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<?php 
use PHPUnit\FrameWork\TestCase;
class ExampleTest extends TestCase
{
    public function testAddTwo(){
        $arr =[10,20];
        $this->assertIsArray($arr);
        $this->assertEquals(sizeof($arr),2);

    }

    public function testMulTwo(){
        $this->assertEquals(4,2*2);
    }


    public function testDivTwo(){
        $this->assertEquals(1,2/2);
    }

    public function testSubTwo(){
        $this->assertEquals(0,2-2);
    }

}
?>