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Add bound-test in addition to equality-test

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This commit is contained in:
Julien Cretin
2021-01-18 16:13:01 +01:00
parent 2cd760bad7
commit 55038cc084
1 changed files with 7 additions and 4 deletions
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11
libraries/persistent_store/src/format.rs
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@@ -1080,9 +1080,12 @@ mod tests {
#[test] #[test]
fn position_offsets_fit_in_a_halfword() { fn position_offsets_fit_in_a_halfword() {
// The store stores the entry positions as their offset from the head. Those offsets are // The store stores in RAM the entry positions as their offset from the head. Those offsets
// represented as u16. The bound below is a large over-approximation of the maximal offset // are represented as u16. The bound below is a large over-approximation of the maximal
// but it already fits. // offset. We first make sure it fits in a u16.
assert_eq!((MAX_PAGE_INDEX + 1) * MAX_VIRT_PAGE_SIZE, 0xff80); const MAX_POS: Nat = (MAX_PAGE_INDEX + 1) * MAX_VIRT_PAGE_SIZE;
assert!(MAX_POS <= u16::MAX as Nat);
// We also check the actual value for up-to-date documentation, since it's a constant.
assert_eq!(MAX_POS, 0xff80);
} }
} }