require File.expand_path(File.join(File.dirname(__FILE__), '..', '..',
                                   'test_helper'))
require 'new_relic/agent/database'
class NewRelic::Agent::DatabaseTest < Test::Unit::TestCase
  def teardown
    NewRelic::Agent::Database::Obfuscator.instance.reset
  end
  
  def test_process_resultset
    resultset = [["column"]]
    assert_equal([nil, [["column"]]],
                 NewRelic::Agent::Database.process_resultset(resultset))
  end
  
  def test_explain_sql_select_with_mysql_connection
    config = {:adapter => 'mysql'}
    config.default('val')
    sql = 'SELECT foo'
    connection = mock('connection')
    plan = {
      "select_type"=>"SIMPLE", "key_len"=>nil, "table"=>"blogs", "id"=>"1",
      "possible_keys"=>nil, "type"=>"ALL", "Extra"=>"", "rows"=>"2",
      "ref"=>nil, "key"=>nil
    }
    result = mock('explain plan')
    result.expects(:each_hash).yields(plan)
    # two rows, two columns
    connection.expects(:execute).with('EXPLAIN SELECT foo').returns(result)
    NewRelic::Agent::Database.expects(:get_connection).with(config).returns(connection)

    result = NewRelic::Agent::Database.explain_sql(sql, config)
    assert_equal(plan.keys.sort, result[0].sort)
    assert_equal(plan.values.compact.sort, result[1][0].compact.sort)    
  end

  def test_explain_sql_one_select_with_pg_connection
    config = {:adapter => 'postgresql'}
    config.default('val')
    sql = 'select count(id) from blogs limit 1'
    connection = mock('connection')
    plan = [{"QUERY PLAN"=>"Limit  (cost=11.75..11.76 rows=1 width=4)"},
            {"QUERY PLAN"=>"  ->  Aggregate  (cost=11.75..11.76 rows=1 width=4)"},
            {"QUERY PLAN"=>"        ->  Seq Scan on blogs  (cost=0.00..11.40 rows=140 width=4)"}]
    connection.expects(:execute).returns(plan)
    NewRelic::Agent::Database.expects(:get_connection).with(config).returns(connection)
    assert_equal([['QUERY PLAN'],
                  [["Limit  (cost=11.75..11.76 rows=1 width=4)"],
                   ["  ->  Aggregate  (cost=11.75..11.76 rows=1 width=4)"],
                   ["        ->  Seq Scan on blogs  (cost=0.00..11.40 rows=140 width=4)"]]],
                 NewRelic::Agent::Database.explain_sql(sql, config))
  end

  def test_explain_sql_no_sql
    assert_equal(nil, NewRelic::Agent::Database.explain_sql(nil, nil))
  end

  def test_explain_sql_no_connection_config
    assert_equal(nil, NewRelic::Agent::Database.explain_sql('select foo', nil))
  end

  def test_explain_sql_non_select
    assert_equal([], NewRelic::Agent::Database.explain_sql('foo',
                                                           mock('config')))
  end

  def test_explain_sql_one_select_no_connection
    # NB this test raises an error in the log, much as it might if a
    # user supplied a config that was not valid. This is generally
    # expected behavior - the get_connection method shouldn't allow
    # errors to percolate up.
    config = mock('config')
    config.stubs(:[]).returns(nil)
    assert_equal([], NewRelic::Agent::Database.explain_sql('SELECT', config))
  end  
  
  def test_handle_exception_in_explain
    fake_error = StandardError.new('a message')
    NewRelic::Control.instance.log.expects(:error).with('Error getting query plan: a message')
    # backtrace can be basically any string, just should get logged
    NewRelic::Control.instance.log.expects(:debug).with(instance_of(String))
    
    NewRelic::Agent::Database.handle_exception_in_explain do
      raise(fake_error)
    end
  end
  
  def test_obfuscation_mysql_basic
    insert = %q[INSERT INTO `X` values("test",0, 1 , 2, 'test')]
    assert_equal("INSERT INTO `X` values(?,?, ? , ?, ?)",
                 NewRelic::Agent::Database.obfuscate_sql(insert))
    select = %q[SELECT `table`.`column` FROM `table` WHERE `table`.`column` = 'value' AND `table`.`other_column` = "other value" LIMIT 1]
    assert_equal(%q[SELECT `table`.`column` FROM `table` WHERE `table`.`column` = ? AND `table`.`other_column` = ? LIMIT ?],
                 NewRelic::Agent::Database.obfuscate_sql(select))
  end

  def test_obfuscation_postgresql_basic
    insert = NewRelic::Agent::Database::Statement.new(%q[INSERT INTO "X" values('test',0, 1 , 2, 'test')])
    insert.adapter = :postgresql
    assert_equal('INSERT INTO "X" values(?,?, ? , ?, ?)',
                 NewRelic::Agent::Database.obfuscate_sql(insert))
    select = NewRelic::Agent::Database::Statement.new(%q[SELECT "table"."column" FROM "table" WHERE "table"."column" = 'value' AND "table"."other_column" = 'other value' LIMIT 1])
    select.adapter = :postgresql
    assert_equal(%q[SELECT "table"."column" FROM "table" WHERE "table"."column" = ? AND "table"."other_column" = ? LIMIT ?],
                 NewRelic::Agent::Database.obfuscate_sql(select))  
  end
  
  def test_obfuscation_escaped_literals
    insert = %q[INSERT INTO X values('', 'jim''s ssn',0, 1 , 'jim''s son''s son', """jim''s"" hat", "\"jim''s secret\"")]
    assert_equal("INSERT INTO X values(?, ?,?, ? , ?, ?, ?)",
                 NewRelic::Agent::Database.obfuscate_sql(insert))
  end

  def test_obfuscation_mysql_integers_in_identifiers
    select = %q[SELECT * FROM `table_007` LIMIT 1]
    assert_equal(%q[SELECT * FROM `table_007` LIMIT ?],
                 NewRelic::Agent::Database.obfuscate_sql(select))
  end
  
  def test_obfuscation_postgresql_integers_in_identifiers
    select = NewRelic::Agent::Database::Statement.new(%q[SELECT * FROM "table_007" LIMIT 1])
    select.adapter = :postgresql
    assert_equal(%q[SELECT * FROM "table_007" LIMIT ?],
                 NewRelic::Agent::Database.obfuscate_sql(select))
  end

  def test_sql_obfuscation_filters
    NewRelic::Agent::Database.set_sql_obfuscator(:replace) do |string|
      "1" + string
    end
    
    sql = "SELECT * FROM TABLE 123 'jim'"
    
    assert_equal "1" + sql, NewRelic::Agent::Database.obfuscate_sql(sql)
    
    NewRelic::Agent::Database.set_sql_obfuscator(:before) do |string|
      "2" + string
    end
    
    assert_equal "12" + sql, NewRelic::Agent::Database.obfuscate_sql(sql)
    
    NewRelic::Agent::Database.set_sql_obfuscator(:after) do |string|
      string + "3"
    end
    
    assert_equal "12" + sql + "3", NewRelic::Agent::Database.obfuscate_sql(sql)

    NewRelic::Agent::Database::Obfuscator.instance.reset
  end

  def test_close_connections_closes_all_held_db_connections
    foo_connection = mock('foo connection')
    bar_connection = mock('bar connection')
    NewRelic::Agent::Database::ConnectionManager.instance.instance_eval do
      @connections = { :foo => foo_connection, :bar => bar_connection }      
    end
    foo_connection.expects(:disconnect!)
    bar_connection.expects(:disconnect!)
    
    NewRelic::Agent::Database.close_connections
  end
end