Better JavaScript with Jasmine

Quick introduction into the Jasmine testing framework for JavaScript, geared towards the rubyist.

Transcript

1. Better Javascript with Jasmine
2. I don’t test my JavaScript because ______________
3. “Semicolons are for losers”
4. “It can’t be automated”
5. “I already test it with Cucumber”
6. “I don’t have any REAL BUSINESS LOGIC in my JavaScript”
7. “It’s too hard”
8. “It changes too often”
9. “I’m lazy”
10. “It’s not worth the effort”
11. I have [ ] more [ ] less JavaScript in my code than I used to.
12. I have [ X ] more [ ] less JavaScript in my code than I used to.
14. Rubyists need not fear
15. the authors may have seen RSpec before
16. describe RomanNumeral do it "should convert I to 1" do subject = RomanNumeral.new("I") subject.to_i.should eq(1) end end
17. describe("RomanNumeral", function() { it("returns 1 for I", function() { var subject = new RomanNumeral("I"); return expect(subject.toI()).toBe(1); }); });
18. basics
19. RSpec Jasmine describe User do describe(“User”, function() it “saves stuff” do it (“saves stuff”, function() value.should expect(value)
20. matchers
21. RSpec Jasmine name.should eq(“Todd”) expect(name).toBe(“Todd”); (3*3).should_not == 8 expect(3*3).not.toBe(8); be, eql, equal, ==, === toEqual, toBe
24. RSpec Jasmine 7.should be_true expect(7).toBeTruthy(); (7).should_not be(true) expect(7).not.toBe(true); nil.should be_false expect(null).toBeFalsy();
25. RSpec Jasmine [‘a’,’b’].should include(‘a’) expect([3,4]).toContain(4); (1.05).should be_close(1, 0.06) expect(1.05).toBeCloseTo(1, 0) nil.should be_false expect(null).toBeFalsy();
26. toBeDefined / toBeUndefined toMatch(/regex/) toThrow custom matchers as well
27. beforeEach afterEach
28. xdescribe xit
30. test doubles
32. spies
41. stubs
43. jasmine-stealth
45. fakes
47. mocks
48. ease of use
52. but, semicolons are still for losers
53. describe("RomanNumeral", function() { it("returns 1 for I", function() { var subject = new RomanNumeral("I"); return expect(subject.toI()).toBe(1); }); });
54. describe "RomanNumeral", -> it "returns 1 for I", -> subject = new RomanNumeral("I") expect(subject.toI()).toBe 1
55. Great, so how do I run this stuff?
56. www.tryjasmine.com
58. Jasmine standalone
59. https://github.com/ pivotal/jasmine/ downloads
61. Jasmine within Rails
62. gem install jasmine
63. jasmine-headless-webkit
66. gem install jasmine-rails
67. Available for other enviroments as well
68. what now?
69. it’s not that hard
70. it is important
71. you have no excuses
72. Thanks! @toddkaufman @testdouble