Test Isolation
What is Test Isolation?
Cypress will start each test with a clean test slate by restoring and clearing all:
- aliases
- clock mocks
- intercepts
- spies
- stubs
- viewport changes
In addition to a clean test slate, Cypress also believes in running tests in a clean browser context such that the application or component under test behaves consistently when run. This behavior is described as testIsolation
Test Isolation in End-to-End Testing
Test Isolation Enabled
When test isolation is enabled, Cypress resets the browser context before each test by:
- clearing the dom state by visiting
about:blank - clearing cookies in all domains
- clearing localStorage in all domains
- clearing sessionStorage in all domains
Additionally, the cy.session() command will inherit this configuration and will clear the page and current browser context when establishing a browser session