Are named parameters a risk to all that we hold near and dear? News at 11.

0-readme.md

This tests behavior on the process "CreateConferenceTicketsForWebinarCustomers".

It's possible to create a working test that looks like the "minimum possible" example. But the "actual" example has additional information that supplements the test. The null parameter with default values pattern is not new.

In this case, the named parameters improve the comprehensibility of the tests.

This is one of hundreds of tests that I've used this technique for. When testing various paths through the same process, being able to swap values in then given/when/then steps can be really beautiful.

Actual-CreatesTicketsForWebinarPurchaseTest.php

<?php

function testCreatesTicketsForWebinarPurchase()
{
    $this->stub(CreateHiddenHopinTickets::class, new CreateHiddenHopinTicketsStub('code', 'ticket url'));

    $this->process(
        CreateConferenceTicketsForWebinarCustomers::class
    )->when(
        $this->hopinRegistrationWasCreated(
            eventName: 'Laracon EU Online Webinar - Style Beautiful Sites with Tailwind CSS'
        )
    )->then(
        $this->freeConferenceTicketWasCreatedForAWebinarCustomer(
            eventName: 'Laracon EU Online Webinar - Style Beautiful Sites with Tailwind CSS',
            ticketReference: $this->ticketReference(
                ticketName: 'Conference Ticket - ' . 'user name',
                ticketDescription: 'Attend the conference sessions on Jan. 18th and 19th.',
                ticketCount: 1,
                ticketCode: 'code'
            )
        )
    );
}

MinimalPossible-CreatesTicketsForWebinarPurchaseTest.php

<?php

function testCreatesTicketsForWebinarPurchase()
{
    $this->stub(CreateHiddenHopinTickets::class, new CreateHiddenHopinTicketsStub('code', 'ticket url'));

    $this->process(
        CreateConferenceTicketsForWebinarCustomers::class
    )->when(
        $this->hopinRegistrationWasCreated()
    )->then(
        $this->freeConferenceTicketWasCreatedForAWebinarCustomer()
    );
}

TestEvents.php

<?php

# This is all from a different file, reused.

function hopinRegistrationWasCreated(
    ?string $id = null,
    ?string $chargeId = null,
    ?string $userName = null,
    ?string $userEmail = null,
    ?string $userHeadline = null,
    ?string $userTown = null,
    ?string $eventName = null,
    ?string $personaLabel = null,
    ?string $persona = null,
    ?Timestamp $createdAt = null
): HopinRegistrationWasCreated {
    return new HopinRegistrationWasCreated(
        $id ?? 'registration id',
        $chargeId ?? 'charge id',
        $userName ?? 'user name',
        $userEmail ?? '[email protected]',
        $userHeadline ?? 'user headline',
        $userTown ?? 'user town',
        $eventName ?? 'event name',
        $personaLabel ?? 'ticket name',
        $persona ?? '60.50',
        $createdAt ?? $this->timestamp()
    );
}

function freeConferenceTicketWasCreatedForAWebinarCustomer(
    ?string $hopinRegistrationId = null,
    ?string $attendeeName = null,
    ?string $attendeeEmail = null,
    ?string $eventName = null,
    ?string $ticketName = null,
    ?string $ticketPrice = null,
    ?HopinTicketReference $ticketReference = null,
    ?Timestamp $createdAt = null,
): FreeConferenceTicketWasCreatedForAWebinarCustomer {
    return new FreeConferenceTicketWasCreatedForAWebinarCustomer(
        $hopinRegistrationId ?? 'registration id',
        $attendeeName ?? 'user name',
        $attendeeEmail ?? '[email protected]',
        $eventName ?? 'event name',
        $ticketName ?? 'ticket name',
        $ticketPrice ?? '60.50',
        $ticketReference ?? $this->ticketReference(),
        $createdAt ?? $this->timestamp(),
    );
}

function ticketReference(
    ?string $eventSlug = null,
    ?string $ticketName = null,
    ?string $ticketDescription = null,
    ?int $ticketCount = null,
    ?string $ticketCode = null,
    ?string $ticketUrl = null
): HopinTicketReference {
    return new HopinTicketReference(
        $eventSlug ?? 'laracon-eu-online-conference',
        $ticketName ?? 'Conference Ticket - invoice company name',
        $ticketDescription ?? 'Attend the conference sessions on Jan. 18th and 19th.',
        $ticketCount ?? 3,
        $ticketCode ?? 'code',
        $ticketUrl ?? 'ticket url'
    );
}