require 'spec_helper'

describe 'RubyVersionReader' do
  before :all do
    @remember_version = RUBY_VERSION
    capture_stderr{ RUBY_VERSION = '1.8.7' }
  end

  it 'should display RUBY_VERSION if called directly (to_s)' do
    RubyVersionReader.to_s.should == '1.8.7'
  end

  context 'with "is" method, with parameter' do
    it 'should check for main version (1.8 or 1.9) when Float paramater is given' do
      RubyVersionReader.is?( 1.8 ).should == true
      RubyVersionReader.is?( 1.9 ).should == false
    end

    it 'should check with string comparison if parameter is not Float' do
      RubyVersionReader.is?( '1.8' ).should == false
    end
  end

  context 'with "is" method, without parameter, but method chaining' do
    it 'should return a string for usage with comparison operators' do
      (RubyVersionReader.is > '1.8.7').should == false
      (RubyVersionReader <= '1.8.7').should == true
      (RubyVersionReader.is.between? '1.8.6', '1.8.7').should == true
    end

    it 'should create some handy compare aliases' do
      RubyVersionReader.is.above( '1.8.7' ).should == false
      RubyVersionReader.is.at_least( '1.8.7' ).should == true
      RubyVersionReader.is.exactly( '1.8.7' ).should == true
    end

    it 'also allows to check for the release dates' do
      RubyVersionReader.is.older_than( Date.today ).should == true
      RubyVersionReader.is.newer_than( '2000-01-01' ).should == true
    end
  end

  it 'should define some accessors' do
    RubyVersionReader.major.should == 1
    RubyVersionReader.minor.should == 8
    RubyVersionReader.tiny.should == 7
    RubyVersionReader.patchlevel.should == RUBY_PATCHLEVEL
    RubyVersionReader.description.should == RUBY_DESCRIPTION
  end

  context 'with "gemset" method' do
    it 'should return an empty string by default' do
      RubyVersionReader.gemset.should == ''
    end

    it 'should work with a .ruby-gemset file' do
      path = '.ruby-gemset'
      given_gemset_name = 'ruby_version_rspec_gemset'
      begin
        # Given
        File.open(path, 'w') { |file| file << given_gemset_name + "\n\n" }

        # When/Then
        RubyVersionReader.gemset.should == given_gemset_name
      ensure
        File.delete(path)
      end
    end

    it 'should work by calling `rvm info`' do
      given_gemset_name = 'ruby_version_rspec_gemset'

      Object.should_receive(:`) {
        YAML.dump({ 'ruby-version@ruby-gemset' => { 'environment' => { 'gemset' => given_gemset_name } } })
      }

      puts RubyVersionReader.gemset#.should == given_gemset_name
    end
  end

  after :all do
    capture_stderr{ RUBY_VERSION = @remember_version }
  end
end