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
|
# frozen_string_literal: true
require 'spec_helper'
describe Prometheus::ProxyService do
include ReactiveCachingHelpers
include PrometheusHelpers
let(:environment) { create(:environment) }
describe '#execute' do
let(:prometheus_adapter) { instance_double(PrometheusService) }
subject { described_class.new(environment, 'GET', 'query', { query: '1' }) }
context 'When prometheus_adapter is nil' do
before do
allow(environment).to receive(:prometheus_adapter).and_return(nil)
end
it 'should return error' do
expect(subject.execute).to eq({
status: :error,
message: 'No prometheus server found',
http_status: :service_unavailable
})
end
end
context 'When prometheus_adapter cannot query' do
before do
allow(environment).to receive(:prometheus_adapter).and_return(prometheus_adapter)
allow(prometheus_adapter).to receive(:can_query?).and_return(false)
end
it 'should return error' do
expect(subject.execute).to eq({
status: :error,
message: 'No prometheus server found',
http_status: :service_unavailable
})
end
end
context 'Cannot proxy' do
subject { described_class.new(environment, 'POST', 'query', { query: '1' }) }
it 'returns error' do
expect(subject.execute).to eq({
message: 'Proxy support for this API is not available currently',
status: :error
})
end
end
context 'When cached' do
# TODO: fix this spec
let(:return_value) { { 'http_status' => 200, 'body' => 'body' } }
let(:opts) { [environment.class.name, environment.id, 'GET', 'query', { 'query' => '1' }] }
before do
stub_reactive_cache(subject, return_value, opts)
allow(environment).to receive(:prometheus_adapter)
.and_return(prometheus_adapter)
allow(prometheus_adapter).to receive(:can_query?).and_return(true)
end
it 'returns cached value' do
result = subject.execute
expect(subject).not_to receive(:calculate_reactive_cache)
expect(result[:http_status]).to eq(return_value[:http_status])
expect(result[:body]).to eq(return_value[:body])
end
end
context 'When not cached' do
# TODO
end
context 'Call prometheus api' do
let(:prometheus_client) { instance_double(Gitlab::PrometheusClient) }
before do
synchronous_reactive_cache(subject)
allow(environment).to receive(:prometheus_adapter)
.and_return(prometheus_adapter)
allow(prometheus_adapter).to receive(:can_query?).and_return(true)
allow(prometheus_adapter).to receive(:prometheus_client_wrapper)
.and_return(prometheus_client)
end
context 'Connection to prometheus server succeeds' do
let(:rest_client_response) { instance_double(RestClient::Response) }
before do
allow(prometheus_client).to receive(:proxy).and_return(rest_client_response)
allow(rest_client_response).to receive(:code)
.and_return(prometheus_http_status_code)
allow(rest_client_response).to receive(:body).and_return(response_body)
end
shared_examples 'return prometheus http status code and body' do
it do
expect(subject.execute).to eq({
http_status: prometheus_http_status_code,
body: response_body,
status: :success
})
end
end
context 'prometheus returns success' do
let(:prometheus_http_status_code) { 200 }
let(:response_body) do
'{"status":"success","data":{"resultType":"scalar","result":[1553864609.117,"1"]}}'
end
before do
end
it_behaves_like 'return prometheus http status code and body'
end
context 'prometheus returns error' do
let(:prometheus_http_status_code) { 400 }
let(:response_body) do
'{"status":"error","errorType":"bad_data","error":"parse error at char 1: no expression found in input"}'
end
it_behaves_like 'return prometheus http status code and body'
end
end
context 'connection to prometheus server fails' do
context 'prometheus client raises Gitlab::PrometheusClient::Error' do
before do
allow(prometheus_client).to receive(:proxy)
.and_raise(Gitlab::PrometheusClient::Error, 'Network connection error')
end
it 'returns error' do
expect(subject.execute).to eq({
status: :error,
message: 'Network connection error',
http_status: :service_unavailable
})
end
end
end
end
end
describe '.from_cache' do
it 'initializes an instance of ProxyService class' do
result = described_class.from_cache(environment.class.name, environment.id, 'GET', 'query', { query: '1' })
expect(result).to be_an_instance_of(described_class)
expect(result.prometheus_owner).to eq(environment)
expect(result.method).to eq('GET')
expect(result.path).to eq('query')
expect(result.params).to eq({ query: '1' })
end
end
end
|
