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require 'spec_helper'
RSpec.describe Jaeger::Samplers::RemoteControlled::InstructionsFetcher do
let(:fetcher) { described_class.new(host: host, port: port, service_name: service_name) }
let(:host) { 'some-host' }
let(:port) { 1234 }
let(:service_name) { 'test-service' }
it 'returns parsed response on success' do
body = { 'foo' => 'bar' }
serialized_body = body.to_json
stub_request(:get, "http://#{host}:#{port}/sampling?service=#{service_name}")
.to_return(status: 200, body: serialized_body, headers: {})
expect(fetcher.fetch).to eq(body)
end
it 'raises FetchFailed when http code is not 2xx' do
stub_request(:get, "http://#{host}:#{port}/sampling?service=#{service_name}")
.to_return(status: 400, body: 'Bad Request', headers: {})
expect { fetcher.fetch }
.to raise_error(described_class::FetchFailed, 'Unsuccessful response (code=400)')
end
it 'raises FetchFailed when request throws an exception' do
stub_request(:get, "http://#{host}:#{port}/sampling?service=#{service_name}")
.to_raise(StandardError.new('some error'))
expect { fetcher.fetch }
.to raise_error(described_class::FetchFailed, '#<StandardError: some error>')
end
end
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