php-ml/tests/Phpml/Math/ProductTest.php

<?php

declare(strict_types=1);

namespace tests\Phpml\Math;

use Phpml\Math\Product;
use PHPUnit\Framework\TestCase;

class ProductTest extends TestCase
{
    public function testScalarProduct()
    {
        $this->assertEquals(10, Product::scalar([2, 3], [-1, 4]));
        $this->assertEquals(-0.1, Product::scalar([1, 4, 1], [-2, 0.5, -0.1]));
        $this->assertEquals(8, Product::scalar([2], [4]));

        //test for non numeric values
        $this->assertEquals(0, Product::scalar(['', null, [], new \stdClass()], [null]));
    }
}