Maybe/test/models/transfer/creator_test.rb

require "test_helper"

class Transfer::CreatorTest < ActiveSupport::TestCase
  setup do
    @family = families(:dylan_family)
    @source_account = accounts(:depository)
    @destination_account = accounts(:investment)
    @date = Date.current
    @amount = 100
  end

  test "creates basic transfer" do
    creator = Transfer::Creator.new(
      family: @family,
      source_account_id: @source_account.id,
      destination_account_id: @destination_account.id,
      date: @date,
      amount: @amount
    )

    transfer = creator.create

    assert transfer.persisted?
    assert_equal "confirmed", transfer.status
    assert transfer.regular_transfer?
    assert_equal "transfer", transfer.transfer_type

    # Verify outflow transaction (from source account)
    outflow = transfer.outflow_transaction
    assert_equal "funds_movement", outflow.kind
    assert_equal @amount, outflow.entry.amount
    assert_equal @source_account.currency, outflow.entry.currency
    assert_equal "Transfer to #{@destination_account.name}", outflow.entry.name

    # Verify inflow transaction (to destination account)
    inflow = transfer.inflow_transaction
    assert_equal "funds_movement", inflow.kind
    assert_equal(@amount * -1, inflow.entry.amount)
    assert_equal @destination_account.currency, inflow.entry.currency
    assert_equal "Transfer from #{@source_account.name}", inflow.entry.name
  end

  test "creates multi-currency transfer" do
    # Use crypto account which has USD currency but different from source
    crypto_account = accounts(:crypto)

    creator = Transfer::Creator.new(
      family: @family,
      source_account_id: @source_account.id,
      destination_account_id: crypto_account.id,
      date: @date,
      amount: @amount
    )

    transfer = creator.create

    assert transfer.persisted?
    assert transfer.regular_transfer?
    assert_equal "transfer", transfer.transfer_type

    # Verify outflow transaction
    outflow = transfer.outflow_transaction
    assert_equal "funds_movement", outflow.kind
    assert_equal "Transfer to #{crypto_account.name}", outflow.entry.name

    # Verify inflow transaction with currency handling
    inflow = transfer.inflow_transaction
    assert_equal "funds_movement", inflow.kind
    assert_equal "Transfer from #{@source_account.name}", inflow.entry.name
    assert_equal crypto_account.currency, inflow.entry.currency
  end

  test "creates loan payment" do
    loan_account = accounts(:loan)

    creator = Transfer::Creator.new(
      family: @family,
      source_account_id: @source_account.id,
      destination_account_id: loan_account.id,
      date: @date,
      amount: @amount
    )

    transfer = creator.create

    assert transfer.persisted?
    assert transfer.loan_payment?
    assert_equal "loan_payment", transfer.transfer_type

    # Verify outflow transaction is marked as loan payment
    outflow = transfer.outflow_transaction
    assert_equal "loan_payment", outflow.kind
    assert_equal "Payment to #{loan_account.name}", outflow.entry.name

    # Verify inflow transaction
    inflow = transfer.inflow_transaction
    assert_equal "funds_movement", inflow.kind
    assert_equal "Payment from #{@source_account.name}", inflow.entry.name
  end

  test "creates credit card payment" do
    credit_card_account = accounts(:credit_card)

    creator = Transfer::Creator.new(
      family: @family,
      source_account_id: @source_account.id,
      destination_account_id: credit_card_account.id,
      date: @date,
      amount: @amount
    )

    transfer = creator.create

    assert transfer.persisted?
    assert transfer.liability_payment?
    assert_equal "liability_payment", transfer.transfer_type

    # Verify outflow transaction is marked as payment for liability
    outflow = transfer.outflow_transaction
    assert_equal "cc_payment", outflow.kind
    assert_equal "Payment to #{credit_card_account.name}", outflow.entry.name

    # Verify inflow transaction
    inflow = transfer.inflow_transaction
    assert_equal "funds_movement", inflow.kind
    assert_equal "Payment from #{@source_account.name}", inflow.entry.name
  end

  test "raises error when source account ID is invalid" do
    assert_raises(ActiveRecord::RecordNotFound) do
      Transfer::Creator.new(
        family: @family,
        source_account_id: 99999,
        destination_account_id: @destination_account.id,
        date: @date,
        amount: @amount
      )
    end
  end

  test "raises error when destination account ID is invalid" do
    assert_raises(ActiveRecord::RecordNotFound) do
      Transfer::Creator.new(
        family: @family,
        source_account_id: @source_account.id,
        destination_account_id: 99999,
        date: @date,
        amount: @amount
      )
    end
  end

  test "raises error when source account belongs to different family" do
    other_family = families(:empty)

    assert_raises(ActiveRecord::RecordNotFound) do
      Transfer::Creator.new(
        family: other_family,
        source_account_id: @source_account.id,
        destination_account_id: @destination_account.id,
        date: @date,
        amount: @amount
      )
    end
  end
end