Unit test patterned after AWDR p. 186 doesn't work as expect

Rails
1

I have the following Ruby migration:

class CreateSimulations < ActiveRecord::Migration
def self.up
create_table :simulations do |t|
t.string :name, :desc, :time_units
t.column :run_length, :float

  t.timestamps
end

end

def self.down
drop_table :simulations
end
end

My class has the following validations:

class Simulation < ActiveRecord::Base

validates_uniqueness_of :name
validates_numericality_of :run_length
validates_inclusion_of :time_units,
:in => %w{sec min hr days},
:message => “should be ‘sec’, ‘min’, ‘hr’,
‘days’”
validates_presence_of :name, :time_units, :run_length

end

My unit test looks like this:

def test_unique_name
sim1 = Simulation.new( :name => “base”, :run_length => 84600,
:time_units =>“sec”)
assert sim1.save

sim2 = Simulation.new
sim2.name ="base"
sim2.run_length = 8
sim2.time_units = "hr"
assert !sim2.save, sim2.errors.on(:name)
assert_equal

ActiveRecord::Errors.default_error_messages[:taken],sim2.errors.on(:name)
end

It fails on the assert_equal line with the following info:

  1. Failure:
    test_unique_name(SimulationTest)
    [test/unit/simulation_test.rb:61:in test_unique_name' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/testi ng/setup_and_teardown.rb:33:insend’
    c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/testi
    ng/setup_and_teardown.rb:33:in `run’]:
    already taken.
    <“has already been taken”> expected but was
    <[“has already been taken”, “has already been taken”]>.

4 tests, 17 assertions, 1 failures, 0 errors

Why are there 2 copies of the “has already been taken” error message? A
similar test with a different object works just fine.

Thanks,
Louise

2

Why are there 2 copies of the “has already been taken” error message? A
similar test with a different object works just fine.

Random guess: somewhere in your app or in its tests you’ve got a
“require ‘simulation’” that is loading simulation.rb a second time.

Fred

3

Frederick C. wrote:

Why are there 2 copies of the “has already been taken” error message? �A
similar test with a different object works just fine.

Random guess: somewhere in your app or in its tests you’ve got a
“require ‘simulation’” that is loading simulation.rb a second time.

Fred

Good guess, that was exactly the problem.

Thanks!