Using utility class to build person

PersonTest.java

class PersonTest {
    @Test
    public void shouldReturnTrueForCorrectEmail() {
        Person person = TestUtil.aPerson(
                "John",
                "john@gmail.com",
                "888888",
                "888888"
        );

        boolean isValidEmail = person.isValidEmail();
        assertTrue(isValidEmail);
    }
}

class TestUtil {
    public static Person aPerson(
            String name,
            String email,
            String phoneNumber,
            String mobileNumber
    ) {
        return new Person(1,
                name,
                email,
                phoneNumber,
                mobileNumber,
                null,
                null);
    }
}