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|
use std::path::Path;
use anyhow::{bail, Context, Result};
macro_rules! genexpand {
($id:ident $name:tt $path:tt) => {
process_expanded($path, "", wasmtime::component::bindgen!({
path: $path,
stringify: true,
}))?;
process_expanded($path, "_async", wasmtime::component::bindgen!({
path: $path,
async: true,
stringify: true,
}))?;
process_expanded($path, "_tracing_async", wasmtime::component::bindgen!({
path: $path,
async: true,
tracing: true,
stringify: true,
}))?;
};
}
fn process_expanded(path: &str, suffix: &str, src: &str) -> Result<()> {
let formatted_src = {
let syn_file = syn::parse_file(src).unwrap();
prettyplease::unparse(&syn_file)
};
let expanded_path = {
let mut stem = Path::new(path).file_stem().unwrap().to_os_string();
stem.push(suffix);
Path::new("tests/expanded").join(stem).with_extension("rs")
};
if std::env::var("BINDGEN_TEST_BLESS").is_ok_and(|val| !val.is_empty()) {
std::fs::write(expanded_path, formatted_src)?;
} else {
match std::fs::read_to_string(&expanded_path) {
Ok(expected) if formatted_src == expected => (),
Ok(expected) => {
bail!(
"checked-in expanded bindings from {expanded_path:?} \
do not match those generated from {path:?}
\n\
{diff}\n\
\n\
This test assertion can be automatically updated by setting the\n\
BINDGEN_TEST_BLESS=1 environment variable when running this test.",
diff = similar::TextDiff::from_lines(&expected, &formatted_src)
.unified_diff()
.header("expected", "actual")
)
}
Err(err) => {
return Err(err).with_context(|| {
format!(
"failed to read {expanded_path:?}; re-run with BINDGEN_TEST_BLESS=1 to create"
)
})
}
}
}
Ok(())
}
#[test]
fn expand_wits() -> Result<()> {
component_macro_test_helpers::foreach!(genexpand);
Ok(())
}
|
