set local root in ide assists test setup

Author: JoshMcguigan

crates/ide_assists/src/tests.rs

@@ -3,14 +3,16 @@ mod generated;
 use expect_test::expect;
 use hir::Semantics;
 use ide_db::{
-    base_db::{fixture::WithFixture, FileId, FileRange, SourceDatabaseExt},
+    base_db::{fixture::WithFixture, salsa::Durability, FileId, FileRange, SourceDatabaseExt},
     helpers::{
         insert_use::{InsertUseConfig, MergeBehavior},
         SnippetCap,
     },
     source_change::FileSystemEdit,
     RootDatabase,
 };
+use rustc_hash::FxHashSet;
+use std::sync::Arc;
 use stdx::{format_to, trim_indent};
 use syntax::TextRange;
 use test_utils::{assert_eq_text, extract_offset};
@@ -101,7 +103,12 @@ enum ExpectedResult<'a> {
 
 #[track_caller]
 fn check(handler: Handler, before: &str, expected: ExpectedResult, assist_label: Option<&str>) {
-    let (db, file_with_caret_id, range_or_offset) = RootDatabase::with_range_or_offset(before);
+    use ide_db::symbol_index::SymbolsDatabase;
+    let (mut db, file_with_caret_id, range_or_offset) = RootDatabase::with_range_or_offset(before);
+    let mut local_roots = FxHashSet::default();
+    local_roots.insert(ide_db::base_db::fixture::WORKSPACE);
+    db.set_local_roots_with_durability(Arc::new(local_roots), Durability::HIGH);
+
     let text_without_caret = db.file_text(file_with_caret_id).to_string();
 
     let frange = FileRange { file_id: file_with_caret_id, range: range_or_offset.into() };