25 lines
720 B
JavaScript
25 lines
720 B
JavaScript
|
"use strict";
|
||
|
|
var CustomError = require('../index');
|
||
|
|
var store = {};
|
||
|
|
|
||
|
|
var Err = CustomError('MapError');
|
||
|
|
Err.inuse = CustomError(Err, { message: 'The specified key is already in use.', code: 'INUSE' });
|
||
|
|
|
||
|
|
function add(key, value) {
|
||
|
|
if (Math.random() < .3) throw new Err('Random Error');
|
||
|
|
if (store.hasOwnProperty(key)) throw new Err.inuse();
|
||
|
|
store[key] = value;
|
||
|
|
}
|
||
|
|
|
||
|
|
try {
|
||
|
|
add('x', 1);
|
||
|
|
add('x', 2);
|
||
|
|
} catch (e) {
|
||
|
|
if (e instanceof Err.inuse) {
|
||
|
|
console.error(e.toString()); // "MapError INUSE: The specified key is already in use."
|
||
|
|
} else if (e instanceof Err) {
|
||
|
|
console.error('Unexpected ' + e); // "Unexpected MapError: Random Error"
|
||
|
|
} else {
|
||
|
|
throw e;
|
||
|
|
}
|
||
|
|
}
|