如何用Laravel，PHPUnit，Prophecy，DI模拟或存根

Question

你好，我正试图让我的第一次嘲弄或固执测试与预言工作。我从来没有用过嘲弄、存根或嘲弄。我做了相当多的单元测试，其中依赖关系并没有真正发挥作用，等等。

如果我能让这个测试正常工作，我想它将帮助我进一步测试我的代码。任何帮助都将不胜感激！

首先是错误..。

Method `Double\App\Services\Maintenance\Flags\MaintenanceFlagsProvider\P1::findMostRecentByLabel()` is not defined.
/Library/WebServer/App/tests/unit/MaintenanceStatusTests.php:21

这是测试类的相关部分..。

use App\Services\Maintenance\Logs\MaintenanceLogProvider;
use App\Services\Maintenance\Flags\MaintenanceFlagsProvider;
use App\Services\Maintenance\NextDueSchedules\NextDueScheduleProvider;
use App\Services\Components\Requirements\Status\RequirementStatusProvider;
use App\Services\Components\Requirements\Properties\ComponentRequirementPropertiesProvider;

class MaintenanceStatusTests extends TestCase
{
    /** @test */
    public function is_initial_returns_true()
    {
        $status = $this->buildStatus();

        $status->maintenance_flags_provider->shouldReceive('findMostRecentByLabel')->andReturn(new MaintenanceFlag(['value' => 1]));

        $this->assertTrue($status->isInitial());

    }

    private function buildStatus()
    {
        $maintenance_flags_provider = $this->prophesize(MaintenanceFlagsProvider::class);
        $maintenance_log_provider = $this->prophesize(MaintenanceLogProvider::class);
        $next_due_schedule_provider = $this->prophesize(NextDueScheduleProvider::class);
        $component_requirement_properties_provider = $this->prophesize(ComponentRequirementPropertiesProvider::class);

        return new RequirementStatusProvider($maintenance_flags_provider->reveal(), $maintenance_log_provider->reveal(), $next_due_schedule_provider->reveal(), $component_requirement_properties_provider->reveal());
    }
}

下面是我试图测试的类/方法的相关部分.

namespace App\Services\Components\Requirements\Status;

use Carbon, StdClass;
use App\Services\Maintenance\Logs\MaintenanceLogProvider;
use App\Services\Maintenance\Flags\MaintenanceFlagsProvider;
use App\Services\Maintenance\NextDueSchedules\NextDueScheduleProvider;
use App\Services\Components\Requirements\Properties\ComponentRequirementPropertiesProvider;

class RequirementStatusProvider
{
    public $maintenance_flags_provider;
    public $maintenance_log_provider;
    public $next_due_schedule_provider;
    public $component_requirement_properties_provider;

    public $data;

    /**
     * @param MaintenanceFlagsProvider $maintenance_flags_provider
     * @param MaintenanceLogProvider $maintenance_log_provider
     * @param NextDueScheduleProvider $next_due_schedule_provider
     * @param ComponentRequirementPropertiesProvider $component_requirement_properties_provider
     */
    public function __construct(MaintenanceFlagsProvider $maintenance_flags_provider, MaintenanceLogProvider $maintenance_log_provider, NextDueScheduleProvider $next_due_schedule_provider, ComponentRequirementPropertiesProvider $component_requirement_properties_provider)
    {
        $this->data = new StdClass();

        $this->maintenance_flags_provider = $maintenance_flags_provider;
        $this->maintenance_log_provider = $maintenance_log_provider;
        $this->next_due_schedule_provider = $next_due_schedule_provider;
        $this->component_requirement_properties_provider = $component_requirement_properties_provider;
    }

// THIS IS WHAT I'M TRYING TO TEST ....
    public function isInitial()
    {
        $flag = $this->maintenance_flags_provider->findMostRecentByLabel('initial', $this->component->id, $this->requirement->id, $this->data->datetime);

        return (($flag && 1 == $flag->getAttribute('value')) || ! $this->data->pcw_logs[0]->event_at) ? 1 : 0;
    }
}

我还以下列方式修改了考试.

/** @test */
public function is_initial_returns_true()
{
    $maintenance_log_provider = $this->prophesize(MaintenanceLogProvider::class);
    $maintenance_flags_provider = $this->prophesize(MaintenanceFlagsProvider::class);
    $next_due_schedule_provider = $this->prophesize(NextDueScheduleProvider::class);
    $component_requirement_properties_provider = $this->prophesize(ComponentRequirementPropertiesProvider::class);

    $maintenance_flags_provider->findMostRecentByLabel('initial', 1, 1, Carbon::now())->willReturn(new MaintenanceFlag(['value' => 1]));

    $status = new RequirementStatusProvider($maintenance_flags_provider->reveal(), $maintenance_log_provider->reveal(), $next_due_schedule_provider->reveal(), $component_requirement_properties_provider->reveal());

    $this->assertTrue($status->isInitial());
}

即使我省略了->willReturn部分，我仍然得到了完全相同的错误。

我不希望isInitial调用实际的MaintenanceFlagsProvider类，我希望测试能够伪造该调用，但通过测试将$flag变量设置为任何我想要的(如果这有意义的话)。

Answer 1

部分问题在于我的提供者，它将未定义的方法调用转发到相应的存储库类。我通过在provider类中添加缺少方法的@方法签名，使Prophecy感到高兴。

/**
 * @method findMostRecentByLabel(array $args = [])
 */
class MaintenanceFlagsProvider
{
    ...
}

工作测试..。

/** @test */
public function is_initial_returns_true()
{
    $date = Carbon::now();

    $maintenance_log_provider = $this->prophesize(MaintenanceLogProvider::class);
    $maintenance_flags_provider = $this->prophesize(MaintenanceFlagsProvider::class);
    $next_due_schedule_provider = $this->prophesize(NextDueScheduleProvider::class);
    $component_requirement_properties_provider = $this->prophesize(ComponentRequirementPropertiesProvider::class);

    $maintenance_flags_provider->findMostRecentByLabel('initial', 1, 1, $date)->shouldBeCalled()->willReturn(new MaintenanceFlag(['value' => 1]));

    $status = new RequirementStatusProvider($maintenance_flags_provider->reveal(), $maintenance_log_provider->reveal(), $next_due_schedule_provider->reveal(), $component_requirement_properties_provider->reveal());

    $status->component = (new Component())->forceFill(['id' => 1]);
    $status->requirement = (new MaintenanceRequirement())->forceFill(['id' => 1]);
    $status->data->datetime = $date;

    $this->assertTrue($status->isInitial());
}