dead_code_tests: add skip complete attrset test

src/dead_code_tests.rs

@@ -265,6 +265,16 @@ alive
     assert_eq!(results[0].binding.name.to_string(), "dead2");
 }
 
+#[test]
+fn skip_complete_attrset() {
+    let results = run("
+# deadnix: skip
+{ dead1,  dead2 }:
+alive
+    ");
+    assert_eq!(0, results.len());
+}
+
 #[test]
 fn skip_lambda_arg() {
     let results = run("