gitlab-org--gitlab-foss/spec/lib/gitlab/utils/strong_memoize_spec.rb
Zeger-Jan van de Weg 428c38a2b1
Fix rubocop offence
2017-12-12 17:40:54 +01:00

64 lines
1.4 KiB
Ruby

require 'spec_helper'
describe Gitlab::Utils::StrongMemoize do
let(:klass) do
struct = Struct.new(:value) do
def method_name
strong_memoize(:method_name) do
trace << value
value
end
end
def trace
@trace ||= []
end
end
struct.include(described_class)
struct
end
subject(:object) { klass.new(value) }
shared_examples 'caching the value' do
it 'only calls the block once' do
value0 = object.method_name
value1 = object.method_name
expect(value0).to eq(value)
expect(value1).to eq(value)
expect(object.trace).to contain_exactly(value)
end
it 'returns and defines the instance variable for the exact value' do
returned_value = object.method_name
memoized_value = object.instance_variable_get(:@method_name)
expect(returned_value).to eql(value)
expect(memoized_value).to eql(value)
end
end
describe '#strong_memoize' do
[nil, false, true, 'value', 0, [0]].each do |value|
context "with value #{value}" do
let(:value) { value }
it_behaves_like 'caching the value'
end
end
end
describe '#clear_memoization' do
let(:value) { 'mepmep' }
it 'removes the instance variable' do
object.method_name
object.clear_memoization(:method_name)
expect(object.instance_variable_defined?(:@method_name)).to be(false)
end
end
end