1 files changed, 51 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/empty_loop.rs b/src/tools/clippy/tests/ui/empty_loop.rs
new file mode 100644
index 000000000..8fd7697eb
--- /dev/null
+++ b/src/tools/clippy/tests/ui/empty_loop.rs
@@ -0,0 +1,51 @@
+// aux-build:macro_rules.rs
+
+#![warn(clippy::empty_loop)]
+
+#[macro_use]
+extern crate macro_rules;
+
+fn should_trigger() {
+    loop {}
+    loop {
+        loop {}
+    }
+
+    'outer: loop {
+        'inner: loop {}
+    }
+}
+
+fn should_not_trigger() {
+    loop {
+        panic!("This is fine")
+    }
+    let ten_millis = std::time::Duration::from_millis(10);
+    loop {
+        std::thread::sleep(ten_millis)
+    }
+
+    #[allow(clippy::never_loop)]
+    'outer: loop {
+        'inner: loop {
+            break 'inner;
+        }
+        break 'outer;
+    }
+
+    // Make sure `allow` works for this lint
+    #[allow(clippy::empty_loop)]
+    loop {}
+
+    // We don't lint loops inside macros
+    macro_rules! foo {
+        () => {
+            loop {}
+        };
+    }
+
+    // We don't lint external macros
+    foofoo!()
+}
+
+fn main() {}