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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 Carbon\CarbonInterface;
use Carbon\CarbonTimeZone;
use Closure;
use DateTimeImmutable;
use DateTimeInterface;
use InvalidArgumentException;
use Throwable;
trait Test
{
///////////////////////////////////////////////////////////////////
///////////////////////// TESTING AIDS ////////////////////////////
///////////////////////////////////////////////////////////////////
/**
* A test Carbon instance to be returned when now instances are created.
*
* @var Closure|static|null
*/
protected static $testNow;
/**
* The timezone to resto to when clearing the time mock.
*
* @var string|null
*/
protected static $testDefaultTimezone;
/**
* 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.
*
* Only the moment is mocked with setTestNow(), the timezone will still be the one passed
* as parameter of date_default_timezone_get() as a fallback (see setTestNowAndTimezone()).
*
* To clear the test instance call this method using the default
* parameter of null.
*
* /!\ Use this method for unit tests only.
*
* @param DateTimeInterface|Closure|static|string|false|null $testNow real or mock Carbon instance
*/
public static function setTestNow($testNow = null)
{
static::$testNow = $testNow instanceof self || $testNow instanceof Closure
? $testNow
: static::make($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().
*
* It will also align default timezone (e.g. call date_default_timezone_set()) with
* the second argument or if null, with the timezone of the given date object.
*
* To clear the test instance call this method using the default
* parameter of null.
*
* /!\ Use this method for unit tests only.
*
* @param DateTimeInterface|Closure|static|string|false|null $testNow real or mock Carbon instance
*/
public static function setTestNowAndTimezone($testNow = null, $tz = null)
{
if ($testNow) {
self::$testDefaultTimezone = self::$testDefaultTimezone ?? date_default_timezone_get();
}
$useDateInstanceTimezone = $testNow instanceof DateTimeInterface;
if ($useDateInstanceTimezone) {
self::setDefaultTimezone($testNow->getTimezone()->getName(), $testNow);
}
static::setTestNow($testNow);
if (!$useDateInstanceTimezone) {
$now = static::getMockedTestNow(\func_num_args() === 1 ? null : $tz);
$tzName = $now ? $now->tzName : null;
self::setDefaultTimezone($tzName ?? self::$testDefaultTimezone ?? 'UTC', $now);
}
if (!$testNow) {
self::$testDefaultTimezone = null;
}
}
/**
* 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 DateTimeInterface|Closure|static|string|false|null $testNow real or mock Carbon instance
* @param Closure|null $callback
*
* @return mixed
*/
public static function withTestNow($testNow = null, $callback = null)
{
static::setTestNow($testNow);
try {
$result = $callback();
} finally {
static::setTestNow();
}
return $result;
}
/**
* Get the Carbon instance (real or mock) to be returned when a "now"
* instance is created.
*
* @return Closure|static the current instance used for testing
*/
public static function getTestNow()
{
return static::$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;
}
/**
* 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 instanceof CarbonInterface
? $testNow->avoidMutation()->tz($tz)
: $testNow;
}
protected static function mockConstructorParameters(&$time, $tz)
{
/** @var \Carbon\CarbonImmutable|\Carbon\Carbon $testInstance */
$testInstance = clone static::getMockedTestNow($tz);
if (static::hasRelativeKeywords($time)) {
$testInstance = $testInstance->modify($time);
}
$time = $testInstance instanceof self
? $testInstance->rawFormat(static::MOCK_DATETIME_FORMAT)
: $testInstance->format(static::MOCK_DATETIME_FORMAT);
}
private static function setDefaultTimezone($timezone, DateTimeInterface $date = null)
{
$previous = null;
$success = false;
try {
$success = date_default_timezone_set($timezone);
} catch (Throwable $exception) {
$previous = $exception;
}
if (!$success) {
$suggestion = @CarbonTimeZone::create($timezone)->toRegionName($date);
throw new InvalidArgumentException(
"Timezone ID '$timezone' is invalid".
($suggestion && $suggestion !== $timezone ? ", did you mean '$suggestion'?" : '.')."\n".
"It must be one of the IDs from DateTimeZone::listIdentifiers(),\n".
'For the record, hours/minutes offset are relevant only for a particular moment, '.
'but not as a default timezone.',
0,
$previous
);
}
}
}
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