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require "flipper/adapters/memory"
require "flipper/instrumenters/memory"
require "flipper/adapters/sync/synchronizer"
RSpec.describe Flipper::Adapters::Sync::Synchronizer do
let(:local) { Flipper::Adapters::Memory.new }
let(:remote) { Flipper::Adapters::Memory.new }
let(:local_flipper) { Flipper.new(local) }
let(:remote_flipper) { Flipper.new(remote) }
let(:instrumenter) { Flipper::Instrumenters::Memory.new }
subject { described_class.new(local, remote, instrumenter: instrumenter) }
it "instruments call" do
subject.call
expect(instrumenter.events_by_name("synchronizer_exception.flipper").size).to be(0)
events = instrumenter.events_by_name("synchronizer_call.flipper")
expect(events.size).to be(1)
end
it "raises errors by default" do
exception = StandardError.new
expect(remote).to receive(:get_all).and_raise(exception)
expect { subject.call }.to raise_error(exception)
end
context "when raise disabled" do
subject do
options = {
instrumenter: instrumenter,
raise: false,
}
described_class.new(local, remote, options)
end
it "does not raise, but instruments exceptions for visibility" do
exception = StandardError.new
expect(remote).to receive(:get_all).and_raise(exception)
expect { subject.call }.not_to raise_error
events = instrumenter.events_by_name("synchronizer_exception.flipper")
expect(events.size).to be(1)
event = events[0]
expect(event.payload[:exception]).to eq(exception)
end
end
describe '#call' do
it 'returns nothing' do
expect(subject.call).to be(nil)
expect(instrumenter.events_by_name("synchronizer_exception.flipper").size).to be(0)
end
it 'syncs each remote feature to local' do
remote_flipper.enable(:search)
remote_flipper.enable_percentage_of_time(:logging, 10)
subject.call
expect(instrumenter.events_by_name("synchronizer_exception.flipper").size).to be(0)
expect(local_flipper[:search].boolean_value).to eq(true)
expect(local_flipper[:logging].percentage_of_time_value).to eq(10)
expect(local_flipper.features.map(&:key).sort).to eq(%w(logging search))
end
it 'adds features in remote that are not in local' do
remote_flipper.add(:search)
subject.call
expect(instrumenter.events_by_name("synchronizer_exception.flipper").size).to be(0)
expect(local_flipper.features.map(&:key)).to eq(["search"])
end
it 'removes features in local that are not in remote' do
local_flipper.add(:stats)
subject.call
expect(instrumenter.events_by_name("synchronizer_exception.flipper").size).to be(0)
expect(local_flipper.features.map(&:key)).to eq([])
end
end
end
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