139 lines
3.8 KiB
Ruby
139 lines
3.8 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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describe Grafana::ProxyService do
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include ReactiveCachingHelpers
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let_it_be(:project) { create(:project) }
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let_it_be(:grafana_integration) { create(:grafana_integration, project: project) }
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let(:proxy_path) { 'api/v1/query_range' }
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let(:datasource_id) { '1' }
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let(:query_params) do
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{
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'query' => 'rate(relevant_metric)',
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'start' => '1570441248',
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'end' => '1570444848',
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'step' => '900'
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}
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end
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let(:cache_params) { [project.id, datasource_id, proxy_path, query_params] }
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let(:service) do
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described_class.new(project, datasource_id, proxy_path, query_params)
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end
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shared_examples_for 'initializes an instance' do
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it 'initializes an instance of ProxyService class' do
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expect(subject).to be_an_instance_of(described_class)
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expect(subject.project).to eq(project)
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expect(subject.datasource_id).to eq('1')
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expect(subject.proxy_path).to eq('api/v1/query_range')
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expect(subject.query_params).to eq(query_params)
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end
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end
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describe '.from_cache' do
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subject { described_class.from_cache(*cache_params) }
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it_behaves_like 'initializes an instance'
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end
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describe '#initialize' do
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subject { service }
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it_behaves_like 'initializes an instance'
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end
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describe '#execute' do
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subject(:result) { service.execute }
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context 'when grafana integration is not configured' do
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before do
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allow(project).to receive(:grafana_integration).and_return(nil)
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end
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it 'returns error' do
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expect(result).to eq(
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status: :error,
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message: 'Proxy support for this API is not available currently'
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)
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end
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end
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context 'with caching', :use_clean_rails_memory_store_caching do
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context 'when value not present in cache' do
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it 'returns nil' do
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expect(ExternalServiceReactiveCachingWorker)
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.to receive(:perform_async)
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.with(service.class, service.id, *cache_params)
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expect(result).to eq(nil)
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end
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end
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context 'when value present in cache' do
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let(:return_value) { { 'http_status' => 200, 'body' => 'body' } }
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before do
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stub_reactive_cache(service, return_value, cache_params)
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end
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it 'returns cached value' do
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expect(ReactiveCachingWorker)
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.not_to receive(:perform_async)
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.with(service.class, service.id, *cache_params)
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expect(result[:http_status]).to eq(return_value[:http_status])
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expect(result[:body]).to eq(return_value[:body])
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end
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end
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end
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context 'call prometheus api' do
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let(:client) { service.send(:client) }
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before do
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synchronous_reactive_cache(service)
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end
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context 'connection to grafana datasource succeeds' do
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let(:response) { instance_double(Gitlab::HTTP::Response) }
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let(:status_code) { 400 }
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let(:body) { 'body' }
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before do
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allow(client).to receive(:proxy_datasource).and_return(response)
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allow(response).to receive(:code).and_return(status_code)
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allow(response).to receive(:body).and_return(body)
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end
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it 'returns the http status code and body from prometheus' do
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expect(result).to eq(
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http_status: status_code,
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body: body,
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status: :success
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)
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end
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end
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context 'connection to grafana datasource fails' do
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before do
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allow(client).to receive(:proxy_datasource)
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.and_raise(Grafana::Client::Error, 'Network connection error')
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end
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it 'returns error' do
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expect(result).to eq(
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status: :error,
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message: 'Network connection error',
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http_status: :service_unavailable
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)
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end
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end
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end
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end
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end
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