'L{dns.Record_SPF} instances compare equal if and only if they have the
same data and ttl.'

def test_spf(self):

    self._equalityTest(dns.Record_SPF('foo', 'bar', ttl=10), dns.Record_SPF('foo', 'bar', ttl=10), dns.Record_SPF('foo', 'bar', 'baz', ttl=10))
    self._equalityTest(dns.Record_SPF('foo', 'bar', ttl=10), dns.Record_SPF('foo', 'bar', ttl=10), dns.Record_SPF('bar', 'foo', ttl=10))
    self._equalityTest(dns.Record_SPF('foo', 'bar', ttl=10), dns.Record_SPF('foo', 'bar', ttl=10), dns.Record_SPF('foo', 'bar', ttl=100))
