83 lines
1.8 KiB
Ruby
83 lines
1.8 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require 'spec_helper'
|
|
|
|
RSpec.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 '#strong_memoized?' do
|
|
let(:value) { :anything }
|
|
|
|
subject { object.strong_memoized?(:method_name) }
|
|
|
|
it 'returns false if the value is uncached' do
|
|
is_expected.to be(false)
|
|
end
|
|
|
|
it 'returns true if the value is cached' do
|
|
object.method_name
|
|
|
|
is_expected.to be(true)
|
|
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
|