1 files changed, 45 insertions, 0 deletions
diff --git a/src/test/ui/lint/unused/useless-comment.rs b/src/test/ui/lint/unused/useless-comment.rs
new file mode 100644
index 000000000..7d2e5ab6f
--- /dev/null
+++ b/src/test/ui/lint/unused/useless-comment.rs
@@ -0,0 +1,45 @@
+#![feature(stmt_expr_attributes)]
+
+#![deny(unused_doc_comments)]
+
+macro_rules! mac {
+    () => {}
+}
+
+/// foo //~ ERROR unused doc comment
+mac!();
+
+fn foo() {
+    /// a //~ ERROR unused doc comment
+    let x = 12;
+
+    /// multi-line //~ unused doc comment
+    /// doc comment
+    /// that is unused
+    match x {
+        /// c //~ ERROR unused doc comment
+        1 => {},
+        _ => {}
+    }
+
+    /// foo //~ ERROR unused doc comment
+    unsafe {}
+
+    #[doc = "foo"] //~ ERROR unused doc comment
+    #[doc = "bar"] //~ ERROR unused doc comment
+    3;
+
+    /// bar //~ ERROR unused doc comment
+    mac!();
+
+    let x = /** comment */ 47; //~ ERROR unused doc comment
+
+    /// dox //~ ERROR unused doc comment
+    {
+
+    }
+}
+
+fn main() {
+    foo();
+}