This document discusses improvements to Xcode and unit testing tools. It covers new features in Xcode 11-12.5 like test plans to run selected tests with configurations, improved error handling, custom asserts, XCTIssue to log issues, XCTSkip to skip tests, XCTExpectFailure to mark expected failures. It emphasizes writing modular tests and recommends using the latest APIs like XCTSkipIf and XCTExpectedFailure to make testing easier.

2. Статистика

3. Quality is the absence
of unnecessary friction
https://dragonsforelevenses.com/2021/09/03/a-useable-definition-of-quality/

4. Testing
https://devcrowd.ru/ios-tools-22

5. Unit testing

6. Testing
UNIT МОДУЛЬНЫЕ

7. Test Pyramid
Пирамида Рожок Рюмка

8. Instruments

9. Instruments
xUnit

10. Instruments

11. iOS-разработчики чаще
всего пишут модульные
тесты на XCTest

12. Что нового?

13. Xcode 11
Test plan
Xcode 11

15. Test plan
● Running tests with different sanitizers/diagnostics
● Testing multiple localizations
● Running selected tests with a specific configuration
● Different test scope:
Xcode 11

16. Test plan
Xcode 11

17. DEMO
Xcode 11

18. Test plan
Xcode 11

19. Test plan
Xcode 11
$ xcodebuild test -scheme ToDo
-destination 'platform=iOS Simulator,OS=13.3,name=iPhone 8’
-testPlan UnitTestsPlan

20. Test plan
Xcode 11

21. Throwing

22. XCTUnwrap
Xcode 11

23. DEMO
Xcode 11

24. Error handling

25. Xcode 11.4

26. Xcode 11.4

27. Custom asserts

28. Small improvements
Xcode 12

29. Small improvements
func assertPairsEqual<T: Equatable, U: Equatable>(actual: (_: T, _: U),
expected: (_: T, _: U),
file: StaticString = #file,
line: UInt = #line)
func assertPairsEqual<T: Equatable, U: Equatable>(actual: (_: T, _: U),
expected: (_: T, _: U),
file: StaticString = #filepath,
line: UInt = #line)
Xcode 11.5

30. Xcode 12

31. func assertIntPairsEqual(actual: (_: Int, _: Int),
expected: (_: Int, _: Int),
file: StaticString = #file,
line: UInt = #line) {
if actual != expected {
XCTFail("Expected (expected) but was (actual)",
file: file, line: line)
}
}
Xcode 12

32. XCTIssue
Xcode 12

33. DEMO
Xcode 12

34. Asserts

35. XCTSkip

36. Skipping tests
func testThatSkips() throws {
try XCTSkipUnless(qaServerReachable(), "QA server not reachable")
// Retrieve test data
// Perform test
}
Xcode 11.4

37. Skipping tests
Xcode 11.4

38. Skipping tests
https://developer.apple.com/documentation/xctest/3521325-xctskipif

39. Skipping tests

40. XCTExpectFailure

41. Identical
Xcode 12.5

42. Expected failure
Xcode 12.5

43. XCTAssertIdentical
Xcode 12.5

44. Identical
Xcode 12.5

45. Identical
XCTAssertTrue(
actual === expected,
"Expected (expected), but was (actual)"
)
// ————————————
XCTAssertIdentical(actual, expected)
Xcode 12.5

46. DEMO
Xcode 12.5

47. Мелочи

48. Small improvements
Xcode 11.4

49. Xcode 12

50. https://developer.apple.com/videos/play/wwdc2022/110361/

51. Июнь 2022
Пишем модульные тесты
API развивается, используйте актуальное, чтобы жизнь
стала лучше
SkipIf и ExpectedFailure = ❤
@asychev
@brain89