From 501409f3898fa16e688ff58b1412b33e9f039cbd Mon Sep 17 00:00:00 2001
From: webchick <drupal@webchick.net>
Date: Thu, 12 Mar 2015 02:56:21 -0700
Subject: [PATCH] Issue #2443655 by daffie, bzrudi71: PostgreSQL: Fix
 system\Tests\Entity\EntityReferenceFieldTest

---
 core/modules/system/src/Tests/Entity/EntityUnitTestBase.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/core/modules/system/src/Tests/Entity/EntityUnitTestBase.php b/core/modules/system/src/Tests/Entity/EntityUnitTestBase.php
index a11bce1deb1..89deb62437d 100644
--- a/core/modules/system/src/Tests/Entity/EntityUnitTestBase.php
+++ b/core/modules/system/src/Tests/Entity/EntityUnitTestBase.php
@@ -188,7 +188,10 @@ abstract class EntityUnitTestBase extends KernelTestBase {
   protected function generateRandomEntityId($string = FALSE) {
     srand(time());
     do {
-      $id = $string ? $this->randomMachineName() : mt_rand(1, 0xFFFFFFFF);
+      // 0x7FFFFFFF is the maximum allowed value for integers that works for all
+      // Drupal supported databases and is known to work for other databases
+      // like SQL Server 2014 and Oracle 10 too.
+      $id = $string ? $this->randomMachineName() : mt_rand(1, 0x7FFFFFFF);
     }
     while (isset($this->generatedIds[$id]));
     $this->generatedIds[$id] = $id;