Move /src/test to /tests

tests/ui/proc-macro/struct-field-macro.rs

@@ -0,0 +1,18 @@
+// run-pass
+
+#![allow(dead_code)]
+// aux-build:derive-nothing.rs
+
+#[macro_use]
+extern crate derive_nothing;
+
+macro_rules! int {
+    () => { i32 }
+}
+
+#[derive(Nothing)]
+struct S {
+    x: int!(),
+}
+
+fn main() {}