Move /src/test to /tests

tests/ui/rfc-2632-const-trait-impl/std-impl-gate.rs

@@ -0,0 +1,21 @@
+// This tests feature gates for const impls in the standard library.
+
+// revisions: stock gated
+//[gated] run-pass
+
+#![cfg_attr(gated, feature(const_trait_impl, const_default_impls))]
+
+fn non_const_context() -> Vec<usize> {
+    Default::default()
+}
+
+const fn const_context() -> Vec<usize> {
+    Default::default()
+    //[stock]~^ ERROR cannot call non-const fn
+}
+
+fn main() {
+    const VAL: Vec<usize> = const_context();
+
+    assert_eq!(VAL, non_const_context());
+}