Fixed HHVM tests (#15330)

* Fixed Ipv6ExpandingWithInvalidValue test on HHVM

* Skip PgSQLCache tests on HHVM

tests/framework/caching/PgSQLCacheTest.php

@@ -25,6 +25,9 @@ class PgSQLCacheTest extends DbCacheTest
         if (!extension_loaded('pdo') || !extension_loaded('pdo_pgsql')) {
             $this->markTestSkipped('pdo and pdo_pgsql extensions are required.');
         }
+        if (defined('HHVM_VERSION')) {
+            $this->markTestSkipped('HHVMs PgSQL implementation does not seem to support blob colums in the way they are used here.');
+        }
 
         $this->getConnection()->createCommand('
 CREATE TABLE IF NOT EXISTS "cache"

tests/framework/helpers/IpHelperTest.php

@@ -56,7 +56,7 @@ class IpHelperTest extends TestCase
         try {
             IpHelper::expandIPv6('fa01::1/64');
         } catch (\Exception $exception) {
-            $this->assertSame('inet_pton(): Unrecognized address fa01::1/64', $exception->getMessage());
+            $this->assertStringEndsWith('Unrecognized address fa01::1/64', $exception->getMessage());
         }
     }