spec: get acts_as_list tests running again

test plan:
check jenkins output
confirm it runs now

Change-Id: I25c9e677ae754e1cfcb9562aef6585ff6e40b0b7
Reviewed-on: https://gerrit.instructure.com/107796
Tested-by: Jenkins
Reviewed-by: Landon Wilkins <lwilkins@instructure.com>
Product-Review: Landon Wilkins <lwilkins@instructure.com>
QA-Review: Landon Wilkins <lwilkins@instructure.com>

gems/acts_as_list/lib/active_record/acts/list.rb

@@ -59,7 +59,7 @@ module ActiveRecord
                     when Hash
                       scope
                     else
-                      raise InvalidArgument.new("scope must be nil, a symbol, an array, or a hash")
+                      raise ArgumentError.new("scope must be nil, a symbol, an array, or a hash")
                     end
             # expand assocations to their foreign keys
             new_scope = {}
@@ -126,9 +126,7 @@ module ActiveRecord
           RUBY
 
           if position_column != 'position'
-            class_eval do
-              alias_method :position, self.class.position_column.to_sym
-            end
+            define_method(:position) { read_attribute(self.class.position_column.to_sym) }
           end
         end
       end

gems/acts_as_list/lib/acts_as_list.rb

@@ -1,2 +1,2 @@
-require 'active_record/acts/list'
-ActiveRecord::Base.class_eval { include ActiveRecord::Acts::List }
+require_relative "active_record/acts/list"
+ActiveRecord::Base.class_eval { include ActiveRecord::Acts::List }

gems/acts_as_list/test.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+set -e
+
+bundle check || bundle install
+ruby test/list_test.rb

gems/acts_as_list/test/list_test.rb

@@ -1,12 +1,11 @@
 require 'test/unit'
 
 require 'rubygems'
-gem 'activerecord', '>= 1.15.4.7794'
 require 'active_record'
 
-require "#{File.dirname(__FILE__)}/../init"
+require_relative "../lib/acts_as_list"
 
-ActiveRecord::Base.establish_connection(:adapter => "sqlite3", :dbfile => ":memory:")
+ActiveRecord::Base.establish_connection(:adapter => "sqlite3", :database => ":memory:")
 
 def setup_db
   ActiveRecord::Schema.define(:version => 1) do
@@ -26,12 +25,13 @@ def teardown_db
 end
 
 class Mixin < ActiveRecord::Base
+  def self.nulls(first_or_last, column, direction = nil)
+    "#{column} IS#{" NOT" unless first_or_last == :last} NULL, #{column} #{direction.to_s.upcase}".strip
+  end
 end
 
 class ListMixin < Mixin
-  acts_as_list :column => "pos", :scope => :parent
-
-  def self.table_name() "mixins" end
+  acts_as_list :column => "pos", :scope => :parent_id
 end
 
 class ListMixinSub1 < ListMixin
@@ -40,13 +40,10 @@ end
 class ListMixinSub2 < ListMixin
 end
 
-class ListWithStringScopeMixin < ActiveRecord::Base
-  acts_as_list :column => "pos", :scope => 'parent_id = #{parent_id}'
-
-  def self.table_name() "mixins" end
+class UnscopedListMixin < Mixin
+  acts_as_list :column => "pos"
 end
 
-
 class ListTest < Test::Unit::TestCase
 
   def setup
@@ -82,7 +79,7 @@ class ListTest < Test::Unit::TestCase
 
   def test_injection
     item = ListMixin.new(:parent_id => 1)
-    assert_equal "parent_id = 1", item.scope_condition
+    assert_equal({parent_id: 1}, item.scope_condition)
     assert_equal "pos", item.class.position_column
   end
 
@@ -155,24 +152,16 @@ class ListTest < Test::Unit::TestCase
     assert_equal 3, ListMixin.find(4).pos
 
     ListMixin.find(1).destroy
-
     assert_equal [3, 4], ListMixin.where('parent_id = 5').order('pos').pluck(:id)
 
     assert_equal 1, ListMixin.find(3).pos
     assert_equal 2, ListMixin.find(4).pos
   end
 
-  def test_with_string_based_scope
-    new = ListWithStringScopeMixin.create(:parent_id => 500)
-    assert_equal 1, new.pos
-    assert new.first?
-    assert new.last?
-  end
-
   def test_nil_scope
-    new1, new2, new3 = ListMixin.create, ListMixin.create, ListMixin.create
+    new1, new2, new3 = UnscopedListMixin.create, UnscopedListMixin.create, UnscopedListMixin.create
     new2.move_to_top
-    assert_equal [new2, new1, new3], ListMixin.where('parent_id IS NULL').order('pos').to_a
+    assert_equal [new2, new1, new3], UnscopedListMixin.where('parent_id IS NULL').order('pos').to_a
   end
 
 
@@ -245,7 +234,7 @@ class ListSubTest < Test::Unit::TestCase
 
   def test_injection
     item = ListMixin.new("parent_id"=>1)
-    assert_equal "parent_id = 1", item.scope_condition
+    assert_equal({parent_id: 1}, item.scope_condition)
     assert_equal "pos", item.class.position_column
   end