1 files changed, 38 insertions, 0 deletions
diff --git a/src/test/ui/proc-macro/three-equals.rs b/src/test/ui/proc-macro/three-equals.rs
new file mode 100644
index 00000000000..e3285d3e821
--- /dev/null
+++ b/src/test/ui/proc-macro/three-equals.rs
@@ -0,0 +1,38 @@
+// Copyright 2016 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:three-equals.rs
+
+
+#![feature(proc_macro_hygiene)]
+
+extern crate three_equals;
+
+use three_equals::three_equals;
+
+fn main() {
+    // This one is okay.
+    three_equals!(===);
+
+    // Need exactly three equals.
+    three_equals!(==); //~ ERROR found 2 equal signs, need exactly 3
+
+    // Need exactly three equals.
+    three_equals!(=====); //~ ERROR expected EOF
+
+    // Only equals accepted.
+    three_equals!(abc); //~ ERROR expected `=`
+
+    // Only equals accepted.
+    three_equals!(!!); //~ ERROR expected `=`
+
+    // Only three characters expected.
+    three_equals!(===a); //~ ERROR expected EOF
+}