grassrootseconomics/openethereum
5
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

[ci skip] style fixes, multipart add test

Browse Source
This commit is contained in:
Nikolay Volf 2016-02-26 15:56:55 +03:00
parent f29417eea9
commit e95538f3ec
1 changed files with 28 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
util/src/uint.rs
View File

@ -1468,5 +1468,26 @@ mod tests {
fn display_uint_zero() { fn display_uint_zero() {
assert_eq!(format!("{}", U256::from(0)), "0"); assert_eq!(format!("{}", U256::from(0)), "0");
} }
#[test]
fn u256_multi_adds() {
let (result, _) = U256([0, 0, 0, 0]).overflowing_add(U256([0, 0, 0, 0]));
assert_eq!(result, U256([0, 0, 0, 0]));
let (result, _) = U256([0, 0, 0, 1]).overflowing_add(U256([0, 0, 0, 1]));
assert_eq!(result, U256([0, 0, 0, 2]));
let (result, overflow) = U256([0, 0, 2, 1]).overflowing_add(U256([0, 0, 3, 1]));
assert_eq!(result, U256([0, 0, 5, 2]));
assert!(!overflow);
let (_, overflow) = U256([::std::u64::MAX, ::std::u64::MAX, ::std::u64::MAX, ::std::u64::MAX])
.overflowing_add(U256([::std::u64::MAX, ::std::u64::MAX, ::std::u64::MAX, ::std::u64::MAX]));
assert!(overflow);
let (_, overflow) = U256([0, 0, 0, ::std::u64::MAX]).overflowing_add(U256([0, 0, 0, ::std::u64::MAX]));
assert!(overflow);
}
} }