End-to-end Testing with Cypress Series: 05 Isolate Test State @TestDouble
End-to-end Testing with Cypress Series: 05 Isolate Test State  @TestDouble
Uploaded March 2022 | Updated September 2026, 2 weeks ago
In this video, learn how to isolate test state by adding another real-world, happy path end-to-end test with Cypress to the demo application. After watching this video, you will be able to prevent sharing persisted end-to-end test state and manage setup code for your own happy path tests.

You will also:
- learn the dangers of saving persisted state between different tests
- run specific tests with `it.only`
- clear text inputs with the Cypress `clear` command
- write explicit assertions with the Cypress `should` command

Chapters
00:00 Intro
00:09 Recap of previous video
00:25 Learning goals for this video
00:49 Reminder instructions for running demo app and Cypress test suite
01:00 How to identify a new happy path end-to-end test for demo app
01:16 Demo app backend server clears state on boot
01:24 Dangers of sharing persisted state between end-to-end tests
01:51 Isolating Cypress test state from other end-to-end tests
01:59 How to add new happy path end-to-end test with `it.only`
02:19 How to fill in setup code for new happy path test
02:58 Save file to verify setup code runs in the new test
03:03 Start adding actual test code to the happy path end-to-end test
03:26 Using Cypress’ `clear` command to clear a text input
03:43 How to add test assertions to the new happy path end-to-end test
03:56 Using Cypress’ `should` command for explicit assertions
04:26 Link for other Cypress assertion commands
04:31 Save file to verify new happy path test runs successfully
04:40 Change `it.only` back to `it` so all end-to-end tests run
04:46 Recapping what you learned
05:04 Conclusion and next video teaser

Find out more about Test Double at link.testdouble.com/more-info
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End-to-end Testing with Cypress Series: 05 Isolate Test State

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