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use std::fmt;
use core::{Matcher, Join};
pub struct BeOk<E> {
expected: Option<E>,
}
pub fn be_ok<E>() -> BeOk<E> {
BeOk { expected: None }
}
impl<E> BeOk<E> {
pub fn value(mut self, v: E) -> BeOk<E> {
self.expected = Some(v);
self
}
}
impl<A, E, T> Matcher<Result<A, T>, E> for BeOk<E>
where
A: PartialEq<E> + fmt::Debug,
E: fmt::Debug,
T: fmt::Debug {
fn failure_message(&self, join: Join, actual: &Result<A, T>) -> String {
format!("expected {} be Ok, got <{:?}>", join, actual)
}
fn matches(&self, actual: &Result<A, T>) -> bool {
::utils::is_some_value(actual.as_ref().ok(), self.expected.as_ref())
}
}
pub struct BeErr<E> {
expected: Option<E>,
}
pub fn be_err<E>() -> BeErr<E> {
BeErr { expected: None }
}
impl<E> BeErr<E> {
pub fn value(mut self, v: E) -> BeErr<E> {
self.expected = Some(v);
self
}
}
impl<A, E, T> Matcher<Result<T, A>, E> for BeErr<E>
where
A: PartialEq<E> + fmt::Debug,
E: fmt::Debug,
T: fmt::Debug {
fn failure_message(&self, join: Join, actual: &Result<T, A>) -> String {
format!("expected {} be Err, got <{:?}>", join, actual)
}
fn matches(&self, actual: &Result<T, A>) -> bool {
::utils::is_some_value(actual.as_ref().err(), self.expected.as_ref())
}
}
#[cfg(test)]
mod tests {
use super::{be_ok, be_err};
use core::Matcher;
fn ok_result(value: u32) -> Result<u32, &'static str> {
Ok(value)
}
fn err_result(value: &'static str) -> Result<u32, &'static str> {
Err(value)
}
#[test]
fn be_ok_matches_ok() {
assert!(be_ok().matches(&ok_result(5)));
}
#[test]
fn be_ok_value_matches_ok() {
assert!(be_ok().value(1).matches(&ok_result(1)));
}
#[test]
#[should_panic]
fn be_ok_matches_err_should_panic() {
assert!(be_ok().matches(&err_result("error")));
}
#[test]
#[should_panic]
fn be_ok_value_matches_ok_should_panic() {
assert!(be_ok().value(1).matches(&ok_result(2)));
}
#[test]
#[should_panic]
fn be_ok_value_matches_err_should_panic() {
assert!(be_ok().value(1).matches(&err_result("error")));
}
#[test]
fn be_err_matches_err() {
assert!(be_err::<&'static str>().matches(&err_result("error")));
}
#[test]
fn be_err_value_matches_err() {
assert!(be_err().value("error").matches(&err_result("error")));
}
#[test]
#[should_panic]
fn be_err_matches_ok_should_panic() {
assert!(be_err::<&'static str>().matches(&ok_result(1)));
}
#[test]
#[should_panic]
fn be_err_value_matches_err_should_panic() {
assert!(be_err().value("error").matches(&err_result("error!")));
}
#[test]
#[should_panic]
fn be_err_value_matches_ok_should_panic() {
assert!(be_err().value("error").matches(&ok_result(1)));
}
}