Reexport tests without polluting namespaces

src/test/run-pass/issue-52557.rs

@@ -0,0 +1,33 @@
+// 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.
+
+// This test checks for namespace pollution by private tests.
+// Tests used to marked as public causing name conflicts with normal
+// functions only in test builds.
+
+// compile-flags: --test
+
+mod a {
+    pub fn foo() -> bool {
+        true
+    }
+}
+
+mod b {
+    #[test]
+    fn foo() {}
+}
+
+use a::*;
+use b::*;
+
+fn conflict() {
+    let _: bool = foo();
+}