promise-a-plus/test/test_catch.js

A JavaScript Promise/A+ Library.

var assert = require('assert');
var Promise = require('../promise.js');

describe('Custom Promise Test', function() {
    describe('#promise.catch', function() {
        describe('promise is rejected, reason is number.', function() {
            it('should run catch callback with the reason', function(done) {
                Promise.reject(1).catch(function(r) {
                    assert(r === 1, 'catch the reason(number)');
                    done();
                });
            });
        });

        describe('promise is rejected, reason is string.', function() {
            it('should run catch callback with the reason', function(done) {
                Promise.reject('no').catch(function(r) {
                    assert(r === 'no', 'catch the reason(string)');
                    done();
                });
            });
        });

        describe('promise is rejected, reason is boolean.', function() {
            it('should run catch callback with the reason', function(done) {
                Promise.reject(false).catch(function(r) {
                    assert(r === false, 'catch the reason(string)');
                    done();
                });
            });
        });

        describe('promise is rejected, reason is object.', function() {
            it('should run catch callback with the reason', function(done) {
                Promise.reject({ x: 1 }).catch(function(r) {
                    assert.deepEqual(r, { x: 1 });
                    done();
                });
            });
        });

        describe('promise is rejected, reason is array.', function() {
            it('should run catch callback with the reason', function(done) {
                Promise.reject([1, 2, 3]).catch(function(r) {
                    assert.deepEqual(r, [1, 2, 3]);
                    done();
                });
            });
        });

        describe('promise is rejected by throw error.', function() {
            it('should run catch callback with error', function(done) {
                new Promise(function(fulfill, reject) {
                    throw 'error';
                }).catch(function(e) {
                    assert(e === 'error', 'catch the reason');
                    done();
                });
            });
        });
    });
});