scriptEngineFactory.add("testEngine", engine);

        // Verify engine is accessible by name
        ScriptEngine retrieved = scriptEngineFactory.getScriptEngine("testengine");
        assertNotNull(retrieved);
        assertEquals(engine, retrieved);

        // Verify engine is accessible by class simple name
        ScriptEngine retrievedByClass = scriptEngineFactory.getScriptEngine("testscriptengine");
        assertNotNull(retrievedByClass);

    public void test_register_caseInsensitive() {
        testScriptEngine.register();

        // Test various case combinations
        ScriptEngine lowerCase = scriptEngineFactory.getScriptEngine("testengine");
        ScriptEngine upperCase = scriptEngineFactory.getScriptEngine("TESTENGINE");
        ScriptEngine mixedCase = scriptEngineFactory.getScriptEngine("TestEngine");

        assertNotNull(lowerCase);
        assertNotNull(upperCase);