You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: custom_select_test_methods.rb
    path of file: ./repos/activerecord-jdbc-adapter/test
    
    the code of the file until where you have to start completion: module CustomSelectTestMethods

  def test_custom_select_float
    model = DbType.create! :sample_float => 1.42
    model = DbType.where("id = #{model.id}").select('sample_float AS custom_sample_float').first
    assert_equal 1.42, model.custom_sample_
    
  def test_custom_select_datetime
    my_time = Time.local 2013, 03, 15, 19, 53, 51, 0 # usec
    model = DbType.create! :sample_datetime => my_time
    model = DbType.where("id = #{model.id}").select('sample_datetime AS custom_sample_datetime').first
    assert_equal my_time, model.custom_sample_datetime
    sample_datetime = model.custom_sample_datetime
    assert sample_datetime.acts_like?(:time), "expected Time-like instance but got: #{sample_datetime.class}"
  end