add missing test

crates/ide_ssr/src/tests.rs

@@ -792,6 +792,19 @@ fn replace_type() {
             "struct Result<T, E> {} struct Option<T> {} fn f1() -> Option<Vec<Error>> {foo()}"
         ]],
     );
+    assert_ssr_transform(
+        "dyn Trait<$a> ==>> DynTrait<$a>",
+        r#"
+trait Trait<T> {}
+struct DynTrait<T> {}
+fn f1() -> dyn Trait<Vec<Error>> {foo()}
+"#,
+        expect![[r#"
+trait Trait<T> {}
+struct DynTrait<T> {}
+fn f1() -> DynTrait<Vec<Error>> {foo()}
+"#]],
+    );
 }
 
 #[test]