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#
# Author:: Lamont Granquist (<lamont@chef.io>)
# Copyright:: Copyright (c) Chef Software Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require "spec_helper"
describe Chef::Decorator::LazyArray do
def foo
@foo ||= 1
end
def bar
@bar ||= 2
end
let(:decorator) do
Chef::Decorator::LazyArray.new { [ foo, bar ] }
end
it "behaves like an array" do
expect(decorator[0]).to eql(1)
expect(decorator[1]).to eql(2)
end
it "accessing the array elements is lazy" do
expect(decorator[0].class).to eql(Chef::Decorator::Lazy)
expect(decorator[1].class).to eql(Chef::Decorator::Lazy)
expect(@foo).to be nil
expect(@bar).to be nil
end
it "calling a method on the array element runs the proc (and both elements are autovivified)" do
expect(decorator[0].nil?).to be false
expect(@foo).to equal(1)
expect(@bar).to equal(2)
end
it "if we loop over the elements and do nothing then its not lazy" do
# we don't know how many elements there are unless we evaluate the proc
decorator.each { |i| }
expect(@foo).to equal(1)
expect(@bar).to equal(2)
end
end
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