public void setup() {
            initialization();
            SigninPage signinPage = new SigninPage();
        }

Here, you are assigning a *SiginPage* object to a *singinPage* **local** variable. This object is [eligible to be destroyed as soon as the method ends][1].


What you probably want to do is to assign this object to an **attribute**.

    this.signinPage = new SigninPage();

Attributes last as long as the object which holds them exists.

TestNG will instantiate a SigninPageTest object, call each one of the @Test methods, along with the hooks @Before/@After and only after the tests destroy the SigninPageTest object.



  [1]: https://stackoverflow.com/a/14352561/2252076