dont understand unit test self.use_instantiated_fixtures

rubyonrails-talk
1

Hi all,

I am trying to do some tests based on a tutorial here http://www.aidanf.net/rails_user_authentication_tutorial

here is the two tests that seem to 'blow up' when I have the use_instantiated_fixtures line in place.

require File.dirname(__FILE__) + '/../test_helper'

class UserTest < Test::Unit::TestCase   self.use_instantiated_fixtures = true   fixtures :users

  # test basic authentication   def test_auth     # check that we can login a valid user      assert_equal @bob, User.authenticate("bob", "test1")     # wrong username     assert_nil User.authenticate("notbob", "test1")     # wrong pwd     assert_nil User.authenticate("bob", "wrongpass")     # both wrong     assert_nil User.authenticate("notbob", "wrongpass")   end

  # can we change passwords   def test_passwordchange     # check that it exists in the first place     assert_equal @longbob, User.authenticate("longbob", "longtest")     # change password     @longbob.password = @longbob.password_confirmation = "nonbobpasswd"     assert @longbob.save     # check that the new password works     assert_equal @longbob, User.authenticate("longbob", "nonbobpasswd")     # check that old password doesnt work any more     assert_nil User.authenticate("longbob", "longtest")     #change it back again     @longbob.password = @longbob.password_confirmation = "longtest"     assert @longbob.save     assert_equal @longbob, User.authenticate("longbob", "longtest")     assert_nil User.authenticate("longbob", "nonbobpasswd")   end

# 2 other tests that work below here omitted # ...... end

This is the error listing I get

ruby user_test.rb

Loaded suite user_test Started F..F Finished in 0.279297 seconds.

  1) Failure: test_auth(UserTest) [user_test.rb:10]: <#<User:0x99f7b18 @attributes=   {"salt"=>"813762200.1356",    "name"=>"bob",    "hashed_password"=>"69f50afebdc75388afbe144e3355b6c08066a0bc",    "lastname"=>"bob",    "firstname"=>"bob",    "id"=>"1000001",    "email"=>"bob@mcbob.com"}>> expected but was <nil>.

  2) Failure: test_passwordchange(UserTest) [user_test.rb:22]: <#<User:0x99affc0 @attributes=   {"salt"=>"808396800.134522",    "name"=>"longbob",    "hashed_password"=>"f1bd0a176e98e973b03529ee89303e24acca00c6",    "lastname"=>"bob",    "firstname"=>"long",    "id"=>"1000003",    "email"=>"lbob@mcbob.com"}>> expected but was <nil>.

4 tests, 11 assertions, 2 failures, 0 errors

Now if i comment out the line I get this instead

ruby user_test.rb

Loaded suite user_test Started ...E Finished in 0.149724 seconds.

  1) Error: test_passwordchange(UserTest): NoMethodError: You have a nil object when you didn't expect it! The error occurred while evaluating nil.password_confirmation=     user_test.rb:24:in `test_passwordchange'

4 tests, 14 assertions, 0 failures, 1 errors

Having tried other good and bad values in test_auth I reckon that the whole content of this method is not providing good testing ....

And test_passwordchange seems to be completely missing an instance variable.

What am I missing ?? I am using Rails version 1.2.3

mjt