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//! utils used in proc-macro tests
use crate::dylib;
use crate::ProcMacroSrv;
use expect_test::Expect;
use std::str::FromStr;
pub mod fixtures {
pub fn proc_macro_test_dylib_path() -> std::path::PathBuf {
proc_macro_test::PROC_MACRO_TEST_LOCATION.into()
}
}
fn parse_string(code: &str) -> Option<crate::abis::TestTokenStream> {
// This is a bit strange. We need to parse a string into a token stream into
// order to create a tt::SubTree from it in fixtures. `into_subtree` is
// implemented by all the ABIs we have so we arbitrarily choose one ABI to
// write a `parse_string` function for and use that. The tests don't really
// care which ABI we're using as the `into_subtree` function isn't part of
// the ABI and shouldn't change between ABI versions.
crate::abis::TestTokenStream::from_str(code).ok()
}
pub fn assert_expand(macro_name: &str, ra_fixture: &str, expect: Expect) {
assert_expand_impl(macro_name, ra_fixture, None, expect);
}
pub fn assert_expand_attr(macro_name: &str, ra_fixture: &str, attr_args: &str, expect: Expect) {
assert_expand_impl(macro_name, ra_fixture, Some(attr_args), expect);
}
fn assert_expand_impl(macro_name: &str, input: &str, attr: Option<&str>, expect: Expect) {
let path = fixtures::proc_macro_test_dylib_path();
let expander = dylib::Expander::new(&path).unwrap();
let fixture = parse_string(input).unwrap();
let attr = attr.map(|attr| parse_string(attr).unwrap().into_subtree());
let res = expander.expand(macro_name, &fixture.into_subtree(), attr.as_ref()).unwrap();
expect.assert_eq(&format!("{:?}", res));
}
pub(crate) fn list() -> Vec<String> {
let dylib_path = fixtures::proc_macro_test_dylib_path();
let mut srv = ProcMacroSrv::default();
let res = srv.list_macros(&dylib_path).unwrap();
res.into_iter().map(|(name, kind)| format!("{} [{:?}]", name, kind)).collect()
}
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