TestScriptEngine engine1 = new TestScriptEngine("first");
        TestScriptEngine engine2 = new TestScriptEngine("second");

        scriptEngineFactory.add("name1", engine1);
        scriptEngineFactory.add("name2", engine2);

        // Both engines have same class name, so second should replace first for class name lookup
        ScriptEngine retrievedByClass = scriptEngineFactory.getScriptEngine("testscriptengine");

        Map<String, Object> lastParams = testScriptEngine.getLastParams();
        assertNotNull(lastParams);
        assertEquals(scriptExecutor, lastParams.get("executor"));
    }

    public void test_execute_withMultipleEngines() {
        // Setup multiple script engines
        TestScriptEngine engine1 = new TestScriptEngine("engine1");
        TestScriptEngine engine2 = new TestScriptEngine("engine2");

        assertNotNull(retrievedByClassName);
        assertEquals(testScriptEngine, retrievedByClassName);
    }

    // Test register method with multiple engines
    public void test_register_multipleEngines() {
        TestScriptEngine engine1 = new TestScriptEngine("engine1");
        TestScriptEngine engine2 = new TestScriptEngine("engine2");

    private ScriptEngine scriptEngine;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        // Create a test implementation of ScriptEngine
        scriptEngine = new TestScriptEngine();
    }

    // Test evaluate method with valid template and parameters
    public void test_evaluate_withValidTemplateAndParams() {
        String template = "Hello ${name}";