require File.expand_path(File.dirname(__FILE__) + '/../spec_helper')

describe "Dynamoid::Adapter" do
  
  before(:all) do
    Dynamoid::Adapter.create_table('dynamoid_tests_TestTable', :id) unless Dynamoid::Adapter.list_tables.include?('dynamoid_tests_TestTable')
  end
  
  it 'extends itself automatically' do
    lambda {Dynamoid::Adapter.list_tables}.should_not raise_error
  end
  
  it 'raises nomethod if we try a method that is not on the child' do
    lambda {Dynamoid::Adapter.foobar}.should raise_error
  end
  
  context 'without partioning' do
    before(:all) do
      @previous_value = Dynamoid::Config.partitioning
      Dynamoid::Config.partitioning = false
    end
    
    after(:all) do
      Dynamoid::Config.partitioning = @previous_value
    end
    
    it 'writes through the adapter' do
      Dynamoid::Adapter.expects(:put_item).with('dynamoid_tests_TestTable', {:id => '123'}).returns(true)

      Dynamoid::Adapter.write('dynamoid_tests_TestTable', {:id => '123'})
    end

    it 'reads through the adapter for one ID' do
      Dynamoid::Adapter.expects(:get_item).with('dynamoid_tests_TestTable', '123').returns(true)

      Dynamoid::Adapter.read('dynamoid_tests_TestTable', '123')
    end

    it 'reads through the adapter for many IDs' do
      Dynamoid::Adapter.expects(:batch_get_item).with({'dynamoid_tests_TestTable' => ['1', '2']}).returns(true)

      Dynamoid::Adapter.read('dynamoid_tests_TestTable', ['1', '2'])
    end
  end
  
  context 'with partitioning' do
    before(:all) do
      @previous_value = Dynamoid::Config.partitioning
      Dynamoid::Config.partitioning = true
    end
    
    after(:all) do
      Dynamoid::Config.partitioning = @previous_value
    end
    
    it 'writes through the adapter' do
      Random.expects(:rand).with(Dynamoid::Config.partition_size).once.returns(0)
      Dynamoid::Adapter.write('dynamoid_tests_TestTable', {:id => 'testid'})
    
      Dynamoid::Adapter.get_item('dynamoid_tests_TestTable', 'testid.0')[:id].should == 'testid.0'
      Dynamoid::Adapter.get_item('dynamoid_tests_TestTable', 'testid.0')[:updated_at].should_not be_nil
    end
  
    it 'reads through the adapter for one ID' do
      Dynamoid::Adapter.expects(:batch_get_item).with('dynamoid_tests_TestTable' => (0...Dynamoid::Config.partition_size).collect{|n| "123.#{n}"}).returns({})
    
      Dynamoid::Adapter.read('dynamoid_tests_TestTable', '123')
    end
  
    it 'reads through the adapter for many IDs' do
      Dynamoid::Adapter.expects(:batch_get_item).with('dynamoid_tests_TestTable' => (0...Dynamoid::Config.partition_size).collect{|n| "1.#{n}"} + (0...Dynamoid::Config.partition_size).collect{|n| "2.#{n}"}).returns({})
    
      Dynamoid::Adapter.read('dynamoid_tests_TestTable', ['1', '2'])
    end
  
    it 'returns an ID with all partitions' do
      Dynamoid::Adapter.id_with_partitions('1').should =~ (0...Dynamoid::Config.partition_size).collect{|n| "1.#{n}"}
    end
  
    it 'returns a result for one partitioned element' do
      @time = DateTime.now
      @array =[{:id => '1.0', :updated_at => @time - 6.hours}, {:id => '1.1', :updated_at => @time - 3.hours}, {:id => '1.2', :updated_at => @time - 1.hour}, {:id => '1.3', :updated_at => @time - 6.hours}, {:id => '2.0', :updated_at => @time}]
    
      Dynamoid::Adapter.result_for_partition(@array).should =~ [{:id => '1', :updated_at => @time - 1.hour}, {:id => '2', :updated_at => @time}]
    end
    
  end

end