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//! utils used in proc-macro tests
use crate::dylib;
use crate::ProcMacroSrv;
pub use difference::Changeset as __Changeset;
use ra_proc_macro::ListMacrosTask;
use std::str::FromStr;
use test_utils::assert_eq_text;
mod fixtures {
use cargo_metadata::{parse_messages, Message};
use std::process::Command;
// Use current project metadata to get the proc-macro dylib path
pub fn dylib_path(crate_name: &str, version: &str) -> std::path::PathBuf {
let command = Command::new("cargo")
.args(&["check", "--message-format", "json"])
.output()
.unwrap()
.stdout;
for message in parse_messages(command.as_slice()) {
match message.unwrap() {
Message::CompilerArtifact(artifact) => {
if artifact.target.kind.contains(&"proc-macro".to_string()) {
let repr = format!("{} {}", crate_name, version);
if artifact.package_id.repr.starts_with(&repr) {
return artifact.filenames[0].clone();
}
}
}
_ => (), // Unknown message
}
}
panic!("No proc-macro dylib for {} found!", crate_name);
}
}
fn parse_string(code: &str) -> Option<crate::rustc_server::TokenStream> {
Some(crate::rustc_server::TokenStream::from_str(code).unwrap())
}
pub fn assert_expand(
crate_name: &str,
macro_name: &str,
version: &str,
fixture: &str,
expect: &str,
) {
let path = fixtures::dylib_path(crate_name, version);
let expander = dylib::Expander::new(&path).unwrap();
let fixture = parse_string(fixture).unwrap();
let res = expander.expand(macro_name, &fixture.subtree, None).unwrap();
assert_eq_text!(&format!("{:?}", res), &expect.trim());
}
pub fn list(crate_name: &str, version: &str) -> Vec<String> {
let path = fixtures::dylib_path(crate_name, version);
let task = ListMacrosTask { lib: path };
let mut srv = ProcMacroSrv::default();
let res = srv.list_macros(&task).unwrap();
res.macros.into_iter().map(|(name, kind)| format!("{} [{:?}]", name, kind)).collect()
}
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