use std::{fs, path::PathBuf};
fn runner_source() -> String {
let path = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("assets/runners/wasm-runner.mjs");
fs::read_to_string(path).expect("read wasm runner")
}
#[test]
fn existing_path_errors_reach_libc_as_eexist() {
let source = runner_source();
let start = source
.find("function mapHostProcessError(")
.expect("host error mapper");
let end = source[start..]
.find("\n}\n\nfunction seekGuestFileHandle")
.map(|offset| start + offset)
.expect("end of host error mapper");
let error_map = &source[start..end];
assert!(
source.contains("const WASI_ERRNO_EXIST = 20;")
&& error_map.contains("case 'EEXIST':\n return WASI_ERRNO_EXIST;"),
"host EEXIST must retain the preview1/WASI errno value instead of becoming EFAULT"
);
}
#[test]
fn path_open_preserves_directory_and_nofollow_before_kernel_mutation() {
let source = runner_source();
assert!(
source.contains("const KERNEL_O_DIRECTORY = 0o200000;")
&& source.contains("const KERNEL_O_NOFOLLOW = 0o400000;"),
"the runner must expose the kernel's Linux-compatible open flag bits"
);
assert!(
source.contains(
"if ((normalizedOflags & WASI_OFLAGS_DIRECTORY) !== 0) flags |= KERNEL_O_DIRECTORY;"
) && source.contains("flags |= KERNEL_O_NOFOLLOW;"),
"path_open must pass O_DIRECTORY and a missing SYMLINK_FOLLOW lookup flag to the kernel"
);
assert!(
source.contains("kernelOpenFlagsFromWasi(oflags, rightsBase, fdflags, dirflags)"),
"path_open must include its WASI lookup flags in the kernel conversion"
);
assert!(
source.contains(
"function openProcSelfFdAlias(guestPath, oflags, rightsBase, lookupflags, openedFdPtr)"
) && source.contains("return WASI_ERRNO_LOOP;"),
"runner-local /proc/self/fd and /dev/fd aliases must not bypass O_NOFOLLOW"
);
}