assertEquals("test error", e.getMessage());
        }
    }

    /**
     * Test that generic exceptions are caught and null is returned
     */
    @Test
    public void test_evaluate_genericExceptionReturnsNull() {
        final Map<String, Object> params = new HashMap<>();
        // Invalid script that will cause an exception
        assertNull(groovyEngine.evaluate("return nonExistentVariable", params));
    }