Test Fixture ExplicitRoot + ModuleResolutionRelativePathOutsideRoot.

crates/base_db/src/fixture.rs

@@ -150,6 +150,8 @@ impl ChangeFixture {
                 entry.text.clone()
             };
 
+            let explicit_root = entry.explicit_root;
+
             let meta = FileMeta::from(entry);
             assert!(meta.path.starts_with(&source_root_prefix));
 
@@ -169,7 +171,7 @@ impl ChangeFixture {
                     let dep = CrateName::normalize_dashes(&dep);
                     crate_deps.push((crate_name.clone(), dep))
                 }
-            } else if meta.path == "/main.rs" || meta.path == "/lib.rs" {
+            } else if meta.path == "/main.rs" || meta.path == "/lib.rs" || explicit_root {
                 assert!(default_crate_root.is_none());
                 default_crate_root = Some(file_id);
                 default_cfg = meta.cfg;

crates/hir_def/src/nameres/tests/mod_resolution.rs

@@ -323,13 +323,26 @@ pub struct Baz;
 fn module_resolution_relative_path_outside_root() {
     check(
         r#"
-//- /main.rs
+//- /a/b/c/d/e/main.rs root:
 #[path="../../../../../outside.rs"]
 mod foo;
+
+//- /outside.rs
+mod bar;
+
+//- /bar.rs
+pub struct Baz;
 "#,
         expect![[r#"
             crate
-        "#]],
+            foo: t
+
+            crate::foo
+            bar: t
+
+            crate::foo::bar
+            Baz: t v
+"#]],
     );
 }
 

crates/test_utils/src/fixture.rs

@@ -8,6 +8,7 @@ use stdx::{lines_with_ends, split_once, trim_indent};
 pub struct Fixture {
     pub path: String,
     pub text: String,
+    pub explicit_root: bool,
     pub krate: Option<String>,
     pub deps: Vec<String>,
     pub cfg_atoms: Vec<String>,
@@ -64,6 +65,7 @@ impl Fixture {
         let path = components[0].to_string();
         assert!(path.starts_with('/'));
 
+        let mut explicit_root = false;
         let mut krate = None;
         let mut deps = Vec::new();
         let mut edition = None;
@@ -73,6 +75,7 @@ impl Fixture {
         for component in components[1..].iter() {
             let (key, value) = split_once(component, ':').unwrap();
             match key {
+                "root" => explicit_root = true,
                 "crate" => krate = Some(value.to_string()),
                 "deps" => deps = value.split(',').map(|it| it.to_string()).collect(),
                 "edition" => edition = Some(value.to_string()),
@@ -98,6 +101,7 @@ impl Fixture {
         Fixture {
             path,
             text: String::new(),
+            explicit_root: explicit_root,
             krate: krate,
             deps,
             cfg_atoms,