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require_relative '../spec_helper'
describe DeviceDetector::MemoryCache do
let(:subject) { DeviceDetector::MemoryCache.new(config) }
let(:config) { {} }
describe '#set' do
describe 'string key' do
let(:key) { 'string' }
it 'sets the value under the key' do
subject.set(key, 'value')
subject.data[key].must_equal 'value'
end
end
describe 'array key' do
let(:key) { ['string1', 'string2'] }
it 'sets the value under the key' do
subject.set(key, 'value')
subject.data[String(key)].must_equal 'value'
end
end
end
describe '#get' do
describe 'string key' do
let(:key) { 'string' }
it 'gets the value for the key' do
subject.data[key] = 'value'
subject.get(key).must_equal 'value'
end
end
describe 'array key' do
let(:key) { ['string1', 'string2'] }
it 'gets the value for the key' do
subject.data[String(key)] = 'value'
subject.get(key).must_equal 'value'
end
end
end
describe '#get_or_set' do
let(:key) { 'string' }
describe 'value already present' do
it 'gets the value for the key from cache' do
subject.data[key] = 'value'
block_called = false
value = subject.get_or_set(key) do
block_called = true
end
value.must_equal 'value'
block_called.must_equal false
end
end
describe 'value not yet present' do
it 'evaluates the block and sets the result' do
block_called = false
subject.get_or_set(key) do
block_called = true
end
block_called.must_equal true
subject.data[key].must_equal true
end
end
end
describe 'cache purging' do
let(:config) { { max_cache_keys: 3 } }
it 'purges the cache when key size arrives at max' do
subject.set('1', 'foo')
subject.set('2', 'bar')
subject.set('3', 'baz')
subject.set('4', 'boz')
subject.data.keys.size.must_equal 3
end
end
end
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