Everything you must know to start develop iPhone Applications in safe and fun way!

2. Does it work?

4. I’m not here to convince you

5. Dry and easy to maintain

6. Better form of documentation

7. Protect

8. Tdd?

9. Tdd?
Test-driven development (TDD) is a
software development technique that relies
on the repetition of a very short development
cycle
http://en.wikipedia.org/wiki/Test-driven_development

10. Tdd?
first the developer writes a failing automated
test case that defines a desired improvement
or new function
http://en.wikipedia.org/wiki/Test-driven_development

11. Tdd?
then produces code to pass that test
http://en.wikipedia.org/wiki/Test-driven_development

12. Tdd?
and finally refactors the new code to
acceptable standard
http://en.wikipedia.org/wiki/Test-driven_development

13. Unit Tests?
A test is not a unit test if:
Michael Feathers

14. Unit Tests?
It talks to a database
Michael Feathers

15. Unit Tests?
It communicates across
the network
Michael Feathers

16. Unit Tests?
It touches the file system
Michael Feathers

17. Unit Tests?
You have to do things to
your environment to run
it (eg, change config files)
Michael Feathers

18. Unit Tests?
Tests that do this are
integration tests
Michael Feathers

19. Automatic Testing Lifecycle
Steps
Fixture Setup

20. Automatic Testing Lifecycle
Steps
Fixture Setup
SUT
Exercise SUT

21. Automatic Testing Lifecycle
Steps
Fixture Setup
SUT
Exercise SUT
Verify Result

22. Automatic Testing Lifecycle
Steps
Fixture Setup
Exercise SUT
Verify Result
Fixture TearDown

23. What about iPhone Dev?

24. Unit Testing for iPhone

25. Former SenTestingKit
OCUnit

26. TestCase definition
#import <SenTestingKit/SenTestingKit.h>
#import "RpnCalculator.h"
@interface RpnCalculatorTestCase : SenTestCase {
! RpnCalculator* rpnCalculator;
}
@end

27. TestCase definition
#import <SenTestingKit/SenTestingKit.h>
#import "RpnCalculator.h"
@interface RpnCalculatorTestCase : SenTestCase {
! RpnCalculator* rpnCalculator;
}
@end

28. TestCase Implementation
@implementation RpnCalculatorTestCase
-(void)setUp{
! rpnCalculator = [[RpnCalculator alloc]init];
}
-(void)testShouldDisplayTwoNumbersWhenNumbersAreSeparatedByEnter{
! [rpnCalculator put:@"1"];
! [rpnCalculator put:@"enter"];
! [rpnCalculator put:@"2"];!
!
! STAssertEqualObjects(@"1n2",rpnCalculator.display,nil);
}
-(void)tearDown{
[rpnCalculator release];
}

29. Fixture Setup
@implementation RpnCalculatorTestCase
-(void)setUp{
! rpnCalculator = [[RpnCalculator alloc]init];
}
-(void)testShouldDisplayTwoNumbersWhenNumbersAreSeparatedByEnter{
! [rpnCalculator put:@"1"];
! [rpnCalculator put:@"enter"];
! [rpnCalculator put:@"2"];!
!
! STAssertEqualObjects(@"1n2",rpnCalculator.display,nil);
}
-(void)tearDown{
[rpnCalculator release];
}

30. Exercise SUT
@implementation RpnCalculatorTestCase
-(void)setUp{
! rpnCalculator = [[RpnCalculator alloc]init];
}
-(void)testShouldDisplayTwoNumbersWhenNumbersAreSeparatedByEnter{
! [rpnCalculator put:@"1"];
! [rpnCalculator put:@"enter"];
! [rpnCalculator put:@"2"];!
!
! STAssertEqualObjects(@"1n2",rpnCalculator.display,nil);
}
-(void)tearDown{
[rpnCalculator release];
}

31. Verify Result
@implementation RpnCalculatorTestCase
-(void)setUp{
! rpnCalculator = [[RpnCalculator alloc]init];
}
-(void)testShouldDisplayTwoNumbersWhenNumbersAreSeparatedByEnter{
! [rpnCalculator put:@"1"];
! [rpnCalculator put:@"enter"];
! [rpnCalculator put:@"2"];!
!
! STAssertEqualObjects(@"1n2",rpnCalculator.display,nil);
}
-(void)tearDown{
[rpnCalculator release];
}

32. Fixture Teardown
@implementation RpnCalculatorTestCase
-(void)setUp{
! rpnCalculator = [[RpnCalculator alloc]init];
}
-(void)testShouldDisplayTwoNumbersWhenNumbersAreSeparatedByEnter{
! [rpnCalculator put:@"1"];
! [rpnCalculator put:@"enter"];
! [rpnCalculator put:@"2"];!
!
! STAssertEqualObjects(@"1n2",rpnCalculator.display,nil);
}
-(void)tearDown{
[rpnCalculator release];
}

33. Assertions
#define STAssertNil(a1, description, ...)
#define STAssertNotNil(a1, description, ...)
#define STAssertTrue(expression, description, ...)
#define STAssertFalse(expression, description, ...)
#define STAssertEqualObjects(a1, a2, description, ...)
#define STAssertEquals(a1, a2, description, ...)
#define STFail(description, ...)
#define STAssertTrueNoThrow(expression, description, ...)
#define STAssertFalseNoThrow(expression, description, ...)
//....

34. Xcode integration

35. Xcode integration

36. Presentation separate from logic

37. Presentation separate from logic

38. Presentation

39. Logic

40. Test

41. Xcode integration

42. Xcode integration

43. What if I have to access network...

44. Or I have correlated components..

45. Mock it!

46. Mock it!
[...] mock objects are
simulated objects that mimic
the behavior of real objects
in controlled ways

47. OCMock
http://www.mulle-kybernetik.com/software/OCMock/

48. Stubs vs Mocks
Mocks
Stubs

49. Stub
- (void)testReturnsStubbedReturnValue
{
! mock = [OCMockObject mockForClass:[NSString class]];
[[[mock stub] andReturn:@"megamock"] lowercaseString];
id returnValue = [mock lowercaseString];
!
STAssertEqualObjects(@"megamock", returnValue, nil);
}

50. Collaboration
SOAPMessage
XMLString
SOAPClient
send
SOAPChannel
post

51. Collaboration
SOAPMessage
XMLString
SOAPClient
send
SOAPChannel
post

52. Collaboration
SOAPMessage
XMLString
SOAPClient
send
SOAPChannel
post

53. Mock
static const NSString * RawSOAPMessage = @"<ENV:evn
xmlns:ENV="http://www.w3.org/....
- (void)testClientShouldSendMessage{
! id msgMock = [OCMockObject mockForClass:[SOAPMessage class]];
! [[[msgMock expect] andReturn:RawSOAPMessage] XMLString];
! id channelMock = [OCMockObject mockForClass:[SOAPChannel class]];
! [[[channelMock expect] andReturn:TRUE] send];
! SOAPClient *client = [SOAPClient initWith:channelMock];
!
! [client sendMessage:msgMock];
! [msgMock verify];
! [channelMock verify];
}

54. Mockery
static const NSString * RawSOAPMessage = @"<ENV:evn
xmlns:ENV="http://www.w3.org/....
- (void)testClientShouldSendMessage{
! id msgMock = [OCMockObject mockForClass:[SOAPMessage class]];
! [[[msgMock expect] andReturn:RawSOAPMessage] XMLString];
! id channelMock = [OCMockObject mockForClass:[SOAPChannel class]];
! [[[channelMock expect] andReturn:TRUE] send];
! SOAPClient *client = [SOAPClient initWith:channelMock];
!
! [client sendMessage:msgMock];
! [msgMock verify];
! [channelMock verify];
}

55. Exercise SUT
static const NSString * RawSOAPMessage = @"<ENV:evn
xmlns:ENV="http://www.w3.org/....
- (void)testClientShouldSendMessage{
! id msgMock = [OCMockObject mockForClass:[SOAPMessage class]];
! [[[msgMock expect] andReturn:RawSOAPMessage] XMLString];
! id channelMock = [OCMockObject mockForClass:[SOAPChannel class]];
! [[[channelMock expect] andReturn:TRUE] send];
! SOAPClient *client = [SOAPClient initWith:channelMock];
!
! [client sendMessage:msgMock];
! [msgMock verify];
! [channelMock verify];
}

56. Verify
static const NSString * RawSOAPMessage = @"<ENV:evn
xmlns:ENV="http://www.w3.org/....
- (void)testClientShouldSendMessage{
! id msgMock = [OCMockObject mockForClass:[SOAPMessage class]];
! [[[msgMock expect] andReturn:RawSOAPMessage] XMLString];
! id channelMock = [OCMockObject mockForClass:[SOAPChannel class]];
! [[[channelMock expect] andReturn:TRUE] send];
! SOAPClient *client = [SOAPClient initWith:channelMock];
!
! [client sendMessage:msgMock];
! [msgMock verify];
! [channelMock verify];
}

57. What’s wrong with Unit Testing?

58. TEST

59. Tdd isn’t about tests, but about
behaviors and specifications

60. A spoonful of syntactic sugar...

61. A spoonful of syntactic sugar...
Behavior Driven
Development

62. should insted of test
matchers instead of Assert

63. Bdd framework for iPhone Dev...

64. Bdd framework for iPhone Dev...

65. Spec Example
-(void)before {
! [SpecHelper loginAsAdmin];
}
-(void)itShouldAddAUser {
! [app.navigationButton touch];
! [[app.textField.with placeholder:@"First Name"] setText:@"Brian"];
! [[app.textField.with placeholder:@"Last Name"] setText:@"Knorr"];
! [[app.textField.with placeholder:@"Email"] setText:@"b@g.com"];
! [[app.textField placeholder:@"Username"] setText:@"bkuser"];
! [[app.textField placeholder:@"Password"] setText:@"test"];
! [[app.textField placeholder:@"Confirm"] setText:@"test"];
! [[app.navigationButton.label text:@"Save"] touch];
! [app timeout:1].alertView.should.not.exist;
! [[app.tableView.label text:@"Brian Knorr"] should].exist;
}
-(void)after {
! [SpecHelper logout];
}

66. Fixture Setup
-(void)before {
! [SpecHelper loginAsAdmin];
}
-(void)itShouldAddAUser {
! [app.navigationButton touch];
! [[app.textField.with placeholder:@"First Name"] setText:@"Brian"];
! [[app.textField.with placeholder:@"Last Name"] setText:@"Knorr"];
! [[app.textField.with placeholder:@"Email"] setText:@"b@g.com"];
! [[app.textField placeholder:@"Username"] setText:@"bkuser"];
! [[app.textField placeholder:@"Password"] setText:@"test"];
! [[app.textField placeholder:@"Confirm"] setText:@"test"];
! [[app.navigationButton.label text:@"Save"] touch];
! [app timeout:1].alertView.should.not.exist;
! [[app.tableView.label text:@"Brian Knorr"] should].exist;
}
-(void)after {
! [SpecHelper logout];
}

67. Exercise SUT
-(void)before {
! [SpecHelper loginAsAdmin];
}
-(void)itShouldAddAUser {
! [app.navigationButton touch];
! [[app.textField.with placeholder:@"First Name"] setText:@"Brian"];
! [[app.textField.with placeholder:@"Last Name"] setText:@"Knorr"];
! [[app.textField.with placeholder:@"Email"] setText:@"b@g.com"];
! [[app.textField placeholder:@"Username"] setText:@"bkuser"];
! [[app.textField placeholder:@"Password"] setText:@"test"];
! [[app.textField placeholder:@"Confirm"] setText:@"test"];
! [[app.navigationButton.label text:@"Save"] touch];
! [app timeout:1].alertView.should.not.exist;
! [[app.tableView.label text:@"Brian Knorr"] should].exist;
}
-(void)after {
! [SpecHelper logout];
}

68. Verify Result
-(void)before {
! [SpecHelper loginAsAdmin];
}
-(void)itShouldAddAUser {
! [app.navigationButton touch];
! [[app.textField.with placeholder:@"First Name"] setText:@"Brian"];
! [[app.textField.with placeholder:@"Last Name"] setText:@"Knorr"];
! [[app.textField.with placeholder:@"Email"] setText:@"b@g.com"];
! [[app.textField placeholder:@"Username"] setText:@"bkuser"];
! [[app.textField placeholder:@"Password"] setText:@"test"];
! [[app.textField placeholder:@"Confirm"] setText:@"test"];
! [[app.navigationButton.label text:@"Save"] touch];
! [app timeout:1].alertView.should.not.exist;
! [[app.tableView.label text:@"Brian Knorr"] should].exist;
}
-(void)after {
! [SpecHelper logout];
}

69. Fixture Teardown
-(void)before {
! [SpecHelper loginAsAdmin];
}
-(void)itShouldAddAUser {
! [app.navigationButton touch];
! [[app.textField.with placeholder:@"First Name"] setText:@"Brian"];
! [[app.textField.with placeholder:@"Last Name"] setText:@"Knorr"];
! [[app.textField.with placeholder:@"Email"] setText:@"b@g.com"];
! [[app.textField placeholder:@"Username"] setText:@"bkuser"];
! [[app.textField placeholder:@"Password"] setText:@"test"];
! [[app.textField placeholder:@"Confirm"] setText:@"test"];
! [[app.navigationButton.label text:@"Save"] touch];
! [app timeout:1].alertView.should.not.exist;
! [[app.tableView.label text:@"Brian Knorr"] should].exist;
}
-(void)after {
! [SpecHelper logout];
}

70. Run On Simulator

71. No XCode Integration Yet

72. Conclusions

73. The Market Asks For Apps

74. More Apps...

75. More Apps...

76. More Apps!

77. Lot to Improve

78. Be Good Kids:

79. Test First!

81. Reclame
http://milano-xpug.pbworks.com/
http://tech.groups.yahoo.com/group/milano-xpug/

82. Questions?