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//! An algorithm to find a path to refer to a certain item.
use crate::{ModuleDefId, path::ModPath, ModuleId};
pub fn find_path(item: ModuleDefId, from: ModuleId) -> ModPath {
todo!()
}
#[cfg(test)]
mod tests {
use super::*;
use ra_db::{fixture::WithFixture, SourceDatabase};
use crate::{db::DefDatabase, test_db::TestDB};
use ra_syntax::ast::AstNode;
use hir_expand::hygiene::Hygiene;
/// `code` needs to contain a cursor marker; checks that `find_path` for the
/// item the `path` refers to returns that same path when called from the
/// module the cursor is in.
fn check_found_path(code: &str, path: &str) {
let (db, pos) = TestDB::with_position(code);
let module = db.module_for_file(pos.file_id);
let parsed_path_file = ra_syntax::SourceFile::parse(&format!("use {};", path));
let ast_path = parsed_path_file.syntax_node().descendants().find_map(ra_syntax::ast::Path::cast).unwrap();
let mod_path = ModPath::from_src(ast_path, &Hygiene::new_unhygienic()).unwrap();
let crate_def_map = db.crate_def_map(module.krate);
let resolved = crate_def_map.resolve_path(&db, module.local_id, &mod_path, crate::item_scope::BuiltinShadowMode::Module).0.take_types().unwrap();
let found_path = find_path(resolved, module);
assert_eq!(mod_path, found_path);
}
#[test]
fn same_module() {
let code = r#"
//- /main.rs
struct S;
<|>
"#;
check_found_path(code, "S");
}
}
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