Function xpct::iter_map

pub fn iter_map<'a, In, Out, IntoIter>(
    func: impl Fn(In) -> Out + 'a
) -> Matcher<'a, IntoIter, IterMap<'a, In, Out, IntoIter::IntoIter>>where
    In: 'a,
    Out: 'a,
    IntoIter: IntoIterator<Item = In> + 'a,

Infallibly map each value of an iterator by applying a function to it.

This does the same thing as Assertion::iter_map.

This matcher always succeeds, even when negated. Therefore negating it has no effect.

Examples

use xpct::{be_some, every, expect, iter_map};

let items = vec![Some("foo"), Some("bar")];

let output: Vec<&str> = expect!(&items)
    .to(iter_map(Option::as_deref))
    .to(every(be_some))
    .into_inner();