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<?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\Traits;
use Closure;
use DateTimeImmutable;
trait Test
{
///////////////////////////////////////////////////////////////////
///////////////////////// TESTING AIDS ////////////////////////////
///////////////////////////////////////////////////////////////////
/**
* A test Carbon instance to be returned when now instances are created.
*
* @var static
*/
protected static $testNow;
/**
* Set a Carbon instance (real or mock) to be returned when a "now"
* instance is created. The provided instance will be returned
* specifically under the following conditions:
* - A call to the static now() method, ex. Carbon::now()
* - When a null (or blank string) is passed to the constructor or parse(), ex. new Carbon(null)
* - When the string "now" is passed to the constructor or parse(), ex. new Carbon('now')
* - When a string containing the desired time is passed to Carbon::parse().
*
* Note the timezone parameter was left out of the examples above and
* has no affect as the mock value will be returned regardless of its value.
*
* To clear the test instance call this method using the default
* parameter of null.
*
* /!\ Use this method for unit tests only.
*
* @param Closure|static|string|false|null $testNow real or mock Carbon instance
*/
public static function setTestNow($testNow = null)
{
if ($testNow === false) {
$testNow = null;
}
static::$testNow = \is_string($testNow) ? static::parse($testNow) : $testNow;
}
/**
* Temporarily sets a static date to be used within the callback.
* Using setTestNow to set the date, executing the callback, then
* clearing the test instance.
*
* /!\ Use this method for unit tests only.
*
* @param Closure|static|string|false|null $testNow real or mock Carbon instance
* @param Closure|null $callback
*/
public static function withTestNow($testNow = null, $callback = null)
{
static::setTestNow($testNow);
$callback();
static::setTestNow();
}
/**
* Get the Carbon instance (real or mock) to be returned when a "now"
* instance is created.
*
* @return Closure|static the current instance used for testing
*/
public static function getTestNow()
{
return static::$testNow;
}
/**
* Determine if there is a valid test instance set. A valid test instance
* is anything that is not null.
*
* @return bool true if there is a test instance, otherwise false
*/
public static function hasTestNow()
{
return static::getTestNow() !== null;
}
/**
* Return the given timezone and set it to the test instance if not null.
* If null, get the timezone from the test instance and return it.
*
* @param string|\DateTimeZone $tz
* @param \Carbon\CarbonInterface $testInstance
*
* @return string|\DateTimeZone
*/
protected static function handleMockTimezone($tz, &$testInstance)
{
//shift the time according to the given time zone
if ($tz !== null && $tz !== static::getMockedTestNow($tz)->getTimezone()) {
$testInstance = $testInstance->setTimezone($tz);
return $tz;
}
return $testInstance->getTimezone();
}
/**
* Get the mocked date passed in setTestNow() and if it's a Closure, execute it.
*
* @param string|\DateTimeZone $tz
*
* @return \Carbon\CarbonImmutable|\Carbon\Carbon|null
*/
protected static function getMockedTestNow($tz)
{
$testNow = static::getTestNow();
if ($testNow instanceof Closure) {
$realNow = new DateTimeImmutable('now');
$testNow = $testNow(static::parse(
$realNow->format('Y-m-d H:i:s.u'),
$tz ?: $realNow->getTimezone()
));
}
/* @var \Carbon\CarbonImmutable|\Carbon\Carbon|null $testNow */
return $testNow;
}
protected static function mockConstructorParameters(&$time, &$tz)
{
/** @var \Carbon\CarbonImmutable|\Carbon\Carbon $testInstance */
$testInstance = clone static::getMockedTestNow($tz);
$tz = static::handleMockTimezone($tz, $testInstance);
if (static::hasRelativeKeywords($time)) {
$testInstance = $testInstance->modify($time);
}
$time = $testInstance instanceof self ? $testInstance->rawFormat(static::MOCK_DATETIME_FORMAT) : $testInstance->format(static::MOCK_DATETIME_FORMAT);
}
}
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