The document discusses testing strategies for delivering React apps with confidence. It recommends following a testing pyramid approach with static checks, unit tests, integration tests and end-to-end (E2E) tests. Static checks and unit tests should be done most, followed by integration and E2E tests. This comprehensive testing approach helps ensure new features work as expected, regressions are avoided, and bugs don't occur, saving time and money. Key tools mentioned for testing include Jest, React Testing Library and Cypress.

1. Delivering React App With Confidence
Testing pyramid
18.08.2021

2. ● New features works as expected
● There is no bugs
● There is no regressions
What we're expecting when we make a release?

3. ● Clients hates bugs
● Refactoring is painful
● Regressions can have high cost
● And most obviously, testing saves money and time
Why we should write tests?

4. Testing Pyramid
by Mike Cohn
Unit tests
E2E
Integration
Test

5. Testing Trophy
by Kent C. Dodds
E2E
Integration
Tests
Unit Test
Static Checks

6. ● Static Checks - Typescript, EsLint, Flow
● Unit Tests - Jest
● Integration Tests - Jest + React Testing Library
● End To End Tests - Cypress
Tools
What we can use to write and run out tests?

7. “Write tests. Not too many.
Mostly integration.”
Guillermo Rauch

8. Thank You!
georgii.shestakov@7peakssoftware.com
Seven Peaks
88 Ratchadapisek Road The PARQ (West Wing Unit 8-13, 7th
Floor) Khlong Toei, Bangkok 10110
+66 02 026 3292 | www.sevenpeakssoftware.com
Georgii Shestakov