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