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_within_create_block_of_new_child
man = Man.first
interest = man.interests.build do |i|
assert i.man.equal?(man), "Man of child should be the same instance as a parent"
end
assert interest.man.equal?(man), "Man of the child should still be the same instance as a parent"
end
def test_parent_instance_should_be_shared_within_build_block_of_new_child
man = Man.first
interest = man.interests.build do |i|
assert i.man.equal?(man), "Man of child should be the same instance as a parent"
end
assert interest.man.equal?(man), "Man of the child should still be the same instance as a parent"
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_parent_instance_should_be_shared_with_first_and_last_child
man = Man.first
assert man.interests.first.man.equal? man
assert man.interests.last.man.equal? man
end
def test_parent_instance_should_be_shared_with_first_n_and_last_n_children
man = Man.first
interests = man.interests.first(2)
assert interests[0].man.equal? man
assert interests[1].man.equal? man
interests = man.interests.last(2)
assert interests[0].man.equal? man
assert interests[1].man.equal? man
end
def test_parent_instance_should_find_child_instance_using_child_instance_id
man = Man.create!
interest = Interest.create!
man.interests = [interest]
assert interest.equal?(man.interests.first), "The inverse association should use the interest already created and held in memory"
assert interest.equal?(man.interests.find(interest.id)), "The inverse association should use the interest already created and held in memory"
assert man.equal?(man.interests.first.man), "Two inversion should lead back to the same object that was originally held"
assert man.equal?(man.interests.find(interest.id).man), "Two inversions should lead back to the same object that was originally held"
end
def test_parent_instance_should_find_child_instance_using_child_instance_id_when_created
man = Man.create!
interest = Interest.create!(man: man)
assert man.equal?(man.interests.first.man), "Two inverses should lead back to the same object that was originally held"
assert man.equal?(man.interests.find(interest.id).man), "Two inversions should lead back to the same object that was originally held"
assert_equal man.name, man.interests.find(interest.id).man.name, "The name of the man should match before the name is changed"
man.name = "Ben Bitdiddle"
assert_equal man.name, man.interests.find(interest.id).man.name, "The name of the man should match after the parent name is changed"
man.interests.find(interest.id).man.name = "Alyssa P. Hacker"
assert_equal man.name, man.interests.find(interest.id).man.name, "The name of the man should match after the child name is changed"
end
def test_raise_record_not_found_error_when_invalid_ids_are_passed
man = Man.create!
invalid_id = 2394823094892348920348523452345
assert_raise(ActiveRecord::RecordNotFound) { man.interests.find(invalid_id) }
invalid_ids = [8432342, 2390102913, 2453245234523452]
assert_raise(ActiveRecord::RecordNotFound) { man.interests.find(invalid_ids) }
end
def test_raise_record_not_found_error_when_no_ids_are_passed
man = Man.create!
assert_raise(ActiveRecord::RecordNotFound) { man.interests.find() }
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
