Add tests to module resolver, add support for symlinks

crates/red_knot/Cargo.toml

@@ -19,12 +19,16 @@ ruff_text_size = { path = "../ruff_text_size" }
 ruff_index = { path = "../ruff_index" }
 
 anyhow = { workspace = true }
+filetime = { workspace = true }
 hashbrown = { workspace = true }
 log = { workspace = true }
 rustc-hash = { workspace = true }
 parking_lot = { workspace = true }
 salsa = { git = "https://github.com/salsa-rs/salsa.git", package = "salsa-2022", rev = "f5aec4abefb4c5e67cba6d8ea91c216bc2838f10" }
 smol_str = "0.2.1"
 
+[dev-dependencies]
+tempfile = { workspace = true }
+
 [lints]
 workspace = true

crates/red_knot/src/hir/definition.rs

@@ -449,11 +449,11 @@ impl DefinitionsVisitor<'_> {
         }
     }
 
-    fn lower_import(&mut self, import: &StmtImport) {
+    fn lower_import(&mut self, _import: &StmtImport) {
         // TODO
     }
 
-    fn lower_import_from(&mut self, import_from: &StmtImportFrom) {
+    fn lower_import_from(&mut self, _import_from: &StmtImportFrom) {
         // TODO
     }
 
@@ -469,15 +469,15 @@ impl DefinitionsVisitor<'_> {
         })
     }
 
-    fn lower_except_handler(&mut self, except_handler: &ExceptHandlerExceptHandler) {
+    fn lower_except_handler(&mut self, _except_handler: &ExceptHandlerExceptHandler) {
         // TODO
     }
 
-    fn lower_with_item(&mut self, with_item: &WithItem) {
+    fn lower_with_item(&mut self, _with_item: &WithItem) {
         // TODO
     }
 
-    fn lower_match_case(&mut self, match_case: &MatchCase) {
+    fn lower_match_case(&mut self, _match_case: &MatchCase) {
         // TODO
     }
 }

crates/red_knot/src/lib.rs

@@ -1,3 +1,5 @@
+#![allow(unreachable_pub)]
+
 use std::path::{Path, PathBuf};
 
 use rustc_hash::FxHashSet;