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Tests
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erikjohnston committed Sep 14, 2018
1 parent 0a81038 commit f6e82dc
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81 changes: 81 additions & 0 deletions tests/test_metrics.py
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# -*- coding: utf-8 -*-
# Copyright 2018 New Vector Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


from synapse.metrics import InFlightGauge

from tests import unittest


class TestMauLimit(unittest.TestCase):
def test_basic(self):
gauge = InFlightGauge(
"test1", "",
labels=["test_label"],
sub_metrics=["foo", "bar"],
)

def handle1(metrics):
metrics.foo += 2
metrics.bar = max(metrics.bar, 5)

def handle2(metrics):
metrics.foo += 3
metrics.bar = max(metrics.bar, 7)

gauge.register(("key1",), handle1)

self.assert_dict({
"test1_total": {("key1",): 1},
"test1_foo": {("key1",): 2},
"test1_bar": {("key1",): 5},
}, self.get_metrics_from_gauge(gauge))

gauge.unregister(("key1",), handle1)

self.assert_dict({
"test1_total": {("key1",): 0},
"test1_foo": {("key1",): 0},
"test1_bar": {("key1",): 0},
}, self.get_metrics_from_gauge(gauge))

gauge.register(("key1",), handle1)
gauge.register(("key2",), handle2)

self.assert_dict({
"test1_total": {("key1",): 1, ("key2",): 1},
"test1_foo": {("key1",): 2, ("key2",): 3},
"test1_bar": {("key1",): 5, ("key2",): 7},
}, self.get_metrics_from_gauge(gauge))

gauge.unregister(("key2",), handle2)
gauge.register(("key1",), handle2)

self.assert_dict({
"test1_total": {("key1",): 2, ("key2",): 0},
"test1_foo": {("key1",): 5, ("key2",): 0},
"test1_bar": {("key1",): 7, ("key2",): 0},
}, self.get_metrics_from_gauge(gauge))

def get_metrics_from_gauge(self, gauge):
results = {}

for r in gauge.collect():
results[r.name] = {
tuple(labels[x] for x in gauge.labels): value
for _, labels, value in r.samples
}

return results

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