![dependencyReferences
npm install <package> --save[-dev|-optional]
--save or --save-dev or --save-optional](https://image.slidesharecdn.com/testdrivennode-130722102324-phpapp02/85/Test-driven-node-js-12-320.jpg)
![assert(value)
.ok(value)
.equal(actual,
expected)
.notEqual(actual,
expected)
.deepEqual(actual,
expected)
.notDeepEqual(actual,
expected)
.strictEqual(actual,
expected)
.notStrictEqual(actual,
expected)
.throws(block,
[error])
.doesNotThrow(block,
[error])
.ifError(value)](https://image.slidesharecdn.com/testdrivennode-130722102324-phpapp02/85/Test-driven-node-js-18-320.jpg)
![1 suite('When searching for Apples', function(done) {
setup(function(done){
2
items.save(['fiji apples',
3
'empire apples'], done);
4
});
5
test('it should not error', function(done) {
6
search.find("Apples", done);
7
});
8
test('it should return 2 items', function(done) {
9
search.find("Apples", function(err, res) {
10
if (err) return done(err);
11
res.should.have.length(2);
12
done();
13
});
14
});
15
16 });
17
18](https://image.slidesharecdn.com/testdrivennode-130722102324-phpapp02/85/Test-driven-node-js-55-320.jpg)
![dependencyReferences
npm install <package> --save[-dev|-optional]
--save or --save-dev or --save-optional](https://image.slidesharecdn.com/testdrivennode-130722102324-phpapp02/75/Test-driven-node-js-12-2048.jpg)
![assert(value)
.ok(value)
.equal(actual,
expected)
.notEqual(actual,
expected)
.deepEqual(actual,
expected)
.notDeepEqual(actual,
expected)
.strictEqual(actual,
expected)
.notStrictEqual(actual,
expected)
.throws(block,
[error])
.doesNotThrow(block,
[error])
.ifError(value)](https://image.slidesharecdn.com/testdrivennode-130722102324-phpapp02/75/Test-driven-node-js-18-2048.jpg)
![1 suite('When searching for Apples', function(done) {
setup(function(done){
2
items.save(['fiji apples',
3
'empire apples'], done);
4
});
5
test('it should not error', function(done) {
6
search.find("Apples", done);
7
});
8
test('it should return 2 items', function(done) {
9
search.find("Apples", function(err, res) {
10
if (err) return done(err);
11
res.should.have.length(2);
12
done();
13
});
14
});
15
16 });
17
18](https://image.slidesharecdn.com/testdrivennode-130722102324-phpapp02/75/Test-driven-node-js-55-2048.jpg)
Uploaded byJay Harris
Test driven node.js
Node.js is a platform for building fast, scalable network applications using JavaScript. The document covers testing in Node.js using frameworks like Mocha and Chai, including installation, usage, and various assertion techniques. It also touches on behavior-driven development (BDD) and test-driven development (TDD) methodologies, along with examples of setting up tests and handling assertions.
More Related Content
Test driven node.js
- 1.
- 2. What is node.js? “ Node.jsis a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. ”
- 4.
- 5.
- 6. is not anacronym
- 7. is an acronym NationalAssociation of Pastoral Musicians
- 8. github: isaacs/npm install: comeswith node
- 9.
- 10. globalInstallation npm install <package>--global -g or --global
- 11.
- 12. dependencyReferences npm install <package>--save[-dev|-optional] --save or --save-dev or --save-optional
- 13.
- 14.
- 15. “ TDD is tocoding style as yoga is to posture. Even when you're not actively practicing, having done so colors your whole life healthier. ” j. kerr
- 16.
- 17. var assert = require('assert');
- 18. assert(value) .ok(value) .equal(actual, expected) .notEqual(actual, expected) .deepEqual(actual, expected) .notDeepEqual(actual, expected) .strictEqual(actual, expected) .notStrictEqual(actual, expected) .throws(block, [error]) .doesNotThrow(block, [error]) .ifError(value)
- 19. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 var assert =require('assert'); // Will pass assert.ok(true); // Will throw an exception assert.ok(false);
- 20. 1 var assert= require('assert'); 2 3 // Will throw 'false == true' error 4 assert.ok(typeof 'hello' === 'number'); 5 6 7 8 9 10 11 12 13 14 15 16 17 18
- 21. $ node test.js assert.js:104 throw new assert.AssertionError({ ^ AssertionError: false == true at Object.<anonymous> (my-‐test.js:7:8) at Module._compile (module.js:449:26) at Object.Module._extensions..js (module.js:467:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Module.runMain (module.js:487:10) at process.startup.processNextTick.process._tick... $ _
- 22.
- 23. github: chaijs/chai install: npminstall chai
- 24. isTrue, isFalse, isNull, isNotNull, isUndefined, isDefined, isFunction, isNotFunction, isArray, isNotArray, isBoolean, isNotBoolean, isNumber, isNotNumber, isString, isNotString, include, lengthOf, operator, closeTo isObject, isNotObject, typeOf, notTypeOf, instanceOf, notInstanceOf, match, notMatch, property, notProperty, deepProperty, notDeepProperty, propertyVal, propertyNotVal, deepPropertyVal, deepPropertyNotVal, additional assertions
- 25. var assert = require('chai').assert;
- 26. 1 var assert= require('chai').assert; 2 3 // Will throw 'expected 'hello' to be a number' 4 assert.isNumber('hello'); 5 6 7 8 9 10 11 12 13 14 15 16 17 18
- 27. $ node test.js expected 'hello' to be a number $ _
- 28. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 var chai = require('chai') ,assert = chai.assert; chai.Assertion.includeStack = true; // Will throw and display stack assert.isNumber('hello');
- 29.
- 30. Exceptions alone areinsufficient
- 31. $ node my-‐test.js assert.js:104 throw new assert.AssertionError({ ^ AssertionError: false == true at Object.<anonymous> (my-‐test.js:7:8) at Module._compile (module.js:449:26) at Object.Module._extensions..js (module.js:467:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Module.runMain (module.js:487:10) at process.startup.processNextTick.process._tick... $ _
- 32. We need atesting framework!
- 33.
- 34. mocha github: visionmedia/mocha install: npminstall -g mocha
- 35. $ npm install -‐g mocha $ mkdir test $ mocha ✔ 0 tests complete (1ms) $
- 36. var mocha = require('mocha');
- 37. tddSyntax suite('Testing out this thing', function() { test('should do stuff', function() { // Assertion tests }); });
- 38. ./test/my-test.js 1 var assert= require('chai').assert; 2 3 suite('Assertions', function() { test('should pass on truthiness', function() { 4 assert.ok(true); 5 }); 6 test('should fail on falsiness', function() { 7 assert.ok(false); 8 }); 9 10 }); 11 12 13 14 15 16
- 39. $ mocha -‐-‐ui tdd -‐-‐reporter spec Assertions ✓ should pass on truthiness 1) should fail on falsiness ✖ 1 of 2 tests failed: 1) Assertions should fail on falsiness: AssertionError: false == true at (stack trace omitted for brevity) $ _
- 40.
- 41. groupSyntax suite('Testing out this thing', function() { suite('with a subset of this other thing', function() { test('should do stuff', function() { // Assertion tests }); }); });
- 42. 1 var assert= require('chai').assert; 2 3 suite('Assertions', function() { suite('of truthiness', function() { 4 test('should pass on true', function() { 5 assert.isTrue(true); 6 }); 7 test('should pass on false', function() { 8 assert.isFalse(false); 9 }); 10 }); 11 suite('of type', function() { 12 test('should pass on number', function() { 13 assert.isNumber(5); 14 }); 15 }); 16 17 }); 18
- 43. $ mocha -‐-‐ui tdd -‐-‐reporter spec Assertions of truthiness ✓ should pass on true ✓ should pass on false of type ✓ should pass on number ✔ 3 tests complete (6ms) $ _
- 44.
- 45. pendingSyntax suite('Testing out this thing', function() { suite('with a subset of this other thing', function() { test('should do stuff someday'); }); });
- 46. 1 var assert= require('chai').assert; 2 3 suite('Assertions', function() { suite('of truthiness', function() { 4 test('should pass on true', function() { 5 assert.isTrue(true); 6 }); 7 test('should pass on false', function() { 8 assert.isFalse(false); 9 }); 10 }); 11 suite('of type', function() { 12 test('should pass on number', function() { 13 assert.isNumber(5); 14 }); 15 test('should pass on object'); 16 }); 17 18 });
- 47. $ mocha -‐-‐ui tdd -‐-‐reporter spec Assertions of truthiness ✓ should pass on true ✓ should pass on false of type ✓ should pass on number -‐ should pass on object ✔ 4 tests complete (6ms) • 1 test pending $ _
- 48.
- 49.
- 50. setupTeardown suite('Testing out this thing', function() { setup(function(){ // ... }; suite('with a subset of this other thing', function() { test('should do stuff', function() { // Assertion tests }); teardown(function(){ // ... }; }); });
- 51.
- 52. asynchronousSyntax test('it should not error', function(done) { search.find("Apples", done); });
- 53. asynchronousSyntax test('it should not error', function(done) { search.find("Apples", done); }); test('it should return 2 items', function(done) { search.find("Apples", function(err, res) { if (err) return done(err); res.should.have.length(2); done(); }); });
- 54. All Mocha functionsaccept this callback
- 55. 1 suite('When searchingfor Apples', function(done) { setup(function(done){ 2 items.save(['fiji apples', 3 'empire apples'], done); 4 }); 5 test('it should not error', function(done) { 6 search.find("Apples", done); 7 }); 8 test('it should return 2 items', function(done) { 9 search.find("Apples", function(err, res) { 10 if (err) return done(err); 11 res.should.have.length(2); 12 done(); 13 }); 14 }); 15 16 }); 17 18
- 56.
- 57. be nice toyourself: $ mocha -‐-‐ui tdd -‐-‐reporter spec should be simplified to $ make test and $ npm test
- 58. ./makefile 1 # Makefilefor sample module 2 3 test: mocha --reporter spec --ui tdd 4 5 6 7 8 .PHONY: test 9 10 11 12 13 14 15 16
- 59. ./makefile 1 # Makefilefor sample module 2 3 test: mocha 4 --reporter spec 5 --ui tdd 6 7 8 .PHONY: test 9 10 11 12 13 14 15 16
- 60. ./package.json 1 { "name": "sample", 2 "version":"0.1.0", 3 "devDependencies": { 4 "chai": "~1.2.0" 5 }, 6 "scripts": { 7 "test": "make test" 8 } 9 10 } 11 12 13 14 15 16
- 61. $ make test Assertions ✓ should pass on truthiness 1) should fail on falsiness ✖ 1 of 2 tests failed: 1) Assertions should fail on falsiness: AssertionError: false == true at (stack trace omitted for brevity) $ _
- 62. $ npm test Assertions ✓ should pass on truthiness 1) should fail on falsiness ✖ 1 of 2 tests failed: 1) Assertions should fail on falsiness: AssertionError: false == true at (stack trace omitted for brevity) $ _
- 63. eliminate global dependency $ npm install mocha -‐-‐link
- 64. 1 test: @./node_modules/.bin/mocha 2 --reporterspec 3 --ui tdd 4 5 6 .PHONY: test 7 8 9 10 11 12 13 14 15 16 17 18
- 65. update dev dependencies $ npm install mocha -‐-‐save-‐dev $ npm install chai -‐-‐save-‐dev
- 66. $ npm install mocha -‐-‐save-‐dev $ npm install chai -‐-‐save-‐dev $ git diff package.json diff -‐-‐git a/package.json b/package.json index 439cf44..3609bb9 100644 -‐-‐-‐ a/package.json +++ b/package.json @@ -‐1,5 +1,7 @@ { "name": "sample", -‐ "version": "0.1.0" + "version": "0.1.0", + "devDependencies": { + "mocha": "~1.4.0", + "chai": "~1.2.0" + } }
- 67.
- 68. slowThreshold mocha --slow <ms> -s<ms> or --slow <ms>
- 69. $ mocha -‐-‐reporter spec -‐-‐slow 5 When accessing the Ticket API with valid Morale credentials, and with a project that exists, getting a list of tickets ✓ should return without an error ✓ should return a populated array (5ms) ✓ should contain a task or bug ticket adding a new ticket ✓ should return without an error ✓ should return the new ticket (11ms) ✔ 5 tests complete (22ms) $ _
- 70.
- 71. $ mocha -‐-‐watch ✔ 5 tests complete (22ms) ^ watching
- 72.
- 73. mac: apple appstore win: growlForWindows.com also: growlNotify
- 74.
- 75.
- 76. 1 test: @./node_modules/.bin/mocha 2 --reporterspec 3 --ui tdd 4 5 6 watch: @./node_modules/.bin/mocha 7 --reporter min 8 --ui tdd 9 --growl 10 --watch 11 12 13 .PHONY: test watch 14 15 16 17 18
- 77.
- 78. tddSyntax suite('Test this thing', function() { test('Do stuff', function() { // Assertion tests }); }); bddSyntax describe('Testing out this thing', function() { it('should do stuff', function() { // Assertion tests }); });
- 79. 1 test: @./node_modules/.bin/mocha 2 --reporterspec 3 --ui bdd 4 5 6 watch: @./node_modules/.bin/mocha 7 --reporter min 8 --ui bdd 9 --growl 10 --watch 11 12 13 .PHONY: test 14 15 16 17 18
- 80. 1 test: @./node_modules/.bin/mocha 2 --reporterspec 3 4 5 6 watch: @./node_modules/.bin/mocha 7 --reporter min 8 --growl 9 --watch 10 11 12 13 .PHONY: test 14 15 16 17 18
- 81.
- 82.
- 83. setupTeardown describe('Testing out this thing', function() { before(function(){ // ... }; describe('with a subset of that thing', function() { it('should do stuff', function() { // Assertion tests }); afterEach(function(){ // ... }; }); });
- 84. There is notdd equivalent to ‘each’
- 85.
- 86.
- 87. assertSyntax assert.isObject(person); assert.property(person, "age"); assert.isNumber(person.age); assert.equals(person.age, 34); expectSyntax expect(person).to.be.an('object'); .with.property('age') .that.is.a('number') .that.equals(34);
- 88. var expect = require('chai').expect;
- 89.
- 90. expect(person).to.exist .and.be.an('object') .with.property('age') .that.is.to.exist .and.is.a('number') .and.equals(34);
- 91.
- 92. expect(person).to.exist .and.be.an('object') .with.property('age') .that.is.to.exist .and.is.a('number') .and.equals(34);
- 93. expect(person).to.exist .and.be.an('object') .with.property('age') .that.is.to.exist .and.is.a('number') .and.equals(34);
- 94.
- 95. expect(person) .that.is.an('object') .with.property('address') .that.is.an('object') .with.property('city') .that.is.a('string') .and.equals('Detroit')
- 96.
- 97. assertSyntax assert.isObject(person); assert.property(person, "age"); assert.isNumber(person.age); assert.equals(person.age, 34); shouldSyntax person.should.be.an('object') .with.property('age') .that.is.a('number') .that.equals(34);
- 98. var should = require('chai').should();
- 99. var chai = require('chai') , expect = chai.expect , should = chai.should();
- 100. assertionChains same as expectstyle* except for existence
- 101.
- 102.
- 103. skipSyntax describe('Testing out this thing', function() { it.skip('should be skipped', function() { // Assertion tests }); }); describe.skip('This entire suite will be skipped', function() { it('should do stuff', function() { // Assertion tests }); });
- 104. 1 describe('Assertions', function(){ describe('of truthiness', function() { 2 it('should pass on truthiness', function() { 3 assert.isTrue(true); 4 }); 5 it('should pass on falsiness', function() { 6 assert.isFalse(false); 7 }); 8 }); 9 describe('of type', function() { 10 it.skip('should pass on number', function() { 11 assert.isNumber(5); 12 }); 13 it('should pass on object'); 14 }); 15 16 }); 17 18
- 105. $ make test Assertions of truthiness ✓ should pass on truthiness ✓ should pass on falsiness of type -‐ should pass on number -‐ should pass on object ✔ 4 tests complete (6ms) • 2 test pending $ _
- 106. Skip is availablein bdd only
- 107.
- 108. JavaScript ships witha mocking framework ...it’s called JavaScript
- 109. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 var me ={firstName: 'Jay' , lastName: 'Harris' , getFullName: function() { return this.firstName + ' ' + this.lastName; }}; // Returns 'Jay Harris' me.getFullName(); me.getFullName = function() { return 'John Doe'; }; // Returns 'John Doe' me.getFullName();
- 110.
- 111. nock github: flatiron/nock install: npminstall nock
- 112. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 var http =require('http'); var reqOptions = { host: 'api.twitter.com', path: '/1/statuses/user_timeline.json?' + 'screen_name=jayharris' }; var resCallback = function(res) { var responseData = ''; res.on('data', function(chunk) { responseData += chunk; }); res.on('end', function() { console.log(responseData); }); }; http.request(reqOptions, resCallback).end();
- 113. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 var nock =require('nock'); var twitter = nock('http://api.twitter.com') .get('/1/statuses/user_timeline.json?'+ 'screen_name=jayharris') .reply(200, "This worked"); // Returns "This worked" http.request(reqOptions, resCallback).end();
- 114. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 // Returns liveTwitter data http.request(reqOptions, resCallback).end(); var nock = require('nock'); var twitter = nock('http://api.twitter.com') .get('/1/statuses/user_timeline.json?'+ 'screen_name=jayharris') .reply(200, "This worked"); // Returns "This worked" http.request(reqOptions, resCallback).end(); // Returns live Twitter data http.request(reqOptions, resCallback).end();
- 115.
- 116.
- 117. Sinon.js github: cjohansen/Sinon.JS install: npminstall sinon
- 118.
- 119. Zombie.js Fast, headlessbrowser
- 120. Zombie.js github: assaf/zombie install: npminstall zombie
- 121.
- 122.
- 123. nodeload github: benschmaus/nodeload install: npminstall nodeload
- 124.
- 125. Color your wholelife healthier
- 126. jay harris P RE S I D E N T jay@aranasoft.com #testdrivennode @jayharris