1 files changed, 61 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/useless_attribute.rs b/src/tools/clippy/tests/ui/useless_attribute.rs
new file mode 100644
index 00000000000..3422eace4ab
--- /dev/null
+++ b/src/tools/clippy/tests/ui/useless_attribute.rs
@@ -0,0 +1,61 @@
+// run-rustfix
+// aux-build:proc_macro_derive.rs
+
+#![warn(clippy::useless_attribute)]
+#![warn(unreachable_pub)]
+#![feature(rustc_private)]
+
+#[allow(dead_code)]
+#[cfg_attr(feature = "cargo-clippy", allow(dead_code))]
+#[rustfmt::skip]
+#[allow(unused_imports)]
+#[allow(unused_extern_crates)]
+#[macro_use]
+extern crate rustc_middle;
+
+#[macro_use]
+extern crate proc_macro_derive;
+
+// don't lint on unused_import for `use` items
+#[allow(unused_imports)]
+use std::collections;
+
+// don't lint on unused for `use` items
+#[allow(unused)]
+use std::option;
+
+// don't lint on deprecated for `use` items
+mod foo {
+    #[deprecated]
+    pub struct Bar;
+}
+#[allow(deprecated)]
+pub use foo::Bar;
+
+// This should not trigger the lint. There's lint level definitions inside the external derive
+// that would trigger the useless_attribute lint.
+#[derive(DeriveSomething)]
+struct Baz;
+
+// don't lint on unreachable_pub for `use` items
+mod a {
+    mod b {
+        #[allow(dead_code)]
+        #[allow(unreachable_pub)]
+        pub struct C {}
+    }
+
+    #[allow(unreachable_pub)]
+    pub use self::b::C;
+}
+
+fn test_indented_attr() {
+    #[allow(clippy::almost_swapped)]
+    use std::collections::HashSet;
+
+    let _ = HashSet::<u32>::default();
+}
+
+fn main() {
+    test_indented_attr();
+}