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#![no_std]
#[cfg(test)]
extern crate std;
#[doc(hidden)]
pub extern crate core as __core;
#[macro_export]
macro_rules! assert_has_not_been_called {
() => {
assert_has_not_been_called!("assertion failed: has_run == false");
};
($($arg:tt)+) => {{
fn assert_has_not_been_called() {
use $crate::__core::sync::atomic::{AtomicBool, Ordering};
static CALLED: AtomicBool = AtomicBool::new(false);
let called = CALLED.swap(true, Ordering::Relaxed);
assert!(called == false, $($arg)+);
}
assert_has_not_been_called();
}};
}
#[test]
fn test_run_once() {
fn init() {
assert_has_not_been_called!();
}
init();
}
#[test]
fn test_run_once_different_fns() {
fn init1() {
assert_has_not_been_called!();
}
fn init2() {
assert_has_not_been_called!();
}
init1();
init2();
}
#[test]
#[should_panic]
fn test_run_twice() {
fn init() {
assert_has_not_been_called!();
}
init();
init();
}
#[test]
fn test_hygiene1() {
fn init() {
assert_has_not_been_called!();
#[allow(dead_code)]
fn assert_has_not_been_called() {}
}
init();
}
#[test]
fn test_hygiene2() {
fn init() {
assert_has_not_been_called!();
#[allow(dead_code)]
static CALLED: i32 = 42;
}
init();
}