JavaScript Unit Testing

Apr 30, 2010Download as PPT, PDF6 likes1,098 views

There are several tools available for unit testing JavaScript code, including in-browser frameworks like YUI Test and QUnit, headless frameworks like JSpec that can run tests without a browser, and hybrid approaches like JsTestDriver that execute tests in browsers but allow controlling and viewing results from the command line or IDEs. These tools help debug code, ensure changes don't break existing functionality, and test code across multiple browsers and versions. Automated unit tests are more reliable and scalable than manual testing.

JavaScript Unit Testing Tools of the trade

Christian Johansen http://cjohansen.no/en http://twitter.com/cjno http://gitorious.org/~cjohansen http://github.com/cjohansen

Table of Contents Why unit test JavaScript? How to unit test JavaScript? Brief example of unit testing chat client

Which version? IE: 6, 7, 8 ? Firefox: 3.0, 3.5, 3.6, 3.7 ? Safari: 4, 3.1? Opera 10.50, 10.10, 10.0?

Unit tests Run now, run later Run in new browsers Put the test in a file rather than Firebug

How to unit test JavaScript? In-browser test frameworks Headless test frameworks Hybrids

YUI Test Part of the YUI Framework Can test any code Typical in-browser test framework http://developer.yahoo.com/yui/3/test/

The Good Parts Run in any browser Simple to get started (don't even have to download YUI) Many high-level assertions

The Bad Parts Requires HTML fixture Requires internet connection (can be fixed) Does not solve the scaling problem

Similar offerings QUnit http://docs.jquery.com/QUnit JsUnitTest (Prototype.js) http://jsunittest.com/ JsUnit (Since 2001) http://jsunit.net/

JSpec BDD style testing framework Custom grammar (Ruby-like, optional) Run in browser, or headlessly http://visionmedia.github.com/jspec /

The Good Parts Rich library of matchers Runs in browsers, Rhino, Node.js

More Good Parts Command Line Tool Initialize projects Run tests Install libraries +++

JSpec Goodness Built-in stub and mock API Built-in mock XMLHttpRequest Built-in mock timers

The Bad Parts Rhino + env.js = Fully emulated Browser launching still manual Ruby-like DSL (although optional)

The JsTestDriver Way Tests execute in browsers Browsers listen for tests Browsers can run locally or remote Execute in multiple browsers simultaneously

Running Tests Issue test runs from command line ...or from IDE (Eclipse + Idea) View results in command line, IDE

JsTestDriver Server java -jar JsTestDriver-1.2.jar --port 4224

The Good Parts Scales! Test any platform from your machine FAST

More Good Parts Can integrate runner with other assertion frameworks (QUnit, YIU Test++) Coverage tool JUnit compatible XML output

Mocks and Stubs Working on it! http://gitorious.org/sinon

Want More? Out Fall 2010 Rough cuts available: http://my.safaribooksonline.com/9780321684097

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JavaScript Unit Testing

1. JavaScript Unit Testing Tools of the trade

2. Christian Johansen http://cjohansen.no/en http://twitter.com/cjno http://gitorious.org/~cjohansen http://github.com/cjohansen

3. Table of Contents Why unit test JavaScript? How to unit test JavaScript? Brief example of unit testing chat client

4. Why unit test JavaScript?

5. Debugging

7. console.log

10. F5, F5, F5

11.

12.

13.

14.

15.

16.

17.

18. Which version? IE: 6, 7, 8 ? Firefox: 3.0, 3.5, 3.6, 3.7 ? Safari: 4, 3.1? Opera 10.50, 10.10, 10.0?

19. What about mobile?

20. Manual testing It doesn't scale

21. Manual testing Non reproducible

22. Manual testing It's time consuming

23. Automated unit tests

24. Unit tests Run now, run later Run in new browsers Put the test in a file rather than Firebug

25. How to unit test JavaScript? In-browser test frameworks Headless test frameworks Hybrids

26. In-Browser Frameworks

27. YUI Test Part of the YUI Framework Can test any code Typical in-browser test framework http://developer.yahoo.com/yui/3/test/

28. YUI Test 2

29. YUI Test 3

30. HTML Fixture loads test

31. Code To Test: strftime

32. strftime Overview

33. Date formats

34. Unit Test (YUI 3)

35. The Good Parts Run in any browser Simple to get started (don't even have to download YUI) Many high-level assertions

36. The Bad Parts Requires HTML fixture Requires internet connection (can be fixed) Does not solve the scaling problem

37. Similar offerings QUnit http://docs.jquery.com/QUnit JsUnitTest (Prototype.js) http://jsunittest.com/ JsUnit (Since 2001) http://jsunit.net/

38. Headless frameworks

39. JSpec BDD style testing framework Custom grammar (Ruby-like, optional) Run in browser, or headlessly http://visionmedia.github.com/jspec /

40. HTML Fixture

41. JSpec Spec

42. Run From Command Line

43. Result

44. Headless Run

45. The Good Parts Rich library of matchers Runs in browsers, Rhino, Node.js

46. More Good Parts Command Line Tool Initialize projects Run tests Install libraries +++

47. JSpec Goodness Built-in stub and mock API Built-in mock XMLHttpRequest Built-in mock timers

48. The Bad Parts Rhino + env.js = Fully emulated Browser launching still manual Ruby-like DSL (although optional)

49. Hybrids

50. JsTestDriver

51. The JsTestDriver Way Tests execute in browsers Browsers listen for tests Browsers can run locally or remote Execute in multiple browsers simultaneously

52. Running Tests Issue test runs from command line ...or from IDE (Eclipse + Idea) View results in command line, IDE

53. JsTestDriver Server java -jar JsTestDriver-1.2.jar --port 4224

54.

55.

56.

57.

58. JsTestDriver Config

59. JsTestDriver Test

60. Run From Command Line

61. 100% More Color

62. Uh-oh!

63. Run in Eclipse

64. The Good Parts Scales! Test any platform from your machine FAST

65. More Good Parts Can integrate runner with other assertion frameworks (QUnit, YIU Test++) Coverage tool JUnit compatible XML output

66. Continuous Integration

67. JUnit XML Output

68. Hudson

69.

70.

71. Mocks and Stubs Working on it! http://gitorious.org/sinon

72. Quick Live Demo

73. Want More? Out Fall 2010 Rough cuts available: http://my.safaribooksonline.com/9780321684097

74. That's it! http://cjohansen.no/en http://twitter.com/cjno http://gitorious.org/~cjohansen http://github.com/cjohansen

JavaScript Unit Testing

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