<?php

namespace Drupal\Tests\commerce_price\Unit;

use Drupal\Tests\UnitTestCase;
use Drupal\commerce_price\Calculator;

/**
 * Tests the Calculator class.
 *
 * @group commerce
 * @coversDefaultClass \Drupal\commerce_price\Calculator
 */
class CalculatorTest extends UnitTestCase {

  /**
   * @covers ::add
   * @covers ::subtract
   * @covers ::multiply
   * @covers ::divide
   * @covers ::compare
   * @covers ::trim
   */
  public function testArithmetic() {
    $this->assertEquals('11', Calculator::add('5', '6'));
    $this->assertEquals('-9', Calculator::subtract('11', '20'));
    $this->assertEquals('132', Calculator::multiply('11', '12'));
    $this->assertEquals('12.012', Calculator::divide('132.132', '11'));

    $this->assertEquals('3', Calculator::trim('3.00'));
    $this->assertEquals('3.03', Calculator::trim('3.030'));
  }

  /**
   * @covers ::compare
   */
  public function testComparison() {
    $this->assertEquals('0', Calculator::compare('1', '1'));
    $this->assertEquals('1', Calculator::compare('2', '1'));
    $this->assertEquals('-1', Calculator::compare('1', '2'));
  }

  /**
   * @covers ::ceil
   * @covers ::floor
   * @covers ::round
   */
  public function testRounding() {
    $this->assertEquals('5', Calculator::ceil('4.4'));
    $this->assertEquals('-4', Calculator::ceil('-4.4'));

    $this->assertEquals('4', Calculator::floor('4.8'));
    $this->assertEquals('-5', Calculator::floor('-4.8'));

    $rounding_data = [
      ['1.95583', 2, PHP_ROUND_HALF_UP, '1.96'],
      ['9.4', 0, PHP_ROUND_HALF_UP, '9'],
      ['9.6', 0, PHP_ROUND_HALF_UP, '10'],

      ['9.5', 0, PHP_ROUND_HALF_UP, '10'],
      ['9.5', 0, PHP_ROUND_HALF_DOWN, '9'],
      ['9.5', 0, PHP_ROUND_HALF_EVEN, '10'],
      ['9.5', 0, PHP_ROUND_HALF_ODD, '9'],

      ['8.5', 0, PHP_ROUND_HALF_UP, '9'],
      ['8.5', 0, PHP_ROUND_HALF_DOWN, '8'],
      ['8.5', 0, PHP_ROUND_HALF_EVEN, '8'],
      ['8.5', 0, PHP_ROUND_HALF_ODD, '9'],

      ['1.55', 1, PHP_ROUND_HALF_UP, '1.6'],
      ['1.54', 1, PHP_ROUND_HALF_UP, '1.5'],
      ['-1.55', 1, PHP_ROUND_HALF_UP, '-1.6'],
      ['-1.54', 1, PHP_ROUND_HALF_UP, '-1.5'],

      ['1.55', 1, PHP_ROUND_HALF_DOWN, '1.5'],
      ['1.54', 1, PHP_ROUND_HALF_DOWN, '1.5'],
      ['-1.55', 1, PHP_ROUND_HALF_DOWN, '-1.5'],
      ['-1.54', 1, PHP_ROUND_HALF_DOWN, '-1.5'],

      ['1.55', 1, PHP_ROUND_HALF_EVEN, '1.6'],
      ['1.54', 1, PHP_ROUND_HALF_EVEN, '1.5'],
      ['-1.55', 1, PHP_ROUND_HALF_EVEN, '-1.6'],
      ['-1.54', 1, PHP_ROUND_HALF_EVEN, '-1.5'],

      ['1.55', 1, PHP_ROUND_HALF_ODD, '1.5'],
      ['1.54', 1, PHP_ROUND_HALF_ODD, '1.5'],
      ['-1.55', 1, PHP_ROUND_HALF_ODD, '-1.5'],
      ['-1.54', 1, PHP_ROUND_HALF_ODD, '-1.5'],
    ];
    foreach ($rounding_data as $item) {
      $this->assertEquals($item[3], Calculator::round($item[0], $item[1], $item[2]));
    }
  }

}
