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# frozen_string_literal: true
require 'fast_spec_helper'
require 'active_support/concern'
RSpec.describe Gitlab::Utils::LazyAttributes do
subject(:klass) do
Class.new do
include Gitlab::Utils::LazyAttributes
lazy_attr_reader :number, type: Numeric
lazy_attr_reader :reader_1, :reader_2
lazy_attr_accessor :incorrect_type, :string_attribute, :accessor_2, type: String
def initialize
@number = -> { 1 }
@reader_1 = 'reader_1'
@reader_2 = -> { 'reader_2' }
@incorrect_type = -> { :incorrect_type }
@accessor_2 = -> { 'accessor_2' }
end
end
end
context 'class methods' do
it { is_expected.to respond_to(:lazy_attr_reader, :lazy_attr_accessor) }
it { is_expected.not_to respond_to(:define_lazy_reader, :define_lazy_writer) }
end
context 'instance methods' do
subject(:instance) { klass.new }
it do
is_expected.to respond_to(:number, :reader_1, :reader_2, :incorrect_type,
:incorrect_type=, :accessor_2, :accessor_2=,
:string_attribute, :string_attribute=)
end
context 'reading attributes' do
it 'returns the correct values for procs', :aggregate_failures do
expect(instance.number).to eq(1)
expect(instance.reader_2).to eq('reader_2')
expect(instance.accessor_2).to eq('accessor_2')
end
it 'does not return the value if the type did not match what was specified' do
expect(instance.incorrect_type).to be_nil
end
it 'only calls the block once even if it returned `nil`', :aggregate_failures do
expect(instance.instance_variable_get('@number')).to receive(:call).once.and_call_original
expect(instance.instance_variable_get('@accessor_2')).to receive(:call).once.and_call_original
expect(instance.instance_variable_get('@incorrect_type')).to receive(:call).once.and_call_original
2.times do
instance.number
instance.incorrect_type
instance.accessor_2
end
end
end
context 'writing attributes' do
it 'sets the correct values', :aggregate_failures do
instance.string_attribute = -> { 'updated 1' }
instance.accessor_2 = nil
expect(instance.string_attribute).to eq('updated 1')
expect(instance.accessor_2).to be_nil
end
end
end
end
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