minitor/tests/monitor_test.py

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from datetime import datetime
from unittest.mock import patch
import pytest
from minitor.main import InvalidMonitorException
from minitor.main import MinitorAlert
from minitor.main import Monitor
from minitor.main import validate_monitor_settings
from tests.util import assert_called_once
class TestMonitor(object):
@pytest.fixture
def monitor(self):
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return Monitor(
{
"name": "Sample Monitor",
"command": ["echo", "foo"],
"alert_down": ["log"],
"alert_up": ["log"],
"check_interval": 1,
"alert_after": 1,
"alert_every": 1,
}
)
@pytest.mark.parametrize(
"settings",
[
{"alert_after": 0},
{"alert_every": 0},
{"check_interval": 0},
{"alert_after": "invalid"},
{"alert_every": "invalid"},
{"check_interval": "invalid"},
],
)
def test_monitor_invalid_configuration(self, settings):
with pytest.raises(InvalidMonitorException):
validate_monitor_settings(settings)
@pytest.mark.parametrize(
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"alert_after",
[1, 20],
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ids=lambda arg: "alert_after({})".format(arg),
)
@pytest.mark.parametrize(
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"alert_every",
[-1, 1, 2, 1440],
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ids=lambda arg: "alert_every({})".format(arg),
)
def test_monitor_alert_after(self, monitor, alert_after, alert_every):
monitor.alert_after = alert_after
monitor.alert_every = alert_every
# fail a bunch of times before the final failure
for _ in range(alert_after - 1):
monitor.failure()
# this time should raise an alert
with pytest.raises(MinitorAlert):
monitor.failure()
@pytest.mark.parametrize(
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"alert_after",
[1, 20],
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ids=lambda arg: "alert_after({})".format(arg),
)
@pytest.mark.parametrize(
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"alert_every",
[1, 2, 1440],
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ids=lambda arg: "alert_every({})".format(arg),
)
def test_monitor_alert_every(self, monitor, alert_after, alert_every):
monitor.alert_after = alert_after
monitor.alert_every = alert_every
# fail a bunch of times before the final failure
for _ in range(alert_after - 1):
monitor.failure()
# this time should raise an alert
with pytest.raises(MinitorAlert):
monitor.failure()
# fail a bunch more times until the next alert
for _ in range(alert_every - 1):
monitor.failure()
# this failure should alert now
with pytest.raises(MinitorAlert):
monitor.failure()
def test_monitor_alert_every_exponential(self, monitor):
monitor.alert_after = 1
monitor.alert_every = -1
failure_count = 16
expect_failures_on = {1, 2, 4, 8, 16}
for i in range(failure_count):
if i + 1 in expect_failures_on:
with pytest.raises(MinitorAlert):
monitor.failure()
else:
monitor.failure()
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@pytest.mark.parametrize("last_check", [None, datetime(2018, 4, 10)])
def test_monitor_should_check(self, monitor, last_check):
monitor.last_check = last_check
assert monitor.should_check()
def test_monitor_check_fail(self, monitor):
assert monitor.last_output is None
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with patch.object(monitor, "failure") as mock_failure:
monitor.command = ["ls", "--not-real"]
assert not monitor.check()
assert_called_once(mock_failure)
assert monitor.last_output is not None
def test_monitor_check_success(self, monitor):
assert monitor.last_output is None
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with patch.object(monitor, "success") as mock_success:
assert monitor.check()
assert_called_once(mock_success)
assert monitor.last_output is not None
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@pytest.mark.parametrize("failure_count", [0, 1])
def test_monitor_success(self, monitor, failure_count):
monitor.alert_count = 0
monitor.total_failure_count = failure_count
assert monitor.last_success is None
monitor.success()
assert monitor.alert_count == 0
assert monitor.last_success is not None
assert monitor.total_failure_count == 0
def test_monitor_success_back_up(self, monitor):
monitor.total_failure_count = 1
monitor.alert_count = 1
with pytest.raises(MinitorAlert):
monitor.success()
assert monitor.alert_count == 0
assert monitor.last_success is not None
assert monitor.total_failure_count == 0