Unit testing effectively - Test example (Part II)

MyBusinessLogicTest.php

<?php 

declare(strict_types=1);

namespace CompanyTest\Domain;

use PHPUnit\Framework\TestCase;

final class MyBusinessLogicTest extends TestCase
{
    /**
     * @dataProvider providerApplySomeLogic
     */
    public function test_apply_some_logic(
        array $concreteMapping, 
        string $argInput, 
        ReturnType $expected
    ): void {
        $myBusinessLogic = $this->createBusinessLogic($concreteMapping);
        $input = $this->createInput($argInput);
        $returnType = $myBusinessLogic->applySomeLogic($input);

        self::assertEquals($expected, $returnType);
    }

    public function providerApplySomeLogic(): Generator
    {
        yield 'scenario A' => [
            'concreteMapping' => ['key' => 'value'],
            'argInput' => 'something',
            'expected' => ReturnType::withProperty('expected-value-A'),
        ];

        yield 'scenario B' => [
            'concreteMapping' => ['key2' => 'value2'],
            'argInput' => 'something-else',
            'expected' => ReturnType::withProperty('expected-value-B'),
        ];
    }

    private function createBusinessLogic(array $concreteMapping): MyBusinessLogic
    {
        return new MyBusinessLogic(
            new FakeDependency(),
            new ConcreteDependency($concreteMapping),
            /* ... */
        );
    }

    private function createInput(string $argInput): Input
    {
        return new Input($argInput, /* ... */);
    }
}

final class FakeDependency implements DependencyInterface 
{
    public function getSomeValue(): string
    {
        return 'A value for your test';
    }
}