Fix units bug with involuteCircular (#6711)

Signed-off-by: Nick Cameron <nrc@ncameron.org>

rust/kcl-lib/src/simulation_tests.rs

@@ -2708,3 +2708,24 @@ mod clone_w_shell {
         super::execute(TEST_NAME, true).await
     }
 }
+mod involute_circular_units {
+    const TEST_NAME: &str = "involute_circular_units";
+
+    /// Test parsing KCL.
+    #[test]
+    fn parse() {
+        super::parse(TEST_NAME)
+    }
+
+    /// Test that parsing and unparsing KCL produces the original KCL input.
+    #[tokio::test(flavor = "multi_thread")]
+    async fn unparse() {
+        super::unparse(TEST_NAME).await
+    }
+
+    /// Test that KCL is executed correctly.
+    #[tokio::test(flavor = "multi_thread")]
+    async fn kcl_test_execute() {
+        super::execute(TEST_NAME, true).await
+    }
+}