def test_element_add_child_must_add_properly(complex_type, string_type):
name_elem = complex_type.children[0]
surname_elem = Element('Surname', element_type=string_type)
f = Element(name='Employee', element_type=complex_type)
f.add_child(surname_elem)
assert f.children == [name_elem, surname_elem]
def test_element_get_child_by_name(complex_type, string_type):
surname = Element('Surname', element_type=string_type)
f = Element(name='Employee', element_type=complex_type)
f.add_child(surname)
assert f.get_child_by_name('Surname') == surname
assert f.get_child_by_name('SurnameNotFound') is None