Do not show references CodeLens for tests.

crates/ide/src/fn_references.rs

@@ -0,0 +1,21 @@
+use hir::Semantics;
+use ide_db::RootDatabase;
+use syntax::{ast, ast::NameOwner, AstNode, SyntaxNode};
+
+use crate::{runnables::has_test_related_attribute, FileId, FileRange};
+
+pub(crate) fn find_all_methods(db: &RootDatabase, file_id: FileId) -> Vec<FileRange> {
+    let sema = Semantics::new(db);
+    let source_file = sema.parse(file_id);
+    source_file.syntax().descendants().filter_map(|it| method_range(it, file_id)).collect()
+}
+
+pub(crate) fn method_range(item: SyntaxNode, file_id: FileId) -> Option<FileRange> {
+    ast::Fn::cast(item).and_then(|fn_def|{
+        if has_test_related_attribute(&fn_def) {
+            None
+        } else {
+            fn_def.name().map(|name| FileRange{ file_id, range: name.syntax().text_range() })
+        }
+    })
+}

crates/ide/src/lib.rs

@@ -38,6 +38,7 @@ mod join_lines;
 mod matching_brace;
 mod parent_module;
 mod references;
+mod fn_references;
 mod runnables;
 mod status;
 mod syntax_highlighting;
@@ -56,7 +57,7 @@ use ide_db::{
     symbol_index::{self, FileSymbol},
     LineIndexDatabase,
 };
-use syntax::{SourceFile, SyntaxKind, TextRange, TextSize};
+use syntax::{SourceFile, TextRange, TextSize};
 
 use crate::display::ToNav;
 
@@ -369,19 +370,9 @@ impl Analysis {
         })
     }
 
-    /// Finds all methods and free functions for the file.
+    /// Finds all methods and free functions for the file. Does not return tests!
     pub fn find_all_methods(&self, file_id: FileId) -> Cancelable<Vec<FileRange>> {
-        let res = self
-            .file_structure(file_id)?
-            .into_iter()
-            .filter(|it| match it.kind {
-                SyntaxKind::FN => true,
-                _ => false,
-            })
-            .filter_map(|it| Some(FileRange { file_id, range: it.navigation_range }))
-            .collect();
-
-        Ok(res)
+        self.with_db(|db| fn_references::find_all_methods(db, file_id))
     }
 
     /// Returns a short text describing element at position.

crates/ide/src/runnables.rs

@@ -203,7 +203,7 @@ impl TestAttr {
 ///
 /// It may produce false positives, for example, `#[wasm_bindgen_test]` requires a different command to run the test,
 /// but it's better than not to have the runnables for the tests at all.
-fn has_test_related_attribute(fn_def: &ast::Fn) -> bool {
+pub(crate) fn has_test_related_attribute(fn_def: &ast::Fn) -> bool {
     fn_def
         .attrs()
         .filter_map(|attr| attr.path())