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- var assert = require('assert');
- var Kareem = require('../');
- describe('wrap()', function() {
- var hooks;
- beforeEach(function() {
- hooks = new Kareem();
- });
- it('handles pre errors', function(done) {
- hooks.pre('cook', function(done) {
- done('error!');
- });
- hooks.post('cook', function(obj) {
- obj.tofu = 'no';
- });
- var obj = { bacon: 0, eggs: 0 };
- var args = [obj];
- args.push(function(error, result) {
- assert.equal('error!', error);
- assert.ok(!result);
- assert.equal(undefined, obj.tofu);
- done();
- });
- hooks.wrap(
- 'cook',
- function(o, callback) {
- // Should never get called
- assert.ok(false);
- callback(null, o);
- },
- obj,
- args);
- });
- it('handles pre errors when no callback defined', function(done) {
- hooks.pre('cook', function(done) {
- done('error!');
- });
- hooks.post('cook', function(obj) {
- obj.tofu = 'no';
- });
- var obj = { bacon: 0, eggs: 0 };
- var args = [obj];
- hooks.wrap(
- 'cook',
- function(o, callback) {
- // Should never get called
- assert.ok(false);
- callback(null, o);
- },
- obj,
- args);
- setTimeout(
- function() {
- done();
- },
- 25);
- });
- it('handles errors in wrapped function', function(done) {
- hooks.pre('cook', function(done) {
- done();
- });
- hooks.post('cook', function(obj) {
- obj.tofu = 'no';
- });
- var obj = { bacon: 0, eggs: 0 };
- var args = [obj];
- args.push(function(error, result) {
- assert.equal('error!', error);
- assert.ok(!result);
- assert.equal(undefined, obj.tofu);
- done();
- });
- hooks.wrap(
- 'cook',
- function(o, callback) {
- callback('error!');
- },
- obj,
- args);
- });
- it('handles errors in post', function(done) {
- hooks.pre('cook', function(done) {
- done();
- });
- hooks.post('cook', function(obj, callback) {
- obj.tofu = 'no';
- callback('error!');
- });
- var obj = { bacon: 0, eggs: 0 };
- var args = [obj];
- args.push(function(error, result) {
- assert.equal('error!', error);
- assert.ok(!result);
- assert.equal('no', obj.tofu);
- done();
- });
- hooks.wrap(
- 'cook',
- function(o, callback) {
- callback(null, o);
- },
- obj,
- args);
- });
- it('defers errors to post hooks if enabled', function(done) {
- hooks.pre('cook', function(done) {
- done(new Error('fail'));
- });
- hooks.post('cook', function(error, res, callback) {
- callback(new Error('another error occurred'));
- });
- var args = [];
- args.push(function(error) {
- assert.equal(error.message, 'another error occurred');
- done();
- });
- hooks.wrap(
- 'cook',
- function(callback) {
- assert.ok(false);
- callback();
- },
- null,
- args,
- { useErrorHandlers: true, numCallbackParams: 1 });
- });
- it('error handlers with no callback', function(done) {
- hooks.pre('cook', function(done) {
- done(new Error('fail'));
- });
- hooks.post('cook', function(error, callback) {
- assert.equal(error.message, 'fail');
- done();
- });
- var args = [];
- hooks.wrap(
- 'cook',
- function(callback) {
- assert.ok(false);
- callback();
- },
- null,
- args,
- { useErrorHandlers: true });
- });
- it('error handlers with no error', function(done) {
- hooks.post('cook', function(error, callback) {
- callback(new Error('another error occurred'));
- });
- var args = [];
- args.push(function(error) {
- assert.ifError(error);
- done();
- });
- hooks.wrap(
- 'cook',
- function(callback) {
- callback();
- },
- null,
- args,
- { useErrorHandlers: true });
- });
- it('works with no args', function(done) {
- hooks.pre('cook', function(done) {
- done();
- });
- hooks.post('cook', function(callback) {
- obj.tofu = 'no';
- callback();
- });
- var obj = { bacon: 0, eggs: 0 };
- var args = [];
- hooks.wrap(
- 'cook',
- function(callback) {
- callback(null);
- },
- obj,
- args);
- setTimeout(
- function() {
- assert.equal('no', obj.tofu);
- done();
- },
- 25);
- });
- it('handles pre errors with no args', function(done) {
- hooks.pre('cook', function(done) {
- done('error!');
- });
- hooks.post('cook', function(callback) {
- obj.tofu = 'no';
- callback();
- });
- var obj = { bacon: 0, eggs: 0 };
- var args = [];
- hooks.wrap(
- 'cook',
- function(callback) {
- callback(null);
- },
- obj,
- args);
- setTimeout(
- function() {
- assert.equal(undefined, obj.tofu);
- done();
- },
- 25);
- });
- it('handles wrapped function errors with no args', function(done) {
- hooks.pre('cook', function(done) {
- obj.waffles = false;
- done();
- });
- hooks.post('cook', function(callback) {
- obj.tofu = 'no';
- callback();
- });
- var obj = { bacon: 0, eggs: 0 };
- var args = [];
- hooks.wrap(
- 'cook',
- function(callback) {
- callback('error!');
- },
- obj,
- args);
- setTimeout(
- function() {
- assert.equal(false, obj.waffles);
- assert.equal(undefined, obj.tofu);
- done();
- },
- 25);
- });
- it('handles post errors with no args', function(done) {
- hooks.pre('cook', function(done) {
- obj.waffles = false;
- done();
- });
- hooks.post('cook', function(callback) {
- obj.tofu = 'no';
- callback('error!');
- });
- var obj = { bacon: 0, eggs: 0 };
- var args = [];
- hooks.wrap(
- 'cook',
- function(callback) {
- callback();
- },
- obj,
- args);
- setTimeout(
- function() {
- assert.equal(false, obj.waffles);
- assert.equal('no', obj.tofu);
- done();
- },
- 25);
- });
- it('catches sync errors', function(done) {
- hooks.pre('cook', function(done) {
- done();
- });
- hooks.post('cook', function(callback) {
- callback();
- });
- var args = [];
- args.push(function(error) {
- assert.equal(error.message, 'oops!');
- done();
- });
- hooks.wrap(
- 'cook',
- function() {
- throw new Error('oops!');
- },
- null,
- args);
- });
- it('sync wrappers', function() {
- var calledPre = 0;
- var calledFn = 0;
- var calledPost = 0;
- hooks.pre('cook', function() {
- ++calledPre;
- });
- hooks.post('cook', function() {
- ++calledPost;
- });
- var wrapper = hooks.createWrapperSync('cook', function() { ++calledFn; });
- wrapper();
- assert.equal(calledPre, 1);
- assert.equal(calledFn, 1);
- assert.equal(calledPost, 1);
- });
- });
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