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Shoulda + FactoryGirl: Can I make my tests faster?

I am looking for a way to speed up my Shoulda + FactoryGirl .

The model I'm trying to test ( StudentExam) has associations with other models. These related objects must exist before I can create StudentExam. For this reason they are created in setup.

However, one of our models ( School) takes considerable time to create. Since setupcalls to each operator should, the entire test case takes eons to accomplish - it creates a new @school, @student, @topicand @examfor each executable statement.

I am looking for a way to create these objects once and only once. Is there something like a method startupfor before_allthat would allow me to create entries that will be saved in the rest of the test case?

Basically I am looking for something like RSpec before (: all) . I'm not interested in the dependency problem, as these tests will never modify these expensive objects.

Here is a test case example. Apologies for the long code (I also created gist ):

# A StudentExam represents an Exam taken by a Student.
# It records the start/stop time, room number, etc.
class StudentExamTest < ActiveSupport::TestCase

  should_belong_to :student
  should_belong_to :exam

  setup do
    # These objects need to be created before we can create a StudentExam.  Tests will NOT modify these objects.
    # @school is a very time-expensive model to create (associations, external API calls, etc).
    # We need a way to create the @school *ONCE* -- there no need to recreate it for every single test.
    @school = Factory(:school)
    @student = Factory(:student, :school => @school)
    @topic = Factory(:topic, :school => @school)
    @exam = Factory(:exam, :topic => @topic)
  end

  context "A StudentExam" do

    setup do
      @student_exam = Factory(:student_exam, :exam => @exam, :student => @student, :room_number => "WB 302")
    end

    should "take place at 'Some School'" do
      assert_equal @student_exam, 'Some School'
    end

    should "be in_progress? when created" do
      assert @student_exam.in_progress?
    end

    should "not be in_progress? when finish! is called" do
      @student_exam.finish!
      assert !@student_exam.in_progress
    end

  end

end
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4 answers

, . , .

# A StudentExam represents an Exam taken by a Student.
# It records the start/stop time, room number, etc.
class StudentExamTest < ActiveSupport::TestCase

  should_belong_to :student
  should_belong_to :exam

  # These objects need to be created before we can create a StudentExam.  Tests will NOT modify these objects.
  # @school is a very time-expensive model to create (associations, external API calls, etc).
  # We need a way to create the @school *ONCE* -- there no need to recreate it for every single test.
  @@school = Factory(:school)
  @@student = Factory(:student, :school => @@school)
  @@topic = Factory(:topic, :school => @@school)
  @@exam = Factory(:exam, :topic => @@topic)


  context "A StudentExam" do

    setup do
      @student_exam = Factory(:student_exam, :exam => @@exam, :student => @@student, :room_number => "WB 302")
    end

    should "take place at 'Some School'" do
      assert_equal @student_exam, 'Some School'
    end

    should "be in_progress? when created" do
      assert @student_exam.in_progress?
    end

    should "not be in_progress? when finish! is called" do
      @@student_exam.finish!
      assert !@student_exam.in_progress
    end

  end

end

: - , .

# A StudentExam represents an Exam taken by a Student.
# It records the start/stop time, room number, etc.
class StudentExamTest < ActiveSupport::TestCase

  ...

  private

    def school
      @@school ||= Factory(:school)
    end

    # use school instead of @@school
    def student
      @@school ||= Factory(:student, :school => school)
    end

end
+2

? , , , . , unit test , , .

, , , exam.location( ), . , . , - ( Test:: Unit Mocha, , ):

test "exam gets location from school name" do
  school = stub_everything
  school.expects(:name).returns(:a_school_name)
  exam = Factory(:exam, :school => school)

  assert_equal :a_school_name, exam.location
end

, , , . , unit test, -!

+2

http://m.onkey.org/2009/9/20/make-your-shoulda-tests-faster-with-fast_context - , toa/factory -girl, , fast_context, , , .

0

fast_context ( github), , .

, , - . FactoryGirl , .

Fixie, ActiveRecord , , . Fixie FactoryGirl, .

0

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