[BUGFIX] VariableFrontend initializeObject not called

The method is protected and is not called in the container then

Change-Id: I03ab47aa1030e782d14304d9371fc62b9c5aed18
Fixes: #35915
Releases: 6.0, 4.7, 4.6, 4.5
Reviewed-on: http://review.typo3.org/10356
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn

t3lib/cache/frontend/class.t3lib_cache_frontend_variablefrontend.php

@@ -49,7 +49,7 @@ class t3lib_cache_frontend_VariableFrontend extends t3lib_cache_frontend_Abstrac
 	 *
 	 * @return void
 	 */
-	protected function initializeObject() {
+	public function initializeObject() {
 		$this->useIgBinary = extension_loaded('igbinary');
 	}
 

tests/Unit/t3lib/cache/frontend/class.t3lib_cache_frontend_variablefrontendTest.php

@@ -102,6 +102,7 @@ class t3lib_cache_frontend_VariableFrontendTest extends tx_phpunit_testcase {
 		$backend->expects($this->once())->method('set')->with($this->equalTo('VariableCacheTest'), $this->equalTo(igbinary_serialize($theString)));
 
 		$cache = new t3lib_cache_frontend_VariableFrontend('VariableFrontend', $backend);
+		$cache->initializeObject();
 		$cache->set('VariableCacheTest', $theString);
 	}
 
@@ -159,6 +160,7 @@ class t3lib_cache_frontend_VariableFrontendTest extends tx_phpunit_testcase {
 		$backend->expects($this->once())->method('get')->will($this->returnValue(igbinary_serialize($theArray)));
 
 		$cache = new t3lib_cache_frontend_VariableFrontend('VariableFrontend', $backend);
+		$cache->initializeObject();
 
 		$this->assertEquals($theArray, $cache->get('VariableCacheTest'), 'The returned value was not the expected unserialized array.');
 	}
@@ -241,6 +243,7 @@ class t3lib_cache_frontend_VariableFrontendTest extends tx_phpunit_testcase {
 		$backend->expects($this->exactly(2))->method('get')->will($this->onConsecutiveCalls(igbinary_serialize('one value'), igbinary_serialize('two value')));
 
 		$cache = new t3lib_cache_frontend_VariableFrontend('VariableFrontend', $backend);
+		$cache->initializeObject();
 		$this->assertEquals($entries, $cache->getByTag($tag), 'Did not receive the expected entries');
 	}
 }