The test runner viewport should grow and shrink as necessary

[nfachan]

Use Cases

Initially, when there isn't much to output, or when running just a few tests, the viewport shouldn't grow too large.

During a large test run, the viewport should grow to take up the whole screen as necessary, or maybe the whole screen minus one lines.

At the end of a long test run, the viewport should shrink down again.

Acceptance Criteria

• [ ] The viewport should be a small as possible at any point.
• [ ] However, to satisfy #392, the bottom of the viewport should never move up from the bottom of the screen. In these cases, the viewport can contain some extra blank lines.
• [ ] When tests complete, that provides an opportunity to shrink the viewport.

Implementation Considerations

Definition of Done

• [ ] CHANGELOG.md updated.
• [ ] Documentation in doc/book/head updated.
• [ ] Issue is in the correct milestone.

[bobbobbio]

To be clear, this must depend the ability to resize the inline viewport https://github.com/ratatui/ratatui/issues/984

[jkelleyrtp]

fwiw if you use the crossterm backend you can just swap the terminal instance out with a new one of a different viewport size which will mimic resizing the viewport

[nfachan]

fwiw if you use the crossterm backend you can just swap the terminal instance out with a new one of a different viewport size which will mimic resizing the viewport

Thanks for the idea!