Implement derive macros expansion tests using macrotest

test_suite/tests/expand/derive/struct/named_map.rs

@@ -0,0 +1,15 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Serialize)]
+struct SerNamedMap<'a, 'b, A: 'a, B: 'b, C> {
+    a: &'a A,
+    b: &'b mut B,
+    c: C,
+}
+
+#[derive(Deserialize)]
+struct DeNamedMap<A, B, C> {
+    a: A,
+    b: B,
+    c: C,
+}