Some update.

tests/CodeCompletion/test.cpp

@@ -1,6 +1,12 @@
-#include "test1.h"
-#include "test2.h"
+struct X {
+    int x;
+};
+
+void foo(int x, int y);
 
 int main() {
+    X xxx;
+    xxx.x = 2;
+    foo()
     return 0;
 }