Struct MapEnvSource 

pub struct MapEnvSource { /* private fields */ }

Map-backed implementation for tests. Built from any IntoIterator<Item=(K,V)> (including HashMap<K, V> via the From impl below) or fluently via MapEnvSource::with.

Implementations

impl MapEnvSource

pub fn new() -> Self

Create an empty source. Use MapEnvSource::with to seed entries fluently, or MapEnvSource::set for the mutable form.

pub fn with<K: Into<String>, V: Into<String>>(self, k: K, v: V) -> Self

Insert (k, v) and return self so calls can chain.

pub fn set<K: Into<String>, V: Into<String>>(&mut self, k: K, v: V) -> &mut Self

Insert (k, v) in place. Returns &mut self for chained mutation.

Trait Implementations

impl Clone for MapEnvSource

fn clone(&self) -> MapEnvSource

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MapEnvSource

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

Formats the value using the given formatter.

impl Default for MapEnvSource

fn default() -> MapEnvSource

Returns the “default value” for a type.

impl EnvSource for MapEnvSource

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

Look up name and return its value, or None if unset.

fn vars(&self) -> Vec<(String, String)>

Snapshot every (name, value) pair this source can enumerate.

impl<K, V> From<HashMap<K, V>> for MapEnvSource

where K: Into<String>, V: Into<String>,

fn from(map: HashMap<K, V>) -> Self

Converts to this type from the input type.