Complicate

Fixing test fallout unfortunately requires more work, we need to do
it, but let's merge something at least!

1 files changed, 48 insertions, 3 deletions

diff --git a/crates/ra_db/src/fixture.rs b/crates/ra_db/src/fixture.rs
index ea52ec563..20f291568 100644
--- a/crates/ra_db/src/fixture.rs
+++ b/crates/ra_db/src/fixture.rs
@@ -74,9 +74,8 @@ pub const WORKSPACE: SourceRootId = SourceRootId(0);
 pub trait WithFixture: Default + SourceDatabaseExt + 'static {
     fn with_single_file(text: &str) -> (Self, FileId) {
         let mut db = Self::default();
-        let (_, files) = with_files(&mut db, text);
-        assert!(files.len() == 1);
-        (db, files[0])
+        let file_id = with_single_file(&mut db, text);
+        (db, file_id)
     }
 
     fn with_files(ra_fixture: &str) -> Self {
@@ -103,6 +102,52 @@ pub trait WithFixture: Default + SourceDatabaseExt + 'static {
 
 impl<DB: SourceDatabaseExt + Default + 'static> WithFixture for DB {}
 
+fn with_single_file(db: &mut dyn SourceDatabaseExt, ra_fixture: &str) -> FileId {
+    let file_id = FileId(0);
+    let mut file_set = vfs::file_set::FileSet::default();
+    file_set.insert(file_id, vfs::VfsPath::new_virtual_path("/main.rs".to_string()));
+
+    let source_root = SourceRoot::new_local(file_set);
+
+    let crate_graph = if let Some(meta) = ra_fixture.lines().find(|it| it.contains("//-")) {
+        let entry = Fixture::parse_single(meta.trim());
+        let meta = match ParsedMeta::from(&entry) {
+            ParsedMeta::File(it) => it,
+        };
+
+        let mut crate_graph = CrateGraph::default();
+        crate_graph.add_crate_root(
+            file_id,
+            meta.edition,
+            meta.krate.map(|name| {
+                CrateName::new(&name).expect("Fixture crate name should not contain dashes")
+            }),
+            meta.cfg,
+            meta.env,
+            Default::default(),
+        );
+        crate_graph
+    } else {
+        let mut crate_graph = CrateGraph::default();
+        crate_graph.add_crate_root(
+            file_id,
+            Edition::Edition2018,
+            None,
+            CfgOptions::default(),
+            Env::default(),
+            Default::default(),
+        );
+        crate_graph
+    };
+
+    db.set_file_text(file_id, Arc::new(ra_fixture.to_string()));
+    db.set_file_source_root(file_id, WORKSPACE);
+    db.set_source_root(WORKSPACE, Arc::new(source_root));
+    db.set_crate_graph(Arc::new(crate_graph));
+
+    file_id
+}
+
 fn with_files(
     db: &mut dyn SourceDatabaseExt,
     fixture: &str,