public Long getUsableSpace() {
        return usableSpace;
    }
@Test
    public void shouldInitializeTheFreeSpaceAtAgentSide() {
        AgentIdentifier id = new Agent("uuid", "localhost", "176.19.4.1").getAgentIdentifier();
        AgentRuntimeInfo agentRuntimeInfo = new AgentRuntimeInfo(id, AgentRuntimeStatus.Idle, currentWorkingDirectory(), "cookie");

        assertThat(agentRuntimeInfo.getUsableSpace(), is(not(0L)));
    }