Real-World TypeScript Unit Testing

سرفصل های دوره

Create unit tests for real world typescript system with few modules using vitest or jest

1. Getting started

1. Welcome to my course

2. Setup simple unit test project

3. Setup simple unit test project.html

4. Create your first unit test

5. Create your first unit test.html

6. Coding Excercise 1

7. Coding Excercise 1 solution

2. Testing concepts and tools

1. Section Intro

2. What is testing

3. What is testing.html

4. Unit test vs integration test vs e2e test

5. Unit test vs integration test vs e2e test.html

6. Side effects

7. Side effects.html

8. Properties of a good unit test

9. Properties of good unit test.html

10. Manual test vs automatic test

11. Manual test vs automatic test.html

12. Motivation for automatic testing

13. Motivation for automatic testing.html

14. Should you test all your code

15. Should you test all your code.html

16. Unit testing best practices

17. Unit testing best practices.html

18. Unit testing modes

19. Unit testing modes.html

20. Unit testing framework vitest and jest

21. Unit testing framework vitest and jest.html

22. Vitest

23. Vitest.html

24. Jest

25. Jest.html

3. Task queue manager- the system we will unit test

1. Section Intro

2. Simple system UI

3. Simple system UI.html

4. Block diagram

5. Block diagram.html

6. Sequence diagram

7. Sequence diagram.html

8. Source code

9. Source code.html

10. Motivation

11. Motivation.html

12. Specification

13. Specification.html

14. Project structure

15. Project structure.html

4. Unit test of pure logic code - TaskQueue

1. Section intro

2. Directory final setup

3. Unit test of an object or a class

4. Unit test of an object or a class.html

5. Choosing the first module to unit test

6. Choosing the first module to unit test.html

7. Setup unit test for TaskQueue

8. Setup unit test for TaskQueue.html

9. TaskQueue - test for empty queue

10. TaskQueue - test for empty queue.html

11. TaskQueue - test for non empty queue

12. TaskQueue - test for non empty queue.html

13. Fix the test using beforeEach and add clear function to TaskQueue

14. Fix the test using beforeEach and add clear function.html

15. Code at section end.html

16. Coding Excercise 2

17. Coding Excercise 2 - solution

5. Code coverage

1. Section intro

2. Code coverage meaning and motivation

3. Code coverage meaning and motivation.html

4. Do we need 100% code coverage

5. Do we need 100% code coverage.html

6. Inatallation

7. Inatallation.html

8. Usage

9. Usage.html

10. Coding Excercise 3

11. Coding Excercise 3 - solution

6. Unit testing of pure logic code - TaskDispatcher

1. Section intro

2. Choose the second module to unit test

3. Choose the second module to unit test.html

4. Dive into TaskDispatch code

5. Dive into TaskDispatch code.html

6. Prepare the test file

7. Prepare the test file.html

8. Unit test empty map - dispatch throw

9. Unit test empty map - dispatch throw.html

10. Unit test task not found - dispatch throw

11. Unit test task not found - dispatch throw.html

12. Function type as function argument issue

13. Function type as function argument issue.html

14. Refactor types

15. Refactor types.html

16. Test dispatch status is ok

17. Test dispatch status is ok.html

18. Test reveal bug in dispatch - debug and fix

19. Test reveal bug in dispatch - debug and fix.html

20. Test dispatch result is ok for add function

21. Test dispatch result is ok for add function.html

22. Check code coverge

23. Check code coverge.html

24. How to filter tests

25. How to filter tests.html

26. Code at section end.html

27. Coding Excercise 4

28. Coding Excercise 4 - solution

7. Introduction to unit testing of code with side effects and module interaction

1. Section intro

2. What is a side effect

3. What is a side effect.html

4. What is a mock

5. What is a mock.html

6. Motivation for mocks

7. Motivation for mocks.html

8. API for mocks

9. API for mocks.html

10. Modules with side effects and module interaction

11. Modules with side effects and module interaction.html

12. Solitary (isolated) test vs sociable test

13. Solitary (isolated) test vs sociable test.html

8. Unit test of persist with side effect

1. Unit test using jsdom

2. Unit test using jsdom.html

3. Unit test with console.log and spyOn()

4. Unit test with console.log and spyOn().html

5. Unit test with Storage.prototype and spyOn()

6. Unit test with Storage.prototype and spyOn().html

7. Code at section end.html

8. Coding Excercise 5

9. Coding Excercise 5 - solution

9. Unit test of TaskQueue with persist module interaction

1. Unit test using sociable test

2. Unit test using sociable test.html

3. Motivation for unit test using isolated (solitary) test

4. Motivation for unit test using isolated (solitary) test.html

5. Using mock() and fn() for persist using isolated (solitary) test for TaskQueue

6. Using mock() and fn() for persist using isolated (solitary).html

7. Refactor taskQueue to a class

8. Refactor taskQueue to a class.html

9. Add persist related test cases and use sociable test for TaskQueue

10. Add persist related test cases and use sociable test for TaskQueue.html

11. Use isolated (solitary) test for added test cases

12. Use isolated (solitary) test for added test cases.html

13. Should you use sociable or isolated (solitary) test

14. Should you use sociable or isolated (solitary) test.html

15. Code at section end.html

16. Coding Excercise 6

17. Coding Excercise 6 - solution

10. Unit test of TaskScheduler with fake timer and module interaction

1. Test plan

2. Test plan.html

3. Use fake timers in unit test

4. Use fake timers in unit test.html

5. Test for result and add callback in TaskScheduler

6. Test for result and add callback in TaskScheduler.html

7. Finish the unit test

8. Finish the unit test.html

9. Summary unit test of TaskScheduler

10. Code at section end.html

11. Coding Excercise 7

12. Coding Excercise 7 - solution

11. Introduction to frontend unit testing

1. Section intro - Where are we now and how to continue

2. Where are we now and how to continue.html

3. Dom unit testing tools

4. Dom unit testing tools.html

5. Download and invoke the UI

6. Download and invoke the UI.html

7. Code at section end.html

12. Frontend unit testing with jsdom

1. Jsdom setup and simple unit test for h1 text

2. Jsdom setup and simple unit test for h1 text.html

3. Unit test for buttons count and text

4. Unit test for buttons count and text.html

5. Elegant unit test for buttons using enum and loop

6. Elegant unit test for buttons using enum and loop.html

7. Powerful unit test for enqueue add(1,2) button

8. Powerful unit test for enqueue add(1,2) button.html

9. Unit test with spyOn to test queue length buttton

10. Unit test with spyOn to test queue length buttton.html

11. Use spyOn to test for failure to appear in the UI

12. Use spyOn to test for failure to appear in the UI.html

13.1 Code at lesson end.html

13. More jsdom unit test to get 100% coverage

14. More jsdom unit test to get 100% coverage.html

15. Code at section end.html

16. Coding Excercise 8

17. Coding Excercise 8 - solution

13. Frontend unit testing with dom testing library

1. Introduction and motivation for testing library

2. Introduction and motivation for testing library.html

3. Setup for dom testing library

4. Setup for dom testing library.html

5. Flexible unit test for heading using role and getByRole

6. Flexible unit test for heading using role and getByRole.html

7. Use setup.tc for an extended matcher like toBeInTheDocument

8. Use setup.tc for an extended matcher.html

9. Button role and getAllByRole for a flxible unit test

10. Button role and getAllByRole for a flxible unit test.html

11. userEvent , getByText and status role in unit test

12. userEvent , getByText and status role in unit test.html

13. Repalce sleep with smart wait using waitFor

14. Repalce sleep with smart wait using waitFor.html

15. Unit test for failure to appear in the UI after task has failed

16. Unit test for failure to appear in the UI after task has failed.html

17. Unit test for empty string to appear in the UI if task is not dispatched

18. Unit test for empty string to appear in the UI.html

19. Unit test with console.log and console.error

20. Unit test with console.log and console.error.html

21. Section summary

22. Code at section end.html

23. Coding Excercise 9

24. Coding Excercise 9 - solution

14. More requirements - code changes - unit test

1. Section intro

2. Section intro.html

3. Add is scheduler started in logic and render to the UI

4. Add is scheduler started in logic and render to the UI.html

5. Update test to get 100% coverage

6. Update the test to get 100% coverage.html

7. Render queue length

8. Render queue length.html

9. Support async dispatch function

10. Support async dispatch function.html

11. Faketimer problem with async dispatch solved with flushPromises

12. Faketimer problem with async dispatch.html

13. Unit test of async dispatch functions add and getPosts

14. Unit test of async dispatch functions add and getPosts.html

15. Add enqueGetPosts in the UI + unit test + ad hoc vitest fix

16. Add enqueGetPosts in the UI + unit test + ad hoc vitest fix.html

17. Task overlapping problem

18. Task overlapping problem.html

19. Implement step by step a real timer test for task overlapping

20. Implement step by step a real timer test for task overlapping.html

21. Final task overlapping test + source code

22. Final task overlapping test + source code.html

23. Add action with result to the UI

24. Add action with result to the UI.html

25. Add try catch in dispatch

26. Add try catch in dispatch.html

27. Fix save on empty array for dequeue

28. Fix save on empty array for dequeue.html

29. Code at section end.html

30. Coding Excercise 10

31. Coding Excercise 10 - solution

15. Advanced typescript for better code

1. Section intro

2. Section intro.html

3. The problems with string as action type and possible solutions

4. The problems with string as action type and possible solutions.html

5. Union of strings as action type

6. Union of strings as action type.html

7. Enum as action type

8. Enum as action type.html

9. The problematics of working with type any

10. The problematics of working with type any.html

11. Use type unknown instead of type any

12. Use type unknown instead of type any.html

13. From unknown type to the correct type using validation

14. From unknown type to the correct type using validation.html

15. Unit test for code with unknown

16. Unit test for code with unknown.html

17. Motivation for generic task queue manager

18. Motivation for generic task queue manager.html

19. Design of generic storage using polymorphism , inheritance and interface

20. Design of generic storage using polymorphism , inheritance and interface.html

21. Implement Persist class and IPersistStorage interface

22. Implement Persist class and IPersistStorage interface.html

23. Implement class LocalStoragePersist and check with unit test

24. Implement class LocalStoragePersist and check with unit test.html

25. Refactor and use queue length getter

26. Refactor and use queue length getter.html

27. Code at section end.html

28. Coding Excercise 11

29. Coding Excercise 11 - solution

16. React UI Unit testing with react testing library - RTL

1. Section intro

2. Download react ui and invoke vanilla or react ui

3. Download react ui and invoke vanilla or react ui.html

4. Tools to test react applications - mostly RTL

5. Tools to test react applications - mostly RTL.html

6. Use jsdom to test that a text exists on react ui

7. Use jsdom to test that a text exists on react ui.html

8. Use the RTL to create the first react unit test

9. Use the RTL to create the first react unit test.html

10. More unit tests using the RTL

11. More unit tests using the RTL.html

12. Unit test with document and RTL

13. Unit test with document and RTL.html

14. Complete the remaining tests using the RTL

15. Complete the remaining tests using the RTL.html

16. Fix react bug using unit test

17. Fix react bug using unit test.html

18. Use code coverage to remove unused code

19. Use code coverage to remove unused code.html

20. Section summary

21. Code at section end.html

22. Coding Excercise 12

23. Coding Excercise 12 - solution

17. Unit tests with Jest

1. Section intro

2. What is jest and its API relation with vitest

3. What is jest and its API relation with vitest.html

4. Create jest setup

5. Create jest setup.html

6. Add watch mode

7. Add watch mode.html

8. Add coverage test

9. Add coverage test.html

10. Configure vitest to handle only the test directory

11. Configure vitest to handle only the test directory.html

12. Tweak tests with jest to compile

13. Tweak tests with jest to compile.html

14. Fix test with jest add jsdom to jest.config.ts

15. Fix test with jest add jsdom to jest.config.ts.html

16. Fix test with jest add matchers

17. Fix test with jest add matchers.html

18. Fix test with jest regarding toContain

19. Fix test with jest regarding toContain.html

20. Fix test with jest dayjs problem - add esModuleInterop true in tsconfig.js

21. Fix test with jest dayjs problem.html

22. Fix test with jest persist mock problems -- add clearMocks and replace mock()

23. Fix test with jest persist mock problems.html

24. Use testMatch in jest.config.ts for better test file filtering

25. Use testMatch in jest.config.ts for better test file filtering.html

26. Fix test with jest problem with fetch -- replace with axios in src

27. Fix test with jest problem with fetch.html

28. Build the comparison between jest and vitest

29. Build the comparison between jest and vitest.html

30. Summary of the comparison between jest and vitest

31. Code at section end.html

32. Coding Excercise 13

33. Coding Excercise 13 - solution

18. Where to go from here

1. Here we are - course summary

2. Where to go from here - task queue manager

3. Where to go from here - testing

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