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Use Commanded to build your own Elixir applications following the CQRS/ES pattern.
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Files
test/process_managers/process_manager_routing_test.exs
defmodule Commanded.ProcessManagers.ProcessManagerRoutingTest do
use Commanded.StorageCase
import Commanded.Assertions.EventAssertions
alias Commanded.ExampleDomain.BankRouter
alias Commanded.ExampleDomain.TransferMoneyProcessManager
alias Commanded.ExampleDomain.BankAccount.Commands.OpenAccount
alias Commanded.ExampleDomain.BankAccount.Events.{MoneyDeposited,MoneyWithdrawn}
alias Commanded.ExampleDomain.MoneyTransfer.Commands.TransferMoney
alias Commanded.ExampleDomain.MoneyTransfer.Events.MoneyTransferRequested
alias Commanded.Helpers.CommandAuditMiddleware
alias Commanded.ProcessManagers.ProcessRouter
setup do
CommandAuditMiddleware.start_link()
:ok
end
test "should start a process manager in response to an event" do
account_number1 = UUID.uuid4
account_number2 = UUID.uuid4
transfer_uuid = UUID.uuid4
{:ok, process_router} = TransferMoneyProcessManager.start_link()
assert ProcessRouter.process_instances(process_router) == []
:timer.sleep 500
# create two bank accounts
:ok = BankRouter.dispatch(%OpenAccount{account_number: account_number1, initial_balance: 1_000})
:ok = BankRouter.dispatch(%OpenAccount{account_number: account_number2, initial_balance: 500})
# transfer funds between account 1 and account 2
:ok = BankRouter.dispatch(%TransferMoney{
transfer_uuid: transfer_uuid,
debit_account: account_number1,
credit_account: account_number2,
amount: 100,
})
assert_receive_event MoneyTransferRequested, fn event ->
assert event.debit_account == account_number1
assert event.credit_account == account_number2
assert event.amount == 100
end
assert_receive_event MoneyWithdrawn, fn event ->
assert event.account_number == account_number1
assert event.amount == 100
assert event.balance == 900
end
assert_receive_event MoneyDeposited, fn event ->
assert event.account_number == account_number2
assert event.amount == 100
assert event.balance == 600
end
assert [{^transfer_uuid, _}] = ProcessRouter.process_instances(process_router)
end
end