$LOAD_PATH[0,0] = File.join(File.dirname(__FILE__), '..', 'lib')
require 'mongo'
require 'test/unit'

# NOTE: assumes Mongo is running
class CursorTest < Test::Unit::TestCase

  include XGen::Mongo::Driver

  @@db = Mongo.new(ENV['MONGO_RUBY_DRIVER_HOST'] || 'localhost',
                   ENV['MONGO_RUBY_DRIVER_PORT'] || Mongo::DEFAULT_PORT).db('ruby-mongo-test')
  @@coll = @@db.collection('test')

  def setup
    @@coll.clear
    @@coll.insert('a' => 1)     # collection not created until it's used
    @@coll_full_name = 'ruby-mongo-test.test'
  end

  def teardown
    @@coll.clear
  end

  def test_explain
    cursor = @@coll.find('a' => 1)
    explaination = cursor.explain
    assert_not_nil explaination['cursor']
    assert_kind_of Numeric, explaination['n']
    assert_kind_of Numeric, explaination['millis']
    assert_kind_of Numeric, explaination['nscanned']
  end

  def test_close_no_query_sent
    begin
      cursor = @@coll.find('a' => 1)
      cursor.close
      assert cursor.closed?
    rescue => ex
      fail ex.to_s
    end
  end

  def test_refill_via_get_more
    1000.times { |i|
      @@coll.insert('a' => i)
    }
    count = 0
    @@coll.find.each { |obj|
      count += obj['a']
    }

    # do the same thing again for debugging
    count2 = 0
    @@coll.find.each { |obj|
      count2 += obj['a']
    }

    assert_equal count, count2
    assert_equal 499501, count
  end

  def test_close_after_query_sent
    begin
      cursor = @@coll.find('a' => 1)
      cursor.next_object
      cursor.close
      assert cursor.closed?
    rescue => ex
      fail ex.to_s
    end
  end

end