Add integration test for getting and resolving completions

crates/editor/src/editor.rs

@@ -1677,7 +1677,7 @@ impl Editor {
         self.completion_state.take()
     }
 
-    fn confirm_completion(
+    pub fn confirm_completion(
         &mut self,
         completion_ix: Option<usize>,
         cx: &mut ViewContext<Self>,

crates/editor/src/multi_buffer.rs

@@ -1339,7 +1339,7 @@ impl MultiBufferSnapshot {
             range: range.clone(),
             excerpts: self.excerpts.cursor(),
             excerpt_chunks: None,
-            language_aware: language_aware,
+            language_aware,
         };
         chunks.seek(range.start);
         chunks