1 files changed, 31 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui-internal/interning_literals.rs b/src/tools/clippy/tests/ui-internal/interning_literals.rs
new file mode 100644
index 00000000000..561fd5702a5
--- /dev/null
+++ b/src/tools/clippy/tests/ui-internal/interning_literals.rs
@@ -0,0 +1,31 @@
+#![allow(clippy::let_unit_value)]
+#![feature(rustc_private)]
+
+extern crate rustc_span;
+
+use clippy_utils::sym;
+use rustc_span::{Symbol, kw};
+
+fn main() {
+    let _ = Symbol::intern("f32");
+    //~^ interning_literals
+
+    // Correct suggestion when symbol isn't stringified constant name
+    let _ = Symbol::intern("proc-macro");
+    //~^ interning_literals
+
+    // Interning a keyword
+    let _ = Symbol::intern("self");
+    //~^ interning_literals
+
+    // Defined in clippy_utils
+    let _ = Symbol::intern("msrv");
+    //~^ interning_literals
+    let _ = Symbol::intern("Cargo.toml");
+    //~^ interning_literals
+
+    // Using a different `intern` function
+    let _ = intern("f32");
+}
+
+fn intern(_: &str) {}