<?php

namespace Chirag\Phptest;

use PHPUnit\Framework\TestCase;

class Calculator
{
	public static function add($a, $b)
	{
		return $a + $b;
	}

	public static function divide($a, $b)
	{
		return $a / $b;
	}
}


class CalculatorTest extends TestCase
{
	// Positive test case for add function
	public function testAdd(): void
	{
		$res = Calculator::add(18, 20);

		$this->assertEquals(38,$res);
	}
 
    // Positive test case for divide function
    public function testDivideByTwo(): void
    {
        $this->assertEquals(1, Calculator::divide(2, 2));
    }

	// Negative test case for add function
    public function testAddNonNumeric(): void
    {
        $this->assertNotEquals(4, Calculator::add("abcd", "pqr"));
    }
 
    // Negative test case for divide function
    public function testDivideeByZero(): void
    {
        $this->assertNotEquals(1, Calculator::divide(1, 0));
 
        $this->assertFalse(is_finite(Calculator::divide(1, 0)));
    }
}