Struct TuiTestBackend 

pub struct TuiTestBackend {
    pub width: u16,
    pub height: u16,
    /* private fields */
}

In-memory TUI test backend. Renders widgets to a buffer for assertions.

Fields

width: u16

Width in columns.

height: u16

Height in rows.

Implementations

impl TuiTestBackend

pub fn new(width: u16, height: u16) -> Self

Create a new test backend with dimensions.

pub fn with_deterministic(self, enabled: bool) -> Self

Enable/disable deterministic mode.

pub fn clear(&mut self)

Clear the buffer.

pub fn get(&self, x: u16, y: u16) -> Option<&TuiCell>

Get cell at position.

pub fn set(&mut self, x: u16, y: u16, cell: TuiCell)

Set cell at position.

pub fn draw_text(&mut self, x: u16, y: u16, text: &str, fg: (u8, u8, u8))

Draw text at position.

pub fn render<F: FnOnce(&mut Self)>(&mut self, f: F)

Render a frame using provided closure.

pub fn extract_row(&self, y: u16) -> String

Extract text from a row.

pub fn extract_text_at(&self, x: u16, y: u16) -> String

Extract text at position (reads until whitespace or boundary).

pub fn extract_region( &self, x: u16, y: u16, width: u16, height: u16, ) -> Vec<String>

Extract text in region.

pub fn to_string_plain(&self) -> String

Convert buffer to string representation.

pub fn frame_count(&self) -> u64

Get current frame count.

pub fn metrics(&self) -> &RenderMetrics

Get render metrics.

pub fn snapshot(&self) -> TuiSnapshot

Create a snapshot of current state.

Trait Implementations

impl Debug for TuiTestBackend

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.