Move /src/test to /tests

tests/ui/specialization/defaultimpl/specialization-trait-item-not-implemented.rs

@@ -0,0 +1,23 @@
+// Tests that default impls do not have to supply all items but regular impls do.
+
+#![feature(specialization)] //~ WARN the feature `specialization` is incomplete
+
+trait Foo {
+    fn foo_one(&self) -> &'static str;
+    fn foo_two(&self) -> &'static str;
+}
+
+struct MyStruct;
+
+default impl<T> Foo for T {
+    fn foo_one(&self) -> &'static str {
+        "generic"
+    }
+}
+
+impl Foo for MyStruct {}
+//~^ ERROR not all trait items implemented, missing: `foo_two` [E0046]
+
+fn main() {
+    println!("{}", MyStruct.foo_one());
+}