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require 'spec_helper'
describe Gitlab::Config::Entry::Simplifiable do
describe '.strategy' do
let(:entry) do
Class.new(described_class) do
strategy :Something, if: -> { 'condition' }
strategy :DifferentOne, if: -> { 'condition' }
end
end
it 'defines entry strategies' do
expect(entry.strategies.size).to eq 2
expect(entry.strategies.map(&:name))
.to eq %i[Something DifferentOne]
end
end
describe 'setting strategy by a condition' do
let(:first) { double('first strategy') }
let(:second) { double('second strategy') }
let(:unknown) { double('unknown strategy') }
before do
stub_const("#{described_class.name}::Something", first)
stub_const("#{described_class.name}::DifferentOne", second)
stub_const("#{described_class.name}::UnknownStrategy", unknown)
end
context 'when first strategy should be used' do
let(:entry) do
Class.new(described_class) do
strategy :Something, if: -> (arg) { arg == 'something' }
strategy :DifferentOne, if: -> (*) { false }
end
end
it 'attemps to load a first strategy' do
expect(first).to receive(:new).with('something', anything)
entry.new('something')
end
end
context 'when second strategy should be used' do
let(:entry) do
Class.new(described_class) do
strategy :Something, if: -> (arg) { arg == 'something' }
strategy :DifferentOne, if: -> (arg) { arg == 'test' }
end
end
it 'attemps to load a second strategy' do
expect(second).to receive(:new).with('test', anything)
entry.new('test')
end
end
context 'when neither one is a valid strategy' do
let(:entry) do
Class.new(described_class) do
strategy :Something, if: -> (*) { false }
strategy :DifferentOne, if: -> (*) { false }
end
end
it 'instantiates an unknown strategy' do
expect(unknown).to receive(:new).with('test', anything)
entry.new('test')
end
end
end
context 'when a unknown strategy class is not defined' do
let(:entry) do
Class.new(described_class) do
strategy :String, if: -> (*) { true }
end
end
it 'raises an error when being initialized' do
expect { entry.new('something') }
.to raise_error ArgumentError, /UndefinedStrategy not available!/
end
end
end
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