Filtered Exception Catching in Bluebird Promise

.gitignore

node_modules

Class.js

var Promise = require('bluebird');
var ErrorA = require('./ErrorA');


exports.method_1 =  function() {
    return new Promise(function(resolve, reject){
        console.log("In Class_A.Method_1, delaying for 2 sec");
        Promise.delay(2000, this)
        .then(function(){
            console.log("Class_A.Method_1 resolved");
            resolve();
        });
    });
};

exports.method_2 =  function() {
    return new Promise(function(resolve, reject){
        console.log("In Class_A.Method_2, delaying for 2 sec");
        Promise.delay(2000, this)
        .then(function(){
            console.log("Class_A.Method_2 resolved");
            resolve();
        });
    });
};

exports.method_3 =  function() {
    return new Promise(function(resolve, reject){
        console.log("In Class_A.Method_3, delaying for 2 sec");
        Promise.delay(2000, this)
        .then(function(){
            console.log("Class_A.Method_3 resolved");
            resolve();
        });
    });
};

exports.method_4_fail = function(){
    return new Promise(function(resolve, reject){
        console.log("In Class_A.Method_4_fail fail, delaying for 2 sec");
        Promise.delay(2000, this)
        .then(function(){
            reject(new ErrorA("Custom message goes here"));
        });
    });
};

exports.failFileRead = function(){
    return new Promise(function(resolve, reject){
        fs.readFile('./somefile.txt', function(err, data){
            if (err)
                reject(err);
            else
                resolve();
        });
    });
};

ErrorA.js

//This is Error A

function ErrorA(message) {
    this.name = "Error A";
    this.code = "code_error_A";
    this.message = message;
}
ErrorA.prototype = Object.create(Error.prototype);

module.exports = ErrorA;

ErrorB.js

//This is Error A

function ErrorB(message) {
    this.name = "Error B";
    this.code = "code_error_B";
    this.message = message;
}
ErrorB.prototype = Object.create(Error.prototype);

module.exports = ErrorB;

index.js

var Class_A_Method_1 = require("./ClassA").method_1;
var Class_A_Method_2 = require("./ClassA").method_2;
var Class_A_Method_3 = require("./ClassA").method_3;
var Class_A_Method_4_fail = require("./ClassA").method_4_fail;

Class_A_Method_1()
.then(Class_A_Method_2)
.then(Class_A_Method_3)
.then(Class_A_Method_4_fail) // this will fail
.catch(function(error){
    console.log(error);
});

index2.js

var MethodA_Success = require("./MethodA").success;
var MethodB_Success = require("./MethodB").success;

var MethodA_Fail = require("./MethodA").fail;
var MethodB_Fail = require("./MethodB").fail;
var MethodB_FailFileRead = require("./MethodB").failFileRead;

var ErrorA = require("./ErrorA");
var ErrorB = require("./ErrorB");


MethodA_Fail()
//.then(MethodA_Fail)
.then(function(result){
    console.log(result);
})
//.then(MethodB_Fail)
.then(MethodB_FailFileRead)
.catch(function(error){
    console.log("Caught Error A");
    console.log(error);
})
.then(MethodB_Success)
.then(function(result){
    console.log(result);
})
// .catch(ErrorA, function(error){
//     console.log("Caught Error A");
//     console.log(error);
// })
// .catch(ErrorB, function(error){
//     console.log("Caught Error B");
//     console.log(error);
// })
.catch({code: 'ENOENT'}, function(error){
    console.log("Caught Error B");
    console.log(error);
})
.catch(function(error){
    if(error instanceof ErrorA)
        console.log("Error A caught");

    else if(error instanceof ErrorB)
        console.log("Error B caught");

    console.log(error);
});

npm-debug.log

0 info it worked if it ends with ok
1 verbose cli [ '/usr/local/bin/node', '/usr/local/bin/npm', 'start' ]
2 info using [email protected]
3 info using [email protected]
4 verbose stack Error: missing script: start
4 verbose stack     at run (/usr/local/lib/node_modules/npm/lib/run-script.js:151:19)
4 verbose stack     at /usr/local/lib/node_modules/npm/lib/run-script.js:61:5
4 verbose stack     at /usr/local/lib/node_modules/npm/node_modules/read-package-json/read-json.js:356:5
4 verbose stack     at checkBinReferences_ (/usr/local/lib/node_modules/npm/node_modules/read-package-json/read-json.js:320:45)
4 verbose stack     at final (/usr/local/lib/node_modules/npm/node_modules/read-package-json/read-json.js:354:3)
4 verbose stack     at then (/usr/local/lib/node_modules/npm/node_modules/read-package-json/read-json.js:124:5)
4 verbose stack     at /usr/local/lib/node_modules/npm/node_modules/read-package-json/read-json.js:311:12
4 verbose stack     at /usr/local/lib/node_modules/npm/node_modules/graceful-fs/graceful-fs.js:78:16
4 verbose stack     at tryToString (fs.js:455:3)
4 verbose stack     at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:442:12)
5 verbose cwd /Users/prashanta/dev/sandbox/89b82a737e8e2ea300682d1b8f8fce7d
6 error Darwin 16.4.0
7 error argv "/usr/local/bin/node" "/usr/local/bin/npm" "start"
8 error node v6.9.2
9 error npm  v3.10.9
10 error missing script: start
11 error If you need help, you may report this error at:
11 error     <https://github.com/npm/npm/issues>
12 verbose exit [ 1, true ]

package.json

{
  "name": "89b82a737e8e2ea300682d1b8f8fce7d",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "git+ssh://[email protected]/89b82a737e8e2ea300682d1b8f8fce7d.git"
  },
  "author": "",
  "license": "ISC",
  "bugs": {
    "url": "https://gist.github.com/89b82a737e8e2ea300682d1b8f8fce7d"
  },
  "homepage": "https://gist.github.com/89b82a737e8e2ea300682d1b8f8fce7d",
  "dependencies": {
    "bluebird": "^3.5.0"
  }
}