minor: silence some warning due to deprecaton

lib/mongo/collection.rb

@@ -260,7 +260,7 @@ module Mongo
     #   run the operation in safe mode, which run a getlasterror command on the
     #   database to report any assertion. In addition, a hash can be provided to
     #   run an fsync and/or wait for replication of the remove (>= 1.5.1). See the options
-    #   for DB#error.
+    #   for DB#get_last_error.
     #
     # @example remove all documents from the 'users' collection:
     #   users.remove

lib/mongo/connection.rb

@@ -398,7 +398,7 @@ module Mongo
     # @param [Hash] last_error_params parameters to be sent to getLastError. See DB#error for
     #   available options.
     #
-    # @see DB#error for valid last error params.
+    # @see DB#get_last_error for valid last error params.
     #
     # @return [Array]
     #   An array whose indexes include [0] documents returned, [1] number of document received,

test/collection_test.rb

@@ -1,4 +1,4 @@
-require 'test/test_helper'
+require './test/test_helper'
 
 class TestCollection < Test::Unit::TestCase
   @@connection ||= Connection.new(ENV['MONGO_RUBY_DRIVER_HOST'] || 'localhost', ENV['MONGO_RUBY_DRIVER_PORT'] || Connection::DEFAULT_PORT)

test/connection_test.rb

@@ -15,7 +15,7 @@ class TestConnection < Test::Unit::TestCase
   end
 
   def teardown
-    @mongo.db(MONGO_TEST_DB).error
+    @mongo[MONGO_TEST_DB].get_last_error
   end
 
   def test_slave_ok_with_multiple_nodes

test/db_api_test.rb

@@ -19,7 +19,7 @@ class DBAPITest < Test::Unit::TestCase
 
   def teardown
     @@coll.remove
-    @@db.error
+    @@db.get_last_error
   end
 
   def test_clear

test/db_test.rb

@@ -164,30 +164,30 @@ class DBTest < Test::Unit::TestCase
 
   def test_error
     @@db.reset_error_history
-    assert_nil @@db.error
+    assert_nil @@db.get_last_error['err']
     assert !@@db.error?
     assert_nil @@db.previous_error
 
     @@db.command({:forceerror => 1}, :check_response => false)
     assert @@db.error?
-    assert_not_nil @@db.error
+    assert_not_nil @@db.get_last_error['err']
     assert_not_nil @@db.previous_error
 
     @@db.command({:forceerror => 1}, :check_response => false)
     assert @@db.error?
-    assert @@db.error
+    assert @@db.get_last_error['err']
     prev_error = @@db.previous_error
     assert_equal 1, prev_error['nPrev']
-    assert_equal prev_error["err"], @@db.error
+    assert_equal prev_error["err"], @@db.get_last_error['err']
 
     @@db.collection('test').find_one
-    assert_nil @@db.error
+    assert_nil @@db.get_last_error['err']
     assert !@@db.error?
     assert @@db.previous_error
     assert_equal 2, @@db.previous_error['nPrev']
 
     @@db.reset_error_history
-    assert_nil @@db.error
+    assert_nil @@db.get_last_error['err']
     assert !@@db.error?
     assert_nil @@db.previous_error
   end