<?php

/*
 * This file is part of the Carbon package.
 *
 * (c) Brian Nesbitt <brian@nesbot.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Carbon\Tests;

use Carbon\Carbon;

class AddTest extends TestFixture
{
   public function testAddYearsPositive()
   {
      $this->assertSame(1976, Carbon::createFromDate(1975)->addYears(1)->year);
   }
   public function testAddYearsZero()
   {
      $this->assertSame(1975, Carbon::createFromDate(1975)->addYears(0)->year);
   }
   public function testAddYearsNegative()
   {
      $this->assertSame(1974, Carbon::createFromDate(1975)->addYears(-1)->year);
   }

   public function testAddYear()
   {
      $this->assertSame(1976, Carbon::createFromDate(1975)->addYear()->year);
   }

   public function testAddMonthsPositive()
   {
      $this->assertSame(1, Carbon::createFromDate(1975, 12)->addMonths(1)->month);
   }
   public function testAddMonthsZero()
   {
      $this->assertSame(12, Carbon::createFromDate(1975, 12)->addMonths(0)->month);
   }
   public function testAddMonthsNegative()
   {
      $this->assertSame(11, Carbon::createFromDate(1975, 12, 1)->addMonths(-1)->month);
   }

   public function testAddMonth()
   {
      $this->assertSame(1, Carbon::createFromDate(1975, 12)->addMonth()->month);
   }
   public function testAddMonthWithOverflow()
   {
      $this->assertSame(3, Carbon::createFromDate(2012, 1, 31)->addMonth()->month);
   }

   public function testAddDaysPositive()
   {
      $this->assertSame(1, Carbon::createFromDate(1975, 5, 31)->addDays(1)->day);
   }
   public function testAddDaysZero()
   {
      $this->assertSame(31, Carbon::createFromDate(1975, 5, 31)->addDays(0)->day);
   }
   public function testAddDaysNegative()
   {
      $this->assertSame(30, Carbon::createFromDate(1975, 5, 31)->addDays(-1)->day);
   }

   public function testAddDay()
   {
      $this->assertSame(1, Carbon::createFromDate(1975, 5, 31)->addDay()->day);
   }

   public function testAddWeekdaysPositive()
   {
      $this->assertSame(17, Carbon::createFromDate(2012, 1, 4)->addWeekdays(9)->day);
   }
   public function testAddWeekdaysZero()
   {
      $this->assertSame(4, Carbon::createFromDate(2012, 1, 4)->addWeekdays(0)->day);
   }
   public function testAddWeekdaysNegative()
   {
      $this->assertSame(18, Carbon::createFromDate(2012, 1, 31)->addWeekdays(-9)->day);
   }

   public function testAddWeekday()
   {
      $this->assertSame(9, Carbon::createFromDate(2012, 1, 6)->addWeekday()->day);
   }

   public function testAddWeeksPositive()
   {
      $this->assertSame(28, Carbon::createFromDate(1975, 5, 21)->addWeeks(1)->day);
   }
   public function testAddWeeksZero()
   {
      $this->assertSame(21, Carbon::createFromDate(1975, 5, 21)->addWeeks(0)->day);
   }
   public function testAddWeeksNegative()
   {
      $this->assertSame(14, Carbon::createFromDate(1975, 5, 21)->addWeeks(-1)->day);
   }

   public function testAddWeek()
   {
      $this->assertSame(28, Carbon::createFromDate(1975, 5, 21)->addWeek()->day);
   }

   public function testAddHoursPositive()
   {
      $this->assertSame(1, Carbon::createFromTime(0)->addHours(1)->hour);
   }
   public function testAddHoursZero()
   {
      $this->assertSame(0, Carbon::createFromTime(0)->addHours(0)->hour);
   }
   public function testAddHoursNegative()
   {
      $this->assertSame(23, Carbon::createFromTime(0)->addHours(-1)->hour);
   }

   public function testAddHour()
   {
      $this->assertSame(1, Carbon::createFromTime(0)->addHour()->hour);
   }

   public function testAddMinutesPositive()
   {
      $this->assertSame(1, Carbon::createFromTime(0, 0)->addMinutes(1)->minute);
   }
   public function testAddMinutesZero()
   {
      $this->assertSame(0, Carbon::createFromTime(0, 0)->addMinutes(0)->minute);
   }
   public function testAddMinutesNegative()
   {
      $this->assertSame(59, Carbon::createFromTime(0, 0)->addMinutes(-1)->minute);
   }

   public function testAddMinute()
   {
      $this->assertSame(1, Carbon::createFromTime(0, 0)->addMinute()->minute);
   }

   public function testAddSecondsPositive()
   {
      $this->assertSame(1, Carbon::createFromTime(0, 0, 0)->addSeconds(1)->second);
   }
   public function testAddSecondsZero()
   {
      $this->assertSame(0, Carbon::createFromTime(0, 0, 0)->addSeconds(0)->second);
   }
   public function testAddSecondsNegative()
   {
      $this->assertSame(59, Carbon::createFromTime(0, 0, 0)->addSeconds(-1)->second);
   }

   public function testAddSecond()
   {
      $this->assertSame(1, Carbon::createFromTime(0, 0, 0)->addSecond()->second);
   }
}