cyb/wysm/crates/core/src/memory/tests.rs

use super::*;

fn memory_type(minimum: u32, maximum: impl Into<Option<u32>>) -> MemoryType {
    let mut b = MemoryType::builder();
    b.min(u64::from(minimum));
    b.max(maximum.into().map(u64::from));
    b.build().unwrap()
}

#[test]
fn subtyping_works() {
    assert!(memory_type(0, 1).is_subtype_of(&memory_type(0, 1)));
    assert!(memory_type(0, 1).is_subtype_of(&memory_type(0, 2)));
    assert!(!memory_type(0, 2).is_subtype_of(&memory_type(0, 1)));
    assert!(memory_type(2, None).is_subtype_of(&memory_type(1, None)));
    assert!(memory_type(0, None).is_subtype_of(&memory_type(0, None)));
    assert!(memory_type(0, 1).is_subtype_of(&memory_type(0, None)));
    assert!(!memory_type(0, None).is_subtype_of(&memory_type(0, 1)));
}