Struct MapEnvironment 

pub struct MapEnvironment {
    pub vars: BTreeMap<String, String>,
    pub terminal: bool,
    pub size: Option<(usize, usize)>,
    pub windows: bool,
    pub cell_pixels: Option<(u16, u16)>,
}

A deterministic environment for tests and CI.

Fields

vars: BTreeMap<String, String>

terminal: bool

size: Option<(usize, usize)>

windows: bool

cell_pixels: Option<(u16, u16)>

The cell size in pixels the terminal reports, if any.

Implementations

impl MapEnvironment

pub fn new() -> Self

An empty, non-terminal environment.

pub fn tty() -> Self

An empty terminal environment.

pub fn var(self, name: &str, value: &str) -> Self

Set a variable.

pub fn terminal(self, terminal: bool) -> Self

Set the terminal flag.

pub fn size(self, width: usize, height: usize) -> Self

Set the reported size.

pub fn windows(self, windows: bool) -> Self

Mark the environment as Windows.

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

Set the cell size in pixels the terminal reports.

Trait Implementations

impl Clone for MapEnvironment

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MapEnvironment

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

Formats the value using the given formatter.

impl Default for MapEnvironment

fn default() -> Self

Returns the “default value” for a type.

impl Environment for MapEnvironment

fn var(&self, name: &str) -> Option<String>

An environment variable, None when unset or not Unicode.

fn is_terminal(&self) -> bool

Whether stdout is a terminal.

fn size(&self) -> Option<(usize, usize)>

The terminal size in cells (width, height), when known.

fn is_windows(&self) -> bool

Whether this is Windows (core assumes truecolor there).

fn cell_pixels(&self) -> Option<(u16, u16)>

The size of one cell in pixels (width, height), when the terminal reports its window size in pixels. Used by GraphicsEnvironment.