1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Cache::Metrics do
subject(:metrics) do
described_class.new(
caller_id: caller_id,
cache_identifier: cache_identifier,
feature_category: feature_category,
backing_resource: backing_resource
)
end
let(:caller_id) { 'caller-id' }
let(:cache_identifier) { 'ApplicationController#show' }
let(:feature_category) { :source_code_management }
let(:backing_resource) { :unknown }
let(:counter_mock) { instance_double(Prometheus::Client::Counter) }
before do
allow(Gitlab::Metrics).to receive(:counter)
.with(
:redis_hit_miss_operations_total,
'Hit/miss Redis cache counter'
).and_return(counter_mock)
end
describe '#initialize' do
context 'when backing resource is not supported' do
let(:backing_resource) { 'foo' }
it { expect { metrics }.to raise_error(RuntimeError) }
context 'when on production' do
before do
allow(Gitlab).to receive(:dev_or_test_env?).and_return(false)
end
it 'does not raise an exception' do
expect { metrics }.not_to raise_error
end
end
end
end
describe '#increment_cache_hit' do
subject { metrics.increment_cache_hit }
it 'increments number of hits' do
expect(counter_mock)
.to receive(:increment)
.with(
{
caller_id: caller_id,
cache_identifier: cache_identifier,
feature_category: feature_category,
backing_resource: backing_resource,
cache_hit: true
}
).once
subject
end
end
describe '#increment_cache_miss' do
subject { metrics.increment_cache_miss }
it 'increments number of misses' do
expect(counter_mock)
.to receive(:increment)
.with(
{
caller_id: caller_id,
cache_identifier: cache_identifier,
feature_category: feature_category,
backing_resource: backing_resource,
cache_hit: false
}
).once
subject
end
end
describe '#observe_cache_generation' do
subject do
metrics.observe_cache_generation { action }
end
let(:action) { 'action' }
let(:histogram_mock) { instance_double(Prometheus::Client::Histogram) }
before do
allow(Gitlab::Metrics::System).to receive(:monotonic_time).and_return(100.0, 500.0)
end
it 'updates histogram metric' do
expect(Gitlab::Metrics).to receive(:histogram).with(
:redis_cache_generation_duration_seconds,
'Duration of Redis cache generation',
{
caller_id: caller_id,
cache_identifier: cache_identifier,
feature_category: feature_category,
backing_resource: backing_resource
},
[0, 1, 5]
).and_return(histogram_mock)
expect(histogram_mock).to receive(:observe).with({}, 400.0)
is_expected.to eq(action)
end
end
end
|
