alrahma_sunday_school/tests/app/Controllers/Administrator/FinancialAidControllerTest.php

<?php

namespace Tests\App\Controllers\Administrator;

use App\Controllers\Administrator\FinancialAidController;
use CodeIgniter\Test\CIUnitTestCase;

class FinancialAidRequestStub
{
    public function __construct(private array $post = [])
    {
    }

    public function getPost(?string $key = null)
    {
        if ($key === null) {
            return $this->post;
        }

        return $this->post[$key] ?? null;
    }
}

class TestableFinancialAidController extends FinancialAidController
{
    public function __construct()
    {
    }

    public function setRequestObject($request): self
    {
        $this->request = $request;
        return $this;
    }
}

class FinancialAidControllerTest extends CIUnitTestCase
{
    public function testPostedAdminAmountWinsOverRequestedAmount(): void
    {
        $controller = (new TestableFinancialAidController())
            ->setRequestObject(new FinancialAidRequestStub(['admin_amount' => '175.50']));

        $this->assertSame(175.50, $this->approvalAmount($controller, [
            'requested_amount' => '250.00',
        ]));
    }

    public function testBlankAdminAmountFallsBackToRequestedAmount(): void
    {
        $controller = (new TestableFinancialAidController())
            ->setRequestObject(new FinancialAidRequestStub(['admin_amount' => '']));

        $this->assertSame(250.00, $this->approvalAmount($controller, [
            'requested_amount' => '250.00',
        ]));
    }

    private function approvalAmount(FinancialAidController $controller, array $request): float
    {
        $reflection = new \ReflectionMethod($controller, 'approvalAmount');
        $reflection->setAccessible(true);

        return $reflection->invoke($controller, $request);
    }
}