandledReferenceError;
   }

If you wanted to catch that error (You certainly don't, just for exercise) you would need another try catch:

try {
    throw new Error("test");
} catch (e) {
    try {
        doesntCauseUnhandledReferenceError;
    } catch (e) {
        // logs reference error
        console.log(e)
    }
}

Similarly with promises:

getData().then(function() {

}).catch(function(e) {
    doesntCauseUnhandledReferenceError;
}).catch(function(e) {
      // logs reference error
      console.log(e)
});