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# frozen_string_literal: true
require 'fast_spec_helper'
require 'rspec-parameterized'
require 'active_support/testing/time_helpers'
RSpec.describe Gitlab::Ci::Runner::Backoff do
include ActiveSupport::Testing::TimeHelpers
describe '#duration' do
it 'returns backoff duration from start' do
freeze_time do
described_class.new(5.minutes.ago).then do |backoff|
expect(backoff.duration).to eq 5.minutes
end
end
end
it 'returns an integer value' do
freeze_time do
described_class.new(5.seconds.ago).then do |backoff|
expect(backoff.duration).to be 5
end
end
end
it 'returns the smallest number greater than or equal to duration' do
freeze_time do
described_class.new(0.5.seconds.ago).then do |backoff|
expect(backoff.duration).to be 1
end
end
end
end
describe '#slot' do
using RSpec::Parameterized::TableSyntax
where(:started, :slot) do
0 | 0
0.1 | 0
0.9 | 0
1 | 0
1.1 | 0
1.9 | 0
2 | 0
2.9 | 0
3 | 0
4 | 1
5 | 1
6 | 1
7 | 1
8 | 2
9 | 2
9.9 | 2
10 | 2
15 | 2
16 | 3
31 | 3
32 | 4
63 | 4
64 | 5
127 | 5
128 | 6
250 | 6
310 | 7
520 | 8
999 | 8
end
with_them do
it 'falls into an appropaite backoff slot' do
freeze_time do
backoff = described_class.new(started.seconds.ago)
expect(backoff.slot).to eq slot
end
end
end
end
describe '#to_seconds' do
using RSpec::Parameterized::TableSyntax
where(:started, :backoff) do
0 | 1
0.1 | 1
0.9 | 1
1 | 1
1.1 | 1
1.9 | 1
2 | 1
3 | 1
4 | 2
5 | 2
6 | 2
6.5 | 2
7 | 2
8 | 4
9 | 4
9.9 | 4
10 | 4
15 | 4
16 | 8
31 | 8
32 | 16
63 | 16
64 | 32
127 | 32
128 | 64
250 | 64
310 | 64
520 | 64
999 | 64
end
with_them do
it 'calculates backoff based on an appropriate slot' do
freeze_time do
described_class.new(started.seconds.ago).then do |delay|
expect(delay.to_seconds).to eq backoff
end
end
end
end
end
end
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