From 01791dee8a6c93bdbc9e3c9369b6b5f0ee35e5c8 Mon Sep 17 00:00:00 2001
From: Manish Goregaokar <manishsmail@gmail.com>
Date: Fri, 4 May 2018 11:25:31 -0700
Subject: [PATCH] Add test

---
 .../ui-fulldeps/unnecessary-extern-crate.rs   | 55 +++++++++++++++
 .../unnecessary-extern-crate.stderr           | 68 +++++++++++++++++++
 2 files changed, 123 insertions(+)
 create mode 100644 src/test/ui-fulldeps/unnecessary-extern-crate.rs
 create mode 100644 src/test/ui-fulldeps/unnecessary-extern-crate.stderr

diff --git a/src/test/ui-fulldeps/unnecessary-extern-crate.rs b/src/test/ui-fulldeps/unnecessary-extern-crate.rs
new file mode 100644
index 0000000000000..9d678d91578bc
--- /dev/null
+++ b/src/test/ui-fulldeps/unnecessary-extern-crate.rs
@@ -0,0 +1,55 @@
+// 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.
+
+#![deny(unnecessary_extern_crate)]
+#![feature(alloc, test, libc)]
+
+extern crate alloc;
+//~^ ERROR `extern crate` is unnecessary in the new edition
+//~| HELP remove
+extern crate alloc as x;
+//~^ ERROR `extern crate` is unnecessary in the new edition
+//~| HELP use `use`
+
+#[macro_use]
+extern crate test;
+pub extern crate test as y;
+//~^ ERROR `extern crate` is unnecessary in the new edition
+//~| HELP use `pub use`
+pub extern crate libc;
+//~^ ERROR `extern crate` is unnecessary in the new edition
+//~| HELP use `pub use`
+
+
+mod foo {
+    extern crate alloc;
+    //~^ ERROR `extern crate` is unnecessary in the new edition
+    //~| HELP use `use`
+    extern crate alloc as x;
+    //~^ ERROR `extern crate` is unnecessary in the new edition
+    //~| HELP use `use`
+    pub extern crate test;
+    //~^ ERROR `extern crate` is unnecessary in the new edition
+    //~| HELP use `pub use`
+    pub extern crate test as y;
+    //~^ ERROR `extern crate` is unnecessary in the new edition
+    //~| HELP use `pub use`
+    mod bar {
+        extern crate alloc;
+        //~^ ERROR `extern crate` is unnecessary in the new edition
+        //~| HELP use `use`
+        extern crate alloc as x;
+        //~^ ERROR `extern crate` is unnecessary in the new edition
+        //~| HELP use `use`
+    }
+}
+
+
+fn main() {}
diff --git a/src/test/ui-fulldeps/unnecessary-extern-crate.stderr b/src/test/ui-fulldeps/unnecessary-extern-crate.stderr
new file mode 100644
index 0000000000000..7718808be58ba
--- /dev/null
+++ b/src/test/ui-fulldeps/unnecessary-extern-crate.stderr
@@ -0,0 +1,68 @@
+error: `extern crate` is unnecessary in the new edition
+  --> $DIR/unnecessary-extern-crate.rs:14:1
+   |
+LL | extern crate alloc;
+   | ^^^^^^^^^^^^^^^^^^^ help: remove it
+   |
+note: lint level defined here
+  --> $DIR/unnecessary-extern-crate.rs:11:9
+   |
+LL | #![deny(unnecessary_extern_crate)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: `extern crate` is unnecessary in the new edition
+  --> $DIR/unnecessary-extern-crate.rs:17:1
+   |
+LL | extern crate alloc as x;
+   | ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `use`: `use alloc as x`
+
+error: `extern crate` is unnecessary in the new edition
+  --> $DIR/unnecessary-extern-crate.rs:23:1
+   |
+LL | pub extern crate test as y;
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `pub use`: `pub use test as y`
+
+error: `extern crate` is unnecessary in the new edition
+  --> $DIR/unnecessary-extern-crate.rs:26:1
+   |
+LL | pub extern crate libc;
+   | ^^^^^^^^^^^^^^^^^^^^^^ help: use `pub use`: `pub use libc`
+
+error: `extern crate` is unnecessary in the new edition
+  --> $DIR/unnecessary-extern-crate.rs:32:5
+   |
+LL |     extern crate alloc;
+   |     ^^^^^^^^^^^^^^^^^^^ help: use `use`: `use alloc`
+
+error: `extern crate` is unnecessary in the new edition
+  --> $DIR/unnecessary-extern-crate.rs:35:5
+   |
+LL |     extern crate alloc as x;
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `use`: `use alloc as x`
+
+error: `extern crate` is unnecessary in the new edition
+  --> $DIR/unnecessary-extern-crate.rs:38:5
+   |
+LL |     pub extern crate test;
+   |     ^^^^^^^^^^^^^^^^^^^^^^ help: use `pub use`: `pub use test`
+
+error: `extern crate` is unnecessary in the new edition
+  --> $DIR/unnecessary-extern-crate.rs:41:5
+   |
+LL |     pub extern crate test as y;
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `pub use`: `pub use test as y`
+
+error: `extern crate` is unnecessary in the new edition
+  --> $DIR/unnecessary-extern-crate.rs:45:9
+   |
+LL |         extern crate alloc;
+   |         ^^^^^^^^^^^^^^^^^^^ help: use `use`: `use alloc`
+
+error: `extern crate` is unnecessary in the new edition
+  --> $DIR/unnecessary-extern-crate.rs:48:9
+   |
+LL |         extern crate alloc as x;
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `use`: `use alloc as x`
+
+error: aborting due to 10 previous errors
+