from app.telemetry import parse_proc_net_dev

PROC_NET_DEV = """Inter-|   Receive                                                |  Transmit
 face |bytes    packets errs drop fifo frame compressed multicast|bytes    packets errs drop fifo colls carrier compressed
    lo: 1234567    1000    0    0    0     0          0         0  1234567    1000    0    0    0     0       0          0
  eth0: 9876543    5000    0    0    0     0          0         0  1111111    4000    0    0    0     0       0          0
"""


def test_parse_proc_net_dev_extracts_counters():
    counters = parse_proc_net_dev(PROC_NET_DEV)
    assert counters == {
        "lo": (1234567, 1234567),
        "eth0": (9876543, 1111111),
    }


def test_parse_proc_net_dev_ignores_malformed_lines():
    assert parse_proc_net_dev("garbage\nno colon here\n") == {}