silverstripe-postgresql/tests/PostgreSQLDatabaseTest.php

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<?php
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namespace SilverStripe\PostgreSQL\Tests;
use Exception;
use Page;
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use SilverStripe\Dev\SapphireTest;
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use SilverStripe\ORM\DataObject;
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use SilverStripe\ORM\DB;
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use SilverStripe\PostgreSQL\PostgreSQLDatabase;
/**
* @package postgresql
* @subpackage tests
*/
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class PostgreSQLDatabaseTest extends SapphireTest
{
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protected $usesDatabase = true;
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public function testReadOnlyTransaction()
{
if (DB::get_conn()->supportsTransactions() == true
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&& DB::get_conn() instanceof PostgreSQLDatabase
) {
$page = new Page();
$page->Title = 'Read only success';
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$page->write();
DB::get_conn()->transactionStart('READ ONLY');
try {
$page = new Page();
$page->Title = 'Read only page failed';
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$page->write();
} catch (Exception $e) {
//could not write this record
//We need to do a rollback or a commit otherwise we'll get error messages
DB::get_conn()->transactionRollback();
}
DB::get_conn()->transactionEnd();
DataObject::flush_and_destroy_cache();
$success = DataObject::get('Page', "\"Title\"='Read only success'");
$fail = DataObject::get('Page', "\"Title\"='Read only page failed'");
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//This page should be in the system
$this->assertTrue(is_object($success) && $success->exists());
//This page should NOT exist, we had 'read only' permissions
$this->assertFalse(is_object($fail) && $fail->exists());
} else {
$this->markTestSkipped('Current database is not PostgreSQL');
}
}
}