engine.close();
        engine.close(); // second close should not throw
    }

    /**
     * Test that close() on a fresh engine (no evaluations) works
     */
    @Test
    public void test_close_noEvaluations() {
        final GroovyEngine engine = new GroovyEngine();
        engine.close();
    }

    // ===== Edge Cases =====

    /**
     * Test very long scripts
     */
    @Test