<?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 SubTest extends TestFixture
{
   public function testSubYearsPositive()
   {
      $this->assertSame(1974, Carbon::createFromDate(1975)->subYears(1)->year);
   }
   public function testSubYearsZero()
   {
      $this->assertSame(1975, Carbon::createFromDate(1975)->subYears(0)->year);
   }
   public function testSubYearsNegative()
   {
      $this->assertSame(1976, Carbon::createFromDate(1975)->subYears(-1)->year);
   }

   public function testSubYear()
   {
      $this->assertSame(1974, Carbon::createFromDate(1975)->subYear()->year);
   }

   public function testSubMonthsPositive()
   {
      $this->assertSame(12, Carbon::createFromDate(1975, 1, 1)->subMonths(1)->month);
   }
   public function testSubMonthsZero()
   {
      $this->assertSame(1, Carbon::createFromDate(1975, 1, 1)->subMonths(0)->month);
   }
   public function testSubMonthsNegative()
   {
      $this->assertSame(2, Carbon::createFromDate(1975, 1, 1)->subMonths(-1)->month);
   }

   public function testSubMonth()
   {
      $this->assertSame(12, Carbon::createFromDate(1975, 1, 1)->subMonth()->month);
   }

   public function testSubDaysPositive()
   {
      $this->assertSame(30, Carbon::createFromDate(1975, 5, 1)->subDays(1)->day);
   }
   public function testSubDaysZero()
   {
      $this->assertSame(1, Carbon::createFromDate(1975, 5, 1)->subDays(0)->day);
   }
   public function testSubDaysNegative()
   {
      $this->assertSame(2, Carbon::createFromDate(1975, 5, 1)->subDays(-1)->day);
   }

   public function testSubDay()
   {
      $this->assertSame(30, Carbon::createFromDate(1975, 5, 1)->subDay()->day);
   }

   public function testSubWeekdaysPositive()
   {
      $this->assertSame(22, Carbon::createFromDate(2012, 1, 4)->subWeekdays(9)->day);
   }
   public function testSubWeekdaysZero()
   {
      $this->assertSame(4, Carbon::createFromDate(2012, 1, 4)->subWeekdays(0)->day);
   }
   public function testSubWeekdaysNegative()
   {
      $this->assertSame(13, Carbon::createFromDate(2012, 1, 31)->subWeekdays(-9)->day);
   }

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

   public function testSubWeeksPositive()
   {
      $this->assertSame(14, Carbon::createFromDate(1975, 5, 21)->subWeeks(1)->day);
   }
   public function testSubWeeksZero()
   {
      $this->assertSame(21, Carbon::createFromDate(1975, 5, 21)->subWeeks(0)->day);
   }
   public function testSubWeeksNegative()
   {
      $this->assertSame(28, Carbon::createFromDate(1975, 5, 21)->subWeeks(-1)->day);
   }

   public function testSubWeek()
   {
      $this->assertSame(14, Carbon::createFromDate(1975, 5, 21)->subWeek()->day);
   }

   public function testSubHoursPositive()
   {
      $this->assertSame(23, Carbon::createFromTime(0)->subHours(1)->hour);
   }
   public function testSubHoursZero()
   {
      $this->assertSame(0, Carbon::createFromTime(0)->subHours(0)->hour);
   }
   public function testSubHoursNegative()
   {
      $this->assertSame(1, Carbon::createFromTime(0)->subHours(-1)->hour);
   }

   public function testSubHour()
   {
      $this->assertSame(23, Carbon::createFromTime(0)->subHour()->hour);
   }

   public function testSubMinutesPositive()
   {
      $this->assertSame(59, Carbon::createFromTime(0, 0)->subMinutes(1)->minute);
   }
   public function testSubMinutesZero()
   {
      $this->assertSame(0, Carbon::createFromTime(0, 0)->subMinutes(0)->minute);
   }
   public function testSubMinutesNegative()
   {
      $this->assertSame(1, Carbon::createFromTime(0, 0)->subMinutes(-1)->minute);
   }

   public function testSubMinute()
   {
      $this->assertSame(59, Carbon::createFromTime(0, 0)->subMinute()->minute);
   }

   public function testSubSecondsPositive()
   {
      $this->assertSame(59, Carbon::createFromTime(0, 0, 0)->subSeconds(1)->second);
   }
   public function testSubSecondsZero()
   {
      $this->assertSame(0, Carbon::createFromTime(0, 0, 0)->subSeconds(0)->second);
   }
   public function testSubSecondsNegative()
   {
      $this->assertSame(1, Carbon::createFromTime(0, 0, 0)->subSeconds(-1)->second);
   }

   public function testSubSecond()
   {
      $this->assertSame(59, Carbon::createFromTime(0, 0, 0)->subSecond()->second);
   }
}