def METHOD_NAME(topo):
    """Write your testcase here...
    Also, if you need any testcase initialization,
    please, write additional fixture for that(include finalizer).
    """
    # Add the branches
    try:
        topo.standalone.add_s(Entry((COS_BRANCH, {
            'objectclass': 'top extensibleObject'.split(),
            'ou': 'cos_scope'
        })))
    except ldap.LDAPError as e:
        log.error('Failed to add cos_scope: error ' + e.message['desc'])
        assert False
    try:
        topo.standalone.add_s(Entry((NO_COS_BRANCH, {
            'objectclass': 'top extensibleObject'.split(),
            'ou': 'no_cos_scope'
        })))
    except ldap.LDAPError as e:
        log.error('Failed to add no_cos_scope: error ' + e.message['desc'])
        assert False
    try:
        topo.standalone.add_s(Entry((COS_TEMPLATE, {
            'objectclass': 'top ldapsubentry costemplate extensibleObject'.split(),
            'cn': 'cos_template',
            'cosPriority': '1',
            'cn': 'cn=nsPwTemplateEntry,ou=level1,dc=example,dc=com',
            'mailAlternateAddress': 'hello@world'
        })))
    except ldap.LDAPError as e:
        log.error('Failed to add cos_template: error ' + e.message['desc'])
        assert False
    try:
        topo.standalone.add_s(Entry((COS_DEF, {
            'objectclass': 'top ldapsubentry cosSuperDefinition cosPointerDefinition'.split(),
            'cn': 'cos_definition',
            'costemplatedn': COS_TEMPLATE,
            'cosAttribute': 'mailAlternateAddress default'
        })))
    except ldap.LDAPError as e:
        log.error('Failed to add cos_definition: error ' + e.message['desc'])
        assert False
    try:
        # This entry is not allowed to have mailAlternateAddress
        topo.standalone.add_s(Entry((INVALID_USER_WITH_COS, {
            'objectclass': 'top person'.split(),
            'cn': 'cos_user_no_mail',
            'sn': 'cos_user_no_mail'
        })))
    except ldap.LDAPError as e:
        log.error('Failed to add cos_user_no_mail: error ' + e.message['desc'])
        assert False
    try:
        # This entry is allowed to have mailAlternateAddress
        topo.standalone.add_s(Entry((VALID_USER_WITH_COS, {
            'objectclass': 'top mailGroup'.split(),
            'cn': 'cos_user_with_mail'
        })))
    except ldap.LDAPError as e:
        log.error('Failed to add cos_user_no_mail: error ' + e.message['desc'])
        assert False
    try:
        # This entry is not allowed to have mailAlternateAddress
        topo.standalone.add_s(Entry((INVALID_USER_WITHOUT_COS, {
            'objectclass': 'top person'.split(),
            'cn': 'no_cos_user_no_mail',
            'sn': 'no_cos_user_no_mail'
        })))
    except ldap.LDAPError as e:
        log.error('Failed to add no_cos_user_no_mail: error ' + e.message['desc'])
        assert False
    try:
        # This entry is  allowed to have mailAlternateAddress
        topo.standalone.add_s(Entry((VALID_USER_WITHOUT_COS, {
            'objectclass': 'top mailGroup'.split(),
            'cn': 'no_cos_user_with_mail'
        })))
    except ldap.LDAPError as e:
        log.error('Failed to add no_cos_user_with_mail: error ' + e.message['desc'])
        assert False
    try:
        entries = topo.standalone.search_s(SUFFIX, ldap.SCOPE_SUBTREE, '(mailAlternateAddress=*)')
        assert len(entries) == 1
        assert entries[0].hasValue('mailAlternateAddress', 'hello@world')
    except ldap.LDAPError as e:
        log.fatal('Unable to retrieve cos_user_with_mail (only entry with mailAlternateAddress) : error %s' % (USER1_DN, e.message['desc']))
        assert False
    assert not topo.standalone.ds_error_log.match(".*cos attribute mailAlternateAddress failed schema.*")
    if DEBUGGING:
        # Add debugging steps(if any)...
        pass