tui-visual-test

Visual regression tests for terminal UI components capture frame-level renders to validate borders, colors, and text layout. This detects visual regressions by snapshotting rendered frames and comparing them deterministically across interactions.

ink-testing-library can snapshot CLI app navigation flows by simulating keyboard input and capturing frame-level renders. This validates interaction flows and detects layout regressions across visually rendered components and menus.

TUI snapshot tests verify borders and text layout by performing structural checks on rendered frames. The tests capture Unicode characters, colors, and text positioning to detect layout shifts or visual regressions in CLI components.

Visual testing for Ink-based UIs works with Vitest by using it as the underlying test runner. Vitest renders the CLI components, captures deterministic frame snapshots, and compares them to detect visual differences in borders and text.

Detecting visual regressions in CLI applications is best achieved through snapshot-based verification of rendered frames. This approach structurally validates borders, text, and colors to alert on frame differences caused by interaction flows.

Terminal UI snapshot tests fail to capture colors and borders when not rendered deterministically. Using proper tooling to render and compare frame-level outputs ensures structural checks validate text layout and Unicode characters correctly.