testing

PhabricatorPackagesVersionPackageTransaction.php
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			<?php

			final class PhabricatorPackagesVersionPackageTransaction
			extends PhabricatorPackagesVersionTransactionType {

			const TRANSACTIONTYPE = 'packages.version.package';

			public function generateOldValue($object) {
			return $object->getPackagePHID();
			}

			public function applyInternalEffects($object, $value) {
			$object->setPackagePHID($value);
			}

			public function validateTransactions($object, array $xactions) {
			$errors = array();

			if ($this->isEmptyTextTransaction($object->getPackagePHID(), $xactions)) {
			$errors[] = $this->newRequiredError(
			pht(
			'You must select a package when creating a version'));
			return $errors;
			}

			if (!$this->isNewObject()) {
			foreach ($xactions as $xaction) {
			$errors[] = $this->newInvalidError(
			pht('Once a version is created, its package can not be changed.'),
			$xaction);
			}
			}

			$viewer = $this->getActor();
			foreach ($xactions as $xaction) {
			$package_phid = $xaction->getNewValue();

			$package = id(new PhabricatorPackagesPackageQuery())
			->setViewer($viewer)
			->withPHIDs(array($package_phid))
			->setRaisePolicyExceptions(false)
			->requireCapabilities(
			array(
			PhabricatorPolicyCapability::CAN_VIEW,
			PhabricatorPolicyCapability::CAN_EDIT,
			))
			->executeOne();

			if (!$package) {
			$errors[] = $this->newInvalidError(
			pht(
			'Package "%s" is invalid: the package must exist and you '.
			'must have permission to edit it in order to create a new '.
			'package.',
			$package_phid),
			$xaction);
			continue;
			}

			$object->attachPackage($package);
			}

			return $errors;
			}

			}