coil-wasm 0.1.0

WASM extension runtime and host APIs for the Coil framework.
Documentation 
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use super::cursor::{ByteCursor, write_len_u32};
use super::*;

#[test]
fn typed_output_uses_the_coil_magic_header() {
    let encoded = TypedExecutionOutput::render_hook(
        200,
        "<aside>Render hook</aside>",
        TypedMetadata::new(),
        None,
    )
    .unwrap()
    .encode()
    .unwrap();

    assert_eq!(&encoded[..4], &ABI_MAGIC);
    assert_eq!(&encoded[..4], b"CLRO");
}

#[test]
fn write_len_u32_rejects_lengths_that_do_not_fit_in_the_abi() {
    let error = write_len_u32("json_object_entry_count", (u32::MAX as usize) + 1).unwrap_err();
    assert_eq!(
        error,
        WasmModelError::InvalidTypedReturn {
            reason: "`json_object_entry_count` exceeds the maximum typed ABI length".to_string(),
        }
    );
}

#[test]
fn byte_cursor_rejects_offset_overflow_when_reading_arrays() {
    let mut cursor = ByteCursor {
        bytes: &[],
        offset: usize::MAX,
    };

    let error = cursor.read_array::<1>().unwrap_err();
    assert_eq!(
        error,
        WasmModelError::InvalidTypedReturn {
            reason: "unexpected end of typed return payload".to_string(),
        }
    );
}