discourse/spec/components/concern/positionable_spec.rb

54 lines
1.4 KiB
Ruby

# frozen_string_literal: true
require "rails_helper"
describe Positionable do
def positions
TestItem.order('position asc, id asc').pluck(:id)
end
context "move_to" do
before do
class TestItem < ActiveRecord::Base
include Positionable
end
DB.exec("create temporary table test_items(id int primary key, position int)")
end
after do
DB.exec("drop table test_items")
# this weakref in the descendant tracker should clean up the two tests
# if this becomes an issue we can revisit (watch out for erratic tests)
Object.send(:remove_const, :TestItem)
end
it "can position stuff correctly" do
5.times do |i|
DB.exec("insert into test_items(id,position) values(#{i}, #{i})")
end
expect(positions).to eq([0, 1, 2, 3, 4])
TestItem.find(3).move_to(0)
expect(positions).to eq([3, 0, 1, 2, 4])
expect(TestItem.pluck(:position).sort).to eq([0, 1, 2, 3, 4])
TestItem.find(3).move_to(1)
expect(positions).to eq([0, 3, 1, 2, 4])
# this is somewhat odd, but when there is no such position, not much we can do
TestItem.find(1).move_to(5)
expect(positions).to eq([0, 3, 2, 4, 1])
expect(TestItem.pluck(:position).sort).to eq([0, 1, 2, 3, 4])
item = TestItem.new
item.id = 7
item.save
expect(item.position).to eq(5)
end
end
end