Add test of cross-crate impl formatting

Author: wthrowe

src/test/auxiliary/rustdoc-impl-parts-crosscrate.rs

@@ -0,0 +1,15 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(optin_builtin_traits)]
+
+pub trait AnOibit {}
+
+impl AnOibit for .. {}

src/test/rustdoc/impl-parts-crosscrate.rs

@@ -0,0 +1,29 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// aux-build:rustdoc-impl-parts-crosscrate.rs
+
+#![feature(optin_builtin_traits)]
+
+extern crate rustdoc_impl_parts_crosscrate;
+
+pub struct Bar<T> { t: T }
+
+// The output file is html embeded in javascript, so the html tags
+// aren't stripped by the processing script and we can't check for the
+// full impl string.  Instead, just make sure something from each part
+// is mentioned.
+
+// @has implementors/rustdoc_impl_parts_crosscrate/trait.AnOibit.js Bar
+// @has - Send
+// @has - !AnOibit
+// @has - Copy
+impl<T: Send> !rustdoc_impl_parts_crosscrate::AnOibit for Bar<T>
+    where T: Copy {}