require 'spec_helper'

describe Codependency::Graph do
  describe 'accessors' do
    subject { described_class.new 'planets/phobos.rb' }
    its( :path    ){ should eq( 'planets/phobos.rb' ) }
    its( :dirname ){ should eq( 'planets' ) }
    its( :extname ){ should eq( '.rb' ) }
    its( :options ){ should eq( { } ) }
  end

  describe 'populate', :files => :planets do
    subject { described_class.new './phobos.rb' }

    context 'initially' do
      it { should be_empty }
    end

    context 'after calling populate' do
      before { subject.populate }

      it { should include( './phobos.rb' => [ './body.rb', './mars.rb' ] ) }
      it { should include( './mars.rb'   => [ './planet.rb' ] ) }
      it { should include( './planet.rb' => [ './body.rb' ] ) }
      it { should include( './body.rb'   => [ ] ) }
    end

    it 'should return itself' do
      subject.populate.should == subject
    end
  end

  context 'planets', :files => :planets do
    subject { described_class.new start }

    context 'earth' do
      let( :start ){ './earth.rb' }
      its( :files ){ should eq( %w| ./body.rb ./planet.rb ./earth.rb | ) }
    end

    context 'phobos' do
      let( :start ){ './phobos.rb' }
      its( :files ){ should eq( %w| ./body.rb ./planet.rb ./mars.rb ./phobos.rb | ) }
    end
  end

  context 'breakfasts', :files => :breakfasts do
    subject { described_class.new start, :comment => '//' }

    context 'sandwich' do
      let( :start ){ './sandwich.js' }
      its( :files ){ should eq( %w| ./butter.js ./egg.js ./toast.js ./sandwich.js | ) }
    end
  end

  context 'circular dependencies', :files => :circular do
    subject { described_class.new start }

    let( :start ){ './money.rb' }

    it 'should raise an error' do
      expect { subject.files }.to raise_error( TSort::Cyclic )
    end
  end

  context 'subdirectories', :files => :subdirectories do
    subject { described_class.new start, :comment => '//' }

    context 'application.js' do
      let( :start ){ 'assets/application.js' }
      its( :files ){ should eq( %w| assets/templates/user/history.js assets/templates/user/account.js assets/templates/user.js assets/application.js | ) }
    end
  end
end