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Tests for Builtin.

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This commit is contained in:
Gav Wood 2016-01-05 19:23:40 +01:00
parent 6585910c2a
commit e98452b0c7
1 changed files with 33 additions and 1 deletions
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34
src/builtin.rs
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@ -20,7 +20,9 @@ impl Builtin {
/// Create a new object from a builtin-function name with a linear cost associated with input size. /// Create a new object from a builtin-function name with a linear cost associated with input size.
pub fn from_named_linear(name: &str, base_cost: usize, word_cost: usize) -> Option<Builtin> { pub fn from_named_linear(name: &str, base_cost: usize, word_cost: usize) -> Option<Builtin> {
new_builtin_exec(name).map(|b| { new_builtin_exec(name).map(|b| {
let cost = Box::new(move|s: usize| -> U256 {U256::from(base_cost) + U256::from(word_cost) * U256::from((s + 31) / 32)}); let cost = Box::new(move|s: usize| -> U256 {
U256::from(base_cost) + U256::from(word_cost) * U256::from((s + 31) / 32)
});
Self::new(cost, b) Self::new(cost, b)
}) })
} }
@ -126,4 +128,34 @@ fn identity() {
f(&i[..], &mut o8[..]); f(&i[..], &mut o8[..]);
assert_eq!(i, o8[..4]); assert_eq!(i, o8[..4]);
assert_eq!([255u8; 4], o8[4..]); assert_eq!([255u8; 4], o8[4..]);
}
#[test]
fn from_named_linear() {
let b = Builtin::from_named_linear("identity", 10, 20).unwrap();
assert_eq!((*b.cost)(0), U256::from(10));
assert_eq!((*b.cost)(1), U256::from(30));
assert_eq!((*b.cost)(32), U256::from(30));
assert_eq!((*b.cost)(33), U256::from(50));
let i = [0u8, 1, 2, 3];
let mut o = [255u8; 4];
(*b.execute)(&i[..], &mut o[..]);
assert_eq!(i, o);
}
#[test]
fn from_json() {
let text = "{ \"name\": \"identity\", \"linear\": {\"base\": 10, \"word\": 20} }";
let json = Json::from_str(text).unwrap();
let b = Builtin::from_json(&json).unwrap();
assert_eq!((*b.cost)(0), U256::from(10));
assert_eq!((*b.cost)(1), U256::from(30));
assert_eq!((*b.cost)(32), U256::from(30));
assert_eq!((*b.cost)(33), U256::from(50));
let i = [0u8, 1, 2, 3];
let mut o = [255u8; 4];
(*b.execute)(&i[..], &mut o[..]);
assert_eq!(i, o);
} }