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# encoding: UTF-8
require 'prometheus/client'
require 'prometheus/client/histogram'
require 'examples/metric_example'
describe Prometheus::Client::Histogram do
before do
allow(Prometheus::Client.configuration).to receive(:multiprocess_files_dir).and_return('tmp/')
end
let(:histogram) do
described_class.new(:bar, 'bar description', {}, [2.5, 5, 10])
end
it_behaves_like Prometheus::Client::Metric do
let(:type) { Hash }
end
describe '#initialization' do
it 'raise error for unsorted buckets' do
expect do
described_class.new(:bar, 'bar description', {}, [5, 2.5, 10])
end.to raise_error ArgumentError
end
it 'raise error for accidentally missing out an argument' do
expect do
described_class.new(:bar, 'bar description', [5, 2.5, 10])
end.to raise_error Prometheus::Client::LabelSetValidator::InvalidLabelSetError
end
end
describe '#observe' do
it 'records the given value' do
expect do
histogram.observe({}, 5)
end.to change { histogram.get }
end
xit 'raise error for le labels' do
expect do
histogram.observe({ le: 1 }, 5)
end.to raise_error ArgumentError
end
end
describe '#get' do
before do
histogram.observe({ foo: 'bar' }, 3)
histogram.observe({ foo: 'bar' }, 5.2)
histogram.observe({ foo: 'bar' }, 13)
histogram.observe({ foo: 'bar' }, 4)
end
xit 'returns a set of buckets values' do
expect(histogram.get(foo: 'bar')).to eql(2.5 => 0, 5 => 2, 10 => 3)
end
xit 'returns a value which responds to #sum and #total' do
value = histogram.get(foo: 'bar')
expect(value.sum).to eql(25.2)
expect(value.total).to eql(4)
expect(value.total_inf).to eql(4)
end
xit 'uses zero as default value' do
expect(histogram.get({})).to eql(2.5 => 0, 5 => 0, 10 => 0)
end
end
xdescribe '#values' do
it 'returns a hash of all recorded summaries' do
histogram.observe({ status: 'bar' }, 3)
histogram.observe({ status: 'foo' }, 6)
expect(histogram.values).to eql(
{ status: 'bar' } => { 2.5 => 0, 5 => 1, 10 => 1 },
{ status: 'foo' } => { 2.5 => 0, 5 => 0, 10 => 1 },
)
end
end
end
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