Implement a basic event dispatcher

This commit is contained in:
Thibault Jouan
2015-04-08 20:17:51 +00:00
parent 49fe77ddb1
commit 84ad217d5b
3 changed files with 72 additions and 0 deletions

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module Uh
module WM
RSpec.describe Dispatcher do
let(:hooks) { {} }
subject(:dispatcher) { described_class.new hooks }
describe '#[]' do
context 'when given key for existing hook' do
let(:hooks) { { hook_key: [:hook] } }
it 'returns registered hooks for this key' do
expect(dispatcher[:hook_key]).to eq [:hook]
end
end
context 'when given multiple keys for existing hook' do
let(:hooks) { { %i[hook key] => [:hook] } }
it 'returns registered hooks for this key' do
expect(dispatcher[:hook, :key]).to eq [:hook]
end
end
context 'when given key for unknown hook' do
it 'returns an empty array' do
expect(dispatcher[:unknown_hook]).to eq []
end
end
end
describe '#on' do
it 'registers given hook for given key' do
dispatcher.on(:hook_key) { :hook }
expect(dispatcher.hooks[:hook_key]).to be
end
it 'registers given hook for given multiple keys' do
dispatcher.on(:hook, :key) { :hook }
expect(dispatcher.hooks[%i[hook key]]).to be
end
end
end
end
end