lighthouse/eth2/utils/ssz/tests/tests.rs

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use ethereum_types::H256;
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use ssz::{Decodable, DecodeError, Encodable};
use ssz_derive::{Decode, Encode};
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mod round_trip {
use super::*;
fn round_trip<T: Encodable + Decodable + std::fmt::Debug + PartialEq>(items: Vec<T>) {
for item in items {
let encoded = &item.as_ssz_bytes();
dbg!(encoded);
assert_eq!(T::from_ssz_bytes(&encoded), Ok(item));
}
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}
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#[test]
fn bool() {
let items: Vec<bool> = vec![true, false];
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round_trip(items);
}
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#[test]
fn u8_array_4() {
let items: Vec<[u8; 4]> = vec![[0, 0, 0, 0], [1, 0, 0, 0], [1, 2, 3, 4], [1, 2, 0, 4]];
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round_trip(items);
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}
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#[test]
fn h256() {
let items: Vec<H256> = vec![H256::zero(), H256::from([1; 32]), H256::random()];
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round_trip(items);
}
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#[test]
fn vec_of_h256() {
let items: Vec<Vec<H256>> = vec![
vec![],
vec![H256::zero(), H256::from([1; 32]), H256::random()],
];
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round_trip(items);
}
#[test]
fn vec_u16() {
let items: Vec<Vec<u16>> = vec![
vec![],
vec![255],
vec![0, 1, 2],
vec![100; 64],
vec![255, 0, 255],
];
round_trip(items);
}
#[test]
fn vec_of_vec_u16() {
let items: Vec<Vec<Vec<u16>>> = vec![
vec![],
vec![vec![]],
vec![vec![1, 2, 3]],
vec![vec![], vec![]],
vec![vec![], vec![1, 2, 3]],
vec![vec![1, 2, 3], vec![1, 2, 3]],
vec![vec![1, 2, 3], vec![], vec![1, 2, 3]],
vec![vec![], vec![], vec![1, 2, 3]],
vec![vec![], vec![1], vec![1, 2, 3]],
vec![vec![], vec![1], vec![1, 2, 3]],
];
round_trip(items);
}
#[derive(Debug, PartialEq, Encode, Decode)]
struct FixedLen {
a: u16,
b: u64,
c: u32,
}
#[test]
fn fixed_len_struct_encoding() {
let items: Vec<FixedLen> = vec![
FixedLen { a: 0, b: 0, c: 0 },
FixedLen { a: 1, b: 1, c: 1 },
FixedLen { a: 1, b: 0, c: 1 },
];
let expected_encodings = vec![
// | u16--| u64----------------------------| u32----------|
vec![00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00],
vec![01, 00, 01, 00, 00, 00, 00, 00, 00, 00, 01, 00, 00, 00],
vec![01, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 00, 00],
];
for i in 0..items.len() {
assert_eq!(
items[i].as_ssz_bytes(),
expected_encodings[i],
"Failed on {}",
i
);
}
}
#[test]
fn vec_of_fixed_len_struct() {
let items: Vec<FixedLen> = vec![
FixedLen { a: 0, b: 0, c: 0 },
FixedLen { a: 1, b: 1, c: 1 },
FixedLen { a: 1, b: 0, c: 1 },
];
round_trip(items);
}
#[derive(Debug, PartialEq, Encode, Decode)]
struct VariableLen {
a: u16,
b: Vec<u16>,
c: u32,
}
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#[test]
fn offset_into_fixed_bytes() {
let bytes = vec![
// 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
// | offset | u32 | variable
01, 00, 09, 00, 00, 00, 01, 00, 00, 00, 00, 00, 01, 00, 02, 00,
];
assert_eq!(
VariableLen::from_ssz_bytes(&bytes),
Err(DecodeError::OutOfBoundsByte { i: 9 })
);
}
#[test]
fn first_offset_skips_byte() {
let bytes = vec![
// 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
// | offset | u32 | variable
01, 00, 11, 00, 00, 00, 01, 00, 00, 00, 00, 00, 01, 00, 02, 00,
];
assert_eq!(
VariableLen::from_ssz_bytes(&bytes),
Err(DecodeError::OutOfBoundsByte { i: 11 })
);
}
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#[test]
fn variable_len_struct_encoding() {
let items: Vec<VariableLen> = vec![
VariableLen {
a: 0,
b: vec![],
c: 0,
},
VariableLen {
a: 1,
b: vec![0],
c: 1,
},
VariableLen {
a: 1,
b: vec![0, 1, 2],
c: 1,
},
];
let expected_encodings = vec![
// 00..................................09
// | u16--| vec offset-----| u32------------| vec payload --------|
vec![00, 00, 10, 00, 00, 00, 00, 00, 00, 00],
vec![01, 00, 10, 00, 00, 00, 01, 00, 00, 00, 00, 00],
vec![
01, 00, 10, 00, 00, 00, 01, 00, 00, 00, 00, 00, 01, 00, 02, 00,
],
];
for i in 0..items.len() {
assert_eq!(
items[i].as_ssz_bytes(),
expected_encodings[i],
"Failed on {}",
i
);
}
}
#[test]
fn vec_of_variable_len_struct() {
let items: Vec<VariableLen> = vec![
VariableLen {
a: 0,
b: vec![],
c: 0,
},
VariableLen {
a: 255,
b: vec![0, 1, 2, 3],
c: 99,
},
VariableLen {
a: 255,
b: vec![0],
c: 99,
},
VariableLen {
a: 50,
b: vec![0],
c: 0,
},
];
round_trip(items);
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}
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#[derive(Debug, PartialEq, Encode, Decode)]
struct ThreeVariableLen {
a: u16,
b: Vec<u16>,
c: Vec<u16>,
d: Vec<u16>,
}
#[test]
fn offsets_decreasing() {
let bytes = vec![
// 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
// | offset | ofset | offset | variable
01, 00, 14, 00, 00, 00, 15, 00, 00, 00, 14, 00, 00, 00, 00, 00,
];
assert_eq!(
ThreeVariableLen::from_ssz_bytes(&bytes),
Err(DecodeError::OutOfBoundsByte { i: 14 })
);
}
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}