rewrite inheritance tests with a custom inheritance_column

previously the tests with and without a custom `inheritance_column`
used the same models. Since the model then has both fields this can lead
to false positives.

activerecord/test/cases/inheritance_test.rb

@@ -123,9 +123,10 @@ class InheritanceTest < ActiveRecord::TestCase
   end
 
   def test_alt_inheritance_find
-    switch_to_alt_inheritance_column
-    test_inheritance_find
-    switch_to_default_inheritance_column
+    assert_kind_of Cucumber, Vegetable.find(1)
+    assert_kind_of Cucumber, Cucumber.find(1)
+    assert_kind_of Cabbage, Vegetable.find(2)
+    assert_kind_of Cabbage, Cabbage.find(2)
   end
 
   def test_alt_becomes_works_with_sti
@@ -142,9 +143,9 @@ class InheritanceTest < ActiveRecord::TestCase
   end
 
   def test_alt_inheritance_find_all
-    switch_to_alt_inheritance_column
-    test_inheritance_find_all
-    switch_to_default_inheritance_column
+    companies = Vegetable.all.merge!(:order => 'id').to_a
+    assert_kind_of Cucumber, companies[0]
+    assert_kind_of Cabbage, companies[1]
   end
 
   def test_inheritance_save
@@ -157,9 +158,11 @@ class InheritanceTest < ActiveRecord::TestCase
   end
 
   def test_alt_inheritance_save
-    switch_to_alt_inheritance_column
-    test_inheritance_save
-    switch_to_default_inheritance_column
+    cabbage = Cabbage.new(:name => 'Savoy')
+    cabbage.save!
+
+    savoy = Vegetable.find(cabbage.id)
+    assert_kind_of Cabbage, savoy
   end
 
   def test_inheritance_condition
@@ -169,9 +172,9 @@ class InheritanceTest < ActiveRecord::TestCase
   end
 
   def test_alt_inheritance_condition
-    switch_to_alt_inheritance_column
-    test_inheritance_condition
-    switch_to_default_inheritance_column
+    assert_equal 4, Vegetable.count
+    assert_equal 1, Cucumber.count
+    assert_equal 3, Cabbage.count
   end
 
   def test_finding_incorrect_type_data
@@ -180,9 +183,8 @@ class InheritanceTest < ActiveRecord::TestCase
   end
 
   def test_alt_finding_incorrect_type_data
-    switch_to_alt_inheritance_column
-    test_finding_incorrect_type_data
-    switch_to_default_inheritance_column
+    assert_raise(ActiveRecord::RecordNotFound) { Cucumber.find(2) }
+    assert_nothing_raised   { Cucumber.find(1) }
   end
 
   def test_update_all_within_inheritance
@@ -193,9 +195,9 @@ class InheritanceTest < ActiveRecord::TestCase
   end
 
   def test_alt_update_all_within_inheritance
-    switch_to_alt_inheritance_column
-    test_update_all_within_inheritance
-    switch_to_default_inheritance_column
+    Cabbage.update_all "name = 'the cabbage'"
+    assert_equal "the cabbage", Cabbage.first.name
+    assert_equal ["my cucumber"], Cucumber.all.map(&:name).uniq
   end
 
   def test_destroy_all_within_inheritance
@@ -205,9 +207,9 @@ class InheritanceTest < ActiveRecord::TestCase
   end
 
   def test_alt_destroy_all_within_inheritance
-    switch_to_alt_inheritance_column
-    test_destroy_all_within_inheritance
-    switch_to_default_inheritance_column
+    Cabbage.destroy_all
+    assert_equal 0, Cabbage.count
+    assert_equal 1, Cucumber.count
   end
 
   def test_find_first_within_inheritance
@@ -217,9 +219,9 @@ class InheritanceTest < ActiveRecord::TestCase
   end
 
   def test_alt_find_first_within_inheritance
-    switch_to_alt_inheritance_column
-    test_find_first_within_inheritance
-    switch_to_default_inheritance_column
+    assert_kind_of Cabbage, Vegetable.all.merge!(:where => "name = 'his cabbage'").first
+    assert_kind_of Cabbage, Cabbage.all.merge!(:where => "name = 'his cabbage'").first
+    assert_nil Cucumber.all.merge!(:where => "name = 'his cabbage'").first
   end
 
   def test_complex_inheritance
@@ -233,9 +235,13 @@ class InheritanceTest < ActiveRecord::TestCase
   end
 
   def test_alt_complex_inheritance
-    switch_to_alt_inheritance_column
-    test_complex_inheritance
-    switch_to_default_inheritance_column
+    king_cole = KingCole.create("name" => "uniform heads")
+    assert_equal king_cole, KingCole.where("name = 'uniform heads'").first
+    assert_equal king_cole, GreenCabbage.all.merge!(:where => "name = 'uniform heads'").first
+    assert_equal king_cole, Cabbage.all.merge!(:where => "name = 'uniform heads'").first
+    assert_equal king_cole, Vegetable.all.merge!(:where => "name = 'uniform heads'").first
+    assert_equal 1, Cabbage.all.merge!(:where => "name = 'his cabbage'").to_a.size
+    assert_equal king_cole, Cabbage.find(king_cole.id)
   end
 
   def test_eager_load_belongs_to_something_inherited
@@ -243,6 +249,11 @@ class InheritanceTest < ActiveRecord::TestCase
     assert account.association_cache.key?(:firm), "nil proves eager load failed"
   end
 
+  def test_alt_eager_loading
+    cabbage = RedCabbage.all.merge!(:includes => :seller).find(4)
+    assert cabbage.association_cache.key?(:seller), "nil proves eager load failed"
+  end
+
   def test_eager_load_belongs_to_primary_key_quoting
     con = Account.connection
     assert_sql(/#{con.quote_table_name('companies')}.#{con.quote_column_name('id')} IN \(1\)/) do
@@ -250,12 +261,6 @@ class InheritanceTest < ActiveRecord::TestCase
     end
   end
 
-  def test_alt_eager_loading
-    switch_to_alt_inheritance_column
-    test_eager_load_belongs_to_something_inherited
-    switch_to_default_inheritance_column
-  end
-
   def test_inherits_custom_primary_key
     assert_equal Subscriber.primary_key, SpecialSubscriber.primary_key
   end
@@ -264,21 +269,6 @@ class InheritanceTest < ActiveRecord::TestCase
     assert_kind_of SpecialSubscriber, SpecialSubscriber.find("webster132")
     assert_nothing_raised { s = SpecialSubscriber.new("name" => "And breaaaaathe!"); s.id = 'roger'; s.save }
   end
-
-  private
-    def switch_to_alt_inheritance_column
-      # we don't want misleading test results, so get rid of the values in the type column
-      Company.all.merge!(:order => 'id').to_a.each do |c|
-        c['type'] = nil
-        c.save
-      end
-      [ Company, Firm, Client].each { |klass| klass.reset_column_information }
-      Company.inheritance_column = 'ruby_type'
-    end
-    def switch_to_default_inheritance_column
-      [ Company, Firm, Client].each { |klass| klass.reset_column_information }
-      Company.inheritance_column = 'type'
-    end
 end
 
 

activerecord/test/fixtures/vegetables.yml

@@ -6,4 +6,15 @@ first_cucumber:
 first_cabbage:
   id: 2
   custom_type: Cabbage
-  name: 'my cabbage'
+  name: 'my cabbage'
+
+second_cabbage:
+  id: 3
+  custom_type: Cabbage
+  name: 'his cabbage'
+
+red_cabbage:
+  id: 4
+  custom_type: RedCabbage
+  name: 'red cabbage'
+  seller_id: 3

activerecord/test/models/vegetables.rb

@@ -12,3 +12,13 @@ end
 
 class Cabbage < Vegetable
 end
+
+class GreenCabbage < Cabbage
+end
+
+class KingCole < GreenCabbage
+end
+
+class RedCabbage < Cabbage
+  belongs_to :seller, :class_name => 'Company'
+end

activerecord/test/schema/schema.rb

@@ -186,6 +186,7 @@ ActiveRecord::Schema.define do
 
   create_table :vegetables, :force => true do |t|
     t.string :name
+    t.integer :seller_id
     t.string :custom_type
   end