1 files changed, 39 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui-internal/match_type_on_diag_item.rs b/src/tools/clippy/tests/ui-internal/match_type_on_diag_item.rs
new file mode 100644
index 000000000..4b41ff15e
--- /dev/null
+++ b/src/tools/clippy/tests/ui-internal/match_type_on_diag_item.rs
@@ -0,0 +1,39 @@
+#![deny(clippy::internal)]
+#![allow(clippy::missing_clippy_version_attribute)]
+#![feature(rustc_private)]
+
+extern crate clippy_utils;
+extern crate rustc_hir;
+extern crate rustc_lint;
+extern crate rustc_middle;
+
+#[macro_use]
+extern crate rustc_session;
+use clippy_utils::{paths, ty::match_type};
+use rustc_hir::Expr;
+use rustc_lint::{LateContext, LateLintPass};
+use rustc_middle::ty::Ty;
+
+declare_lint! {
+    pub TEST_LINT,
+    Warn,
+    ""
+}
+
+declare_lint_pass!(Pass => [TEST_LINT]);
+
+static OPTION: [&str; 3] = ["core", "option", "Option"];
+
+impl<'tcx> LateLintPass<'tcx> for Pass {
+    fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr) {
+        let ty = cx.typeck_results().expr_ty(expr);
+
+        let _ = match_type(cx, ty, &OPTION);
+        let _ = match_type(cx, ty, &["core", "result", "Result"]);
+
+        let rc_path = &["alloc", "rc", "Rc"];
+        let _ = clippy_utils::ty::match_type(cx, ty, rc_path);
+    }
+}
+
+fn main() {}