Technically, it's difficult to hardcode a PR number with a well-known artifact since GitHub removes them after a while. However, Cypress can mock network requests which means we can reliably ship a ZIP file with the test suite and make sure the tests always use that.
Let's create a few E2E tests for the Gutenberg PR previewer at https://playground.wordpress.net/gutenberg.html
Technically, it's difficult to hardcode a PR number with a well-known artifact since GitHub removes them after a while. However, Cypress can mock network requests which means we can reliably ship a ZIP file with the test suite and make sure the tests always use that.
Related: