Struct TestBuffer 

pub struct TestBuffer {
    pub buffer: Buffer,
}

A buffer wrapper for testing component render output.

Fields

buffer: Buffer

Implementations

impl TestBuffer

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

Creates a test buffer of the given size.

pub fn render<C: Component>(&mut self, component: &C)

Renders a component into this buffer.

pub fn assert_text(&self, x: u16, y: u16, expected: &str)

Asserts that the cell at (x, y) contains the expected text.

pub fn assert_line(&self, y: u16, expected: &str)

Asserts that a line starting from x=0 matches the expected text. Spaces at the end of rendered output are trimmed before comparison.

pub fn assert_lines(&self, expected: &[&str])

Asserts entire buffer lines match expected strings (trailing spaces trimmed).

pub fn cell_fg(&self, x: u16, y: u16) -> Option<Color>

Returns the foreground color of the cell at (x, y).

pub fn cell_bg(&self, x: u16, y: u16) -> Option<Color>

Returns the background color of the cell at (x, y).