require "spec_helper"
if DbHelpers.pg?
  RSpec.describe "Sequel::Plugins::Bitemporal", "with ranges" do
    before :all do
      db_setup ranges: true
    end
    before do
      Timecop.freeze 2009, 11, 28
    end
    after do
      Timecop.return
    end
    it "checks version class is given" do
      expect{
        @version_class.plugin :bitemporal
      }.to raise_error Sequel::Error, "please specify version class to use for bitemporal plugin"
    end
    it "checks required columns are present" do
      expect{
        @version_class.plugin :bitemporal, version_class: @master_class
      }.to raise_error Sequel::Error, "bitemporal plugin requires the following missing columns on version class: master_id, valid_from, valid_to, created_at, expired_at"
    end
    it "propagates errors from version to master" do
      master = @master_class.new
      expect(master).to be_valid
      master.attributes = {name: "Single Standard"}
      expect(master).not_to be_valid
      expect(master.errors).to eq({price: ["is required"]})
    end
    it "#update_attributes returns false instead of raising errors" do
      master = @master_class.new
      expect(master.update_attributes(name: "Single Standard")).to be_falsey
      expect(master).to be_new
      expect(master.errors).to eq({price: ["is required"]})
      expect(master.update_attributes(price: 98)).to be_truthy
    end
    it "allows creating a master and its first version in one step" do
      master = @master_class.new
      result = master.update_attributes name: "Single Standard", price: 98
      expect(result).to be_truthy
      expect(result).to eq(master)
      expect(master).not_to be_new
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to | current |
        | Single Standard | 98    | 2009-11-28 |            | 2009-11-28 | MAX DATE | true    |
      }
    end
    it "allows creating a new version in the past" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98, valid_from: Date.today-1
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to | current |
        | Single Standard | 98    | 2009-11-28 |            | 2009-11-27 | MAX DATE | true    |
      }
    end
    it "allows creating a new version in the future" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98, valid_from: Date.today+1
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to | current |
        | Single Standard | 98    | 2009-11-28 |            | 2009-11-29 | MAX DATE |         |
      }
    end
    it "doesn't loose previous version in same-day update" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      master.update_attributes name: "Single Standard", price: 94
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-28 | 2009-11-28 | MAX DATE |         |
        | Single Standard | 94    | 2009-11-28 |            | 2009-11-28 | MAX DATE | true    |
      }
    end
    it "allows partial updating based on current version" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      master.update_attributes price: 94
      master.update_attributes name: "King Size"
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-28 | 2009-11-28 | MAX DATE |         |
        | Single Standard | 94    | 2009-11-28 | 2009-11-28 | 2009-11-28 | MAX DATE |         |
        | King Size       | 94    | 2009-11-28 |            | 2009-11-28 | MAX DATE | true    |
      }
    end
    it "expires previous version but keep it in history" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      Timecop.freeze Date.today+1
      master.update_attributes price: 94
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | MAX DATE   |         |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-28 | 2009-11-29 |         |
        | Single Standard | 94    | 2009-11-29 |            | 2009-11-29 | MAX DATE   | true    |
      }
    end
    it "doesn't expire no longer valid versions" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98, valid_to: Date.today+1
      Timecop.freeze Date.today+1
      expect(master.update_attributes(price: 94)).to be_falsey
      master.update_attributes name: "Single Standard", price: 94
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 |            | 2009-11-28 | 2009-11-29 |         |
        | Single Standard | 94    | 2009-11-29 |            | 2009-11-29 | MAX DATE   | true    |
      }
    end
    it "allows shortening validity (SEE COMMENTS FOR IMPROVEMENTS)" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      Timecop.freeze Date.today+1
      master.update_attributes valid_to: Date.today+10
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | MAX DATE   |         |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-28 | 2009-11-29 |         |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-29 | 2009-12-09 | true    |
      }
      # would be even better if it could be:
      # | name            | price | created_at | expired_at | valid_from | valid_to   | current |
      # | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | 2009-11-30 |         |
      # | Single Standard | 98    | 2009-11-29 |            | 2009-11-28 | 2009-12-09 | true    |
    end
    it "allows extending validity (SEE COMMENTS FOR IMPROVEMENTS)" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98, valid_to: Date.today+2
      Timecop.freeze Date.today+1
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 |            | 2009-11-28 | 2009-11-30 | true    |
      }
      master.update_attributes valid_to: nil
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | 2009-11-30 |         |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-28 | 2009-11-29 |         |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-29 | MAX DATE   | true    |
      }
      # would be even better if it could be:
      # | name            | price | created_at | expired_at | valid_from | valid_to   | current |
      # | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | 2009-11-30 |         |
      # | Single Standard | 98    | 2009-11-29 |            | 2009-11-28 | MAX DATE   | true    |
    end
    it "don't create any new version without change" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      master.update_attributes price: 98
      master.update_attributes name: "Single Standard", price: 98
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to | current |
        | Single Standard | 98    | 2009-11-28 |            | 2009-11-28 | MAX DATE | true    |
      }
    end
    it "change in validity still creates a new version (SEE COMMENTS FOR IMPROVEMENTS)" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      Timecop.freeze Date.today+1
      master.update_attributes price: 98, valid_from: Date.today-2
      master.update_attributes price: 98, valid_from: Date.today+1
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 |            | 2009-11-28 | MAX DATE   | true    |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-27 | 2009-11-28 |         |
      }
      # would be even better if it could be:
      # | name            | price | created_at | expired_at | valid_from | valid_to   | current |
      # | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | MAX DATE   |         |
      # | Single Standard | 98    | 2009-11-29 |            | 2009-11-27 | MAX DATE   | true    |
    end
    it "overrides no future versions" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98, valid_to: Date.today+2
      master.update_attributes name: "Single Standard", price: 94, valid_from: Date.today+2, valid_to: Date.today+4
      master.update_attributes name: "Single Standard", price: 95, valid_from: Date.today+4, valid_to: Date.today+6
      Timecop.freeze Date.today+1
      master.update_attributes name: "King Size", valid_to: nil
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | 2009-11-30 |         |
        | Single Standard | 94    | 2009-11-28 |            | 2009-11-30 | 2009-12-02 |         |
        | Single Standard | 95    | 2009-11-28 |            | 2009-12-02 | 2009-12-04 |         |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-28 | 2009-11-29 |         |
        | King Size       | 98    | 2009-11-29 |            | 2009-11-29 | 2009-11-30 | true    |
      }
    end
    it "overrides multiple future versions" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98, valid_to: Date.today+2
      master.update_attributes name: "Single Standard", price: 94, valid_from: Date.today+2, valid_to: Date.today+4
      master.update_attributes name: "Single Standard", price: 95, valid_from: Date.today+4, valid_to: Date.today+6
      Timecop.freeze Date.today+1
      master.update_attributes name: "King Size", valid_to: Date.today+4
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | 2009-11-30 |         |
        | Single Standard | 94    | 2009-11-28 | 2009-11-29 | 2009-11-30 | 2009-12-02 |         |
        | Single Standard | 95    | 2009-11-28 | 2009-11-29 | 2009-12-02 | 2009-12-04 |         |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-28 | 2009-11-29 |         |
        | Single Standard | 95    | 2009-11-29 |            | 2009-12-03 | 2009-12-04 |         |
        | King Size       | 98    | 2009-11-29 |            | 2009-11-29 | 2009-12-03 | true    |
      }
    end
    it "overrides all future versions" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98, valid_to: Date.today+2
      master.update_attributes name: "Single Standard", price: 94, valid_from: Date.today+2, valid_to: Date.today+4
      master.update_attributes name: "Single Standard", price: 95, valid_from: Date.today+4, valid_to: Date.today+6
      Timecop.freeze Date.today+1
      master.update_attributes name: "King Size", valid_to: Time.utc(9999)
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | 2009-11-30 |         |
        | Single Standard | 94    | 2009-11-28 | 2009-11-29 | 2009-11-30 | 2009-12-02 |         |
        | Single Standard | 95    | 2009-11-28 | 2009-11-29 | 2009-12-02 | 2009-12-04 |         |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-28 | 2009-11-29 |         |
        | King Size       | 98    | 2009-11-29 |            | 2009-11-29 | MAX DATE   | true    |
      }
    end
    it "allows deleting current version" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 92, valid_from: Date.today-2, valid_to: Date.today
      master.update_attributes name: "Single Standard", price: 98
      master.update_attributes name: "Single Standard", price: 94, valid_from: Date.today+2
      Timecop.freeze Date.today+1
      expect(master.current_version.destroy).to be_truthy
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 92    | 2009-11-28 |            | 2009-11-26 | 2009-11-28 |         |
        | Single Standard | 98    | 2009-11-28 | 2009-11-28 | 2009-11-28 | MAX DATE   |         |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | 2009-11-30 |         |
        | Single Standard | 94    | 2009-11-28 |            | 2009-11-30 | MAX DATE   |         |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-28 | 2009-11-29 |         |
      }
    end
    it "allows deleting current version to restore the previous one" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 92, valid_from: Date.today-2, valid_to: Date.today
      master.update_attributes name: "Single Standard", price: 98
      master.update_attributes name: "Single Standard", price: 94, valid_from: Date.today+2
      Timecop.freeze Date.today+1
      expect(master.current_version.destroy(expand_previous_version: true)).to be_truthy
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 92    | 2009-11-28 |            | 2009-11-26 | 2009-11-28 |         |
        | Single Standard | 98    | 2009-11-28 | 2009-11-28 | 2009-11-28 | MAX DATE   |         |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | 2009-11-30 |         |
        | Single Standard | 94    | 2009-11-28 |            | 2009-11-30 | MAX DATE   |         |
        | Single Standard | 92    | 2009-11-29 |            | 2009-11-29 | 2009-11-30 | true    |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-28 | 2009-11-29 |         |
      }
    end
    it "allows deleting a future version" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      master.update_attributes name: "Single Standard", price: 94, valid_from: Date.today+2
      Timecop.freeze Date.today+1
      expect(master.versions.last.destroy).to be_truthy
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-28 | 2009-11-28 | MAX DATE   |         |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | 2009-11-30 |         |
        | Single Standard | 94    | 2009-11-28 | 2009-11-29 | 2009-11-30 | MAX DATE   |         |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-28 | MAX DATE   | true    |
      }
    end
    it "allows deleting a future version without expanding the current one" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      master.update_attributes name: "Single Standard", price: 94, valid_from: Date.today+2
      Timecop.freeze Date.today+1
      expect(master.versions.last.destroy(expand_previous_version: false)).to be_truthy
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-28 | 2009-11-28 | MAX DATE   |         |
        | Single Standard | 98    | 2009-11-28 |            | 2009-11-28 | 2009-11-30 | true    |
        | Single Standard | 94    | 2009-11-28 | 2009-11-29 | 2009-11-30 | MAX DATE   |         |
      }
    end
    it "allows deleting all versions" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      master.update_attributes name: "Single Standard", price: 94, valid_from: Date.today+2
      Timecop.freeze Date.today+1
      expect(master.destroy).to be_truthy
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-28 | 2009-11-28 | MAX DATE   |         |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | 2009-11-30 |         |
        | Single Standard | 94    | 2009-11-28 | 2009-11-29 | 2009-11-30 | MAX DATE   |         |
      }
    end
    it "allows simultaneous updates without information loss" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      Timecop.freeze Date.today+1
      master2 = @master_class.find id: master.id
      master.update_attributes name: "Single Standard", price: 94
      master2.update_attributes name: "Single Standard", price: 95
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | MAX DATE   |         |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-28 | 2009-11-29 |         |
        | Single Standard | 94    | 2009-11-29 | 2009-11-29 | 2009-11-29 | MAX DATE   |         |
        | Single Standard | 95    | 2009-11-29 |            | 2009-11-29 | MAX DATE   | true    |
      }
    end
    it "allows simultaneous cumulative updates" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      Timecop.freeze Date.today+1
      master2 = @master_class.find id: master.id
      master.update_attributes price: 94
      master2.update_attributes name: "King Size"
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | MAX DATE   |         |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-28 | 2009-11-29 |         |
        | Single Standard | 94    | 2009-11-29 | 2009-11-29 | 2009-11-29 | MAX DATE   |         |
        | King Size       | 94    | 2009-11-29 |            | 2009-11-29 | MAX DATE   | true    |
      }
    end
    it "can expire invalid versions" do
      master = @master_class.new.update_attributes name: "Single Standard", price: 98
      master.current_version.price = nil
      expect(master.current_version).not_to be_valid
      master.current_version.save validate: false
      Timecop.freeze Date.today+1
      master.update_attributes price: 94
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard |       | 2009-11-28 | 2009-11-29 | 2009-11-28 | MAX DATE   |         |
        | Single Standard |       | 2009-11-29 |            | 2009-11-28 | 2009-11-29 |         |
        | Single Standard | 94    | 2009-11-29 |            | 2009-11-29 | MAX DATE   | true    |
      }
    end
    it "can propagate changes to future versions per column" do
      propagate_per_column = @master_class.propagate_per_column
      begin
        @master_class.instance_variable_set :@propagate_per_column, true
        master = @master_class.new
        master.update_attributes name: "Single Standard", price: 12, length: nil, width: 1
        initial_today = Date.today
        Timecop.freeze initial_today+1 do
          master.update_attributes valid_from: initial_today+4, name: "King Size", price: 15, length: 2, width: 2
          expect(master.propagated_during_last_save.size).to eq(0)
        end
        Timecop.freeze initial_today+2 do
          master.update_attributes valid_from: initial_today+3, length: 1, width: 1
          expect(master.propagated_during_last_save.size).to eq(0)
        end
        Timecop.freeze initial_today+3 do
          master.update_attributes valid_from: initial_today+2, length: 3, width: 4
          expect(master.propagated_during_last_save.size).to eq(1)
        end
        expect(master).to have_versions %Q{
          | name            | price | length | width | created_at | expired_at | valid_from | valid_to   | current |
          | Single Standard | 12    |        | 1     | 2009-11-28 | 2009-11-29 | 2009-11-28 | MAX DATE   | true    |
          | Single Standard | 12    |        | 1     | 2009-11-29 | 2009-11-30 | 2009-11-28 | 2009-12-02 |         |
          | King Size       | 15    | 2      | 2     | 2009-11-29 |            | 2009-12-02 | MAX DATE   |         |
          | Single Standard | 12    |        | 1     | 2009-11-30 | 2009-12-01 | 2009-11-28 | 2009-12-01 |         |
          | Single Standard | 12    | 1      | 1     | 2009-11-30 | 2009-12-01 | 2009-12-01 | 2009-12-02 |         |
          | Single Standard | 12    |        | 1     | 2009-12-01 |            | 2009-11-28 | 2009-11-30 |         |
          | Single Standard | 12    | 3      | 4     | 2009-12-01 |            | 2009-11-30 | 2009-12-01 |         |
          | Single Standard | 12    | 3      | 4     | 2009-12-01 |            | 2009-12-01 | 2009-12-02 |         |
        }
      ensure
        @master_class.instance_variable_set :@propagate_per_column, propagate_per_column
      end
    end
    it "allows eager loading with conditions on current version" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      master.update_attributes name: "Single Standard", price: 94, valid_from: Date.today+2
      expect(@master_class.eager_graph(:current_version).where(Sequel.lit("rooms_current_version.id IS NOT NULL")).first).to be
      Timecop.freeze Date.today+1
      master.destroy
      expect(@master_class.eager_graph(:current_version).where(Sequel.lit("rooms_current_version.id IS NOT NULL")).first).to be_nil
    end
    it "allows loading masters with a current version" do
      master_destroyed = @master_class.new
      master_destroyed.update_attributes name: "Single Standard", price: 98
      master_destroyed.destroy
      master_with_current = @master_class.new
      master_with_current.update_attributes name: "Single Standard", price: 94
      master_with_future = @master_class.new
      master_with_future.update_attributes name: "Single Standard", price: 94, valid_from: Date.today+2
      expect(@master_class.with_current_version.all.size).to eq(1)
    end
    it "gets pending or current version attributes" do
      master = @master_class.new
      expect(master.attributes).to eq({})
      expect(master.pending_version).to be_nil
      expect(master.current_version).to be_nil
      expect(master.name).to be_nil

      expect(master.pending_or_current_version.name).to be_nil
      master.update_attributes name: "Single Standard", price: 98
      expect(master.attributes[:name]).to eq("Single Standard")
      expect(master.pending_version).to be_nil
      expect(master.pending_or_current_version.name).to eq("Single Standard")
      expect(master.name).to eq("Single Standard")

      master.attributes = {name: "King Size"}
      expect(master.attributes[:name]).to eq("King Size")
      expect(master.pending_version).to be
      expect(master.pending_or_current_version.name).to eq("King Size")
      expect(master.name).to eq("King Size")
    end
    it "allows to go back in time" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98, valid_to: Date.today+1
      master.update_attributes name: "Single Standard", price: 95, valid_from: Date.today+1, valid_to: Date.today+2
      master.update_attributes name: "Single Standard", price: 93, valid_from: Date.today+2, valid_to: Date.today+3
      master.update_attributes name: "Single Standard", price: 91, valid_from: Date.today+3
      Timecop.freeze Date.today+1
      master.update_attributes price: 94
      master.update_attributes price: 96, valid_from: Date.today+2
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 |            | 2009-11-28 | 2009-11-29 |         |
        | Single Standard | 95    | 2009-11-28 | 2009-11-29 | 2009-11-29 | 2009-11-30 |         |
        | Single Standard | 93    | 2009-11-28 |            | 2009-11-30 | 2009-12-01 |         |
        | Single Standard | 91    | 2009-11-28 | 2009-11-29 | 2009-12-01 | MAX DATE   |         |
        | Single Standard | 94    | 2009-11-29 |            | 2009-11-29 | 2009-11-30 | true    |
        | Single Standard | 96    | 2009-11-29 |            | 2009-12-01 | MAX DATE   |         |
      }
      expect(master.current_version.price).to eq(94)
      Sequel::Plugins::Bitemporal.at(Date.today-1) do
        expect(master.current_version(:reload => true).price).to eq(98)
      end
      Sequel::Plugins::Bitemporal.at(Date.today+1) do
        expect(master.current_version(:reload => true).price).to eq(93)
      end
      Sequel::Plugins::Bitemporal.at(Date.today+2) do
        expect(master.current_version(:reload => true).price).to eq(96)
      end
      Sequel::Plugins::Bitemporal.as_we_knew_it(Date.today-1) do
        expect(master.current_version(:reload => true).price).to eq(95)
        expect(master.current_version).to be_current
        Sequel::Plugins::Bitemporal.at(Date.today-1) do
          expect(master.current_version(:reload => true).price).to eq(98)
        end
        Sequel::Plugins::Bitemporal.at(Date.today+1) do
          expect(master.current_version(:reload => true).price).to eq(93)
        end
        Sequel::Plugins::Bitemporal.at(Date.today+2) do
          expect(master.current_version(:reload => true).price).to eq(91)
        end
      end
    end
    it "correctly reset time if failure when going back in time" do
      before = Sequel::Plugins::Bitemporal.now
      expect do
        Sequel::Plugins::Bitemporal.at(Date.today+2) do
          raise StandardError, "error during back in time"
        end
      end.to raise_error StandardError
      expect(Sequel::Plugins::Bitemporal.now).to eq(before)
      expect do
        Sequel::Plugins::Bitemporal.as_we_knew_it(Date.today+2) do
          raise StandardError, "error during back in time"
        end
      end.to raise_error StandardError
      expect(Sequel::Plugins::Bitemporal.now).to eq(before)
    end
    it "allows eager loading with conditions on current or future versions" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      Timecop.freeze Date.today+1
      master.update_attributes name: "Single Standard", price: 99
      master.update_attributes name: "Single Standard", price: 94, valid_from: Date.today+2
      res = @master_class.eager_graph(:current_or_future_versions).where(Sequel.negate(Sequel.qualify(:current_or_future_versions, :id) => nil) & {price: 99}).all.first
      expect(res).to be
      expect(res.current_or_future_versions.size).to eq(1)
      expect(res.current_or_future_versions.first.price).to eq(99)
      res = @master_class.eager_graph(:current_or_future_versions).where(Sequel.negate(Sequel.qualify(:current_or_future_versions, :id) => nil) & {price: 94}).all.first
      expect(res).to be
      expect(res.current_or_future_versions.size).to eq(1)
      expect(res.current_or_future_versions.first.price).to eq(94)
      Timecop.freeze Date.today+1
      master.destroy
      expect(@master_class.eager_graph(:current_or_future_versions).where(Sequel.negate(Sequel.qualify(:current_or_future_versions, :id) => nil)).all).to be_empty
    end
    it "allows loading masters with current or future versions" do
      master_destroyed = @master_class.new
      master_destroyed.update_attributes name: "Single Standard", price: 98
      master_destroyed.destroy
      master_with_current = @master_class.new
      master_with_current.update_attributes name: "Single Standard", price: 94
      master_with_future = @master_class.new
      master_with_future.update_attributes name: "Single Standard", price: 94, valid_from: Date.today+2
      expect(@master_class.with_current_or_future_versions.all.size).to eq(2)
    end
    it "delegates attributes from master to pending_or_current_version" do
      master = @master_class.new
      expect(master.name).to be_nil
      master.update_attributes name: "Single Standard", price: 98
      expect(master.name).to eq("Single Standard")
      master.attributes = {name: "King Size"}
      expect(master.name).to eq("King Size")
    end
    it "avoids delegation with option delegate: false" do
      closure = @version_class
      without_delegation_class = Class.new Sequel::Model do
        set_dataset :rooms
        plugin :bitemporal, version_class: closure, delegate: false
      end
      master = without_delegation_class.new
      expect{ master.name }.to raise_error NoMethodError
    end
    it "get current_version association name from class name" do
      class MyNameVersion < Sequel::Model
        set_dataset :room_versions
      end
      class MyName < Sequel::Model
        set_dataset :rooms
        plugin :bitemporal, version_class: MyNameVersion
      end
      expect do
        MyName.eager_graph(:current_version).where(Sequel.lit("my_name_current_version.id IS NOT NULL")).first
      end.not_to raise_error
      Object.send :remove_const, :MyName
      Object.send :remove_const, :MyNameVersion
    end
    it "can update master and current version at the same time" do
      master = @master_class.new.update_attributes name: "Single Standard", price: 98
      master.disabled = true
      master.update_attributes price: 94
      expect(master.reload.disabled).to be_truthy
    end
    it "uses current version for partial_update even if valid_from is specified" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98, valid_from: Date.today-2, valid_to: Date.today
      master.update_attributes name: "Single Standard", price: 94
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 |            | 2009-11-26 | 2009-11-28 |         |
        | Single Standard | 94    | 2009-11-28 |            | 2009-11-28 | MAX DATE   | true    |
      }
      master.update_attributes name: "King Size", valid_from: Date.today-2
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-28 | 2009-11-26 | 2009-11-28 |         |
        | Single Standard | 94    | 2009-11-28 |            | 2009-11-28 | MAX DATE   | true    |
        | King Size       | 94    | 2009-11-28 |            | 2009-11-26 | 2009-11-28 |         |
      }
    end
    it "as_we_knew_it also allows creating and deleting at that time" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98
      Sequel::Plugins::Bitemporal.as_we_knew_it(Date.today+1) do
        master.update_attributes name: "King Size"
      end
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | MAX DATE   | true    |
        | King Size       | 98    | 2009-11-29 |            | 2009-11-28 | MAX DATE   |         |
      }
      Sequel::Plugins::Bitemporal.as_we_knew_it(Date.today+2) do
        master.current_version(:reload => true).destroy
      end
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-28 | MAX DATE   | true    |
        | King Size       | 98    | 2009-11-29 | 2009-11-30 | 2009-11-28 | MAX DATE   |         |
        | King Size       | 98    | 2009-11-30 |            | 2009-11-28 | 2009-11-28 |         |
      }
    end
    it "combines as_we_knew_it and at to set valid_from" do
      master = @master_class.new
      master.update_attributes name: "Single Standard", price: 98, valid_from: Date.today-2, valid_to: Date.today
      master.update_attributes name: "Single Standard", price: 94
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 |            | 2009-11-26 | 2009-11-28 |         |
        | Single Standard | 94    | 2009-11-28 |            | 2009-11-28 | MAX DATE   | true    |
      }
      Sequel::Plugins::Bitemporal.as_we_knew_it(Date.today+1) do
        Sequel::Plugins::Bitemporal.at(Date.today-1) do
          master.update_attributes name: "King Size"
        end
      end
      expect(master).to have_versions %Q{
        | name            | price | created_at | expired_at | valid_from | valid_to   | current |
        | Single Standard | 98    | 2009-11-28 | 2009-11-29 | 2009-11-26 | 2009-11-28 |         |
        | Single Standard | 94    | 2009-11-28 |            | 2009-11-28 | MAX DATE   | true    |
        | Single Standard | 98    | 2009-11-29 |            | 2009-11-26 | 2009-11-27 |         |
        | King Size       | 98    | 2009-11-29 |            | 2009-11-27 | 2009-11-28 |         |
      }
    end
    context "#deleted?" do
      subject{ @master_class.new }
      it "is false unless persisted" do
        expect(subject).not_to be_deleted
      end
      it "is false when persisted with a current version" do
        expect(subject.update_attributes(name: "Single Standard", price: 94)).not_to be_deleted
      end
      it "is true when persisted without a current version" do
        expect(subject.update_attributes(name: "Single Standard", price: 94, valid_from: Date.today+1)).to be_deleted
      end
    end
    context "#last_version" do
      subject{ @master_class.new }
      it "is nil unless persisted" do
        expect(subject.last_version).to be_nil
      end
      it "is current version when persisted with a current version" do
        subject.update_attributes name: "Single Standard", price: 94
        expect(subject.last_version).to eq(subject.current_version)
      end
      it "is nil with future version but no current version" do
        subject.update_attributes name: "Single Standard", price: 94, valid_from: Date.today+1
        expect(subject.last_version).to be_nil
      end
      it "is last version with previous version but no current version" do
        subject.update_attributes name: "Single Standard", price: 94, valid_from: Date.today-2, valid_to: Date.today-1
        expect(subject.current_version).to be_nil
        expect(subject.last_version).to eq(subject.versions.last)
      end
    end
    context "#restore" do
      subject{ @master_class.new }
      it "make last version current" do
        subject.update_attributes name: "Single Standard", price: 94, valid_from: Date.today-2, valid_to: Date.today-1
        subject.restore
        expect(subject.current_version).to eq(subject.last_version)
      end
      it "can add additional attributes to apply" do
        subject.update_attributes name: "Single Standard", price: 94, valid_from: Date.today-2, valid_to: Date.today-1
        subject.restore name: "New Standard"
        expect(subject.current_version.name).to eq("New Standard")
        expect(subject.current_version.price).to eq(94)
      end
    end
  end

  RSpec.describe "Sequel::Plugins::Bitemporal", "with audit and ranges" do
    before :all do
      @audit_class = Class.new do
        def self.audit(*args); end
      end
      db_setup audit_class: @audit_class, ranges: true
    end
    before do
      Timecop.freeze 2009, 11, 28
    end
    after do
      Timecop.return
    end
    let(:author){ double :author, audit_kind: "user" }
    it "generates a new audit on creation" do
      master = @master_class.new
      expect(master).to receive(:updated_by).and_return author
      expect(@audit_class).to receive(:audit).with(
        master,
        {},
        hash_including({name: "Single Standard", price: 98}),
        Date.today,
        author
      )
      master.update_attributes name: "Single Standard", price: 98
    end
    it "generates a new audit on full update" do
      master = @master_class.new
      expect(master).to receive(:updated_by).twice.and_return author
      master.update_attributes name: "Single Standard", price: 98
      expect(@audit_class).to receive(:audit).with(
        master,
        hash_including({name: "Single Standard", price: 98}),
        hash_including({name: "King size", price: 98}),
        Date.today,
        author
      )
      master.update_attributes name: "King size", price: 98
    end
    it "generates a new audit on partial update" do
      master = @master_class.new
      expect(master).to receive(:updated_by).twice.and_return author
      master.update_attributes name: "Single Standard", price: 98
      expect(@audit_class).to receive(:audit).with(
        master,
        hash_including({name: "Single Standard", price: 98}),
        hash_including({name: "King size", price: 98}),
        Date.today,
        author
      )
      master.update_attributes name: "King size", price: 98
    end
    it "generate a new audit for each future version update when propagating changes" do
      propagate_per_column = @master_class.propagate_per_column
      begin
        @master_class.instance_variable_set :@propagate_per_column, true
        master = @master_class.new
        expect(master).to receive(:updated_by).exactly(8).times.and_return author

        master.update_attributes name: "Single Standard", price: 12, length: nil, width: 1
        initial_today = Date.today
        Timecop.freeze initial_today+1 do
          Sequel::Plugins::Bitemporal.at initial_today+4 do
            master.update_attributes valid_from: initial_today+4, name: "King Size", price: 15, length: 2, width: 2
            expect(master.propagated_during_last_save.size).to eq(0)
          end
        end
        Timecop.freeze initial_today+2 do
          Sequel::Plugins::Bitemporal.at initial_today+3 do
            master.update_attributes valid_from: initial_today+3, length: 1, width: 1
            expect(master.propagated_during_last_save.size).to eq(0)
          end
        end
        expect(@audit_class).to receive(:audit).with(
          master,
          hash_including({name: "Single Standard", price: 12, length: nil, width: 1}),
          hash_including({name: "Single Standard", price: 12, length: 3, width: 4}),
          initial_today+2,
          author
        )
        expect(@audit_class).to receive(:audit).with(
          master,
          hash_including({name: "Single Standard", price: 12, length: 1, width: 1}),
          hash_including({name: "Single Standard", price: 12, length: 1, width: 4}),
          initial_today+3,
          author
        )
        Timecop.freeze initial_today+3 do
          Sequel::Plugins::Bitemporal.at initial_today+2 do
            master.update_attributes valid_from: initial_today+2, length: 3, width: 4
            expect(master.propagated_during_last_save.size).to eq(1)
          end
        end
      ensure
        @master_class.instance_variable_set :@propagate_per_column, propagate_per_column
      end
    end
  end
  RSpec.describe "Sequel::Plugins::Bitemporal", "with audit, ranges, specifying how to get the author" do
    before :all do
      @audit_class = Class.new do
        def self.audit(*args); end
      end
      db_setup audit_class: @audit_class, audit_updated_by_method: :author, ranges: true
    end
    let(:author){ double :author, audit_kind: "user" }
    before do
      Timecop.freeze 2009, 11, 28
    end
    after do
      Timecop.return
    end
    it "generates a new audit on creation" do
      master = @master_class.new
      expect(master).to receive(:author).and_return author
      expect(@audit_class).to receive(:audit).with(
        master,
        {},
        hash_including({name: "Single Standard", price: 98}),
        Date.today,
        author
      )
      master.update_attributes name: "Single Standard", price: 98
    end
    it "generates a new audit on full update" do
      master = @master_class.new
      expect(master).to receive(:author).twice.and_return author
      master.update_attributes name: "Single Standard", price: 98
      expect(@audit_class).to receive(:audit).with(
        master,
        hash_including({name: "Single Standard", price: 98}),
        hash_including({name: "King size", price: 98}),
        Date.today,
        author
      )
      master.update_attributes name: "King size", price: 98
    end
    it "generates a new audit on partial update" do
      master = @master_class.new
      expect(master).to receive(:author).twice.and_return author
      master.update_attributes name: "Single Standard", price: 98
      expect(@audit_class).to receive(:audit).with(
        master,
        hash_including({name: "Single Standard", price: 98}),
        hash_including({name: "King size", price: 98}),
        Date.today,
        author
      )
      master.update_attributes name: "King size", price: 98
    end
  end
end