'`agent_payload` property returns a single agent_payload
with the content of data and metadata payloads.'

def test_payload_property(self):

    agent_payload = AgentPayload()
    payload = {}
    DATA_KEYS = ['key1', 'key2']
    META_KEYS = list(AgentPayload.METADATA_KEYS)[:2]
    DUP_KEYS = list(AgentPayload.DUPLICATE_KEYS)[:2]
    for k in ((DATA_KEYS + META_KEYS) + DUP_KEYS):
        agent_payload[k] = 'value'
        payload[k] = 'value'
    self.assertEquals(agent_payload.payload, payload, agent_payload)
