Unit test
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This document discusses unit testing, including why testing is important, how to begin unit testing, asynchronous testing, and performance testing. It provides an overview of using XCTest to write unit tests in Xcode, including test targets, running and viewing test results. It covers writing asynchronous tests using expectations and measuring performance using the measureBlock method. The document recommends setting baselines and standard deviations for performance tests and provides references for learning more about unit and UI testing.
![Asynchronous Testing
Create Expectation Object:
- XCTestExpectation *expectation = [self expectationWithDescription:@"Load Data"];
XCTestCase waits for Expectations to “Fullfill”
- (void)waitForExpectationsWithTimeout:(NSTimeInterval)timeout handler:(nullable
XCWaitCompletionHandler)handler;
Handle when finishing asynchronous tasks:
- [expectation fulfill];](https://image.slidesharecdn.com/unittest-160310073857/85/Unit-test-21-320.jpg)
Unit test
- 2. Unit Test Why Testing? Beginning Unit Test Asynchronous Testing Performance Testing
- 3. Why Testing? Find bug Clear requirement Maintenance
- 4. How? 1. Code 2. Add Tests 3. Modify code for passing Tests Vs 1. Write Tests 2. Write code that pass Tests (Test-Driven Development)
- 6. Beginning Unit Test XCTest Test Target Running Test Viewing Result
- 7. XCTest Subclass XCTestCase Implement Test method (Beginning with “test”) - (void)testMyMethodWorks Use Assertion (Macro) APIs to report failures - XCTAssertEqual(value, expectValue);
- 8. Test Target Test Target: - Test code - Resources Automatically included in new project Existing projects can add test targets
- 9. Running Test Command+U Buttons in source editor sidebar Buttons in Test Navigator
- 11. Viewing Result Test Navigator Issue Navigator
- 12. Viewing Result Test Navigator Issue Navigator Source Editor
- 13. Viewing Result Test Navigator Issue Navigator Source Editor Test Report
- 16. Create Model
- 17. Create Service
- 18. Write Test Case
- 19. Implement Method Write code to implement methods. Check if test cases are passed
- 21. Asynchronous Testing Create Expectation Object: - XCTestExpectation *expectation = [self expectationWithDescription:@"Load Data"]; XCTestCase waits for Expectations to “Fullfill” - (void)waitForExpectationsWithTimeout:(NSTimeInterval)timeout handler:(nullable XCWaitCompletionHandler)handler; Handle when finishing asynchronous tasks: - [expectation fulfill];
- 24. Write Test case
- 25. Implement method Write code to implement methods. Check if test cases are passed
- 27. Performance Testing How to measure app performance? How to find which part causes performance problem? => Performance Testing.
- 28. Measuring Performance Test code block: - (void)measureBlock:(void (^)(void))block; Runs code block 10 time Measures time Results show in Xcode
- 29. Performance Testing Setting Baselines Setting Standard Deviation (STDDEV)
- 30. Setting Baselines Baselines is Average run time Detect Regressions: - Fail if (Baselines Average)>0.1 seconds and >10% Baselines are stored in sources Baselines are per-device configuration: - Device model, CPU, OS
- 31. Setting Baseline No Baseline Set Baseline
- 32. Setting Baselines Normal case (Baseline 1s) Error Case (Baseline 1s)
- 33. Setting Baseline Baselines are not enough
- 34. Setting Standard Deviation (STDDEV) Fail if (STDDEV)>0.1 seconds and >10%
- 35. Standard Deviation Why STDDEV too big? - File I/O, Network I/O? - Initialization? - Does it do the same work each time it's called? - System busy?
- 36. Profiling Test Investigate functions’ performance
- 38. Performance Test
- 39. Summary Why Testing? Beginning Unit Test Asynchronous Testing Performance Testing
- 40. Reference WWDC’s video: https://developer.apple.com/videos/play/wwdc2014/414/ Unit Test Sample: https://developer.apple.com/library/mac/samplecode/UnitTests/History/History. html#//apple_ref/doc/uid/DTS40011742-RevisionHistory-DontLinkElementID_1 Udacity Course: https://www.udacity.com/course/viewer#!/c-cs212/l- 48688918/m-48276959 Demo Source: https://www.dropbox.com/s/mhjpllmxugyf02c/UnitTest.zip?dl=1
- 41. QA? 1. How to implement UITest? - Checkout apple’s Sample app: https://developer.apple.com/library/mac/samplecode/UnitTests/History/Hist ory.html#//apple_ref/doc/uid/DTS40011742-RevisionHistory- DontLinkElementID_1 - Checkout this WWDC session: https://developer.apple.com/videos/play/wwdc2015/406/
- 42. Assignment Write a sample app using UnitTest - Which test cases should we have to cover?