1 files changed, 49 insertions, 0 deletions
diff --git a/tests/ui/lint/unused/unused-macro-rules-decl.rs b/tests/ui/lint/unused/unused-macro-rules-decl.rs
new file mode 100644
index 000000000..537c84940
--- /dev/null
+++ b/tests/ui/lint/unused/unused-macro-rules-decl.rs
@@ -0,0 +1,49 @@
+#![feature(decl_macro)]
+#![deny(unused_macro_rules)]
+// To make sure we are not hitting this
+#![deny(unused_macros)]
+
+// Most simple case
+macro num {
+    (one) => { 1 },
+    (two) => { 2 }, //~ ERROR: 2nd rule of macro
+    (three) => { 3 },
+    (four) => { 4 }, //~ ERROR: 4th rule of macro
+}
+const _NUM: u8 = num!(one) + num!(three);
+
+// Check that allowing the lint works
+#[allow(unused_macro_rules)]
+macro num_allowed {
+    (one) => { 1 },
+    (two) => { 2 },
+    (three) => { 3 },
+    (four) => { 4 },
+}
+const _NUM_ALLOWED: u8 = num_allowed!(one) + num_allowed!(three);
+
+// Check that macro calls inside the macro trigger as usage
+macro num_rec {
+    (one) => { 1 },
+    (two) => {
+        num_rec!(one) + num_rec!(one)
+    },
+    (three) => { //~ ERROR: 3rd rule of macro
+        num_rec!(one) + num_rec!(two)
+    },
+    (four) => {
+        num_rec!(two) + num_rec!(two)
+    },
+}
+const _NUM_RECURSIVE: u8 = num_rec!(four);
+
+// No error if the macro is public
+pub macro num_public {
+    (one) => { 1 },
+    (two) => { 2 },
+    (three) => { 3 },
+    (four) => { 4 },
+}
+const _NUM_PUBLIC: u8 = num_public!(one) + num_public!(three);
+
+fn main() {}