1 files changed, 49 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/pattern_type_mismatch/mutability.rs b/src/tools/clippy/tests/ui/pattern_type_mismatch/mutability.rs
new file mode 100644
index 000000000..55a8c2621
--- /dev/null
+++ b/src/tools/clippy/tests/ui/pattern_type_mismatch/mutability.rs
@@ -0,0 +1,49 @@
+#![allow(clippy::all)]
+#![warn(clippy::pattern_type_mismatch)]
+
+fn main() {}
+
+fn should_lint() {
+    let value = &Some(23);
+    match value {
+        Some(_) => (),
+        _ => (),
+    }
+
+    let value = &mut Some(23);
+    match value {
+        Some(_) => (),
+        _ => (),
+    }
+}
+
+fn should_not_lint() {
+    let value = &Some(23);
+    match value {
+        &Some(_) => (),
+        _ => (),
+    }
+    match *value {
+        Some(_) => (),
+        _ => (),
+    }
+
+    let value = &mut Some(23);
+    match value {
+        &mut Some(_) => (),
+        _ => (),
+    }
+    match *value {
+        Some(_) => (),
+        _ => (),
+    }
+
+    const FOO: &str = "foo";
+
+    fn foo(s: &str) -> i32 {
+        match s {
+            FOO => 1,
+            _ => 0,
+        }
+    }
+}