require "cases/helper"
require 'models/man'
require 'models/face'
require 'models/interest'
require 'models/zine'
require 'models/club'
require 'models/sponsor'
class InverseAssociationTests < ActiveRecord::TestCase
def test_should_allow_for_inverse_of_options_in_associations
assert_nothing_raised(ArgumentError, 'ActiveRecord should allow the inverse_of options on has_many') do
Class.new(ActiveRecord::Base).has_many(:wheels, :inverse_of => :car)
end
assert_nothing_raised(ArgumentError, 'ActiveRecord should allow the inverse_of options on has_one') do
Class.new(ActiveRecord::Base).has_one(:engine, :inverse_of => :car)
end
assert_nothing_raised(ArgumentError, 'ActiveRecord should allow the inverse_of options on belongs_to') do
Class.new(ActiveRecord::Base).belongs_to(:car, :inverse_of => :driver)
end
end
def test_should_be_able_to_ask_a_reflection_if_it_has_an_inverse
has_one_with_inverse_ref = Man.reflect_on_association(:face)
assert_respond_to has_one_with_inverse_ref, :has_inverse?
assert has_one_with_inverse_ref.has_inverse?
has_many_with_inverse_ref = Man.reflect_on_association(:interests)
assert_respond_to has_many_with_inverse_ref, :has_inverse?
assert has_many_with_inverse_ref.has_inverse?
belongs_to_with_inverse_ref = Face.reflect_on_association(:man)
assert_respond_to belongs_to_with_inverse_ref, :has_inverse?
assert belongs_to_with_inverse_ref.has_inverse?
has_one_without_inverse_ref = Club.reflect_on_association(:sponsor)
assert_respond_to has_one_without_inverse_ref, :has_inverse?
assert !has_one_without_inverse_ref.has_inverse?
has_many_without_inverse_ref = Club.reflect_on_association(:memberships)
assert_respond_to has_many_without_inverse_ref, :has_inverse?
assert !has_many_without_inverse_ref.has_inverse?
belongs_to_without_inverse_ref = Sponsor.reflect_on_association(:sponsor_club)
assert_respond_to belongs_to_without_inverse_ref, :has_inverse?
assert !belongs_to_without_inverse_ref.has_inverse?
end
def test_should_be_able_to_ask_a_reflection_what_it_is_the_inverse_of
has_one_ref = Man.reflect_on_association(:face)
assert_respond_to has_one_ref, :inverse_of
has_many_ref = Man.reflect_on_association(:interests)
assert_respond_to has_many_ref, :inverse_of
belongs_to_ref = Face.reflect_on_association(:man)
assert_respond_to belongs_to_ref, :inverse_of
end
def test_inverse_of_method_should_supply_the_actual_reflection_instance_it_is_the_inverse_of
has_one_ref = Man.reflect_on_association(:face)
assert_equal Face.reflect_on_association(:man), has_one_ref.inverse_of
has_many_ref = Man.reflect_on_association(:interests)
assert_equal Interest.reflect_on_association(:man), has_many_ref.inverse_of
belongs_to_ref = Face.reflect_on_association(:man)
assert_equal Man.reflect_on_association(:face), belongs_to_ref.inverse_of
end
def test_associations_with_no_inverse_of_should_return_nil
has_one_ref = Club.reflect_on_association(:sponsor)
assert_nil has_one_ref.inverse_of
has_many_ref = Club.reflect_on_association(:memberships)
assert_nil has_many_ref.inverse_of
belongs_to_ref = Sponsor.reflect_on_association(:sponsor_club)
assert_nil belongs_to_ref.inverse_of
end
end
class InverseHasOneTests < ActiveRecord::TestCase
fixtures :men, :faces
def test_parent_instance_should_be_shared_with_child_on_find
m = men(:gordon)
f = m.face
assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance"
f.man.name = 'Mungo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to child-owned instance"
end
def test_parent_instance_should_be_shared_with_eager_loaded_child_on_find
m = Man.all.merge!(:where => {:name => 'Gordon'}, :includes => :face).first
f = m.face
assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance"
f.man.name = 'Mungo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to child-owned instance"
m = Man.all.merge!(:where => {:name => 'Gordon'}, :includes => :face, :order => 'faces.id').first
f = m.face
assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance"
f.man.name = 'Mungo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to child-owned instance"
end
def test_parent_instance_should_be_shared_with_newly_built_child
m = Man.first
f = m.build_face(:description => 'haunted')
assert_not_nil f.man
assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance"
f.man.name = 'Mungo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to just-built-child-owned instance"
end
def test_parent_instance_should_be_shared_with_newly_created_child
m = Man.first
f = m.create_face(:description => 'haunted')
assert_not_nil f.man
assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance"
f.man.name = 'Mungo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to newly-created-child-owned instance"
end
def test_parent_instance_should_be_shared_with_newly_created_child_via_bang_method
m = Man.first
f = m.create_face!(:description => 'haunted')
assert_not_nil f.man
assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance"
f.man.name = 'Mungo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to newly-created-child-owned instance"
end
def test_parent_instance_should_be_shared_with_replaced_via_accessor_child
m = Man.first
f = Face.new(:description => 'haunted')
m.face = f
assert_not_nil f.man
assert_equal m.name, f.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to parent instance"
f.man.name = 'Mungo'
assert_equal m.name, f.man.name, "Name of man should be the same after changes to replaced-child-owned instance"
end
def test_trying_to_use_inverses_that_dont_exist_should_raise_an_error
assert_raise(ActiveRecord::InverseOfAssociationNotFoundError) { Man.first.dirty_face }
end
end
class InverseHasManyTests < ActiveRecord::TestCase
fixtures :men, :interests
def test_parent_instance_should_be_shared_with_every_child_on_find
m = men(:gordon)
is = m.interests
is.each do |i|
assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance"
i.man.name = 'Mungo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to child-owned instance"
end
end
def test_parent_instance_should_be_shared_with_eager_loaded_children
m = Man.all.merge!(:where => {:name => 'Gordon'}, :includes => :interests).first
is = m.interests
is.each do |i|
assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance"
i.man.name = 'Mungo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to child-owned instance"
end
m = Man.all.merge!(:where => {:name => 'Gordon'}, :includes => :interests, :order => 'interests.id').first
is = m.interests
is.each do |i|
assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance"
i.man.name = 'Mungo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to child-owned instance"
end
end
def test_parent_instance_should_be_shared_with_newly_block_style_built_child
m = Man.first
i = m.interests.build {|ii| ii.topic = 'Industrial Revolution Re-enactment'}
assert_not_nil i.topic, "Child attributes supplied to build via blocks should be populated"
assert_not_nil i.man
assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance"
i.man.name = 'Mungo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to just-built-child-owned instance"
end
def test_parent_instance_should_be_shared_with_newly_created_via_bang_method_child
m = Man.first
i = m.interests.create!(:topic => 'Industrial Revolution Re-enactment')
assert_not_nil i.man
assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance"
i.man.name = 'Mungo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to newly-created-child-owned instance"
end
def test_parent_instance_should_be_shared_with_newly_block_style_created_child
m = Man.first
i = m.interests.create {|ii| ii.topic = 'Industrial Revolution Re-enactment'}
assert_not_nil i.topic, "Child attributes supplied to create via blocks should be populated"
assert_not_nil i.man
assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance"
i.man.name = 'Mungo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to newly-created-child-owned instance"
end
def test_parent_instance_should_be_shared_with_poked_in_child
m = men(:gordon)
i = Interest.create(:topic => 'Industrial Revolution Re-enactment')
m.interests << i
assert_not_nil i.man
assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance"
i.man.name = 'Mungo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to newly-created-child-owned instance"
end
def test_parent_instance_should_be_shared_with_replaced_via_accessor_children
m = Man.first
i = Interest.new(:topic => 'Industrial Revolution Re-enactment')
m.interests = [i]
assert_not_nil i.man
assert_equal m.name, i.man.name, "Name of man should be the same before changes to parent instance"
m.name = 'Bongo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to parent instance"
i.man.name = 'Mungo'
assert_equal m.name, i.man.name, "Name of man should be the same after changes to replaced-child-owned instance"
end
def test_trying_to_use_inverses_that_dont_exist_should_raise_an_error
assert_raise(ActiveRecord::InverseOfAssociationNotFoundError) { Man.first.secret_interests }
end
end
class InverseBelongsToTests < ActiveRecord::TestCase
fixtures :men, :faces, :interests
def test_child_instance_should_be_shared_with_parent_on_find
f = faces(:trusting)
m = f.man
assert_equal f.description, m.face.description, "Description of face should be the same before changes to child instance"
f.description = 'gormless'
assert_equal f.description, m.face.description, "Description of face should be the same after changes to child instance"
m.face.description = 'pleasing'
assert_equal f.description, m.face.description, "Description of face should be the same after changes to parent-owned instance"
end
def test_eager_loaded_child_instance_should_be_shared_with_parent_on_find
f = Face.all.merge!(:includes => :man, :where => {:description => 'trusting'}).first
m = f.man
assert_equal f.description, m.face.description, "Description of face should be the same before changes to child instance"
f.description = 'gormless'
assert_equal f.description, m.face.description, "Description of face should be the same after changes to child instance"
m.face.description = 'pleasing'
assert_equal f.description, m.face.description, "Description of face should be the same after changes to parent-owned instance"
f = Face.all.merge!(:includes => :man, :order => 'men.id', :where => {:description => 'trusting'}).first
m = f.man
assert_equal f.description, m.face.description, "Description of face should be the same before changes to child instance"
f.description = 'gormless'
assert_equal f.description, m.face.description, "Description of face should be the same after changes to child instance"
m.face.description = 'pleasing'
assert_equal f.description, m.face.description, "Description of face should be the same after changes to parent-owned instance"
end
def test_child_instance_should_be_shared_with_newly_built_parent
f = faces(:trusting)
m = f.build_man(:name => 'Charles')
assert_not_nil m.face
assert_equal f.description, m.face.description, "Description of face should be the same before changes to child instance"
f.description = 'gormless'
assert_equal f.description, m.face.description, "Description of face should be the same after changes to child instance"
m.face.description = 'pleasing'
assert_equal f.description, m.face.description, "Description of face should be the same after changes to just-built-parent-owned instance"
end
def test_child_instance_should_be_shared_with_newly_created_parent
f = faces(:trusting)
m = f.create_man(:name => 'Charles')
assert_not_nil m.face
assert_equal f.description, m.face.description, "Description of face should be the same before changes to child instance"
f.description = 'gormless'
assert_equal f.description, m.face.description, "Description of face should be the same after changes to child instance"
m.face.description = 'pleasing'
assert_equal f.description, m.face.description, "Description of face should be the same after changes to newly-created-parent-owned instance"
end
def test_should_not_try_to_set_inverse_instances_when_the_inverse_is_a_has_many
i = interests(:trainspotting)
m = i.man
assert_not_nil m.interests
iz = m.interests.detect { |_iz| _iz.id == i.id}
assert_not_nil iz
assert_equal i.topic, iz.topic, "Interest topics should be the same before changes to child"
i.topic = 'Eating cheese with a spoon'
assert_not_equal i.topic, iz.topic, "Interest topics should not be the same after changes to child"
iz.topic = 'Cow tipping'
assert_not_equal i.topic, iz.topic, "Interest topics should not be the same after changes to parent-owned instance"
end
def test_child_instance_should_be_shared_with_replaced_via_accessor_parent
f = Face.first
m = Man.new(:name => 'Charles')
f.man = m
assert_not_nil m.face
assert_equal f.description, m.face.description, "Description of face should be the same before changes to child instance"
f.description = 'gormless'
assert_equal f.description, m.face.description, "Description of face should be the same after changes to child instance"
m.face.description = 'pleasing'
assert_equal f.description, m.face.description, "Description of face should be the same after changes to replaced-parent-owned instance"
end
def test_trying_to_use_inverses_that_dont_exist_should_raise_an_error
assert_raise(ActiveRecord::InverseOfAssociationNotFoundError) { Face.first.horrible_man }
end
end
class InversePolymorphicBelongsToTests < ActiveRecord::TestCase
fixtures :men, :faces, :interests
def test_child_instance_should_be_shared_with_parent_on_find
f = Face.all.merge!(:where => {:description => 'confused'}).first
m = f.polymorphic_man
assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same before changes to child instance"
f.description = 'gormless'
assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same after changes to child instance"
m.polymorphic_face.description = 'pleasing'
assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same after changes to parent-owned instance"
end
def test_eager_loaded_child_instance_should_be_shared_with_parent_on_find
f = Face.all.merge!(:where => {:description => 'confused'}, :includes => :man).first
m = f.polymorphic_man
assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same before changes to child instance"
f.description = 'gormless'
assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same after changes to child instance"
m.polymorphic_face.description = 'pleasing'
assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same after changes to parent-owned instance"
f = Face.all.merge!(:where => {:description => 'confused'}, :includes => :man, :order => 'men.id').first
m = f.polymorphic_man
assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same before changes to child instance"
f.description = 'gormless'
assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same after changes to child instance"
m.polymorphic_face.description = 'pleasing'
assert_equal f.description, m.polymorphic_face.description, "Description of face should be the same after changes to parent-owned instance"
end
def test_child_instance_should_be_shared_with_replaced_via_accessor_parent
face = faces(:confused)
new_man = Man.new
assert_not_nil face.polymorphic_man
face.polymorphic_man = new_man
assert_equal face.description, new_man.polymorphic_face.description, "Description of face should be the same before changes to parent instance"
face.description = 'Bongo'
assert_equal face.description, new_man.polymorphic_face.description, "Description of face should be the same after changes to parent instance"
new_man.polymorphic_face.description = 'Mungo'
assert_equal face.description, new_man.polymorphic_face.description, "Description of face should be the same after changes to replaced-parent-owned instance"
end
def test_child_instance_should_be_shared_with_replaced_via_method_parent
face = faces(:confused)
new_man = Man.new
assert_not_nil face.polymorphic_man
face.polymorphic_man = new_man
assert_equal face.description, new_man.polymorphic_face.description, "Description of face should be the same before changes to parent instance"
face.description = 'Bongo'
assert_equal face.description, new_man.polymorphic_face.description, "Description of face should be the same after changes to parent instance"
new_man.polymorphic_face.description = 'Mungo'
assert_equal face.description, new_man.polymorphic_face.description, "Description of face should be the same after changes to replaced-parent-owned instance"
end
def test_should_not_try_to_set_inverse_instances_when_the_inverse_is_a_has_many
i = interests(:llama_wrangling)
m = i.polymorphic_man
assert_not_nil m.polymorphic_interests
iz = m.polymorphic_interests.detect { |_iz| _iz.id == i.id}
assert_not_nil iz
assert_equal i.topic, iz.topic, "Interest topics should be the same before changes to child"
i.topic = 'Eating cheese with a spoon'
assert_not_equal i.topic, iz.topic, "Interest topics should not be the same after changes to child"
iz.topic = 'Cow tipping'
assert_not_equal i.topic, iz.topic, "Interest topics should not be the same after changes to parent-owned instance"
end
def test_trying_to_access_inverses_that_dont_exist_shouldnt_raise_an_error
# Ideally this would, if only for symmetry's sake with other association types
assert_nothing_raised(ActiveRecord::InverseOfAssociationNotFoundError) { Face.first.horrible_polymorphic_man }
end
def test_trying_to_set_polymorphic_inverses_that_dont_exist_at_all_should_raise_an_error
# fails because no class has the correct inverse_of for horrible_polymorphic_man
assert_raise(ActiveRecord::InverseOfAssociationNotFoundError) { Face.first.horrible_polymorphic_man = Man.first }
end
def test_trying_to_set_polymorphic_inverses_that_dont_exist_on_the_instance_being_set_should_raise_an_error
# passes because Man does have the correct inverse_of
assert_nothing_raised(ActiveRecord::InverseOfAssociationNotFoundError) { Face.first.polymorphic_man = Man.first }
# fails because Interest does have the correct inverse_of
assert_raise(ActiveRecord::InverseOfAssociationNotFoundError) { Face.first.polymorphic_man = Interest.first }
end
end
# NOTE - these tests might not be meaningful, ripped as they were from the parental_control plugin
# which would guess the inverse rather than look for an explicit configuration option.
class InverseMultipleHasManyInversesForSameModel < ActiveRecord::TestCase
fixtures :men, :interests, :zines
def test_that_we_can_load_associations_that_have_the_same_reciprocal_name_from_different_models
assert_nothing_raised(ActiveRecord::AssociationTypeMismatch) do
i = Interest.first
i.zine
i.man
end
end
def test_that_we_can_create_associations_that_have_the_same_reciprocal_name_from_different_models
assert_nothing_raised(ActiveRecord::AssociationTypeMismatch) do
i = Interest.first
i.build_zine(:title => 'Get Some in Winter! 2008')
i.build_man(:name => 'Gordon')
i.save!
end
end
end
