This is a small repo to demonstrate a bug that occurs in a Cypress test when using an ag-grid editable grid with the stopEditingWhenGridLosesFocus flag on Chromium.

This is a toy app to expose the bug which was really discovered in a proprietary codebase.

1. Clone this repo.
2. Run yarn to install dependencies
3. Run yarn e2e --watch to run Cypress in watch mode.
4. See a successful running test (it loads a table of sample data, asserts the values, changes two of the values with text that has multiple characters, and asserts that the new values are accepted).
5. Make a trivial change to app.spec.ts (like adding a space at the end of a line).
6. See that the second run will fail (only the last characters of the new values will be visible).

The bug manifests under these conditions:

• Hot reload
• On Electron 87, Chrome 89, and Edge 89
• With stopEditingWhenGridLosesFocus used in ag-grid

The bug does not manifest under these conditions:

• Initial execution
• After hitting the replay button
• On Firefox 86 (I have not tested other browsers)
• Without the stopEditingWhenGridLosesFocus flag

This seems to be the same general problem that was reported in cypress-io/cypress#5394, but that was apparently fixed. I don't know if this demonstrates a regression, or if it was a previously-unknown corner case.

This issue was reported both to Cypress and ag-grid (paywall).