<?php

declare(strict_types=1);

namespace Tests;

use PHPUnit\Framework\TestCase;
use App\Calculator;
use App\Operation;
use InvalidArgumentException;

class CalculatorTest extends TestCase
{
    private Calculator $calculator;

    protected function setUp(): void
    {
        $this->calculator = new Calculator();
    }

    public function testAdd(): void
    {
        $result = $this->calculator->calculate(10, 5, Operation::ADD);
        $this->assertEquals(15, $result);
    }

    public function testSubtract(): void
    {
        $result = $this->calculator->calculate(10, 5, Operation::SUBTRACT);
        $this->assertEquals(5, $result);
    }

    public function testMultiply(): void
    {
        $result = $this->calculator->calculate(10, 5, Operation::MULTIPLY);
        $this->assertEquals(50, $result);
    }

    public function testDivide(): void
    {
        $result = $this->calculator->calculate(10, 5, Operation::DIVIDE);
        $this->assertEquals(2, $result);
    }

    public function testDivideByZero(): void
    {
        $this->expectException(InvalidArgumentException::class);
        $this->calculator->calculate(10, 0, Operation::DIVIDE);
    }
}