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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Metrics::Exporter::BaseExporter do
let(:exporter) { described_class.new }
let(:log_filename) { File.join(Rails.root, 'log', 'sidekiq_exporter.log') }
let(:settings) { double('settings') }
before do
allow_any_instance_of(described_class).to receive(:log_filename).and_return(log_filename)
allow_any_instance_of(described_class).to receive(:settings).and_return(settings)
end
describe 'when exporter is enabled' do
before do
allow(::WEBrick::HTTPServer).to receive(:new).with(
Port: anything,
BindAddress: anything,
Logger: anything,
AccessLog: anything
).and_call_original
allow(settings).to receive(:enabled).and_return(true)
allow(settings).to receive(:port).and_return(0)
allow(settings).to receive(:address).and_return('127.0.0.1')
end
after do
exporter.stop
end
describe 'when exporter is stopped' do
describe '#start' do
it 'starts the exporter' do
expect_any_instance_of(::WEBrick::HTTPServer).to receive(:start)
expect { exporter.start.join }.to change { exporter.thread? }.from(false).to(true)
end
describe 'with custom settings' do
let(:port) { 99999 }
let(:address) { 'sidekiq_exporter_address' }
before do
allow(settings).to receive(:port).and_return(port)
allow(settings).to receive(:address).and_return(address)
end
it 'starts server with port and address from settings' do
expect(::WEBrick::HTTPServer).to receive(:new).with(
Port: port,
BindAddress: address,
Logger: anything,
AccessLog: anything
).and_wrap_original do |m, *args|
m.call(DoNotListen: true, Logger: args.first[:Logger])
end
allow_any_instance_of(::WEBrick::HTTPServer).to receive(:start)
exporter.start.join
end
end
describe 'when thread is not alive' do
it 'does close listeners' do
expect_any_instance_of(::WEBrick::HTTPServer).to receive(:start)
expect_any_instance_of(::WEBrick::HTTPServer).to receive(:listeners)
.and_call_original
expect { exporter.start.join }.to change { exporter.thread? }.from(false).to(true)
exporter.stop
end
end
end
describe '#stop' do
it "doesn't shutdown stopped server" do
expect_any_instance_of(::WEBrick::HTTPServer).not_to receive(:shutdown)
expect { exporter.stop }.not_to change { exporter.thread? }
end
end
end
describe 'when exporter is running' do
before do
exporter.start
end
describe '#start' do
it "doesn't start running server" do
expect_any_instance_of(::WEBrick::HTTPServer).not_to receive(:start)
expect { exporter.start }.not_to change { exporter.thread? }
end
end
describe '#stop' do
it 'shutdowns server' do
expect_any_instance_of(::WEBrick::HTTPServer).to receive(:shutdown)
expect { exporter.stop }.to change { exporter.thread? }.from(true).to(false)
end
end
end
end
describe 'request handling' do
using RSpec::Parameterized::TableSyntax
where(:method_class, :path, :http_status) do
Net::HTTP::Get | '/metrics' | 200
Net::HTTP::Get | '/liveness' | 200
Net::HTTP::Get | '/readiness' | 200
Net::HTTP::Get | '/' | 404
end
before do
allow(settings).to receive(:enabled).and_return(true)
allow(settings).to receive(:port).and_return(0)
allow(settings).to receive(:address).and_return('127.0.0.1')
# We want to wrap original method
# and run handling of requests
# in separate thread
allow_any_instance_of(::WEBrick::HTTPServer)
.to receive(:start).and_wrap_original do |m, *args|
Thread.new do
m.call(*args)
rescue IOError
# is raised as we close listeners
end
end
exporter.start.join
end
after do
exporter.stop
end
with_them do
let(:config) { exporter.server.config }
let(:request) { method_class.new(path) }
it 'responds with proper http_status' do
http = Net::HTTP.new(config[:BindAddress], config[:Port])
response = http.request(request)
expect(response.code).to eq(http_status.to_s)
end
end
end
describe 'when exporter is disabled' do
before do
allow(settings).to receive(:enabled).and_return(false)
end
describe '#start' do
it "doesn't start" do
expect_any_instance_of(::WEBrick::HTTPServer).not_to receive(:start)
expect(exporter.start).to be_nil
expect { exporter.start }.not_to change { exporter.thread? }
end
end
describe '#stop' do
it "doesn't shutdown" do
expect_any_instance_of(::WEBrick::HTTPServer).not_to receive(:shutdown)
expect { exporter.stop }.not_to change { exporter.thread? }
end
end
end
end
|