Module test_utils 

Headless test utilities for unit-testing TUI closures. Headless testing utilities.

TestBackend renders a UI closure to an in-memory buffer without a real terminal. EventBuilder constructs event sequences for simulating user input. Together they enable snapshot and assertion-based UI testing.

Structs

EventBuilder

Builder for constructing a sequence of input Events.

FrameRecord

Snapshot of a single rendered frame, captured by TestBackend::record_frames.

PtyBackendpty-test

Drives the real crate::run flush pipeline into an in-process byte sink, so escape-code / color-depth / image-protocol output is asserted end-to-end — the byte/protocol tier that TestBackend’s buffer-only model deliberately cannot reach (see tests/visual_snapshots.rs).

PtyFramepty-test

Raw bytes emitted for a single rendered frame by PtyBackend.

TestBackend

Headless rendering backend for tests.

TestSequence

Builder returned by TestBackend::sequence.