use rustc_data_structures::small_vec::SmallVec;
pub type SmallVector<T> = SmallVec<[T; 1]>;
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_len() {
let v: SmallVector<isize> = SmallVector::new();
assert_eq!(0, v.len());
assert_eq!(1, SmallVector::one(1).len());
assert_eq!(5, SmallVector::many(vec![1, 2, 3, 4, 5]).len());
}
#[test]
fn test_push_get() {
let mut v = SmallVector::new();
v.push(1);
assert_eq!(1, v.len());
assert_eq!(1, v[0]);
v.push(2);
assert_eq!(2, v.len());
assert_eq!(2, v[1]);
v.push(3);
assert_eq!(3, v.len());
assert_eq!(3, v[2]);
}
#[test]
fn test_from_iter() {
let v: SmallVector<isize> = (vec![1, 2, 3]).into_iter().collect();
assert_eq!(3, v.len());
assert_eq!(1, v[0]);
assert_eq!(2, v[1]);
assert_eq!(3, v[2]);
}
#[test]
fn test_move_iter() {
let v = SmallVector::new();
let v: Vec<isize> = v.into_iter().collect();
assert_eq!(v, Vec::new());
let v = SmallVector::one(1);
assert_eq!(v.into_iter().collect::<Vec<_>>(), [1]);
let v = SmallVector::many(vec![1, 2, 3]);
assert_eq!(v.into_iter().collect::<Vec<_>>(), [1, 2, 3]);
}
#[test]
#[should_panic]
fn test_expect_one_zero() {
let _: isize = SmallVector::new().expect_one("");
}
#[test]
#[should_panic]
fn test_expect_one_many() {
SmallVector::many(vec![1, 2]).expect_one("");
}
#[test]
fn test_expect_one_one() {
assert_eq!(1, SmallVector::one(1).expect_one(""));
assert_eq!(1, SmallVector::many(vec![1]).expect_one(""));
}
}