From 2f6c0c314b749e25431f3fd6caaac5d3270751b6 Mon Sep 17 00:00:00 2001 From: Aleksey Kladov Date: Fri, 15 Nov 2019 14:47:26 +0300 Subject: Move scope tests to hir_def --- crates/ra_hir_def/src/body/scope.rs | 219 ++++++++++++++++++++++++++++++++++++ 1 file changed, 219 insertions(+) (limited to 'crates/ra_hir_def/src/body') diff --git a/crates/ra_hir_def/src/body/scope.rs b/crates/ra_hir_def/src/body/scope.rs index 09a39e721..10cb87d37 100644 --- a/crates/ra_hir_def/src/body/scope.rs +++ b/crates/ra_hir_def/src/body/scope.rs @@ -67,6 +67,11 @@ impl ExprScopes { std::iter::successors(scope, move |&scope| self.scopes[scope].parent) } + pub fn resolve_name_in_scope(&self, scope: ScopeId, name: &Name) -> Option<&ScopeEntry> { + self.scope_chain(Some(scope)) + .find_map(|scope| self.entries(scope).iter().find(|it| it.name == *name)) + } + pub fn scope_for(&self, expr: ExprId) -> Option { self.scope_by_expr.get(&expr).copied() } @@ -163,3 +168,217 @@ fn compute_expr_scopes(expr: ExprId, body: &Body, scopes: &mut ExprScopes, scope e => e.walk_child_exprs(|e| compute_expr_scopes(e, body, scopes, scope)), }; } + +#[cfg(test)] +mod tests { + use hir_expand::{name::AsName, Source}; + use ra_db::{fixture::WithFixture, FileId, SourceDatabase}; + use ra_syntax::{algo::find_node_at_offset, ast, AstNode}; + use test_utils::{assert_eq_text, extract_offset}; + + use crate::{db::DefDatabase2, test_db::TestDB, FunctionId, ModuleDefId}; + + fn find_function(db: &TestDB, file_id: FileId) -> FunctionId { + let krate = db.test_crate(); + let crate_def_map = db.crate_def_map(krate); + + let module = crate_def_map.modules_for_file(file_id).next().unwrap(); + let (_, res) = crate_def_map[module].scope.entries().next().unwrap(); + match res.def.take_values().unwrap() { + ModuleDefId::FunctionId(it) => it, + _ => panic!(), + } + } + + fn do_check(code: &str, expected: &[&str]) { + let (off, code) = extract_offset(code); + let code = { + let mut buf = String::new(); + let off = u32::from(off) as usize; + buf.push_str(&code[..off]); + buf.push_str("marker"); + buf.push_str(&code[off..]); + buf + }; + + let (db, file_id) = TestDB::with_single_file(&code); + + let file_syntax = db.parse(file_id).syntax_node(); + let marker: ast::PathExpr = find_node_at_offset(&file_syntax, off).unwrap(); + let function = find_function(&db, file_id); + + let scopes = db.expr_scopes(function.into()); + let (_body, source_map) = db.body_with_source_map(function.into()); + + let expr_id = + source_map.node_expr(Source { file_id: file_id.into(), ast: &marker.into() }).unwrap(); + let scope = scopes.scope_for(expr_id); + + let actual = scopes + .scope_chain(scope) + .flat_map(|scope| scopes.entries(scope)) + .map(|it| it.name().to_string()) + .collect::>() + .join("\n"); + let expected = expected.join("\n"); + assert_eq_text!(&expected, &actual); + } + + #[test] + fn test_lambda_scope() { + do_check( + r" + fn quux(foo: i32) { + let f = |bar, baz: i32| { + <|> + }; + }", + &["bar", "baz", "foo"], + ); + } + + #[test] + fn test_call_scope() { + do_check( + r" + fn quux() { + f(|x| <|> ); + }", + &["x"], + ); + } + + #[test] + fn test_method_call_scope() { + do_check( + r" + fn quux() { + z.f(|x| <|> ); + }", + &["x"], + ); + } + + #[test] + fn test_loop_scope() { + do_check( + r" + fn quux() { + loop { + let x = (); + <|> + }; + }", + &["x"], + ); + } + + #[test] + fn test_match() { + do_check( + r" + fn quux() { + match () { + Some(x) => { + <|> + } + }; + }", + &["x"], + ); + } + + #[test] + fn test_shadow_variable() { + do_check( + r" + fn foo(x: String) { + let x : &str = &x<|>; + }", + &["x"], + ); + } + + fn do_check_local_name(code: &str, expected_offset: u32) { + let (off, code) = extract_offset(code); + + let (db, file_id) = TestDB::with_single_file(&code); + + let file = db.parse(file_id).ok().unwrap(); + let expected_name = find_node_at_offset::(file.syntax(), expected_offset.into()) + .expect("failed to find a name at the target offset"); + let name_ref: ast::NameRef = find_node_at_offset(file.syntax(), off).unwrap(); + + let function = find_function(&db, file_id); + + let scopes = db.expr_scopes(function.into()); + let (_body, source_map) = db.body_with_source_map(function.into()); + + let expr_scope = { + let expr_ast = name_ref.syntax().ancestors().find_map(ast::Expr::cast).unwrap(); + let expr_id = + source_map.node_expr(Source { file_id: file_id.into(), ast: &expr_ast }).unwrap(); + scopes.scope_for(expr_id).unwrap() + }; + + let resolved = scopes.resolve_name_in_scope(expr_scope, &name_ref.as_name()).unwrap(); + let pat_src = source_map.pat_syntax(resolved.pat()).unwrap(); + + let local_name = pat_src.ast.either(|it| it.syntax_node_ptr(), |it| it.syntax_node_ptr()); + assert_eq!(local_name.range(), expected_name.syntax().text_range()); + } + + #[test] + fn test_resolve_local_name() { + do_check_local_name( + r#" + fn foo(x: i32, y: u32) { + { + let z = x * 2; + } + { + let t = x<|> * 3; + } + }"#, + 21, + ); + } + + #[test] + fn test_resolve_local_name_declaration() { + do_check_local_name( + r#" + fn foo(x: String) { + let x : &str = &x<|>; + }"#, + 21, + ); + } + + #[test] + fn test_resolve_local_name_shadow() { + do_check_local_name( + r" + fn foo(x: String) { + let x : &str = &x; + x<|> + } + ", + 53, + ); + } + + #[test] + fn ref_patterns_contribute_bindings() { + do_check_local_name( + r" + fn foo() { + if let Some(&from) = bar() { + from<|>; + } + } + ", + 53, + ); + } +} -- cgit v1.2.3