require 'spec_helper'

module Omnibus
  describe Config do
    subject { described_class.instance }

    it 'extends Util' do
      expect(subject).to be_a(Util)
    end

    before do
      # Don't expand paths on the build system. Otherwise, you will end up with
      # paths like +\\Users\\you\\Development\\omnibus-ruby\\C:/omnibus-ruby+
      # when testing on "other" operating systems
      allow(File).to receive(:expand_path) { |arg| arg }
    end

    shared_examples 'a configurable' do |id, default|
      it "responds to .#{id}" do
        expect(described_class).to respond_to(id)
      end

      it ".#{id} defaults to #{default.inspect}" do
        expect(described_class.send(id)).to eq(default)
      end

      it_behaves_like 'a cleanroom getter', id, default
      it_behaves_like 'a cleanroom setter', id, %|#{id}(#{default.inspect})|
    end

    include_examples 'a configurable', :base_dir, '/var/cache/omnibus'
    include_examples 'a configurable', :cache_dir, '/var/cache/omnibus/cache'
    include_examples 'a configurable', :git_cache_dir, '/var/cache/omnibus/cache/git_cache'
    include_examples 'a configurable', :source_dir, '/var/cache/omnibus/src'
    include_examples 'a configurable', :build_dir, '/var/cache/omnibus/build'
    include_examples 'a configurable', :package_dir, '/var/cache/omnibus/pkg'
    include_examples 'a configurable', :project_root, Dir.pwd
    include_examples 'a configurable', :local_software_dirs, []
    include_examples 'a configurable', :software_gems, ['omnibus-software']
    include_examples 'a configurable', :solaris_compiler, nil
    include_examples 'a configurable', :append_timestamp, true
    include_examples 'a configurable', :build_retries, 0
    include_examples 'a configurable', :use_git_caching, true
    include_examples 'a configurable', :fetcher_read_timeout, 60

    describe '#workers' do
      context 'when the Ohai data is not present' do
        before do
          stub_ohai(platform: 'ubuntu', version: '12.04') do |data|
            data['cpu'] = nil
          end
        end

        it 'defaults to 3' do
          expect(described_class.workers).to eq(3)
        end
      end

      context 'when the Ohai data is present' do
        before do
          stub_ohai(platform: 'ubuntu', version: '12.04') do |data|
            data['cpu'] = { 'total' => '5' }
          end
        end

        it 'defaults to the value + 6' do
          expect(described_class.workers).to eq(6)
        end
      end
    end

    context 'on Windows' do
      before { stub_ohai(platform: 'windows', version: '2012') }

      include_examples 'a configurable', :base_dir, 'C:/omnibus-ruby'
      include_examples 'a configurable', :cache_dir, 'C:/omnibus-ruby/cache'
      include_examples 'a configurable', :git_cache_dir, 'C:/omnibus-ruby/cache/git_cache'
      include_examples 'a configurable', :source_dir, 'C:/omnibus-ruby/src'
      include_examples 'a configurable', :build_dir, 'C:/omnibus-ruby/build'
      include_examples 'a configurable', :package_dir, 'C:/omnibus-ruby/pkg'
    end

    context 'when base_dir is changed' do
      before { described_class.base_dir('/foo/bar') }

      include_examples 'a configurable', :cache_dir, '/foo/bar/cache'
      include_examples 'a configurable', :git_cache_dir, '/foo/bar/cache/git_cache'
      include_examples 'a configurable', :source_dir, '/foo/bar/src'
      include_examples 'a configurable', :build_dir, '/foo/bar/build'
      include_examples 'a configurable', :package_dir, '/foo/bar/pkg'
    end
  end
end